configure.in 234 KB
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AC_PREREQ(2.63)
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# 
# (C) 2006 by Argonne National Laboratory.
#     See COPYRIGHT in top-level directory.
#
dnl Process this file with autoconf to produce a configure script.
dnl
dnl aclocal_cache.m4, included by sowing/confdb/aclocal.m4, fixes 
dnl bugs in autoconf caching.
dnl
dnl This is a large configure script and it is important to keep it
dnl clearly organized.  In addition, this script must coordinate with 
dnl the other modules that can be used to construct MPICH2, such as
dnl the communication device and the process manager.  Each of these
dnl may have special features or limitations that other modules or
dnl this configure may need to take into account.  To handle this, there
dnl are xx major steps in this configure script:
dnl
dnl 1. Identify major modules and source any prerequisite scripts
dnl 2. Determine compiler characteristics 
dnl 3. Setup and configure the other modules
dnl 4. Determine MPI features and characteristics (such as datatype values)
dnl
dnl Each of these is described in more detail below.
dnl
dnl 1. Identify the modules (most are specified by 
dnl --with-<modulename>=instance,
dnl for example, --with-pm=mpd or --with-device=ch3:nemesis).
dnl For each module, source the file mpich2prereq if present (in the
dnl module's top-level directory).  This
dnl must be a bourne (sh) shell script; it can access any of the variables
dnl in the configure script.  In addition, there are a few variables that
dnl are defined and provided to allow the modules to communicate their 
dnl needs or limitations to the other modules.  These are:
dnl    MPID_MAX_THREAD_LEVEL - thread level supported by device.
dnl                            if unset, is MPI_THREAD_FUNNELED
dnl    MPID_NO_LONG_LONG     - if yes, the device does not support the 
dnl                            long long integer type
dnl    MPID_NO_LONG_DOUBLE   - if yes, the device does not support the
dnl                            long double type
dnl    MPID_PM_NAMESERVER    - if set, provides the name of the nameserver
dnl                            that the process manager supports.
dnl                            This name server will be used if the
dnl                            default name server is selected.
dnl    MPID_NO_PM            - If yes, the device does not require any
dnl                            PM implementation.  
dnl    MPID_NO_PMI           - If yes, the device does not require any 
dnl                            PMI implementation.
dnl    EXTRA_STATUS_DECL     - Any extra declarations that the device
dnl                            needs added to the definition of MPI_Status.
dnl    MPID_MAX_PROCESSOR_NAME - The maximum number of character in a processor
dnl                            name.  If not set, 128 will be used.
dnl    PMI_REQUIRES_READABLE_TOKENS - if yes, define the C-preprocessor
dnl                            value USE_HUMAN_READABLE_TOKENS, which is
dnl                            used in src/include/mpimem.h to define token
dnl                            separators used in src/util/mem/argstr.c
dnl    PM_REQUIRES_PMI       - if set, provides the name of the PMI 
dnl                            interface implementation.  If not set,
dnl                            the "simple" PMI implementation is used.
dnl                            A process manager that needs a particular
dnl                            process manager should check that this is
dnl                            not set to an incompatible value.
dnl    MPID_NO_SPAWN         - if yes, the device does not support the
dnl                            dynamic process routines (spawn, connect
dnl                            attach, join, plus port and publish 
dnl                            routines).  The major effect of this
dnl                            is to let the test codes know that
dnl                            spawn is not implemented.
dnl    MPID_NO_RMA           - if yes, the device does not support the
dnl                            MPI RMA routines (MPI_Win_create and 
dnl                            MPI_Put etc.).  The major effect of this
dnl                            is to let the test codes know that 
dnl                            RMA is not implemented.
dnl
dnl Note that the meanings of these variables are defined so that an 
dnl undefined value gives the default.  This makes it easy to expand
dnl the set of such variables, since only modules that need the new
dnl variable will need to be changed.
dnl
dnl 2. Determine compiler characteristics
dnl Here is where features of the compilers are determined, including
dnl support for shared libraries and sizes of the basic datatype types.
dnl
dnl 3. Setup and configure the other modules
dnl Before each module configure is executed, the script setup_<module>
dnl is run if present.  This is a bourne (sh) shell script and may
dnl access configure variables.  It should not make any changes to the
dnl compiler name or flags (e.g., do not add -D_XOPEN_SOURCE to CFLAGS here,
dnl because that may invalidate the determination of the compiler 
dnl characteristics in the prior step).
dnl
dnl 4. Determine MPI features
dnl    
dnl
dnl Special environment variables
dnl To let other scripts and in particular the configure in test/mpi
dnl know that they are being invoked from within the MPICH2 configure,
dnl the following environment variables are set and exported:
dnl    FROM_MPICH2
dnl    MPICH2_ENABLE_F77
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dnl    MPICH2_ENABLE_FC
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dnl    MPICH2_ENABLE_CXX
dnl
dnl The file name here refers to a file in the source being configured
dnl In later versions of autoconf, the binding of AC_INIT changed (!!!)
dnl The original version was AC_INIT(a source file)
dnl The later version is AC_INIT(package,version,[bug-report],[tarname])
dnl Here we use the original version
dnl AC_INIT(src/include/mpiimpl.h)
dnl
dnl Note that no executable statements are allowed (and any are silently 
dnl dropped) before AC_INIT.
dnl
dnl AC_INIT requires an explicit version number
dnl Args are package name, version, bug report, and tar file name
dnl All must be literals
dnl Note that AC_PACKAGE_STRING is not a command but must be defined(!)
dnl Unfortunately, setting the PACKAGE names is not compatible with
dnl AC_CONFIG_SUBDIRS, since the resulting values in the generated
dnl conf file will not be consistent.
dnl define([AC_PACKAGE_STRING],[MPICH2 1.0.6])
dnl AC_INIT(mpich2,1.0.6,mpich2-maint@mcs.anl.gov,mpich2-1.0.6)
dnl Use the oldstyle AC_INIT instead
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AC_INIT(src/include/mpichconf.h.in)
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CONFIGURE_ARGS_CLEAN=`echo $* | tr '"' ' '`
AC_SUBST(CONFIGURE_ARGS_CLEAN)

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# Try to find the version and release date
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if test -s "$srcdir/maint/Version" ; then
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    . $srcdir/maint/Version
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    export MPICH2_VERSION
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else
    AC_MSG_ERROR([Version information not found. Configuration aborted.])
fi
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AC_SUBST(MPICH2_RELEASE_DATE)
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# Produce a numeric version assuming the following format:
# Version: [MAJ].[MIN].[REV][EXT][EXT_NUMBER]
# Example: 1.0.7rc1 has
#          MAJ = 1
#          MIN = 0
#          REV = 7
#          EXT = rc
#          EXT_NUMBER = 1
#
# Converting to numeric version will convert EXT to a format number:
#          ALPHA (a) = 0
#          BETA (b)  = 1
#          RC (rc)   = 2
#          PATCH (p) = 3
# Regular releases are treated as patch 0
#
# Numeric version will have 1 digit for MAJ, 2 digits for MIN,
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# 2 digits for REV, 1 digit for EXT and 2 digits for EXT_NUMBER.
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changequote(<<,>>)
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V1=`expr $MPICH2_VERSION : '\([0-9]*\)\.[0-9]*\.*[0-9]*[a-zA-Z]*[0-9]*'`
V2=`expr $MPICH2_VERSION : '[0-9]*\.\([0-9]*\)\.*[0-9]*[a-zA-Z]*[0-9]*'`
V3=`expr $MPICH2_VERSION : '[0-9]*\.[0-9]*\.*\([0-9]*\)[a-zA-Z]*[0-9]*'`
V4=`expr $MPICH2_VERSION : '[0-9]*\.[0-9]*\.*[0-9]*\([a-zA-Z]*\)[0-9]*'`
V5=`expr $MPICH2_VERSION : '[0-9]*\.[0-9]*\.*[0-9]*[a-zA-Z]*\([0-9]*\)'`
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changequote([,])
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if test "$V2" -le 9 ; then V2=0$V2 ; fi
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if test "$V3" = "" ; then V3=0; fi
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if test "$V3" -le 9 ; then V3=0$V3 ; fi
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if test "$V4" = "a" ; then
    V4=0
elif test "$V4" = "b" ; then
    V4=1
elif test "$V4" = "rc" ; then
    V4=2
elif test "$V4" = "" ; then
    V4=3
    V5=0
elif test "$V4" = "p" ; then
    V4=3
fi
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if test "$V5" -le 9 ; then V5=0$V5 ; fi
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MPICH2_NUMVERSION=`expr $V1$V2$V3$V4$V5 + 0`
AC_SUBST(MPICH2_NUMVERSION)
AC_SUBST(MPICH2_VERSION)
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# ABIVERSION is the name used by simplemake, so we reassign the
# libmpich_so_version number to it
ABIVERSION=${libmpich_so_version}
export ABIVERSION
export libmpich_so_version
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AC_SUBST(ABIVERSION)
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# Print out the configure options
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CONFIGURE_ARGUMENTS="$ac_configure_args"
AC_SUBST(CONFIGURE_ARGUMENTS)
if test -n "$ac_configure_args" ; then
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    echo "Configuring MPICH2 version $MPICH2_VERSION with $ac_configure_args"
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else 
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    echo "Configuring MPICH2 version $MPICH2_VERSION"
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fi
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# Add the information on the system:
echo "Running on system: `uname -a`"
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dnl Definitions will be placed in this file rather than in the DEFS variable
AC_CONFIG_HEADER(src/include/mpichconf.h)
AH_TOP([/* -*- Mode: C; c-basic-offset:4 ; -*- */
/*  
 *  (C) 2001 by Argonne National Laboratory.
 *      See COPYRIGHT in top-level directory.
 */
#ifndef MPICHCONF_H_INCLUDED
#define MPICHCONF_H_INCLUDED
])
AH_BOTTOM([#endif])

