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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 
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dnl the other modules that can be used to construct MPICH, such as
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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,
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dnl for example, --with-pm=hydra or --with-device=ch3:nemesis).
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dnl For each module, source the file mpichprereq if present (in the
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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    MPID_MAX_PROCESSOR_NAME - The maximum number of character in a processor
dnl                            name.  If not set, 128 will be used.
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dnl    MPID_MAX_ERROR_STRING - The maximum number of character in an error
dnl                            string.  If not set, 1024 will be used.
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dnl    MPID_LIBTOOL_STATIC_FLAG - The static compilation flag to use
dnl                               for the example executables within
dnl                               mpich.  If not set, -static will be
dnl                               used.
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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
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dnl know that they are being invoked from within the MPICH configure,
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dnl the following environment variables are set and exported:
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dnl    FROM_MPICH
dnl    MPICH_ENABLE_F77
dnl    MPICH_ENABLE_FC
dnl    MPICH_ENABLE_CXX
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dnl
dnl Note that no executable statements are allowed (and any are silently 
dnl dropped) before AC_INIT.
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m4_include([maint/version.m4])
dnl 2nd arg is intentionally underquoted
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AC_INIT([MPICH],
        MPICH_VERSION_m4,
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        [discuss@mpich.org],
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        [mpich],
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        [http://www.mpich.org/])
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if test "x$prefix" != "xNONE" && test -d "$prefix"; then 
    if test "x`(cd \"$prefix\"; echo \"$PWD\")`" = "x`(cd \"$srcdir\"; echo \"$PWD\")`" ||\
       test "x`(cd \"$prefix\"; echo \"$PWD\")`" = "x$PWD"  ; then
        AC_MSG_ERROR([The install directory (--prefix=) cannot be the same as the build or src directory.])
    fi
fi         

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CONFIGURE_ARGS_CLEAN=`echo $* | tr '"' ' '`
AC_SUBST(CONFIGURE_ARGS_CLEAN)

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# these values come from the m4_include above
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MPICH_VERSION=MPICH_VERSION_m4
AC_SUBST([MPICH_VERSION])
MPICH_RELEASE_DATE="MPICH_RELEASE_DATE_m4"
AC_SUBST([MPICH_RELEASE_DATE])
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libmpi_so_version="libmpi_so_version_m4"
AC_SUBST([libmpi_so_version])
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if test -z "$MPICH_VERSION" ; then
    AC_MSG_ERROR([MPICH_VERSION is empty, check maint/version.m4 for errors])
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fi
# 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 $MPICH_VERSION : '\([0-9]*\)\.[0-9]*\.*[0-9]*[a-zA-Z]*[0-9]*'`
V2=`expr $MPICH_VERSION : '[0-9]*\.\([0-9]*\)\.*[0-9]*[a-zA-Z]*[0-9]*'`
V3=`expr $MPICH_VERSION : '[0-9]*\.[0-9]*\.*\([0-9]*\)[a-zA-Z]*[0-9]*'`
V4=`expr $MPICH_VERSION : '[0-9]*\.[0-9]*\.*[0-9]*\([a-zA-Z]*\)[0-9]*'`
V5=`expr $MPICH_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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MPICH_NUMVERSION=`expr $V1$V2$V3$V4$V5 + 0`
AC_SUBST(MPICH_NUMVERSION)
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# ABIVERSION is the name used by simplemake, so we reassign the
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# libmpi_so_version number to it
ABIVERSION=${libmpi_so_version}
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export ABIVERSION
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export libmpi_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 MPICH version $MPICH_VERSION with $ac_configure_args"
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else 
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    echo "Configuring MPICH version $MPICH_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 ; -*- */
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/*
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 *  (C) 2001 by Argonne National Laboratory.
 *      See COPYRIGHT in top-level directory.
 */
#ifndef MPICHCONF_H_INCLUDED
#define MPICHCONF_H_INCLUDED
])
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# We use an #include strategy here because all of the alternative strategies for
# quashing these variables have various drawbacks.  The alternatives are listed
# here to avoid rediscovery of these problems by someone else in the future:
#
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# 1) Strategy: Rewrite mpichconf.h.in with sed at autogen.sh time.
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#    Problem: Automatic remaking of config.status and friends will re-run
#             autoheader and blow away our sed changes without an opportunity to
#             patch the resulting file again.
# 2) Strategy: Add literal "#undef PACKAGE" lines to the AH_BOTTOM text.
#    Problem: These lines get rewritten by config.status to be "#define" lines,
#             so the intended quashing never actually occurs.
# 3) Strategy: Use AC_CONFIG_COMMANDS to run a sed rewrite command on
#              mpichconf.h at config.status time.
#    Problem: Causes mpichconf.h to always be rewritten, first by the normal
#             config.status commands and then by sed.  This can cause
#             unnecessary remaking of object files since nearly every C source
#             file includes this header (see the Autoconf Manual, "Automatic
#             Remaking")
#
# The only other plausible strategy would seem to be rewriting config.status
# itself via AC_CONFIG_COMMANDS_POST, but that seems error prone.  The best
# solution would be to stop all subconfigures from including config.h headers
# from other packages.  Then all of this nonsense can be eliminated.
# [goodell@ 2011-08-26]
AH_BOTTOM([
/* Include nopackage.h to undef autoconf-defined macros that cause conflicts in
 * subpackages.  This should not be necessary, but some packages are too
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 * tightly intertwined right now (such as ROMIO and the MPICH core) */
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#include "nopackage.h"

