configure: check for C11 and atomic types
This commit updates the configure code for Open MPI to check for C11 support. The features requested are: atomics and thread local storage. References #3879 Signed-off-by: Nathan Hjelm <hjelmn@lanl.gov>
Этот коммит содержится в:
Nathan Hjelm
Nathan Hjelm
родитель
a82f761a4a
Коммит
1e630f4a46
@ -12,7 +12,7 @@ dnl Copyright (c) 2004-2006 The Regents of the University of California.
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dnl All rights reserved.
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dnl Copyright (c) 2007-2009 Sun Microsystems, Inc. All rights reserved.
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dnl Copyright (c) 2008-2015 Cisco Systems, Inc. All rights reserved.
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dnl Copyright (c) 2012 Los Alamos National Security, LLC. All rights
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dnl Copyright (c) 2012-2017 Los Alamos National Security, LLC. All rights
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dnl reserved.
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dnl Copyright (c) 2015 Research Organization for Information Science
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dnl and Technology (RIST). All rights reserved.
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@ -23,6 +23,105 @@ dnl
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dnl $HEADER$
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dnl
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AC_DEFUN([OPAL_CC_HELPER],[
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OPAL_VAR_SCOPE_PUSH([opal_prog_cc_c11_helper_tmp])
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AC_MSG_CHECKING([$1])
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opal_prog_cc_c11_helper_tmp=0
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM([$3],[$4])],[
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$2=yes
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opal_prog_cc_c11_helper_tmp=1], [$2=no])
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AC_DEFINE_UNQUOTED([$5], [$opal_prog_cc_c11_helper_tmp], [$6])
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AC_MSG_RESULT([$$2])
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OPAL_VAR_SCOPE_POP
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])
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AC_DEFUN([OPAL_PROG_CC_C11_HELPER],[
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OPAL_VAR_SCOPE_PUSH([opal_prog_cc_c11_helper_CFLAGS_save opal_prog_cc_c11_helper__Thread_local_available opal_prog_cc_c11_helper_atomic_var_available opal_prog_cc_c11_helper__Atomic_available opal_prog_cc_c11_helper__static_assert_available opal_prog_cc_c11_helper__Generic_available])
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opal_prog_cc_c11_helper_CFLAGS_save=$CFLAGS
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CFLAGS="$CFLAGS $1"
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OPAL_CC_HELPER([if $CC $1 supports C11 thread local storage], [opal_prog_cc_c11_helper__Thread_local_available],
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[],[[static _Thread_local int foo = 1;++foo;]], [OPAL_C_HAVE__THREAD_LOCAL],
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[Whether C compiler supports __Thread_local])
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OPAL_CC_HELPER([if $CC $1 supports C11 atomic variables], [opal_prog_cc_c11_helper_atomic_var_available],
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[[#include <stdatomic.h>]], [[static atomic_long foo = 1;++foo;]], [OPAL_C_HAVE_ATOMIC_CONV_VAR],
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[Whether C compiler support atomic convenience variables in stdatomic.h])
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OPAL_CC_HELPER([if $CC $1 supports C11 _Atomic keyword], [opal_prog_cc_c11_helper__Atomic_available],
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[[#include <stdatomic.h>]],[[static _Atomic long foo = 1;++foo;]], [OPAL_C_HAVE__ATOMIC],
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[Whether C compiler supports __Atomic keyword])
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OPAL_CC_HELPER([if $CC $1 supports C11 _Generic keyword], [opal_prog_cc_c11_helper__Generic_available],
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[[#define FOO(x) (_Generic (x, int: 1))]], [[static int x, y; y = FOO(x);]], [OPAL_C_HAVE__GENERIC],
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[Whether C compiler supports __Generic keyword])
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OPAL_CC_HELPER([if $CC $1 supports C11 _Static_assert], [opal_prog_cc_c11_helper__static_assert_available],
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[[#include <stdint.h>]],[[_Static_assert(sizeof(int64_t) == 8, "WTH");]], [OPAL_C_HAVE__STATIC_ASSERT],
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[Whether C compiler support _Static_assert keyword])
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dnl At this time Open MPI only needs thread local and the atomic convenience types for C11 support. These
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dnl will likely be required in the future.
