dnl -*- shell-script -*- dnl dnl Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana dnl University Research and Technology dnl Corporation. All rights reserved. dnl Copyright (c) 2004-2006 The University of Tennessee and The University dnl of Tennessee Research Foundation. All rights dnl reserved. dnl Copyright (c) 2004-2008 High Performance Computing Center Stuttgart, dnl University of Stuttgart. All rights reserved. dnl Copyright (c) 2004-2006 The Regents of the University of California. dnl All rights reserved. dnl Copyright (c) 2007-2009 Sun Microsystems, Inc. All rights reserved. dnl Copyright (c) 2008-2015 Cisco Systems, Inc. All rights reserved. dnl Copyright (c) 2012-2017 Los Alamos National Security, LLC. All rights dnl reserved. dnl Copyright (c) 2015-2019 Research Organization for Information Science dnl and Technology (RIST). All rights reserved. dnl Copyright (c) 2020 Triad National Security, LLC. All rights dnl reserved. dnl dnl $COPYRIGHT$ dnl dnl Additional copyrights may follow dnl dnl $HEADER$ dnl AC_DEFUN([OPAL_CC_HELPER],[ OPAL_VAR_SCOPE_PUSH([opal_cc_helper_result]) AC_MSG_CHECKING([$1]) AC_LINK_IFELSE([AC_LANG_PROGRAM([$3],[$4])], [$2=1 opal_cc_helper_result=yes], [$2=0 opal_cc_helper_result=no]) AC_MSG_RESULT([$opal_cc_helper_result]) OPAL_VAR_SCOPE_POP ]) AC_DEFUN([OPAL_PROG_CC_C11_HELPER],[ OPAL_VAR_SCOPE_PUSH([opal_prog_cc_c11_helper_CFLAGS_save]) opal_prog_cc_c11_helper_CFLAGS_save=$CFLAGS CFLAGS="$CFLAGS $1" OPAL_CC_HELPER([if $CC $1 supports C11 _Thread_local], [opal_prog_cc_c11_helper__Thread_local_available], [],[[static _Thread_local int foo = 1;++foo;]]) OPAL_CC_HELPER([if $CC $1 supports C11 atomic variables], [opal_prog_cc_c11_helper_atomic_var_available], [[#include ]], [[static atomic_long foo = 1;++foo;]]) OPAL_CC_HELPER([if $CC $1 supports C11 _Atomic keyword], [opal_prog_cc_c11_helper__Atomic_available], [[#include ]],[[static _Atomic long foo = 1;++foo;]]) OPAL_CC_HELPER([if $CC $1 supports C11 _Generic keyword], [opal_prog_cc_c11_helper__Generic_available], [[#define FOO(x) (_Generic (x, int: 1))]], [[static int x, y; y = FOO(x);]]) OPAL_CC_HELPER([if $CC $1 supports C11 _Static_assert], [opal_prog_cc_c11_helper__static_assert_available], [[#include ]],[[_Static_assert(sizeof(int64_t) == 8, "WTH");]]) OPAL_CC_HELPER([if $CC $1 supports C11 atomic_fetch_xor_explicit], [opal_prog_cc_c11_helper_atomic_fetch_xor_explicit_available], [[#include #include ]],[[_Atomic uint32_t a; uint32_t b; atomic_fetch_xor_explicit(&a, b, memory_order_relaxed);]]) AS_IF([test $opal_prog_cc_c11_helper__Thread_local_available -eq 1 && test $opal_prog_cc_c11_helper_atomic_var_available -eq 1 && test $opal_prog_cc_c11_helper_atomic_fetch_xor_explicit_available -eq 1], [$2], [$3]) CFLAGS=$opal_prog_cc_c11_helper_CFLAGS_save OPAL_VAR_SCOPE_POP ]) AC_DEFUN([OPAL_PROG_CC_C11],[ OPAL_VAR_SCOPE_PUSH([opal_prog_cc_c11_flags]) if test -z "$opal_cv_c11_supported" ; then opal_cv_c11_supported=no opal_cv_c11_flag_required=yes AC_MSG_CHECKING([if $CC requires a flag for C11]) AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #if __STDC_VERSION__ < 201112L #error "Without any CLI flags, this compiler does not support C11" #endif ]],[])], [opal_cv_c11_flag_required=no]) AC_MSG_RESULT([$opal_cv_c11_flag_required]) if test "x$opal_cv_c11_flag_required" = "xno" ; then AC_MSG_NOTICE([verifying $CC