#endif /* !defined(MPICHCONF_H_INCLUDED) */
])
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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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dnl our macro dir is the same as our aux dir
AC_CONFIG_MACRO_DIR([confdb])
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# Set the FROM_MPICH variable to tell subconfigures that they are
# built from within MPICH
FROM_MPICH=yes
export FROM_MPICH
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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
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# that are added by MPICH, but should be used by applications (such
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# as include paths).
#
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# All libraries that are detected by MPICH as needed for some of its
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# functionality (such as -lpthread) should be added to EXTERNAL_LIBS
# so executables built within MPICH use them.  If inter-library
# dependencies are not supported on the platform, these libraries are
# added to the MPICH wrappers (mpicc and friends) as well.
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PAC_PREFIX_ALL_FLAGS(WRAPPER)
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WRAPPER_CFLAGS="$CFLAGS $MPICH_MPICC_FLAGS"
WRAPPER_CPPFLAGS="$CPPFLAGS $MPICH_MPICPP_FLAGS"
WRAPPER_CXXFLAGS="$CXXFLAGS $MPICH_MPICXX_FLAGS"
WRAPPER_FFLAGS="$FFLAGS $MPICH_MPIF77_FLAGS"
WRAPPER_FCFLAGS="$FCFLAGS $MPICH_MPIFC_FLAGS"
WRAPPER_LDFLAGS="$MPICH_LDFLAGS"
WRAPPER_LIBS="$MPICH_LIBS"
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EXTERNAL_LIBS=""
export EXTERNAL_LIBS
AC_SUBST(EXTERNAL_LIBS)
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# Add MPICHLIB_* to the appropriate flags
AC_ARG_VAR(MPICHLIB_CFLAGS,
	[extra CFLAGS used in building MPICH libraries])
AC_ARG_VAR(MPICHLIB_CPPFLAGS,
	[extra CPPFLAGS used in building MPICH libraries])
AC_ARG_VAR(MPICHLIB_CXXFLAGS,
	[extra CXXFLAGS used in building MPICH libraries])
AC_ARG_VAR(MPICHLIB_FFLAGS,
	[extra FFLAGS used in building MPICH libraries])
AC_ARG_VAR(MPICHLIB_FCFLAGS,
	[extra FCFLAGS used in building MPICH libraries])
AC_ARG_VAR(MPICHLIB_LDFLAGS,
	[extra LDFLAGS used in building MPICH libraries])
AC_ARG_VAR(MPICHLIB_LIBS,
	[extra LIBS used in building MPICH libraries])
CFLAGS="$CFLAGS $MPICHLIB_CFLAGS"
CPPFLAGS="$CPPFLAGS $MPICHLIB_CPPFLAGS"
CXXFLAGS="$CXXFLAGS $MPICHLIB_CXXFLAGS"
FFLAGS="$FFLAGS $MPICHLIB_FFLAGS"
FCFLAGS="$FCFLAGS $MPICHLIB_FCFLAGS"
LDFLAGS="$LDFLAGS $MPICHLIB_LDFLAGS"
LIBS="$LIBS $MPICHLIB_LIBS"
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dnl include all subsystem m4 fragments now that the core autoconf functionality
dnl has been setup.  No fragment should do anything except define
dnl PAC_SUBCFG_{PREREQ,BODY} macros which will be expanded later as
dnl appropriate
# begin subsys includes
m4_include([subsys_include.m4])
# end subsys includes
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dnl ----------------------------------------------------------------------------
dnl setup top-level argument handling
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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(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
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        all       - error checking always enabled (default)
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],,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
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                       MPICH implementation.  "option" is a list of comma
                       separated names including.  Default is "most".
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        none     - No debugging
        handle   - Trace handle operations
        handlealloc - Trace handle allocations
        dbg      - Add compiler flag, -g, to all internal
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                   compiler flags, i.e. MPICHLIB_CFLAGS, MPICHLIB_CXXFLAGS,
                   MPICHLIB_FFLAGS, and MPICHLIB_FCFLAGS.
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        debug    - Synonym for dbg
        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
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        most     - Most of the above options, excluding some with severe
                   performance impacts.  Recommended for typical development.
        yes      - synonym for "most" (*not* "all")
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        all      - All of the above choices
],,enable_g=none)