dnl Set the directory that contains support scripts such as install-sh and
dnl config.guess
AC_CONFIG_AUX_DIR(confdb)
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# Set the FROM_MPICH2 variable to tell subconfigures that they are
# built from within MPICH2
FROM_MPICH2=yes
export FROM_MPICH2
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AC_ARG_VAR(FROM_MPICH2,
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	[internal flag to tell subconfigures that
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	they are built from within MPICH2])
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# Save a copy of precious flags as USER_* before any of these flags
# are being modified by configure tests.
PAC_PREFIX_ALL_FLAGS(USER)
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# WRAPPER_xFLAGS are used by mpicc and friends.
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#
# WRAPPER_CFLAGS and other compile flags are used for compile options
# that are added by MPICH2, but should be used by applications (such
# as include paths).
#
# All libraries that are detected by MPICH2 as needed for some of its
# functionality (such as -lpthread) should be added to LIBS so
# autoconf link tests can use them. Libraries that are built by MPICH2
# at make time (and hence are not available for autoconf link tests to
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# use), such as OPA and MPL, should be added to WRAPPER_LIBS for
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# static builds. All libraries in LIBS are added to WRAPPER_LIBS
# (similarly LDFLAGS are added to WRAPPER_LDFLAGS) as well, at the end
# of configure.
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PAC_PREFIX_ALL_FLAGS(WRAPPER)
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WRAPPER_CFLAGS="$CFLAGS $MPICH2_MPICC_FLAGS"
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WRAPPER_CPPFLAGS="$CPPFLAGS $MPICH2_MPICPP_FLAGS"
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WRAPPER_CXXFLAGS="$CXXFLAGS $MPICH2_MPICXX_FLAGS"
WRAPPER_FFLAGS="$FFLAGS $MPICH2_MPIF77_FLAGS"
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WRAPPER_FCFLAGS="$FCFLAGS $MPICH2_MPIFC_FLAGS"
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WRAPPER_LDFLAGS="$MPICH2_LDFLAGS"
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WRAPPER_LIBS="$MPICH2_LIBS"
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# Add MPICH2LIB_* to the appropriate flags
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AC_ARG_VAR(MPICH2LIB_CFLAGS,
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	[extra CFLAGS used in building MPICH2 libraries])
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AC_ARG_VAR(MPICH2LIB_CPPFLAGS,
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	[extra CPPFLAGS used in building MPICH2 libraries])
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AC_ARG_VAR(MPICH2LIB_CXXFLAGS,
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	[extra CXXFLAGS used in building MPICH2 libraries])
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AC_ARG_VAR(MPICH2LIB_FFLAGS,
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	[extra FFLAGS used in building MPICH2 libraries])
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AC_ARG_VAR(MPICH2LIB_FCFLAGS,
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	[extra FCFLAGS used in building MPICH2 libraries])
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AC_ARG_VAR(MPICH2LIB_LDFLAGS,
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	[extra LDFLAGS used in building MPICH2 libraries])
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AC_ARG_VAR(MPICH2LIB_LIBS,
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	[extra LIBS used in building MPICH2 libraries])
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CFLAGS="$CFLAGS $MPICH2LIB_CFLAGS"
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CPPFLAGS="$CPPFLAGS $MPICH2LIB_CPPFLAGS"
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CXXFLAGS="$CXXFLAGS $MPICH2LIB_CXXFLAGS"
FFLAGS="$FFLAGS $MPICH2LIB_FFLAGS"
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FCFLAGS="$FCFLAGS $MPICH2LIB_FCFLAGS"
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LDFLAGS="$LDFLAGS $MPICH2LIB_LDFLAGS"
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LIBS="$LIBS $MPICH2LIB_LIBS"
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AC_ARG_ENABLE(lib-depend,
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	AC_HELP_STRING([--enable-lib-depend], [Turn on library dependencies (experimental)]),,
	[enable_lib_depend=no])
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AC_ARG_ENABLE(echo, 
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	AC_HELP_STRING([--enable-echo], [Turn on strong echoing. The default is enable=no.]),
	set -x)

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AC_ARG_ENABLE(coverage,
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	AC_HELP_STRING([--enable-coverage], [Turn on coverage analysis using gcc and gcov]),,
	enable_coverage=no)

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AC_ARG_ENABLE(dynamiclibs,
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	AC_HELP_STRING([--enable-dynamiclibs], [Enable the use of dynamic libraries
                       by the devices that support them]),,enable_dynamiclibs=no)

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AC_ARG_ENABLE(error-checking,
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[  --enable-error-checking=level
      Control the amount of error checking.  
        no        - no error checking
        runtime   - error checking controllable at runtime through environment 
                    variables
        all       - error checking always enabled
],,enable_error_checking=all)

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AC_ARG_ENABLE(error-messages,
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[  --enable-error-messages=level - Control the amount of detail in error messages.
        all       - Maximum amount of information
        generic   - Only generic messages (no information about the specific
                    instance)
        class     - One message per MPI error class
        none      - No messages
],,enable_error_messages=all)

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AC_ARG_ENABLE(timing,
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[  --enable-timing=level - Control the amount of timing information
                           collected by the MPICH implementation.
        none    - Collect no data (default)
        all     - Collect lots of data
        runtime - Runtime control of data collected
],,enable_timing=default)

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AC_ARG_ENABLE(g,
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[  --enable-g=option - Control the level of debugging support in the
                      MPICH implementation.  option is a list of comma
                      separated names including
        none     - No debugging
        handle   - Trace handle operations
        handlealloc - Trace handle allocations
        dbg      - Add compiler flag, -g, to all internal
                   compiler flags, i.e. MPICH2LIB_CFLAGS, MPICH2LIB_CXXFLAGS,
                   MPICH2LIB_FFLAGS, and MPICH2LIB_FCFLAGS.
        debug    - Synonym for dbg
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        instr    - Enable instrumentation
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        log      - Enable debug event logging
        mem      - Memory usage tracing
        meminit  - Preinitialize memory associated structures and unions to
                   eliminate access warnings from programs like valgrind
        memarena - Check for overwrite errors in memory allocation arena
        mutex    - Enable error checking on pthread mutexes
        mutexnesting - Check for non-nesting of mutexes
        all      - All of the above choices
],,enable_g=none)

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dnl We may want to force MPI_Aint to be the same size as MPI_Offset, 
dnl particularly on 32 bit systems with large (64 bit) file systems.
AC_ARG_WITH(aint-size,
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	AC_HELP_STRING([--with-aint-size], [Override the size of MPI_AINT (in bytes)]),,
	with_aint_size=0)

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AC_ARG_ENABLE(fast,
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[  --enable-fast=option - Control the level of fast execution in the
                         MPICH implementation.  option is a list of
                         comma separated names including
        defopt   - Default compiler optimization -O2 for all language bindings,
                   i.e. --enable-fast=O2, when neither --enable-fast
                   nor --disable-fast is specified. (default)
        O<n>     - Appends default optimization flags, -O<n>, to all internal
                   compiler flags, i.e. MPICH2LIB_CFLAGS, MPICH2LIB_CXXFLAGS,
                   MPICH2LIB_FFLAGS, and MPICH2LIB_FCFLAGS.
        nochkmsg - No error checking, i.e. --disable-error-checking
        notiming - No timing collection, i.e. --disable-timing.
        ndebug   - Appends -DNDEBUG to MPICH2LIB_CFLAGS.
        all|yes  - "defopt", "nochkmsg", "notiming" and "ndebug" are enabled
                   when --enable-fast is specified without any option.
        none     - None of above options, i.e. --disable-fast. Note that
                   --enable-strict will add the -O2 option even if
                   --enable-fast=none is given.
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],,enable_fast=defopt)
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AC_ARG_ENABLE(check-compiler-flags,
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	AC_HELP_STRING([--enable-check-compiler-flags], [enable the checks for all compiler
                       options, xxxFLAGS, MPICH2_xxxFLAGS. Default is on.]),,
		       enable_check_compiler_flags=yes)
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dnl We enable f77 and fc if we can find compilers for them.
dnl In addition, we check whether f77 and fc can work together.
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AC_ARG_ENABLE(f77,
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	AC_HELP_STRING([--enable-f77], [Enable Fortran 77 bindings]),,
	enable_f77=default;enable_f77_wasdefault=yes)

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AC_ARG_ENABLE(fc,
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	AC_HELP_STRING([--enable-fc], [Enable Fortran 90 bindings]),,enable_fc=yes)
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AC_ARG_ENABLE(f90,
	AC_HELP_STRING([--enable-f90],
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		[Obsolete option: Use --enable-fc or --disable-fc instead]),
	[AC_MSG_ERROR([
--enable-f90 and --disable-f90 are NO longer valid configure options,
use --enable-fc or --disable-fc instead])]
)
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AC_ARG_ENABLE(cxx,
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	AC_HELP_STRING([--enable-cxx], [Enable C++ bindings]),,enable_cxx=default)

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AC_ARG_ENABLE(romio,
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	AC_HELP_STRING([--enable-romio], [Enable ROMIO MPI I/O implementation]),,
	enable_romio=yes)

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AC_ARG_ENABLE(debuginfo,
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	AC_HELP_STRING([--enable-debuginfo], [Enable support for debuggers]),,
	enable_debuginfo=no)
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AC_ARG_ENABLE(smpcoll,
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	AC_HELP_STRING([--enable-smpcoll],
			[Enable support for SMP/multi-core aware collectives]),
	smpcoll=$enableval,smpcoll=yes)
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if test $smpcoll = "yes" ; then
   AC_DEFINE(USE_SMP_COLLECTIVES,1,[define to enable SMP/multi-core aware collectives])
fi

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dnl The environment variable MPICH_DEBUGLIBNAME may be used to
dnl override the default name of the library that the debugger will
dnl load to access the MPICH2 internal data structures.
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AC_ARG_ENABLE(nmpi-as-mpi,
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	AC_HELP_STRING([--enable-nmpi-as-mpi], [Use MPI rather than PMPI routines for MPI
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                       routines, such as the collectives, that may be
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                       implemented in terms of other MPI routines]),,
	enable_nmpi_as_mpi=no)
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dnl "default" is a special device that allows MPICH to choose one
dnl based on the environment.
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AC_ARG_WITH(device,
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	AC_HELP_STRING([--with-device=name], [Specify the communication device for MPICH]),,
	with_device=default)

AC_ARG_WITH(pmi,
	AC_HELP_STRING([--with-pmi=name], [Specify the pmi interface for MPICH]),,
	with_pmi=default)

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AC_ARG_WITH(pm, 
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	AC_HELP_STRING([--with-pm=name],
		[Specify the process manager for MPICH.  "no" or "none" are
                 valid values.  Multiple process managers may be specified as
                 long as they all use the same pmi interface by separating them
                 with colons.  The mpiexec for the first named process manager
                 will be installed.  Example: "--with-pm=hydra:mpd:gforker"
                 builds the three process managers hydra, mpd and gforker;
                 only the mpiexec from hydra is installed into the bin
                 directory.]),,with_pm=default)