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AS_IF([test "x$opal_prog_cc_c11_helper__Thread_local_available" = "xyes" && test "x$opal_prog_cc_c11_helper_atomic_var_available" = "xyes"],
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[$2], [$3])
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CFLAGS=$opal_prog_cc_c11_helper_CFLAGS_save
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OPAL_VAR_SCOPE_POP
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])
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AC_DEFUN([OPAL_PROG_CC_C11],[
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OPAL_VAR_SCOPE_PUSH([opal_prog_cc_c11_flags])
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if test -z "$opal_cv_c11_supported" ; then
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opal_cv_c11_supported=no
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opal_cv_c11_flag_required=yes
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AC_MSG_CHECKING([if $CC requires a flag for C11])
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
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#if __STDC_VERSION__ < 201112L
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#error "Without any CLI flags, this compiler does not support C11"
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#endif
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]],[])],
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[opal_cv_c11_flag_required=no])
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AC_MSG_RESULT([$opal_cv_c11_flag_required])
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if test "x$opal_cv_c11_flag_required" = "xno" ; then
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AC_MSG_NOTICE([verifying $CC supports C11 without a flag])
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OPAL_PROG_CC_C11_HELPER([], [], [opal_cv_c11_flag_required=yes])
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fi
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if test "x$opal_cv_c11_flag_required" = "xyes" ; then
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opal_prog_cc_c11_flags="-std=gnu11 -std=c11 -c11"
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AC_MSG_NOTICE([checking if $CC supports C11 with a flag])
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opal_cv_c11_flag=
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for flag in $(echo $opal_prog_cc_c11_flags | tr ' ' '\n') ; do
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OPAL_PROG_CC_C11_HELPER([$flag],[opal_cv_c11_flag=$flag],[])
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if test "x$opal_cv_c11_flag" != "x" ; then
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CFLAGS="$CFLAGS $opal_cv_c11_flag"
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AC_MSG_NOTICE([using $flag to enable C11 support])
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opal_cv_c11_supported=yes
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break
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fi
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done
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else
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AC_MSG_NOTICE([no flag required for C11 support])
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opal_cv_c11_supported=yes
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fi
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fi
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OPAL_VAR_SCOPE_POP
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])
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# OPAL_SETUP_CC()
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# ---------------
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# Do everything required to setup the C compiler. Safe to AC_REQUIRE
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@ -41,14 +140,25 @@ AC_DEFUN([OPAL_SETUP_CC],[
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WRAPPER_CC="$CC"
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AC_SUBST([WRAPPER_CC])
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# From Open MPI 1.7 on we require a C99 compiant compiler
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AC_PROG_CC_C99
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# The result of AC_PROG_CC_C99 is stored in ac_cv_prog_cc_c99
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if test "x$ac_cv_prog_cc_c99" = xno ; then
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AC_MSG_WARN([Open MPI requires a C99 compiler])
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AC_MSG_ERROR([Aborting.])
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fi
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OPAL_PROG_CC_C11
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if test $opal_cv_c11_supported = no ; then
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# It is not currently an error if C11 support is not available. Uncomment the
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# following lines and update the warning when we require a C11 compiler.
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# AC_MSG_WARNING([Open MPI requires a C11 (or newer) compiler])
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# AC_MSG_ERROR([Aborting.])
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# From Open MPI 1.7 on we require a C99 compiant compiler
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AC_PROG_CC_C99
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# The result of AC_PROG_CC_C99 is stored in ac_cv_prog_cc_c99
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if test "x$ac_cv_prog_cc_c99" = xno ; then
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AC_MSG_WARN([Open MPI requires a C99 (or newer) compiler. C11 is recommended.])
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AC_MSG_ERROR([Aborting.])
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fi
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# Get the correct result for C11 support flags now that the compiler flags have
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# changed
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OPAL_PROG_CC_C11_HELPER([],[],[])
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fi
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OPAL_C_COMPILER_VENDOR([opal_c_vendor])
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@ -439,6 +439,11 @@ AC_CHECK_SIZEOF(wchar_t)
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AC_CHECK_SIZEOF(pid_t)
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# Check sizes of atomic types so we can define fixed-width types in OPAL
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AC_CHECK_SIZEOF(atomic_short, [],[[#include <stdatomic.h>]])
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AC_CHECK_SIZEOF(atomic_int,[],[[#include <stdatomic.h>]])
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AC_CHECK_SIZEOF(atomic_long,[],[[#include <stdatomic.h>]])
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AC_CHECK_SIZEOF(atomic_llong,[],[[#include <stdatomic.h>]])
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#
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# Check for type alignments
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