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AC_ARG_ENABLE([mpit_pvars],
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[  --enable-mpit-pvars=list - Selectively enable MPI_T performance variables in
                      modules. list is a comma-separated module names,
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                      including (Default is "none"):
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        none     - No performance info recorded
        recvq    - All message queue-related
        nem      - All nemesis-related
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        rma      - All rma-related
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        all      - All variables above
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],[],[enable_mpit_pvars=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
        O<n>     - Appends default optimization flags, -O<n>, to all internal
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                   compiler flags, i.e. MPICHLIB_CFLAGS, MPICHLIB_CXXFLAGS,
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                   MPICHLIB_FFLAGS, and MPICHLIB_FCFLAGS. (default is -O2)
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        ndebug   - Appends -DNDEBUG to MPICHLIB_CFLAGS.
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        all|yes  - "O2" and "ndebug" are enabled
        none     - None of above options, i.e. --disable-fast
],,enable_fast=O2)
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AC_ARG_ENABLE(interlib-deps,
	[AC_HELP_STRING([--interlib-deps - Enable interlibrary dependencies])],,enable_interlib_deps=yes)

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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
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                       options, xxxFLAGS, MPICH_xxxFLAGS. Default is on.]),,
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		       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(fortran,
[  --enable-fortran=option - Control the level of Fortran support in the MPICH implementation.
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	yes|all   - Enable all available Fortran implementations (F77, F90+)
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	f77       - Enable Fortran 77 support
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	fc        - Enable Fortran 90 and 2008 support
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	no|none   - No Fortran support
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],,[enable_fortran=all])
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AC_ARG_ENABLE(f77,
	AC_HELP_STRING([--enable-f77],
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		[DEPRECATED: Use --enable-fortran or --disable-fortran instead]),,[enable_f77=yes])
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AC_ARG_ENABLE(fc,
	AC_HELP_STRING([--enable-fc],
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		[DEPRECATED: Use --enable-fortran or --disable-fortran instead]),,[enable_fc=yes])
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AC_ARG_ENABLE(cxx,
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	AC_HELP_STRING([--enable-cxx], [Enable C++ bindings]),,enable_cxx=yes)
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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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## Enable creation of libtool-style versioning or no versioning
AC_ARG_ENABLE(versioning,
        [AC_HELP_STRING([--enable-versioning],[Enable library versioning])],,
        [enable_versioning=yes])

if test "$enable_versioning" = "yes" ; then
   ABIVERSIONFLAGS="-version-info \$(ABIVERSION)"
else
   ABIVERSIONFLAGS="-avoid-version"
fi
export ABIVERSIONFLAGS
AC_SUBST(ABIVERSIONFLAGS)


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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
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dnl load to access the MPICH internal data structures.
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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
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                 will be installed.  Example: "--with-pm=hydra:gforker"
                 builds the two process managers hydra, and gforker;
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                 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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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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        multiple        - Fully multi-threaded (MPI_THREAD_MULTIPLE)
        runtime         - Alias to "multiple"
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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_ARG_ENABLE(handle-allocation,
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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([two-level-namespace],
              [AS_HELP_STRING([--enable-two-level-namespace],
                              [(Darwin only) Build shared libraries and programs
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                               built with the mpicc/mpifort/etc. compiler
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                               wrappers with '-Wl,-commons,use_dylibs' and
                               without '-Wl,-flat_namespace'.  This may make the
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                               MPICH installation and MPI programs more
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                               compatible with other libraries.  Only enable
                               this option if you really know what these linker
                               options imply.])],
              [],
              [enable_two_level_namespace=no])

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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_ENABLE([wrapper-rpath],
              [AC_HELP_STRING([--enable-wrapper-rpath],
                              [Determine whether the rpath is set when programs
                               are linked by mpicc compiler wrappers.  This only
                               applies when shared libraries are built.  The
                               default is yes; use --disable-wrapper-rpath to
                               turn this feature off.  In that case, shared
                               libraries will be found according to the rules
                               for your system (e.g., in LD_LIBRARY_PATH)])],
              [],[enable_wrapper_rpath=yes])
AC_SUBST([enable_wrapper_rpath])

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AC_ARG_ENABLE([long-double],
              [AC_HELP_STRING([--disable-long-double],
                              [Pass --disable-long-double to prevent the MPI
                               library from supporting the C "long double" type,
                               even if the C compiler supports it.  "long
                               double" support is enabled by default, provided
                               the compiler supports it.])],
              [],
              [enable_long_double=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
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                 determine in a cross-compilation environment]),,
		 with_cross=$MPID_DEFAULT_CROSS_FILE)
if test -z "$with_cross" ; then with_cross=no ; fi
if test "$with_cross" != "no"; then
  AC_MSG_NOTICE([Using cross file: $with_cross])
fi
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AC_ARG_WITH(namepublisher,
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[  --with-namepublisher=name   Choose the system that will support 
                              MPI_PUBLISH_NAME and MPI_LOOKUP_NAME.  Options
                              include
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                                   pmi (default)
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			           file[:directory] (optional directory)
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                                   no (no service available)],,with_namepublisher=default)
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AC_ARG_WITH(name-publisher,
    [],
    with_namepublisher=$with_name_publisher,)
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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
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AM_PROG_CC_C_O dnl needed for automake "silent-rules"
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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])