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AC_ARG_WITH(logging,
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	AC_HELP_STRING([--with-logging=name], [Specify the logging library for MPICH]),
	[if test -z "$withval" ; then with_logging=rlog ; fi],with_logging=none)

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dnl both --without-mpe and --disable-mpe are supported
dnl AC_ARG_ENABLE(mpe) is used only when --with(out)-mpe is not used.
AC_ARG_WITH(mpe,
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	AC_HELP_STRING([--with-mpe], [Build the MPE (MPI Parallel Environment) routines]),,
	with_mpe=default)
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if test "$with_mpe" = "default" ; then
    AC_ARG_ENABLE(mpe,
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	AC_HELP_STRING([--enable-mpe], [Build the MPE (MPI Parallel Environment) routines]),
	with_mpe=$enableval,with_mpe=default)
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fi
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dnl
dnl The default option needs to be defined in terms of a specific choice 
dnl (runtime in this case).  Note that the default choice is the same as
dnl runtime only for certain devices - not for every device.
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AC_ARG_ENABLE(threads,
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[  --enable-threads=level - Control the level of thread support in the 
                           MPICH implementation.  The following levels
                           are supported.
        single          - No threads (MPI_THREAD_SINGLE)
        funneled        - Only the main thread calls MPI (MPI_THREAD_FUNNELED)
        serialized      - User serializes calls to MPI (MPI_THREAD_SERIALIZED)
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        runtime         - The level of thread support is determined by 
                          the arguments to MPI_Init_thread, with
                          MPI_THREAD_MULTIPLE available.  The default option
                          for many communication devices.
        multiple        - Fully multi-threaded (MPI_THREAD_MULTIPLE) always. 
                          DO NOT select this option. The option runtime is more
                          efficient and also supports thread_multiple. 
                          (multiple aliased to runtime now)
        default         - Make a good choice depending on the communication
                          device.  For ch3:nemesis, this is runtime.
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        See also the --enable-thread-cs option for controlling the granularity of
        the concurrency inside of the library
],,enable_threads=default)
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AC_ARG_ENABLE(thread-cs,
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	AC_HELP_STRING([--enable-thread-cs=type],
			[Choose the method used for critical sections
                         and other atomic updates when multiple
                         threads are present.  Values may be global
                         (default), per-object, lock-free]),,enable_thread_cs=global)
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AC_ARG_ENABLE(refcount,
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	AC_HELP_STRING([--enable-refcount=type],
			[Choose the method for ensuring atomic updates
                         to the reference counts for MPI objects.
                         Values may be lock, lock-free, none.  The
                         default depends on the thread-cs choice; for
                         global it is none (because none is required),
                         for per-object it is lock, and for lock-free
                         it is lock-free]),,enable_refcount=default)

AC_ARG_ENABLE(mutex-timing,
	AC_HELP_STRING([--enable-mutex-timing], [calculate the time spent waiting on mutexes]),
	AC_DEFINE(MPIU_MUTEX_WAIT_TIME,1,[Define to enable timing mutexes]))
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	AC_HELP_STRING([--enable-handle-allocation=type],
			[Choose the method used for allocating MPI
			 object handles.  Values may be 'tls' for
			 thread-local storage or 'mutex' for simple
			 locking.  'mutex' is the default.]),,enable_handle_allocation=default)
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AC_ARG_ENABLE([predefined-refcount],
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	AS_HELP_STRING([--enable-predefined-refcount],
                       [control whether predefined objects like
		       MPI_COMM_WORLD are reference counted (default
		       depends on --enable-thread-cs choice)]),[],
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              [enable_predefined_refcount=default])

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AC_ARG_ENABLE(weak-symbols,
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	AC_HELP_STRING([--enable-weak-symbols],
			[Use weak symbols to implement PMPI routines (default)]),,
		enable_weak_symbols=yes)

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AC_ARG_ENABLE(multi-aliases,
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	AC_HELP_STRING([--enable-multi-aliases],
		[Multiple aliasing to support multiple fortran compilers (default)]),,
		enable_multi_aliases=yes)

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AC_ARG_WITH(cross,
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	AC_HELP_STRING([--with-cross=file],
		[Specify the values of variables that configure cannot
                 determine in a cross-compilation environment]),,with_cross=no)

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[  --with-namepublisher=name   Choose the system that will support 
                              MPI_PUBLISH_NAME and MPI_LOOKUP_NAME.  Options
                              include
                                   no (no service available)
                                   mpd
			           file[:directory] (optional directory)
                                   pmi],,with_namepublisher=default)
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AC_SUBST(MPIFLIBNAME)
AC_SUBST(PMPIFLIBNAME)
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dnl The default is a special wrapper library
AC_ARG_WITH(fwrapname,
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	AC_HELP_STRING([--with-fwrapname=name],
		[Specify name of library containing Fortran interface routines]),
	[FWRAPNAME=$withval;set_FWRAPNAME="yes"],FWRAPNAME=fmpich)
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AC_SUBST(FWRAPNAME)
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# Find a C compiler.
# We also need to do this before the F77 and FC test to ensure that we
# find the C preprocessor reliably.
PAC_PROG_CC
PAC_PUSH_FLAG([CFLAGS])
AC_PROG_CPP
# Bug in autoconf.  Restore cross settings
if test "$pac_cross_compiling" = "yes" -a "$ac_cv_prog_cc_cross" = "no" ; then
    AC_MSG_RESULT([Resetting cross compilation to yes])
    cross_compiling=yes
    ac_cv_prog_cc_cross=yes
    ac_cv_prog_f77_cross=yes
    ac_cv_prog_fc_cross=yes
    ac_cv_prog_cxx_cross=yes
fi
PAC_POP_FLAG([CFLAGS])

# compute canonical system types
AC_CANONICAL_BUILD
AC_CANONICAL_HOST
# TARGET not needed, MPICH2 isn't a compiler

# Enable better caching control
PAC_ARG_CACHING

# Set CFLAGS for enable strict if necessary.  Do this *first* because
# it may influence the output of the other tests
PAC_ARG_STRICT

# Check for shared library support
PAC_ARG_SHAREDLIBS

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# -----------------------------------------------------------------------------
# First check that we have a clean build if we are doing a VPATH build
PAC_VPATH_CHECK(src/include/mpi.h src/env/mpicc src/env/mpicc.conf,lib)

# ----------------------------------------------------------------------------
# This test is complicated by the fact that top_srcdir is not set until
# the very end of configure.  Instead, we get it ourselves
if test -z "$top_srcdir" ; then
   use_top_srcdir=$srcdir   
else
   use_top_srcdir=$top_srcdir
fi
if test -z "$master_top_srcdir" ; then 
    # This needs to be an absolute pathname
    case "$use_top_srcdir" in
    /*) ;;
    *)
        use_top_srcdir=`(cd $use_top_srcdir && pwd)`
	;;	
    esac
    master_top_srcdir=$use_top_srcdir
fi
# Get the directory that we're running in...
if test -z "$master_top_builddir" ; then
   master_top_builddir="`pwd`"
fi
AC_SUBST(master_top_builddir)
AC_SUBST(master_top_srcdir)
export master_top_builddir
export master_top_srcdir
# ----------------------------------------------------------------------------
# We create this file to allow other configures to find the "master" 
# top builddir
rm -f .mpich2
date > .mpich2
# ----------------------------------------------------------------------------
# with-device
if test "$with_device" = "default" ; then
    # Pick the device.  For now, always choose ch3
    with_device=ch3
fi
# Extract the device name from any options
# Allow the device to specify a directory; if no directory, use the
# included directories
# 
DEVICE=$with_device
AC_SUBST(DEVICE)

device_name=`echo $with_device | sed -e 's/:.*$//'`
changequote(<<,>>)
device_args=`echo $with_device | sed -e 's/^[^:]*//' -e 's/^://'`
changequote([,])

devicedir=$use_top_srcdir/src/mpid/$device_name
devicereldir=src/mpid/$device_name
case "$device_name" in
     /*) 
     devicedir=$DEVICE
     # Get the name from the leaf
     device_name=`echo $device_name ~ sed -e 's%.*/%%'`
     # FIXME: should the devicereldir be different (perhaps not -
     # this allows use to build within our tree, even when other data
     # is outside of the tree)
     ;;
     *) 
     ;;
esac
export device_name
export device_args
export devicedir
# Make the device base name and args available to generated files
DEVICE_NAME=$device_name
AC_SUBST(DEVICE_NAME)
DEVICE_ARGS=$device_args
AC_SUBST(DEVICE_ARGS)
#
# Give the device an opportunity to include a header file in mpi.h.  The
# default value of INCLUDE_MPIDDEFS_H is set prior to the inclusion of the
# device's mpich2prereq script.  The device's script may override the value
# if needed.
INCLUDE_MPIDDEFS_H='/* ... no device specific definitions ... */'
AC_SUBST(INCLUDE_MPIDDEFS_H)

#
# See if the device wants to say something about the compilers (for example,
# the globus device may need to do this)
if test -f $devicedir/mpich2prereq ; then
    . $devicedir/mpich2prereq
fi

# ----------------------------------------------------------------------------
# Set default library names if names haven't already been provided
MPILIBNAME=${MPILIBNAME:-"mpich"}
PMPILIBNAME_set=no
if test -n "$PMPILIBNAME" ; then 
   PMPILIBNAME_set=yes
fi
PMPILIBNAME=${PMPILIBNAME:-"p$MPILIBNAME"}
# Note that the name for this library may be updated after we check for 
# enable_shmem
# Fortran names are set later.
# We use a different library for the C++ wrappers to avoid problems when
# creating shared libraries
if test -z "$MPICXXLIBNAME" ; then MPICXXLIBNAME="${MPILIBNAME}cxx" ; fi
export MPIFLIBNAME
export PMPIFLIBNAME
export MPICXXLIBNAME
AC_SUBST(MPICXXLIBNAME)

