_Static_assert comes from C11. src/include/mpir_assert.h does a direct test for C11 support based upon the GCC version, which is unsafe since ICC (and other non-GCC compilers) define these macros. /* GCC 4.6 added support for _Static_assert: * http://gcc.gnu.org/gcc-4.6/changes.html */ #if (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)) && !defined __cplusplus #define HAVE_C11__STATIC_ASSERT 1 #endif MPICH needs to test for _Static_assert properly using configure. You should file a GitHub issue to track this. Jeff On Wed, Jun 13, 2018 at 2:33 PM, Gus Correa <[email protected]> wrote:

Hi MPICH experts

I am trying to build MPICH 3.2.1 with Intel compilers (icc, ifort). C++ is disabled.

The configuration step goes well, but make fails, after a lot of stuff is compiled, with the error below (undefined reference to `_Static_assert').

FYI, the OS is Linux Fedora Core 26:

Linux 4.15.17-200.fc26.x86_64 #1 SMP Thu Apr 12 18:28:26 UTC 2018 x86_64 x86_64 GNU/Linux

The Intel compiler version is 12.1.6: ifort (IFORT) 12.1.6 20120928 icc (ICC) 12.1.6 20120928

The Intel compiler environment is set the standard way recommended by Intel:

source /path/to/intel/bin/compilervars.sh intel64

Any help is appreciated. Gus Correa

****** make errror message ************************************* make[2]: Entering directory '/home/sw/mpich/inst/3.2.1/mpi ch-3.2.1/build_intel-2011.13.367' CCLD src/env/mpivars lib/.libs/libmpi.a(lib_libmpi_la-ch3_progress.o): In function `MPIDI_CH3I_Shm_send_progress': ../src/mpid/ch3/channels/nemesis/src/ch3_progress.c:(.text+0x1ea2): undefined reference to `_Static_assert' lib/.libs/libmpi.a(lib_libmpi_la-ch3i_eagernoncontig.o): In function `MPIDI_CH3I_SendNoncontig': ../src/mpid/ch3/channels/nemesis/src/ch3i_eagernoncontig.c:(.text+0x1d3): undefined reference to `_Static_assert' make[2]: *** [Makefile:19701: src/env/mpivars] Error 1 make[2]: Leaving directory '/home/sw/mpich/inst/3.2.1/mpi ch-3.2.1/build_intel-2011.13.367' make[1]: *** [Makefile:38608: all-recursive] Error 1 make[1]: Leaving directory '/home/sw/mpich/inst/3.2.1/mpi ch-3.2.1/build_intel-2011.13.367' make: *** [Makefile:10337: all] Error 2 *******************************************************************

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