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dnl now that autoconf and core compilers are setup, init automake and libtool
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dnl
dnl We would like to pass -Werror, but we are cheating in the "examples/"
dnl directory and overriding the user-flags like CFLAGS, which automake-1.12
dnl warns about.  Long-term we may need to use a hand-written Makefile.in or
dnl something else in this special dir.
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AM_INIT_AUTOMAKE([-Wall -Wno-portability-recursive foreign 1.12.3 silent-rules subdir-objects])
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AM_MAINTAINER_MODE([enable])
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AM_PROG_AR
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LT_INIT()
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# Non-verbose make by default
m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])

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# Disable rpath in the compiler wrappers if shared libraries are disabled, since
# rpath makes no sense in the context of static libraries.
if test "X$enable_shared" = "Xno" ; then
    enable_wrapper_rpath=no
fi

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INTERLIB_DEPS=yes
# We conservatively disable interlibrary dependencies if the libtool
# support model is anything different from "pass_all"
if test "X$enable_shared" = "Xno" -o "$deplibs_check_method" != "pass_all" -o "$enable_interlib_deps" = "no" ; then
    INTERLIB_DEPS=no
fi
export INTERLIB_DEPS
AC_SUBST(INTERLIB_DEPS)

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dnl AC_PROG_{CXX,F77,FC} must come early in configure.ac in order to avoid some
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dnl esoteric autoconf macro expansion errors
dnl
dnl Also, DO NOT attempt to place shell conditionals (either manually or via
dnl AS_IF) around these macros in an effort to save configure time.  It will
dnl lead to weird AM_CONDITIONAL errors and potentially other problems.

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# Before attempting to find valid compilers, set the corresponding precious
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# shell variable to "no" for any languages that have been disabled by the user
# with "--disable-LANG".  Libtool understands this as a request to disable
# support for this language. This should save a bit of configure time and also
# prevent user complaints like ticket #1570.
AS_IF([test "x$enable_f77" = "xno"],[F77=no])
AS_IF([test "x$enable_fc"  = "xno"],[FC=no])
AS_IF([test "x$enable_cxx" = "xno"],[CXX=no])
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# suppress default "-g -O2" from AC_PROG_CXX
: ${CXXFLAGS=""}
AC_PROG_CXX([PAC_CXX_SEARCH_LIST])

# suppress default "-g -O2" from AC_PROG_FC
: ${FCFLAGS=""}
AC_PROG_FC([PAC_FC_SEARCH_LIST])

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save_IFS="$IFS"
IFS=","
enable_f77=no
enable_fc=no
for option in $enable_fortran ; do
    case "$option" in
        yes|all)
		enable_f77=yes
		enable_fc=yes
		;;
        no|none)
		;;
        f77)
		enable_f77=yes
		;;
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        fc)
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		enable_fc=yes
		;;
        *)
		IFS="$save_IFS"
		AC_MSG_WARN([Unknown value $option for --enable-fortran])
		IFS=","
		;;
    esac
done
IFS="$save_IFS"

if test "$enable_f77" = "no" ; then
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   if test "$enable_fc" = "yes" ; then
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      AC_MSG_ERROR([Fortran 90 support requires enabling Fortran 77])
   fi
fi

if test ! -z "$FC" -a -z "$F77" ; then
   F77=$FC
   if test ! -z "$FCFLAGS" -a -z "$FFLAGS" ; then
      FFLAGS=$FCFLAGS
   fi
fi

AM_CONDITIONAL([INSTALL_MPIF77],[test "$F77" != "$FC" -a "$FFLAGS" != "$FCFLAGS"])
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# This needs to come after we've potentially set F77=$FC. Otherwise, we could
# override the user's Fortran compiler selection when only specifying FC at configure
# time, as is allowed.
# suppress default "-g -O2" from AC_PROG_F77
: ${FFLAGS=""}
AC_PROG_F77([PAC_F77_SEARCH_LIST])

