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[svn-r7012] replaced NMPI_[i]Send, [i]Recv, Wait[all] and Test with MPIR__impl, or directly called MPID_ functions.  Reviewed by jayesh@

[svn-r7005] Remove support for the MPI-1.0 only datatypes MPI_2COMPLEX and MPI_2DOUBLE_COMPLEX (support and be reenable by defining MPICH_DEFINE_2COMPLEX in case we have any users that really need it)

No reviewer.

[svn-r6997] Due to changes in the autoconf macros, the PAC macro to select the compilers to use with MPI programs required multiple changes, as autoconf would prematurely run AC_PROG_CC.  These factor the MPI checks into provide AC_ARG options, select compilers, and check libraries

[svn-r6996] Due to changes in the autoconf macros, the PAC_PROG_CC version no longer does all that AC_PROG_CC does, and thus can no longer assert that it provides AC_PROG_CC

There are probably more uses out there that I am missing at this point.

No reviewer.

No reviewer.

This is necessary because there is no portable way to statically initialize
mutexes.  Windows doesn't support it, and some older POSIX impls don't either.

No reviewer.

[svn-r6974] Fix to make async.c not get added to libpmpich.a in order to avoid warnings about empty archives on mac

Originally broken by r6919.

No reviewer.

Thanks to Joe Ratterman @ IBM for the bug report.

No reviewer.

This required moving CHKMEMCPYANDSTMT above the "/* --BEGIN ERROR MACROS-- */"
line.  This lets maint/extracterrmsgs know that **memcpyalias is
actually used and avoids an "(unknown)(): Internal MPI error!" message
when memcpy arguments are aliased in MPIR_Localcopy.

Also fix a format string mismatch.

No reviewer.

[svn-r6949] Added Mac OSX Darwin to known architectures for ROMIO.  This eliminates warnings about unrecognized architecture when building ROMIO

[svn-r6940] Replaced enable_fc=default setting by enable_fc=yes and set enable_fc=no if any Fortran90 test fails.  Guarded all AC_PROG_[CC|F77|FC|CXX] so none of the *FLAGS would be set -g -O2.  Eliminated duplicated PAC_PROG_FC/PAC_PROG_FC_WORKS caused by inconsistent use of enable_fc=default.  Moved AC_PROG_[CC|F77|FC|CXX] right before the corresponding language tests to improve readability of the code.

[svn-r6939] bug fix:  the communicator wasn't passed to the err_return function, so we weren't checking whether to return errors or abort

This commit may be slightly conservative in some of the pt2pt code, but
it is not obvious that persistent requests handles don't need to be
published safely.  Until it is proven otherwise, we will take the
write memory barrier hit (on some platforms).

No reviewer.

Racy accesses don't happen any longer, although I think this code now runs
slower in some cases.  Also, unrelated to this change, this algorithm probably
scales poorly with the number of contending threads.

No reviewer.

No reviewer.

When compiled for fine-grained threading, the completion counter serves
as a form of lockfree signalling.  As such, atomic access and memory
barriers must be used to ensure correctness.

In per-object mode, this code also contains valgrind client request annotations
to inform Helgrind/DRD/TSan about the lockfree signalling pattern.

No reviewer.

No reviewer.

A small helper function to handle the common-ish case of running the
progress engine until a particular request is complete.

No reviewer.

[svn-r6903] Fixed some warnings, fixed compile failure with --enable-fast, fixed places where MPIR_Err_return_* was not being called.  No reviewer.

[svn-r6898] fix to r6897 so that top-level configure's enable-option-checking is followed in the subconfigure.

[svn-r6897] disable option checking in mpich2's configure of subpackage (no more warnings of unrecognize --enable or --with options) so it behaves the same as AC_CONFIG_SUBDIRS.