# We'll set FORTRAN_BINDING to 1 if we support Fortran 
FORTRAN_BINDING=0

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# Set up default compiler optimization
MPI_DEFAULT_COPTS="-O2"
MPI_DEFAULT_CXXOPTS="-O2"
MPI_DEFAULT_FOPTS="-O2"
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MPI_DEFAULT_FCOPTS="-O2"
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# enable-fast
# strip off multiple options, separated by commas
save_IFS="$IFS"
IFS=","
for option in $enable_fast ; do
    case "$option" in
        defopt)
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        enable_default_optimize=yes
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        ;;
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        nochkmsg)
        enable_fast_nochkmsg=yes
        ;;
        notiming)
        enable_timing=no
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        ;;
        ndebug)
        enable_append_ndebug=yes
        ;;
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#
# [BRT] removed the reseting of enable_g so that --with-enable=dbg,meminit
# can be specified with -enable-fast.  This change was largely made for the
# PETSc folks who want to use --enable-fast to eliminate parameter checking
# overhead, but also wish to use meminit to eliminate initialization
# warnings from valgrind.
#
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        all|yes)
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        enable_default_optimize=yes
        enable_fast_nochkmsg=yes
        # Disable timing/logging stuffs
        enable_timing=no
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        enable_append_ndebug=yes
        ;;
        O*)
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        # Allows O<n> where <n> can be [0-9] or ' '.
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        opt_flags=`echo $option | sed -e 's%\(O[0-9] \)%\1%g'`
        if test -n "$opt_flags" ; then
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            enable_default_optimize=yes
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            MPI_DEFAULT_COPTS="-$option"
            MPI_DEFAULT_CXXOPTS="-$option"
            MPI_DEFAULT_FOPTS="-$option"
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            MPI_DEFAULT_FCOPTS="-$option"
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        else
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	    IFS="$save_IFS"
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            AC_MSG_WARN([Unknown value $option for --enable-fast])
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	    IFS=","
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        fi
        ;;
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        none|no)
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        enable_default_optimize=no
        enable_fast_nochkmsg=no
        # Reset timing/logging stuffs to when --enable-timing isn't specified.
        enable_timing=default
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        enable_append_ndebug=no
        ;;
        *)
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	IFS="$save_IFS"
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        AC_MSG_WARN([Unknown value $option for --enable-fast])
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	IFS=","
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        ;;
    esac
done
IFS="$save_IFS"

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# ----------------------------------------------------------------------------
# Process any enable or with values
# We must do enable-fast first, because it changes the other enable values
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if test "$enable_fast_nochkmsg" = "yes" ; then
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    enable_error_checking=no
    # Export a variable that will allow the test suite to detect that
    # MPICH has no error testing
    MPICH_FAST=yes
    export MPICH_FAST
fi

# error-checking
case "$enable_error_checking" in 
    no)
    # if error checking has been diabled, then automatically diable the error
    # checking tests in the test suite
    ac_configure_args="${ac_configure_args} --disable-checkerrors"
    ;;
    all|yes|runtime)
    error_checking_kind=`echo $enable_error_checking | \
    tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
    error_checking_kind=MPID_ERROR_LEVEL_$error_checking_kind
    AC_DEFINE_UNQUOTED(HAVE_ERROR_CHECKING,$error_checking_kind,[Define to enable error checking])
    ;;
    *)
    AC_MSG_WARN([Unknown value $enable_error_checking for enable-error-checking])
    ;;
esac

# error-messages
case "$enable_error_messages" in 
    no|none)
        error_message_kind="MPICH_ERROR_MSG_NONE"
    ;;
    all|yes)
	error_message_kind="MPICH_ERROR_MSG_ALL"
    ;;
    generic)
	error_message_kind="MPICH_ERROR_MSG_GENERIC"
    ;;
    class)
	error_message_kind="MPICH_ERROR_MSG_CLASS"
    ;;
    *)
    AC_MSG_WARN([Unknown value $enable_error_messages for enable-error-messages])
    ;;
esac
AC_DEFINE_UNQUOTED(MPICH_ERROR_MSG_LEVEL,$error_message_kind,[define to enable error messages])

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# ----------------------------------------------------------------------------
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#
# enable-timing and with-logging
#
# Still to do: add subsets: e.g., class=pt2pt,class=coll.  See mpich2 doc
#
# Logging and timing are intertwined.  If you select logging, you
# may also need to select a timing level.  If no timing is selected 
# but logging with rlog is selected, make "all" the default timing level.
#
# FIXME: make timing and logging options work more cleanly together,
# particularly when other logging options are selected (e.g., logging is not
# rlog).
# ----------------------------------------------------------------------------
collect_stats=false
logging_required=false
if test "$enable_timing" = "default" ; then
    if test "$with_logging" = "rlog" ; then
        enable_timing=all
    fi
fi
timing_name=$enable_timing
case "$enable_timing" in
    no)
    timing_name=none
    ;;
    time)
    collect_stats=true
    ;;
    log|log_detailed)
    logging_required=true
    ;;
    yes)
    timing_name=all
    collect_stats=true
    logging_required=true
    ;;
    all|runtime)
    collect_stats=true
    logging_required=true
    ;;
    none|default)
    timing_name=none
    ;;
    *)
    AC_MSG_WARN([Unknown value $enable_timing for enable-timing])
    enable_timing=no
    timing_name=none
    ;; 
esac
#
# The default logging package is rlog; you can get it by 
# specifying --with-logging or --with-logging=rlog
#
case $with_logging in 
    yes)
    logging_name=rlog
    ;;
    no|none)
    logging_name=none
    ;;
    default)
    if test "$logging_required" = "true" ; then
        logging_name=rlog
    else
        logging_name=none
    fi
    ;;
    *)
    logging_name=$with_logging
    ;;
esac
# 
# Include the selected logging subsystem
#
# Choices:
# 1) A subdir of src/util/logging
#     This directory must contain a configure which will be executed
#     to build the 
# 2) An external directory
#     This directory must contain 
#          a mpilogging.h file
#     It may contain 
#          a setup_logging script
#          a configure
#     
#   
logging_subsystems=
if test "$logging_name" != "none" ; then
    # Check for an external name (directory containing a /)
    hasSlash=`echo A$logging_name | sed -e 's%[[^/]]%%g'`
    if test -n "$hasSlash" ; then
        # Check that the external logging system is complete.
	# Any failure will cause configure to abort
        if test ! -d $logging_name ; then
	    AC_MSG_ERROR([External logging directory $logging_name not found.  Configure aborted])
	    logging_name=none
        elif test ! -s $logging_name/mpilogging.h ; then
	    AC_MSG_ERROR([External logging header $logging_name/mpilogging.h not found.  Configure aborted])
	    logging_name=none
        fi

        logdir=$logging_name
	# Force the logdir to be absolute
	logdir=`cd $logdir && pwd`
	# Switch name to "external" because that is how the MPICH2
	# code will know it
	logging_name=external
	# Add the dir to the include paths
	#CPPFLAGS="$CPPFLAGS -I$logdir"
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	CPPFLAGS="$CPPFLAGS -I$logdir"
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	EXTERNAL_SRC_DIRS="$EXTERNAL_SRC_DIRS $logdir"
	# Add to the list of external modules to setup
	if test -x $logdir/setup_logging ; then
	     EXTERNAL_SETUPS="$EXTERNAL_SETUPS $logdir/setup_logging"
	fi
    else
        logdir=$srcdir/src/util/logging
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        logreldir=src/util/logging/$logging_name
        logging_subsystems="$logging_subsystems $logreldir"
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        logging_subdirs=$logging_name
        for dir in $logging_subdirs ; do
            if test ! -d $logdir/$dir ; then
	        AC_MSG_ERROR([$logdir/$dir does not exist.  Configure aborted])
	        logging_name=none
            fi
        done
        for dir in $logging_subsystems ; do
            if test ! -x $srcdir/$dir/configure ; then
	        AC_MSG_ERROR([$logdir/$dir has no configure (required).  Configure aborted])
	        logging_name=none
            fi
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            other_install_dirs="${other_install_dirs} $logreldir"
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        done
    fi
fi
#
# FIXME: Logging doesn't necessarily require timing (e.g., simply logging the 
# sequence of routines).  
if test "$logging_name" != "none" ; then
    if test "$enable_timing" != "no" ; then
	if test "$enable_timing" = "default" -o "$enable_timing" = "none" ; then
	    enable_timing=log
	    timing_name=log
    	fi
	logging_dir=logging
	subsystems="$subsystems $logging_subsystems"
    else
	AC_MSG_WARN([Timing was disabled.  Logging has been disabled as well.])
	with_logging=no
	logging_name=none
        logging_dir=
        logging_subdirs=
    fi
else
    if test "$logging_required" = "true" ; then
	AC_MSG_WARN([Timing was enabled with log option but no logging library is available.  Timing has been disabled.])
	enable_timing=no
	timing_name=none
    fi
    logging_dir=
    logging_subdirs=
fi
if test "$timing_name" != "none" ; then
    timing_kind=`echo $timing_name | \
       tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
    timing_kind=MPID_TIMING_KIND_$timing_kind
    AC_DEFINE_UNQUOTED(HAVE_TIMING,$timing_kind,[define to enable timing collection])
    if test "$collect_stats" = "true" ; then
        AC_DEFINE(COLLECT_STATS,1,[define to enable collection of statistics])
    fi
fi
#
AC_SUBST(logging_dir)
AC_SUBST(logging_name)
AC_SUBST(logging_subdirs)
use_logging_variable="MPID_LOGGING_`echo $logging_name | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`"
AC_DEFINE_UNQUOTED(USE_LOGGING,$use_logging_variable,[define to choose logging library])
# ----------------------------------------------------------------------------
# End of logging tests
# ----------------------------------------------------------------------------

# ----------------------------------------------------------------------------
# Check to see if the device does not support spawn.  
# FIXME: This should provide the option of not building the dynamic
# process routines.  It could also allow us to specialize support
# for all processes are members of MPI_COMM_WORLD (only one comm_world).
# ----------------------------------------------------------------------------
if test "$MPID_NO_SPAWN" = yes ; then
    AC_MSG_WARN([The device $with_device does not support MPI dynamic process routines])   
fi