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

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# -----------------------------------------------------------------------------
# First check that we have a clean build if we are doing a VPATH build
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PAC_VPATH_CHECK(src/include/mpi.h src/env/mpicc,lib)
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# ----------------------------------------------------------------------------
# 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 "$master_top_builddir" ; then
   master_top_builddir="`pwd`"
fi
AC_SUBST(master_top_builddir)
AC_SUBST(master_top_srcdir)
export master_top_builddir
export master_top_srcdir
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# ----------------------------------------------------------------------------
dnl Export important "precious" variables so that any directories configured via
dnl PAC_CONFIG_SUBDIR will agree with the top-level configure about these
dnl critical variables (esp. compiler selection).  These exports should come
dnl before any subconfigures in this script.
dnl
dnl This list is arguably incomplete, and should possibly be automatically
dnl generated from "$ac_precious_vars" using code similar to the implementation
dnl of PAC_CONFIG_SUBDIR.
dnl
dnl To be clear, without these exports any variable values determined by this
dnl configure script will not be seen by child scripts.  Instead they will dnl
dnl receive the only the original inherited environment and configure args used
dnl when this configure script was invoked.
export AR
export AR_FLAGS
export CC
export CFLAGS
export CPPFLAGS
export CXX
export CXXFLAGS
export F77
export FC
export FCFLAGS
export FFLAGS
export LDFLAGS
export LIBS
export MPILIBNAME
export PMPILIBNAME
export RANLIB
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export OPALIBNAME
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export MPLLIBNAME
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# ----------------------------------------------------------------------------
# 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

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# See if the device wants to say something about the compilers
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if test -f $devicedir/mpichprereq ; then
    . $devicedir/mpichprereq
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fi

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# expand all of the prereq macros in the correct order
m4_map([PAC_SUBCFG_DO_PREREQ], [PAC_SUBCFG_MODULE_LIST])

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# ----------------------------------------------------------------------------
# Set default library names if names haven't already been provided
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AC_ARG_VAR([MPILIBNAME],[can be used to override the name of the MPI library (default: "mpi")])
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AC_ARG_VAR([PMPILIBNAME],[can be used to override the name of the MPI profiling library (default: "p$MPILIBNAME")])
AC_ARG_VAR([MPICXXLIBNAME],[can be used to override the name of the MPI C++ library (default: "${MPILIBNAME}cxx")])
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AC_ARG_VAR([MPIFCLIBNAME],[can be used to override the name of the MPI fortran library (default: "${MPILIBNAME}fort")])
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MPILIBNAME=${MPILIBNAME:-"mpi"}
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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="${MPILIBNAME}cxx" ; fi
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if test -z "$MPIFCLIBNAME" ; then MPIFCLIBNAME="${MPILIBNAME}fort" ; fi
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export MPICXXLIBNAME
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export MPIFCLIBNAME
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AC_SUBST(MPICXXLIBNAME)
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AC_SUBST(MPIFCLIBNAME)
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# We'll set FORTRAN_BINDING to 1 if we support Fortran 
FORTRAN_BINDING=0

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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
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        O*)
        enable_fast_opts=$option
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        ;;
        ndebug)
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        enable_fast_ndebug=yes
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        ;;
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        all|yes)
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        enable_fast_ndebug=yes
        enable_fast_opts=O2
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        ;;
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        none|no)
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        enable_fast_ndebug=no
        enable_fast_opts=O0
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        ;;
        *)
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	IFS="$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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if test -n "$enable_fast_opts" ; then
   # Allows O<n> where <n> can be [0-9] or ' '.
   opt_flags=`echo $enable_fast_opts | sed -e 's%\(O[0-9] \)%\1%g'`
   if test -n "$opt_flags" ; then
      MPI_DEFAULT_COPTS="-$enable_fast_opts"
      MPI_DEFAULT_CXXOPTS="-$enable_fast_opts"
      MPI_DEFAULT_FOPTS="-$enable_fast_opts"
      MPI_DEFAULT_FCOPTS="-$enable_fast_opts"
   else
      AC_MSG_WARN([Unknown value $enable_fast_opts for --enable-fast])
   fi
fi

if test "$enable_fast_ndebug" = "yes" ; then
    CFLAGS="$CFLAGS -DNDEBUG -DNVALGRIND"
    CXXFLAGS="$CXXFLAGS -DNDEBUG -DNVALGRIND"
    # MPICH does NOT assume any preprocessing support from the Fortran compiler,
    # so no Fortran files contain any preprocessing statements.
    # Don't set FFLAGS or FCFLAGS with any -D.
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fi

# error-checking
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if test "$enable_error_checking" = "yes" ; then
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   enable_error_checking=all
fi
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# glue_romio.h needs the variable HAVE_ERROR_CHECKING to have the value 0 or 1
HAVE_ERROR_CHECKING=0
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case "$enable_error_checking" in 
    no)
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    # if error checking has been disabled, then automatically disable the error
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    # checking tests in the test suite
    ac_configure_args="${ac_configure_args} --disable-checkerrors"
    ;;
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    all|runtime)
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    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])
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    HAVE_ERROR_CHECKING=1
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    ;;
    *)
    AC_MSG_WARN([Unknown value $enable_error_checking for enable-error-checking])
    ;;
esac
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# permit @HAVE_ERROR_CHECKING@ substitution in glue_romio.h 
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# error-messages
case "$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
#
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#
# 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).
# ----------------------------------------------------------------------------
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AM_CONDITIONAL([BUILD_LOGGING_RLOG],[test "X$with_logging" = "Xrlog"])
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collect_stats=false
logging_required=false
if test "$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 $logdir && pwd`
1070
	# Switch name to "external" because that is how the MPICH
1071
1072
1073
1074
	# code will know it
	logging_name=external
	# Add the dir to the include paths
	#CPPFLAGS="$CPPFLAGS -I$logdir"
1075
	CPPFLAGS="$CPPFLAGS -I$logdir"
1076
1077
1078
1079
1080
1081
	# 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
1082
1083
        logreldir=src/util/logging/$logging_name
        logging_subsystems="$logging_subsystems $logreldir"
1084
        for dir in $logging_name ; do
1085
1086
1087
1088
1089
1090
1091
            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
1092
	        AC_MSG_ERROR([$srcdir/$dir has no configure (required).  Configure aborted])
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
	        logging_name=none
            fi
        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
	subsystems="$subsystems $logging_subsystems"
    else
	AC_MSG_WARN([Timing was disabled.  Logging has been disabled as well.])
	with_logging=no
	logging_name=none
    fi
else
    if test "$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
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
1129

1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
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

1146
# MPL
1147
1148
1149
1150
AC_ARG_VAR([MPLLIBNAME],[can be used to override the name of the MPL library (default: "mpl")])
MPLLIBNAME=${MPLLIBNAME:-"mpl"}
export MPLLIBNAME
AC_SUBST(MPLLIBNAME)
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
AC_ARG_WITH([mpl-prefix],
            [AS_HELP_STRING([[--with-mpl-prefix[=DIR]]],
                            [use the MPL library installed in DIR,
                             rather than the one included in src/mpl.  Pass
                             "embedded" to force usage of the MPL source
                             distributed with MPICH2.])],
            [],dnl action-if-given
            [with_mpl_prefix=embedded]) dnl action-if-not-given
mplsrcdir=""
AC_SUBST([mplsrcdir])
mpllibdir=""
AC_SUBST([mpllibdir])
1163
1164
mpllib=""
AC_SUBST([mpllib])
1165
1166
1167
1168
1169
1170
1171
if test "$with_mpl_prefix" = "embedded" ; then
    PAC_CONFIG_SUBDIR(src/mpl,,AC_MSG_ERROR(MPL configure failed))
    PAC_APPEND_FLAG([-I${master_top_builddir}/src/mpl/include], [CPPFLAGS])
    PAC_APPEND_FLAG([-I${use_top_srcdir}/src/mpl/include], [CPPFLAGS])

    mpllibdir="${master_top_builddir}/src/mpl"
    mplsrcdir="${master_top_builddir}/src/mpl"
1172
    mpllib="src/mpl/lib${MPLLIBNAME}.la"
1173
1174
1175
1176
1177
1178
else
    # The user specified an already-installed MPL; just sanity check, don't
    # subconfigure it
    AS_IF([test -s "${with_mpl_prefix}/include/mplconfig.h"],
          [:],[AC_MSG_ERROR([the MPL installation in "${with_mpl_prefix}" appears broken])])
    PAC_APPEND_FLAG([-I${with_mpl_prefix}/include],[CPPFLAGS])
1179
    PAC_PREPEND_FLAG([-l${MPLLIBNAME}],[EXTERNAL_LIBS])
1180
1181
1182
    PAC_APPEND_FLAG([-L${with_mpl_prefix}/lib],[WRAPPER_LDFLAGS])
    mpllibdir="${with_mpl_prefix}/lib"
fi
1183

1184
# OpenPA
1185
1186
1187
1188
AC_ARG_VAR([OPALIBNAME],[can be used to override the name of the OpenPA library (default: "opa")])
OPALIBNAME=${OPALIBNAME:-"opa"}
export OPALIBNAME
AC_SUBST(OPALIBNAME)
1189
1190
1191
1192
1193
AC_ARG_WITH([openpa-prefix],
            [AS_HELP_STRING([[--with-openpa-prefix[=DIR]]],
                            [use the OpenPA atomics library installed in DIR,
                             rather than the one included in src/openpa.  Pass
                             "embedded" to force usage of the OpenPA source
1194
                             distributed with MPICH.])],
1195
1196
1197
            [],
            [# see if OPA is already installed on the system
             PAC_PUSH_FLAG([LIBS])
1198
             PAC_PREPEND_FLAG([-l${OPALIBNAME}],[LIBS])
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
             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])
             ])