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PAC_CONFIG_SUBDIR(src/mpl,,AC_ERROR(MPL configure failed))
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PAC_PREPEND_FLAG([-lmpl], [WRAPPER_LIBS])
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PAC_APPEND_FLAG([-I${use_top_srcdir}/src/mpl/include], [CPPFLAGS])
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EXTERNAL_SRC_DIRS="$EXTERNAL_SRC_DIRS src/mpl"
other_install_dirs="$other_install_dirs src/mpl"
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# OpenPA
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AC_ARG_WITH([openpa-prefix],
            [AS_HELP_STRING([[--with-openpa-prefix[=DIR]]],
                            [use the OpenPA atomics library installed in DIR,
                             rather than the one included in src/openpa.  Pass
                             "embedded" to force usage of the OpenPA source
                             distributed with MPICH2.])],
            [],
            [# see if OPA is already installed on the system
             PAC_PUSH_FLAG([LIBS])
             PAC_PREPEND_FLAG([-lopa],[LIBS])
             AC_LINK_IFELSE([AC_LANG_PROGRAM([dnl
#include "opa_primitives.h"
],[
OPA_int_t i;
OPA_store_int(i,10);
OPA_fetch_and_incr_int(&i,5);
])dnl
                             ],
                            [with_openpa_prefix=system],[with_openpa_prefix=embedded])
             PAC_POP_FLAG([LIBS])
             ])
# @opadir@ is used in src/Makefile.sm to control whether or not the OPA in
# src/openpa is built and installed
opadir=""
AC_SUBST([opadir])

if test "$with_openpa_prefix" = "embedded" ; then
    if test -e "${use_top_srcdir}/src/openpa" ; then
        opadir="openpa"
        EXTERNAL_SRC_DIRS="$EXTERNAL_SRC_DIRS src/openpa"
        PAC_APPEND_FLAG([-I${use_top_srcdir}/src/openpa/src],[CPPFLAGS])
        PAC_APPEND_FLAG([-I${master_top_builddir}/src/openpa/src],[CPPFLAGS])

        # OPA defaults to "auto", but in MPICH2 we want "auto_allow_emulation" to
        # easily permit using channels like ch3:sock that don't care about atomics
        AC_ARG_WITH([atomic-primitives],
                    [AS_HELP_STRING([--with-atomic-primitives],
                                    [Force OPA to use a specific atomic primitives
                                     implementation.  See the src/openpa directory
                                     for more info.])],
                    [],[with_atomic_primitives=not_specified])
        opa_subdir_args=""
        if test "$with_atomic_primitives" = "not_specified" ; then
            opa_subdir_args="--with-atomic-primitives=auto_allow_emulation"
        fi
        PAC_CONFIG_SUBDIR_ARGS([src/openpa],[$opa_subdir_args],[],[AC_ERROR([OpenPA configure failed])])
        PAC_PREPEND_FLAG([-lopa],[WRAPPER_LIBS])

        other_install_dirs="$other_install_dirs src/openpa"
    else
        AC_MSG_WARN([Attempted to use the embedded OpenPA source tree in "src/openpa", but it is missing.  Configuration or compilation may fail later.])
1065
    fi
1066
elif test "$with_openpa_prefix" = "system" ; then
1067
    PAC_PREPEND_FLAG([-lopa],[WRAPPER_LIBS])
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
elif test "$with_openpa_prefix" = "no" ; then
    # The user doesn't want to use OPA.  This may or may not cause MPICH2 to
    # fail to configure/build, depending on many other factors.
    :
else
    # The user specified an already-installed OPA; just sanity check, don't
    # subconfigure it
    AS_IF([test -s "${with_openpa_prefix}/include/opa_primitives.h" -a -s "${with_openpa_prefix}/include/opa_config.h"],
          [:],[AC_MSG_ERROR([the OpenPA installation in "${with_openpa_prefix}" appears broken])])
    PAC_APPEND_FLAG([-I${with_openpa_prefix}/include],[CPPFLAGS])
    PAC_PREPEND_FLAG([-lopa],[WRAPPER_LIBS])
    if test -d ${with_openpa_prefix}/lib64 ; then
        PAC_APPEND_FLAG([-L${with_openpa_prefix}/lib64],[WRAPPER_LDFLAGS])
    fi
    PAC_APPEND_FLAG([-L${with_openpa_prefix}/lib],[WRAPPER_LDFLAGS])
1083
1084
fi

1085
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1102
1103
1104
1105
1106
# ----------------------------------------------------------------------------
# Threads
# ----------------------------------------------------------------------------
#
# Threads must be supported by the device.  First, set the default to
# be the highest supported by the device
if test "$enable_threads" = default ; then
    if test -n "$MPID_MAX_THREAD_LEVEL" ; then
        case $MPID_MAX_THREAD_LEVEL in
            MPI_THREAD_SINGLE)     enable_threads=single ;;
            MPI_THREAD_FUNNELED)   enable_threads=funneled ;;
            MPI_THREAD_SERIALIZED) enable_threads=serialized ;;
            MPI_THREAD_MULTIPLE)   enable_threads=runtime ;;
            *) AC_MSG_ERROR([Unrecognized thread level from device $MPID_MAX_THREAD_LEVEL])
    	    ;;
        esac
    else
        enable_threads=single
    fi
fi

if test "$enable_threads" = "yes" ; then 
1107
    enable_threads=multiple
1108
1109
1110
elif test "$enable_threads" = "no" ; then
    enable_threads=single
elif test "$enable_threads" = "default"; then
1111
    if test "$with_device" = "default" -o "$with_device" = "ch3:sock" ; then
1112
1113
1114
        enable_threads=runtime
    fi
fi
1115

1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
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1129
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1171
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1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
# Runtime is an alias for multiple with an additional value
if test "$enable_threads" = "runtime" ; then
    AC_DEFINE(HAVE_RUNTIME_THREADCHECK,1,[Define if MPI supports MPI_THREAD_MULTIPLE with a runtime check for thread level])
    enable_threads=multiple
fi

MPICH_THREAD_LEVEL=MPI_THREAD_FUNNELED
case "$enable_threads" in 
    single)
    thread_pkg_required=no
    MPICH_THREAD_LEVEL=MPI_THREAD_SINGLE
    ;;
    funneled)
    thread_pkg_required=no
    MPICH_THREAD_LEVEL=MPI_THREAD_FUNNELED
    ;;
    serialized)
    # FIXME: Why does serialized require a thread package?
    thread_pkg_required=yes
    MPICH_THREAD_LEVEL=MPI_THREAD_SERIALIZED
    ;;
    multiple)
    thread_pkg_required=yes
    MPICH_THREAD_LEVEL=MPI_THREAD_MULTIPLE
    ;;
    *)
    AC_MSG_ERROR(["$enable_threads" is not a valid value for --enable-threads])     
    ;;
esac
# Check that the requested thread level is available.
threadLevelOK=yes
if test -z "$MPID_MAX_THREAD_LEVEL" ; then
    if test "$MPICH_THREAD_LEVEL" = "MPI_THREAD_MULTIPLE" -o "$MPICH_THREAD_LEVEL" = "MPI_THREAD_SERIALIZED" ; then
        threadLevelOK=no
    fi
else
    # Check that MPID_MAX_THREAD_LEVEL is at least as large as the
    # selected MPICH_THREAD_LEVEL
    case $MPICH_THREAD_LEVEL in 
        MPI_THREAD_MULTIPLE)
	if test "$MPID_MAX_THREAD_LEVEL" != "MPI_THREAD_MULTIPLE" ; then
	    threadLevelOK=no
        fi
	;;
	MPI_THREAD_SERIALIZED)
	if test "$MPID_MAX_THREAD_LEVEL" != "MPI_THREAD_MULTIPLE" -a \
	        "$MPID_MAX_THREAD_LEVEL" != "MPI_THREAD_SERIALIZED" ; then
            threadLevelOK=no
        fi
	;;
	MPI_THREAD_FUNNELED)
        if test "$MPID_MAX_THREAD_LEVEL" = "MPI_THREAD_SINGLE" ; then
            threadLevelOK=no
        fi
	;;
	MPI_THREAD_SINGLE)
	;;
    esac
fi
if test "$threadLevelOK" != yes ; then
   AC_MSG_ERROR([The device $with_device does not support $MPICH_THREAD_LEVEL])
fi

export MPICH_THREAD_LEVEL
AC_DEFINE_UNQUOTED(MPICH_THREAD_LEVEL,$MPICH_THREAD_LEVEL,[Level of thread support selected at compile time])

if test "$thread_pkg_required" = "no" ; then
1183
    MPIU_THREAD_DEFAULT=${MPIU_THREAD_DEFAULT:-none}
1184
fi
1185
export MPIU_THREAD_DEFAULT
1186

1187
# Check for value thread_cs choice; set the refcount default if necessary
1188
1189
thread_granularity=MPIU_THREAD_GRANULARITY_SINGLE
thread_refcount=MPIU_REFCOUNT_NONE
1190
1191
1192
1193
1194
1195
1196
if test "$enable_threads" = "multiple" ; then
    case $enable_thread_cs in 
    global)
    thread_granularity=MPIU_THREAD_GRANULARITY_GLOBAL
    if test "$enable_refcount" = "default" ; then enable_refcount=none ; fi
    ;;
    brief-global|brief_global)
1197
    AC_MSG_ERROR([--enable-thread-cs=brief-global is no longer supported, please select a different granularity])
1198
1199
1200
1201
1202
1203
1204
1205
    ;;
    per-object|per_object)
    thread_granularity=MPIU_THREAD_GRANULARITY_PER_OBJECT
    if test "$enable_refcount" = "default" ; then enable_refcount=lock ; fi
    ;;
    lock-free|lock_free|lockfree)
    thread_granularity=MPIU_THREAD_GRANULARITY_LOCK_FREE
    if test "$enable_refcount" = "default" ; then enable_refcount=lock-free ; fi
1206
    if test "$enable_predefined_refcount" = "default" ; then enable_predefined_refcount=no ; fi
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
    ;;
    *)
    AC_MSG_ERROR([Unrecognized value $enable_thread_cs for --enable-thread-cs])
    ;;
    esac

    case $enable_refcount in
    lock)
    thread_refcount=MPIU_REFCOUNT_LOCK
    ;;
    lock-free|lock_free|lockfree)
    thread_refcount=MPIU_REFCOUNT_LOCKFREE
    ;;
    none)
    thread_refcount=MPIU_REFCOUNT_NONE
    ;;
    *)
    AC_MSG_ERROR([Unrecognized value $enable_refcount for --enable-refcount])
    ;;
    esac
fi
AC_DEFINE_UNQUOTED([MPIU_THREAD_GRANULARITY],$thread_granularity,[Method used to implement atomic updates and access])

1230
1231
1232
1233
if test "$enable_predefined_refcount" = "no" ; then
    AC_DEFINE([MPIU_THREAD_SUPPRESS_PREDEFINED_REFCOUNTS],[1],[define to disable reference counting predefined objects like MPI_COMM_WORLD])
fi