1211
1212
1213
1214
opasrcdir=""
AC_SUBST([opasrcdir])
opalibdir=""
AC_SUBST([opalibdir])
1215
1216
opalib=""
AC_SUBST([opalib])
1217

1218
1219
if test "$with_openpa_prefix" = "embedded" ; then
    if test -e "${use_top_srcdir}/src/openpa" ; then
1220
1221
        opasrcdir="${master_top_builddir}/src/openpa"
        opalibdir="${master_top_builddir}/src/openpa/src"
1222
        opalib="${master_top_builddir}/src/openpa/src/lib${OPALIBNAME}.la"
1223
1224
1225
        PAC_APPEND_FLAG([-I${use_top_srcdir}/src/openpa/src],[CPPFLAGS])
        PAC_APPEND_FLAG([-I${master_top_builddir}/src/openpa/src],[CPPFLAGS])

1226
        # OPA defaults to "auto", but in MPICH we want "auto_allow_emulation" to
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
        # 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 "$with_atomic_primitives" = "not_specified" ; then
            opa_subdir_args="--with-atomic-primitives=auto_allow_emulation"
        fi
1238
        PAC_CONFIG_SUBDIR_ARGS([src/openpa],[$opa_subdir_args],[],[AC_MSG_ERROR([OpenPA configure failed])])
1239
1240
    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.])
1241
    fi
1242
elif test "$with_openpa_prefix" = "system" ; then
1243
    PAC_PREPEND_FLAG([-l${OPALIBNAME}],[EXTERNAL_LIBS])
1244
elif test "$with_openpa_prefix" = "no" ; then
1245
    # The user doesn't want to use OPA.  This may or may not cause MPICH to
1246
1247
1248
1249
1250
1251
1252
1253
    # fail to configure/build, depending on many other factors.
    :
else
    # The user specified an already-installed OPA; just sanity check, don't
    # subconfigure it
    AS_IF([test -s "${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${with_openpa_prefix}/include],[CPPFLAGS])
1254
    PAC_PREPEND_FLAG([-l${OPALIBNAME}],[EXTERNAL_LIBS])
1255
1256
    if test -d ${with_openpa_prefix}/lib64 ; then
        PAC_APPEND_FLAG([-L${with_openpa_prefix}/lib64],[WRAPPER_LDFLAGS])
1257
1258
1259
        opalibdir="${with_openpa_prefix}/lib64"
    else
        opalibdir="${with_openpa_prefix}/lib"
1260
1261
    fi
    PAC_APPEND_FLAG([-L${with_openpa_prefix}/lib],[WRAPPER_LDFLAGS])
1262
1263
fi

1264
1265
1266
1267
1268
1269
# ----------------------------------------------------------------------------
# Threads
# ----------------------------------------------------------------------------
#
# Threads must be supported by the device.  First, set the default to
# be the highest supported by the device
1270
1271
# "runtime" was an old (now deprecated) option; just map it to multiple
if test "$enable_threads" = "runtime" ; then enable_threads=multiple ; fi
1272
if test "$enable_threads" = "yes" ; then enable_threads=default ; fi
1273
if test "$enable_threads" = "no" ; then enable_threads=single ; fi
1274
if test "$enable_threads" = default ; then
1275
    # XXX DJG bug is here, PREREQ is not being used right now
1276
1277
1278
1279
1280
    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 ;;
1281
            MPI_THREAD_MULTIPLE)   enable_threads=multiple ;;
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
            *) AC_MSG_ERROR([Unrecognized thread level from device $MPID_MAX_THREAD_LEVEL])
    	    ;;
        esac
    else
        enable_threads=single
    fi
fi

MPICH_THREAD_LEVEL=MPI_THREAD_FUNNELED
case "$enable_threads" in 
    single)
    thread_pkg_required=no
    MPICH_THREAD_LEVEL=MPI_THREAD_SINGLE
    ;;
    funneled)
    thread_pkg_required=no
    MPICH_THREAD_LEVEL=MPI_THREAD_FUNNELED
    ;;
    serialized)
1301
    thread_pkg_required=no
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
    MPICH_THREAD_LEVEL=MPI_THREAD_SERIALIZED
    ;;
    multiple)
    thread_pkg_required=yes
    MPICH_THREAD_LEVEL=MPI_THREAD_MULTIPLE
    ;;
    *)
    AC_MSG_ERROR(["$enable_threads" is not a valid value for --enable-threads])     
    ;;
esac
# Check that the requested thread level is available.
threadLevelOK=yes
1314
if test ! -z "$MPID_MAX_THREAD_LEVEL" ; then
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
    # 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])

1345
1346
1347
1348
# If not in MPI_THREAD_SINGLE, we need -D_REENTRANT to get thread-safe "errno".
# Most POSIX systems provide this by default when using -lpthread, but we only use it in MPI_THREAD_MULTIPLE.
# Some systems (Solaris) still require an explicit define in any case.
if test "$MPICH_THREAD_LEVEL" != "MPI_THREAD_SINGLE"; then
1349
    PAC_APPEND_FLAG([-D_REENTRANT], [CPPFLAGS])
1350
1351
fi

1352
# Check for value thread_cs choice; set the refcount default if necessary
1353
1354
thread_granularity=MPIU_THREAD_GRANULARITY_SINGLE
thread_refcount=MPIU_REFCOUNT_NONE
1355
1356
1357
1358
1359
1360
1361
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)
1362
    AC_MSG_ERROR([--enable-thread-cs=brief-global is no longer supported, please select a different granularity])
1363
1364
1365
1366
1367
1368
1369
1370
    ;;
    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
1371
    if test "$enable_predefined_refcount" = "default" ; then enable_predefined_refcount=no ; fi
1372
    AC_MSG_ERROR([--enable-thread-cs=lock-free is not supported yet, please select a different granularity])
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
    ;;
    *)
    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])

1396
1397
1398
1399
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

1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
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])

1416
1417
1418
1419
1420
1421
1422
# enable-g
# strip off multiple options, separated by commas
save_IFS="$IFS"
IFS=","
for option in $enable_g ; do
    case "$option" in 
        debug|dbg)
1423
        enable_append_g=yes
1424
1425
1426
	;;
        no|none)
	;;
1427
1428
1429
	handlealloc)
	perform_handlealloc=yes
	;;
1430
	handle)
1431
        perform_handle=yes
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
	;;
	meminit)
	perform_meminit=yes
	;;
	memarena)
	perform_memarena=yes
	perform_memtracing=yes
	;;
	mem)
	perform_memtracing=yes
	;;
	log)
	perform_dbglog=yes
	;;
	mutex)
	perform_dbgmutex=yes
	;;
1449
1450
1451
	mutexnesting)
	perform_mutexnesting=yes
	;;
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
        most|yes)
        perform_memtracing=yes
        perform_dbglog=yes
        enable_append_g=yes
        perform_meminit=yes
        perform_dbgmutex=yes
        perform_mutexnesting=yes
        perform_handlealloc=yes
        perform_handle=yes
        ;;
	all)
        perform_memarena=yes
1464
1465
	perform_memtracing=yes
	perform_dbglog=yes
1466
	enable_append_g=yes
1467
1468
	perform_meminit=yes
	perform_dbgmutex=yes
1469
	perform_mutexnesting=yes
1470
	perform_handlealloc=yes
1471
        perform_handle=yes
1472
1473
	;;
	*)
1474
1475
1476
	IFS=$save_IFS
	AC_MSG_WARN([Unknown value $option for enable-g])
	IFS=","
1477
1478
1479
1480
	;;
    esac
done
IFS="$save_IFS"
1481
1482
1483
1484
1485

if test "$enable_append_g" = "yes" ; then
    CFLAGS="$CFLAGS -g"
    CXXFLAGS="$CXXFLAGS -g"
    FFLAGS="$FFLAGS -g"
1486
    FCFLAGS="$FCFLAGS -g"
1487
fi
1488
1489
1490
if test -n "$perform_meminit" ; then
    AC_DEFINE(MPICH_DEBUG_MEMINIT,1,[Define to enable preinitialization of memory used by structures and unions])
fi
1491
if test "$perform_handlealloc" = yes ; then
1492
1493
    AC_DEFINE(MPICH_DEBUG_HANDLEALLOC,1,[Define to enable checking of handles still allocated at MPI_Finalize])
fi
1494
1495
AS_IF([test "X$perform_handle" = "Xyes"],
      [AC_DEFINE(MPICH_DEBUG_HANDLES,1,[Define to enable handle checking])])
1496

1497
1498
1499
1500
1501
1502
1503
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
1504
1505
1506
if test -n "$perform_mutexnesting" ; then 
    AC_DEFINE(MPICH_DEBUG_MUTEXNESTING,1,[Define to check nesting in mutexes])
fi
1507
USE_DBG_LOGGING=0
1508
1509
1510
1511
1512
if test -n "$perform_dbglog" ; then
   if test "$with_logging" != "none" ; then
       AC_MSG_WARN([--with-logging overrides --enable-g=log])
   else
       AC_DEFINE(USE_DBG_LOGGING,1,[Define to enable logging macros])
1513
       USE_DBG_LOGGING=1
1514
1515
   fi
fi
1516
1517
# allow @USE_DBG_LOGGING@ substitution in glue_romio.h
AC_SUBST([USE_DBG_LOGGING])
1518
1519
1520
1521
1522
1523
1524
1525
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if test -n "$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
1534
 	ac_cv_prog_fc_cross=yes
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        ac_cv_prog_cxx_cross=yes
        export cross_compiling
1537
	# Export all cross variables.  Any subsidiary configure should also
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        # 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

# 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])