1234
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1236
1237
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1239
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1243
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1246
1247
1248
1249
case $enable_handle_allocation in
    mutex|default)
        handle_allocation_method=MPIU_HANDLE_ALLOCATION_MUTEX
    ;;
    tls)
        handle_allocation_method=MPIU_HANDLE_ALLOCATION_THREAD_LOCAL
    ;;
    *)
        AC_MSG_ERROR([Unrecognized value $enable_handle_allocation for --enable-handle-allocation])
    ;;
esac
AC_DEFINE_UNQUOTED([MPIU_HANDLE_ALLOCATION_METHOD],$handle_allocation_method,[Method used to allocate MPI object handles])


AC_DEFINE_UNQUOTED([MPIU_THREAD_REFCOUNT],$thread_refcount,[Method used to implement refcount updates])

1250
1251
1252
1253
1254
1255
1256
# enable-g
# strip off multiple options, separated by commas
save_IFS="$IFS"
IFS=","
for option in $enable_g ; do
    case "$option" in 
        debug|dbg)
1257
        enable_append_g=yes
1258
1259
1260
	;;
        no|none)
	;;
1261
1262
1263
	handlealloc)
	perform_handlealloc=yes
	;;
1264
1265
1266
	handle)
	AC_DEFINE(MPICH_DEBUG_HANDLES,1,[Define to enable handle checking])
	;;
1267
1268
1269
	instr)
	perform_instr=yes
	;;
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
	meminit)
	perform_meminit=yes
	;;
	memarena)
	perform_memarena=yes
	perform_memtracing=yes
	;;
	mem)
	perform_memtracing=yes
	;;
	log)
	perform_dbglog=yes
	;;
	mutex)
	perform_dbgmutex=yes
	;;
1286
1287
1288
	mutexnesting)
	perform_mutexnesting=yes
	;;
1289
1290
1291
	all|yes)
	perform_memtracing=yes
	perform_dbglog=yes
1292
	enable_append_g=yes
1293
	perform_meminit=yes
1294
	perform_instr=yes
1295
	perform_dbgmutex=yes
1296
	perform_mutexnesting=yes
1297
	perform_handlealloc=yes
1298
1299
	;;
	*)
1300
1301
1302
	IFS=$save_IFS
	AC_MSG_WARN([Unknown value $option for enable-g])
	IFS=","
1303
1304
1305
1306
	;;
    esac
done
IFS="$save_IFS"
1307
1308
1309
1310
1311

if test "$enable_append_g" = "yes" ; then
    CFLAGS="$CFLAGS -g"
    CXXFLAGS="$CXXFLAGS -g"
    FFLAGS="$FFLAGS -g"
1312
    FCFLAGS="$FCFLAGS -g"
1313
1314
fi
if test "$enable_append_ndebug" = "yes" ; then
1315
1316
1317
1318
    CFLAGS="$CFLAGS -DNDEBUG -DNVALGRIND"
    CXXFLAGS="$CXXFLAGS -DNDEBUG -DNVALGRIND"
    FFLAGS="$FFLAGS -DNDEBUG -DNVALGRIND"
    FCFLAGS="$FCFLAGS -DNDEBUG -DNVALGRIND"
1319
fi
1320
1321
1322
if test -n "$perform_meminit" ; then
    AC_DEFINE(MPICH_DEBUG_MEMINIT,1,[Define to enable preinitialization of memory used by structures and unions])
fi
1323
if test "$perform_handlealloc" = yes ; then
1324
1325
1326
1327
    AC_DEFINE(MPICH_DEBUG_HANDLEALLOC,1,[Define to enable checking of handles still allocated at MPI_Finalize])
fi
if test "$perform_instr" = yes ; then
    AC_DEFINE(USE_MPIU_INSTR,1,[Define this to enable internal instrumentation] )
1328
1329
fi

1330
1331
1332
1333
1334
1335
1336
if test -n "$perform_memtracing" ; then
    enable_g_mem=yes
    AC_DEFINE(USE_MEMORY_TRACING,1,[Define to enable memory tracing])
    if test -n "$perform_memarena" ; then
        AC_DEFINE(MPICH_DEBUG_MEMARENA,1,[Define if each function exit should confirm memory arena correctness])
    fi
fi
1337
1338
1339
if test -n "$perform_mutexnesting" ; then 
    AC_DEFINE(MPICH_DEBUG_MUTEXNESTING,1,[Define to check nesting in mutexes])
fi
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
if test -n "$perform_dbglog" ; then
   if test "$with_logging" != "none" ; then
       AC_MSG_WARN([--with-logging overrides --enable-g=log])
   else
       AC_DEFINE(USE_DBG_LOGGING,1,[Define to enable logging macros])
   fi
fi

if test -n "$perform_dbgmutex" ; then 
   AC_DEFINE(MPICH_DEBUG_MUTEX,1,[Define to enable mutex debugging])
fi

pac_cross_compiling=no
if test "$with_cross" != "no" ; then
    if test -s "$with_cross" ; then
        AC_MSG_RESULT([Reading values from cross-compilation file $with_cross])
        . $with_cross
	# Autoconf 2.52 no longer sets cross_compiling except with the
	# awkward "targethost" options.
	pac_cross_compiling=yes
	cross_compiling=yes
	ac_cv_prog_cc_cross=yes
	ac_cv_prog_f77_cross=yes
1363
 	ac_cv_prog_fc_cross=yes
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
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1385
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1387
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1390
1391
1392
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1394
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1398
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1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
        ac_cv_prog_cxx_cross=yes
        export cross_compiling
	# Export all cross variables.  Any subsidiary configure should also
        # export CROSS_xxx
	rm -f confcross
	(set) 2>&1 | grep CROSS_ | \
	      sed -e 's/^/export /g' -e 's/=.*//g' > confcross
	. confcross
	rm -f confcross      
    fi
fi

if test "$enable_nmpi_as_mpi" = yes ; then
   AC_DEFINE(USE_MPI_FOR_NMPI,1,[Define if the NMPI names should use MPI instead of PMPI])
fi

# This goes here because we need the top_srcdir
if test "$enable_romio" = "yes" ; then
   if test -d $use_top_srcdir/src/mpi/romio ; then
       subsystems="$subsystems src/mpi/romio"
       AC_DEFINE(HAVE_ROMIO,1,[Define if ROMIO is enabled])
       # Set environment variables that the romio configure expects
       romio_dir=romio
       AC_SUBST(romio_dir)
       export use_top_srcdir
       top_build_dir=`pwd`
       export top_build_dir
       # if there is no $top_build_dir/lib, romio puts lib in wrong place
       # This test used -e under Linux, but not all test programs understand
       # -e
       if test ! -d lib ; then mkdir lib ; fi
       # tell mpi.h to include mpio.h
       PAC_HAVE_ROMIO
   else
       AC_MSG_WARN([ROMIO src directory is not available])
   fi
fi
#
# FIXME: If an external device, don't necessarily complain (e.g.,
# if the device is already built)
if test ! -d $devicedir ; then
dnl     WAIT UNTIL WE INCLUDE A DEVICE
dnl     AC_MSG_ERROR([Device $device_name is unknown)]
    AC_MSG_WARN([Device $device_name is unknown])
elif test ! -x $devicedir/configure ; then
    if test -s $devicedir/configure ; then
        AC_MSG_WARN([The configure in $devicedir exists but is not executable])
    else
        AC_MSG_WARN([Device $device_name has no configure])
    fi
    device_name=""
else 
    # Add the device to the configure list
    devsubsystems="$devsubsystems $devicereldir"
    # Make device_name available to subdirs
fi
1420
1421
1422
1423
1424
1425
#
# Allow the device to request that the install step invoke the install 
# target in the device's Makefile.
if test -n "$device_name" -a "$INSTALL_FROM_DEVICE" = yes ; then
    other_install_dirs="${other_install_dirs} $devicereldir"
fi
1426
1427
1428
AC_SUBST(device_name)
#
# with-pm
1429
1430
1431
1432
if test "$with_pm" = "none" ; then
    # add "none" as synonym for "no" to agree with older erroneous docs
    with_pm="no"
fi
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
if test "$MPID_NO_PM" = yes ; then
    if test "$with_pm" != "default" -a "$with_pm" != no ; then
        AC_MSG_ERROR([The PM chosen ($with_pm) is is not valid for the selected device ($with_device)])
    fi
    # This is used to change with_pm=default to with_pm=no in the case
    # where the device does not want a PM
    with_pm=no
fi
if test -z "$with_pm" ; then
    with_pm="no"
fi
if test "$with_pmi" = "uni" -a "$with_pm" = "default" ; then
    with_pm="no"
fi
if test "$with_pm" = "default" -o "$with_pm" = "yes" ; then
1448
    with_pm=hydra
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
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1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
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1482
1483
1484
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1488
1489
1490
1491
1492
1493
1494
1495
1496
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1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
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1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
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1543
1544
1545
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1547
1548
1549
1550
1551
1552
1553
1554
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1557
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1561
1562
1563
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1566
1567
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1577
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1581
1582
1583
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1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
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1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
fi

# We allow multiple pm names, separated by : or ,
# If multiple PMs are provided, we set the value MANY_PM to yes
MANY_PM=no
AC_SUBST(MANY_PM)
if test "$with_pm" != "no" ; then
    pm_names="`echo $with_pm | sed -e 's/:/ /g' -e 's/,/ /g'`"
else
    pm_names=""
fi
#
hasError=no
# We need to be careful about PM's that have either conflicting 
# requirements (e.g., different PMI implementations) or different
# optional features (e.g., MPID_PM_NAMESERVER).
# In addition, we need to interleave the setup of the PMI and PM
# modules.  The order is as follows:
#
# For each PM, execute the mpich2prereq script for that pm (if present).  
# This script provides information about the PM, including which PMI
# implementations are supported.
# 
# Then, for the selected PMI, the setup script (if any) is run.  This is
# necessary because the setup of the PM may require information discovered
# or provided duing the PMI setup step (e.g., smpd requires this)
#
# Finally, for each PM, the setup script is executed.
# 
# Step 1: invoke the mpich2prereq for each PM
for pm_name in $pm_names ; do
    if test -z "$first_pm_name" ; then
       first_pm_name=$pm_name
    else 
       # Only add to other_pm_names if the directory exists,
       # since the Makefile in src/pm/Makefile will try to cd to
       # that directory
       if test -d $use_top_srcdir/src/pm/$pm_name ; then
           other_pm_names="$other_pm_names $pm_name"
       fi
    fi
    if test ! -d $use_top_srcdir/src/pm/$pm_name ; then
        AC_MSG_WARN([$use_top_srcdir/src/pm/$pm_name does not exist. PM is unknown])
	hasError=yes
    elif test ! -x $use_top_srcdir/src/pm/$pm_name/configure ; then
        if test -s $use_top_srcdir/src/pm/$pm_name/configure ; then
	    AC_MSG_WARN([The configure in $use_top_srcdir/src/pm/$pm_name exists but is not executable])
        else
            AC_MSG_WARN([pm $pm_name has no configure])
        fi
        pm_name=""
	hasError=yes
    else
	nameserver=$MPID_PM_NAMESERVER
        if test -f $use_top_srcdir/src/pm/$pm_name/mpich2prereq ; then 
	    echo sourcing $use_top_srcdir/src/pm/$pm_name/mpich2prereq
	    . $use_top_srcdir/src/pm/$pm_name/mpich2prereq
	fi
	# Check for a change; if found, we'll take the default
	if test "$MPID_PM_NAMESERVER" != "$nameserver" ; then
            if test "$first_pm_name" != "$pm_name" ; then
	        # Reject suggestion (use the default, common mode)
		MPID_PM_NAMESERVER=""
	    fi
	fi
    fi
done
if test "$hasError" != no ; then
    AC_MSG_ERROR([Aborting configure because an error was seen in the selection of process managers])
fi
#
# pm_name is the *primary* pm
pm_name=$first_pm_name
AC_SUBST(pm_name)
AC_SUBST(other_pm_names)

# Some versions of PM and PMI require a special definition (currently, only
# smpd requires this)
if test "$PMI_REQUIRES_READABLE_TOKENS" = "yes" ; then
    AC_DEFINE(USE_HUMAN_READABLE_TOKENS,1,[Define to use ='s and spaces in the string utilities.])
fi

if test -n "$first_pm_name" ; then
    other_install_dirs="${other_install_dirs} src/pm/$first_pm_name"
fi
# Step 2:
# Once we've selected the process manager (or managers), we can
# check that we have a compatible PMI implemenatation.
# with-pmi
if test "$MPID_NO_PMI" = yes ; then
    if test "$with_pmi" != "default" -a "$with_pmi" != no ; then
        AC_MSG_ERROR([The PMI chosen ($with_pmi) is is not valid for the selected device ($with_device)])
    fi
    # This is used to change with_pmi=default to with_pmi=no in the case
    # where the device does not want a PMI
    with_pmi=no
elif test "$with_pmi" != "no" ; then
    if test "$with_pmi" = "default" -o "$with_pmi" = "yes" ; then
        if test -n "$PM_REQUIRES_PMI" ; then
	    with_pmi=$PM_REQUIRES_PMI
        else
            with_pmi=simple
        fi
    elif test -n "$PM_REQUIRES_PMI" ; then
        # Test for compatibility between pm and pmi choices
        if test "$PM_REQUIRES_PMI" != "$with_pmi" ; then
	    AC_MSG_ERROR([The PM chosen ($with_pm) requires the PMI implementation $PM_REQUIRES_PMI but $with_pmi was selected as the PMI implementation.])
        fi
    fi
    pmi_name=$with_pmi
    
    if test ! -d $use_top_srcdir/src/pmi/$pmi_name ; then
        AC_MSG_WARN([$use_top_srcdir/src/pmi/$pmi_name does not exist. PMI is unknown])
    elif test ! -x $use_top_srcdir/src/pmi/$pmi_name/configure ; then
        AC_MSG_WARN([pmi $pmi_name has no configure or Makefile])
        pmi_name=""
    else
        subsystems="$subsystems src/pmi/$pmi_name"
    fi
else
    AC_MSG_ERROR([A PMI implementation must be selected or the default used.])
fi
AC_SUBST(pmi_name)

# Step 3: complete pm setup.
# Note that checks for errors have already been performed, so this
# loop does not need to perform any extra error checks.
# Note that this uses this_pm_name because pm_name must be the *first*
# of the PM names
for this_pm_name in $pm_names ; do
    subsystems="$subsystems src/pm/$this_pm_name"
    if test -f $use_top_srcdir/src/pm/$this_pm_name/setup_pm ; then 
	echo sourcing $use_top_srcdir/src/pm/$this_pm_name/setup_pm
	. $use_top_srcdir/src/pm/$this_pm_name/setup_pm
    fi
done

# ----------------------------------------------------------------------------
if test $with_mpe != no ; then
    if test ! -d $use_top_srcdir/src/mpe2 ; then
        if test $with_mpe = yes ; then
	    # No warning message on the default
            AC_MSG_WARN([No MPE directory available])
        fi
    elif test ! -x $use_top_srcdir/src/mpe2/configure ; then
        if test $with_mpe = yes ; then
	    # No warning message on the default
            AC_MSG_WARN([No configure available for MPE])
        fi
    else
        subsystems="$subsystems src/mpe2"
	other_install_dirs="$other_install_dirs src/mpe2"
	mpe_dir=mpe2
	# Temporarily replace the default NONE value for exec_prefix
	# and prefix with the actual, default values.
	savePrefix=$prefix
	saveExecprefix=$exec_prefix
	test "x$prefix" = xNONE && prefix=$ac_default_prefix
	test "x$exec_prefix" = xNONE && exec_prefix=$prefix
	eval actualbindir=$bindir
	# MPI_CC and MPIF77 must use the local (build) bin dir, not
	# the installation bin dir
	#MPI_CC=$actualbindir/mpicc
	#MPI_F77=$actualbindir/mpif77
	#eval actuallibdir=$libdir
	#MPI_LIBS="-L$actuallibdir -lmpich -lpmpich"
	buildbindir=`pwd`/bin
	MPI_CC=$buildbindir/mpicc
	MPI_F77=$buildbindir/mpif77
	prefix=$savePrefix
	exec_prefix=$saveExecprefix
	# NOTE: You must append LIBS to MPI_LIBS before invoking the mpe
	# configure
	export MPI_CC
	export MPI_F77
	#export MPI_LIBS
        export use_top_srcdir
        top_build_dir=`pwd`
        export top_build_dir
    fi
fi
AC_SUBST(mpe_dir)
AC_SUBST(other_install_dirs)

# Check whether shared libraries are enabled.  We need to know this
# before we start chosing the Fortran, Fortran 90, and C++ compilers
ENABLE_SHLIB=$enable_sharedlibs
if test -z "$ENABLE_SHLIB" -o "$ENABLE_SHLIB" = "no" ; then
    ENABLE_SHLIB=none
fi
# We need the script that is used to create shared libraries if either
# we are creating shared libraries for MPICH2 or we are creating the
# dynamically loadable library for the debugger interface
CREATESHLIB=false
if test "$ENABLE_SHLIB" != "none" -o "$enable_debuginfo" != "no" ; then
   CREATESHLIB=`pwd`/src/util/createshlib
fi
AC_SUBST(CREATESHLIB)
1647

1648
1649
1650
1651
1652
1653
1654
1655
# Check for whether the compiler defines a symbol that contains the 
# function name.  The MPICH2 code, for greater portability, defines
# its own symbols, FCNAME (a string) and FUNCNAME (a token that is not a 
# string).  Code should use these symbols where possible.  However, 
# some debugging macros may want to use a compiler-provided symbol
# for the function name, and this check makes it possible to 
# define such macros in a way that is always correct.
PAC_CC_FUNCTION_NAME_SYMBOL
1656
1657
1658
1659

# Check if $MPI_DEFAULT_COPTS is valid with $CC
if test "$enable_default_optimize" = "yes" \
     -a -n "$MPI_DEFAULT_COPTS" ; then
1660
1661
    if test "$enable_check_compiler_flags" = "yes" ; then
        PAC_C_CHECK_COMPILER_OPTION( [$MPI_DEFAULT_COPTS], [
1662
        CFLAGS="$CFLAGS $MPI_DEFAULT_COPTS"
1663
1664
1665
1666
                                   ] )
    else
        CFLAGS="$CFLAGS $MPI_DEFAULT_COPTS"
    fi
1667
1668
fi

1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
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1688
1689
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1698
# Check for support for weak symbols.  If not found, set NO_WEAK_SYM
# to the Make target name understood by simplemake.
# Set NEEDSPLIB to yes if link commands need both -l$MPILIBNAME
# and -lp$MPILIBNAME.
NEEDSPLIB=yes
NO_WEAK_SYM_TARGET=build_proflib
if test $enable_weak_symbols = yes ; then
    # Turn off weak symbols if they aren't available
    PAC_PROG_C_WEAK_SYMBOLS(,enable_weak_symbols=no)
fi
if test $enable_weak_symbols = "yes" ; then
    AC_DEFINE(USE_WEAK_SYMBOLS,1,[Define if weak symbols should be used])
    NEEDSPLIB=no
    # Check for the ability to support multiple weak symbols
    if test "$pac_cv_prog_c_weak_symbols" = "pragma weak" ; then
       PAC_PROG_C_MULTIPLE_WEAK_SYMBOLS(AC_DEFINE(HAVE_MULTIPLE_PRAGMA_WEAK,1,[Define if multiple weak symbols may be defined]))
    fi
else
    NO_WEAK_SYM=build_proflib
    PROFILE_DEF_MPI="-DMPICH_MPI_FROM_PMPI"
fi
export NEEDSPLIB
export NO_WEAK_SYM
export NO_WEAK_SYM_TARGET
export PROFILE_DEF_MPI
AC_SUBST(NEEDSPLIB)
AC_SUBST(NO_WEAK_SYM)
AC_SUBST(NO_WEAK_SYM_TARGET)
AC_SUBST(PROFILE_DEF_MPI)

1699
# ---------------------------------------------------------------------------
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
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1711
1712
1713
1714
1715
1716
1717
1718
# Support for the language bindings: Fortran 77, Fortran 90, and C++
#
# First, we handle the case of no explicit enable/disable option.  In that
# case, we look for a usable compiler.  We cannot use the ac macros for this
# because they abort the configure step if they fail to find a compiler 
# (earlier versions of autoconf did not have this behavior!).
#
# Second, we perform the langugage-specific tests, if necessary.  This may
# be relatively simple (C++) or complex (Fortran 77, including formation of 
# the encoded MPI handles).
#
# Note that the bindings support needs to know some of the properties of
# the C compiler, so those tests (particularly for weak symbols)
# must come first.
# ----------------------------------------------------------------------------

#
# First, determine whether we are/can support the language bindings
#
1719
1720
1721
1722
1723
1724
# Since F90/F90FLAGS are replaced by FC/FCFLAGS, rather than silently
# substituting them, i.e. FC=$F90 and FCFLAGS=$F90FLAGS, we choose to emit
# an error message and abort to avoid any ambiguous/hidden bug in choosing
# Fortran90 compilers.
if test -n "$F90" -o -n "$F90FLAGS" ; then
    AC_MSG_ERROR([F90 and F90FLAGS are replaced by FC and FCFLAGS respectively in this configure, please unset F90/F90FLAGS and set FC/FCFLAGS instead and rerun configure again.])
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
fi
# ----------------------------------------------------------------------------
# Handle default choices for the Fortran compilers
if test "$enable_f77" = "default" ; then
    enable_f77=no
    # Check for a Fortran compiler
    # Warning: the PROG_F77 command aborts if it fails to 
    # find a compiler.  We should first try to find a compiler, then
    # check to see if it works (which the PROG_F77 command does as well)
    # It also prefers g77 to f77, and doesn't know about other compilers
    # Also handle the bug that autoconf sets FFLAGS for you
1736
    PAC_PROG_F77
1737
1738
1739
1740
1741
    if test -n "$F77" ; then 
        enable_f77_wasdefault=yes
        enable_f77=yes
    fi
elif test "$enable_f77" = "yes" ; then
1742
    PAC_PROG_F77
1743
1744
fi

1745
1746
1747
1748
1749
1750
1751
1752
1753
if test "$enable_f77" = "yes" -a "$F77" = "" ; then
   # No Fortran 77 compiler found; abort
   AC_MSG_ERROR([No Fortran 77 compiler found. If you don't need to
   build any Fortran programs, you can disable Fortran support using
   --disable-f77 and --disable-fc. If you do want to build Fortran
   programs, you need to install a Fortran compiler such as gfortran
   or ifort before you can proceed.])
fi

1754
if test "$enable_f77" = yes ; then
1755
1756
1757
    # Check if $MPI_DEFAULT_FOPTS is valid with $F77
    if test "$enable_default_optimize" = "yes" \
         -a -n "$MPI_DEFAULT_FOPTS" ; then
1758
1759
        if test "$enable_check_compiler_flags" = "yes" ; then
            PAC_F77_CHECK_COMPILER_OPTION( [$MPI_DEFAULT_FOPTS], [
1760
            FFLAGS="$FFLAGS $MPI_DEFAULT_FOPTS"
1761
1762
1763
1764
                                         ] )
        else
            FFLAGS="$FFLAGS $MPI_DEFAULT_FOPTS"
        fi
1765
1766
1767
1768
    fi
fi

#
1769
# We need to know the name mangling for Fortran before testing for FC
1770
1771
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1775
1776
1777
1778
1779
1780
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1783
# compatibility (we need this because of the way we decide to generate
# the Fortran 77 bindings)
if test "$enable_f77" = yes ; then
    FLIBS_save="$FLIBS"
    FLIBS=""
    AC_F77_LIBRARY_LDFLAGS
    # The autoconf macro for finding FLIBS sometimes makes mistakes
    # (particularly with the Fujitsu frt compiler).  This next step
    # first sees if the FLIBS is valid with the Fortran compiler
    PAC_PROG_F77_FLIBS_VALID
    # Now see if FLIBS works with the C compiler
    PAC_PROG_F77_CHECK_FLIBS

    PAC_PROG_F77_LINKER_WITH_C
1784
    PAC_PROG_F77_OBJ_LINKS_WITH_C
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
    # For name mangle, we need the library flags
    PAC_PROG_F77_NAME_MANGLE
    # Check whether additional libraries are needed when linking with C
    PAC_PROG_F77_AND_C_STDIO_LIBS
    AC_SUBST(F77_OTHER_LIBS)

    # Warn about mixed name mangling, since many of the tests will fail
    if test "$pac_cv_prog_f77_name_mangle" = "mixed" ; then
        AC_MSG_WARN([The compiler $F77 uses mixed case names.  Fortran is monocase
and many Fortran programs may use either upper or lower case names for MPI
calls.  Consider specifying a particular parameter to your Fortran compiler
to select either upper or lower case names.  For the Absoft compiler, 
-f selects lower case and -N109 selects upper case (if you use -f, also use 
-B108 to enable the iargc and getarg routines, which are needed for some
tests and by many user programs).  Specify new command
line options by setting the environment variable FFLAGS to include
the options (e.g., setenv FFLAGS "-f -B108").  In addition, make sure that your
Fortran 90 compiler uses a compatible naming choice.  For the 
Absoft Fortran 90, -YALL_NAMES=LCS selects lower case names and -B108 
adds underscores to names, as required for iargc and getarg.  Pass this
1805
information to configure with the FCFLAGS environment variable.])
1806
1807
1808
1809
1810
1811
        # If Fortran implicitly enabled, disable it now.  Otherwise,
	# abort the configure since warning messages are often lost in
	# the output.
	if test "$enable_f77_wasdefault" = yes ; then
	    AC_MSG_WARN([Turning off Fortran support because of mixed case names])
	    enable_f77=no
1812
	    enable_fc=no
1813
1814
1815
1816
	else
	    AC_MSG_ERROR([Aborting configure because of mixed case names in Fortran.  Either select --disable-f77 or set FFLAGS to force the compiler to select monocase names])
	fi
    fi
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
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1836
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1877
1878
1879
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1883
1884
1885

    # The MPI standard requires that MPI_Init in any language initialize
    # MPI in all languages.  This can be a problem when objects produced 
    # by the Fortran compiler require symbols from the Fortran runtime
    # (making linking C-only programs unnecessarily difficult).  What we test 
    # here is whether the much more restricted needs of the Fortran 
    # initialize can be met with no special use of the Fortran runtime
    pac_f_init_works_with_c=unknown
    AC_MSG_CHECKING([whether Fortran init will work with C])
    rm -f conftest*
    cat > conftestc.c <<EOF
#include <stdio.h>
#include "confdefs.h"
#ifdef F77_NAME_UPPER
#define minit_ MINIT
#elif defined(F77_NAME_LOWER) || defined(F77_NAME_MIXED)
#define minit_ minit
#endif
int main( int argc, char *argv )
{
    minit_();
    return 0;
}
char *v1 = 0;
char *vc2 = 0;
int  v2 = 0;
minitc_( char *dv1, int d, char *dv2, int d2, int dv3 )
{
v1 = dv1;
v2 = dv3;
vc2 = dv2;
*vc2 = ' ';
}
EOF
    cat > conftestf.f <<EOF
       subroutine minit()
       common /m1/ vc, vc2
       character *1 vc(1,1), vc2(1)
       common /m2/ vd
       integer vd
       save /m1/, /m2/
       call minitc( vc, vc2, vd )
       end
EOF
   myfcompile='${F77-f77} -c $FFLAGS conftestf.f 1>&AC_FD_CC'
   myccompile='${CC-cc} -c $CFLAGS conftestc.c 1>&AC_FD_CC'
   if AC_TRY_EVAL(myfcompile) && test -s conftestf.o ; then
       :
   else 
	echo "configure: failed program was:" >&AC_FD_CC
        cat conftestf.f >&AC_FD_CC
   fi
   if AC_TRY_EVAL(myccompile) && test -s conftestc.o ; then
       :
   else 
	echo "configure: failed program was:" >&AC_FD_CC
        cat conftestc.c >&AC_FD_CC
   fi
   # Now try the link step
   myclink='${CC-cc} $CFLAGS -o conftest conftestc.o conftestf.o $LDFLAGS >conftest.out 2>&1'
   if AC_TRY_EVAL(myclink) && test -x conftest${ac_exeext} ; then
      pac_f_init_works_with_c=yes
   else
      pac_f_init_works_with_c=no
   fi
   AC_MSG_RESULT($pac_f_init_works_with_c)
   if test "$pac_f_init_works_with_c" = "yes" ; then
       AC_DEFINE(HAVE_MPI_F_INIT_WORKS_WITH_C,1,[Define if the Fortran init code for MPI works from C programs without special libraries])
   fi
1886
1887
fi

1888
# FC requires F77 as well.  If the user disabled f77, do not run the
1889
# next test; instead, drop into the warning message
1890
1891
1892
# Set a default value for fc works with f77.  This value is
# set to no *only* if fc was selected but was not compatible with f77
fc_with_f77=yes
1893
if test "$enable_fc" = "yes" -a "$enable_f77" = yes ; then
1894
    enable_fc=no
1895
    # Check for a Fortran compiler.  Work around bug in autoconf that 
1896
1897
1898
1899
1900
    # adds -g to FCFLAGS
    saveFCFLAGS="$FCFLAGS"
    PAC_PROG_FC
    FCFLAGS=$saveFCFLAGS
    if test -n "$FC" ; then 
1901
        if test -z "$F77" ; then
1902
	    PAC_PROG_F77
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
	fi
	#
	# If we allow multiple weak symbols, we should test a name
	# that does not contain an underscore.  The Fortran binding uses
	# this rule for enabling multiple weak symbols:
	# if defined(USE_WEAK_SYMBOLS) && !defined(USE_ONLY_MPI_NAMES) &&
	#    defined(HAVE_MULTIPLE_PRAGMA_WEAK) && 
	#    defined(F77_NAME_LOWER_2USCORE)
	# 
	testRoutine="t1_2"
	if test "$pac_cv_prog_c_multiple_weak_symbols" = "yes" -a \
               "$enable_weak_symbols" = "yes" -a \
	       "$pac_cv_prog_f77_name_mangle" = "lower doubleunderscore" ; then
	    testRoutine="t12"
        fi
1918
1919
1920
1921
1922
        PAC_FC_AND_F77_COMPATIBLE(fc_with_f77=yes,fc_with_f77=no,$testRoutine)
        if test "$fc_with_f77" != yes ; then
	    enable_fc=no
	    AC_MSG_WARN([The selected Fortran 90 compiler $FC does not work with the selected Fortran 77 compiler $F77.  Use the environment variables FC and F77 respectively to select compatible Fortran compilers.  The check here tests to see if a main program compiled with the Fortran 90 compiler can link with a subroutine compiled with the Fortran 77 compiler.])
        elif test "$fc_with_f77" = "yes" ; then
1923
            # If we got here, there is a Fortran 90 compiler that we can use
1924
            enable_fc=yes
1925
        fi
1926
1927
    elif test "$pac_cv_prog_fc_works" = no; then
        AC_MSG_WARN([Use --disable-fc to keep configure from searching for a Fortran 90 compiler])