supports C11 without a flag]) OPAL_PROG_CC_C11_HELPER([], [], [opal_cv_c11_flag_required=yes]) fi if test "x$opal_cv_c11_flag_required" = "xyes" ; then opal_prog_cc_c11_flags="-std=gnu11 -std=c11 -c11" AC_MSG_NOTICE([checking if $CC supports C11 with a flag]) opal_cv_c11_flag= for flag in $(echo $opal_prog_cc_c11_flags | tr ' ' '\n') ; do OPAL_PROG_CC_C11_HELPER([$flag],[opal_cv_c11_flag=$flag],[]) if test "x$opal_cv_c11_flag" != "x" ; then CFLAGS="$CFLAGS $opal_cv_c11_flag" AC_MSG_NOTICE([using $flag to enable C11 support]) opal_cv_c11_supported=yes break fi done else AC_MSG_NOTICE([no flag required for C11 support]) opal_cv_c11_supported=yes fi fi OPAL_VAR_SCOPE_POP ]) # OPAL_SETUP_CC() # --------------- # Do everything required to setup the C compiler. Safe to AC_REQUIRE # this macro. AC_DEFUN([OPAL_SETUP_CC],[ # AM_PROG_CC_C_O AC_REQUIREs AC_PROG_CC, so we have to be a little # careful about ordering here, and AC_REQUIRE these things so that # they get stamped out in the right order. AC_REQUIRE([_OPAL_START_SETUP_CC]) AC_REQUIRE([_OPAL_PROG_CC]) AC_REQUIRE([AM_PROG_CC_C_O]) OPAL_VAR_SCOPE_PUSH([opal_prog_cc_c11_helper__Thread_local_available opal_prog_cc_c11_helper_atomic_var_available opal_prog_cc_c11_helper__Atomic_available opal_prog_cc_c11_helper__static_assert_available opal_prog_cc_c11_helper__Generic_available opal_prog_cc__thread_available opal_prog_cc_c11_helper_atomic_fetch_xor_explicit_available]) # AC_PROG_CC_C99 changes CC (instead of CFLAGS) so save CC (without c99 # flags) for use in our wrappers. WRAPPER_CC="$CC" AC_SUBST([WRAPPER_CC]) OPAL_PROG_CC_C11 if test $opal_cv_c11_supported = no ; then # It is not currently an error if C11 support is not available. Uncomment the # following lines and update the warning when we require a C11 compiler. # AC_MSG_WARNING([Open MPI requires a C11 (or newer) compiler]) # AC_MSG_ERROR([Aborting.]) # From Open MPI 1.7 on we require a C99 compiant compiler AC_PROG_CC_C99 # The result of AC_PROG_CC_C99 is stored in ac_cv_prog_cc_c99 if test "x$ac_cv_prog_cc_c99" = xno ; then AC_MSG_WARN([Open MPI requires a C99 (or newer) compiler. C11 is recommended.]) AC_MSG_ERROR([Aborting.]) fi # Get the correct result for C11 support flags now that the compiler flags have # changed OPAL_PROG_CC_C11_HELPER([], [], []) fi # Check if compiler support __thread OPAL_CC_HELPER([if $CC $1 supports __thread], [opal_prog_cc__thread_available], [],[[static __thread int foo = 1;++foo;]]) OPAL_CC_HELPER([if $CC $1 supports C11 _Thread_local], [opal_prog_cc_c11_helper__Thread_local_available], [],[[static _Thread_local int foo = 1;++foo;]]) dnl At this time Open MPI only needs thread local and the atomic convenience types for C11 support. These dnl will likely be required in the future. AC_DEFINE_UNQUOTED([OPAL_C_HAVE__THREAD_LOCAL], [$opal_prog_cc_c11_helper__Thread_local_available], [Whether C compiler supports __Thread_local]) AC_DEFINE_UNQUOTED([OPAL_C_HAVE_ATOMIC_CONV_VAR], [$opal_prog_cc_c11_helper_atomic_var_available], [Whether C compiler support atomic convenience variables in stdatomic.h]) AC_DEFINE_UNQUOTED([OPAL_C_HAVE__ATOMIC], [$opal_prog_cc_c11_helper__Atomic_available], [Whether C compiler supports __Atomic keyword]) AC_DEFINE_UNQUOTED([OPAL_C_HAVE__GENERIC], [$opal_prog_cc_c11_helper__Generic_available], [Whether C compiler supports __Generic keyword]) AC_DEFINE_UNQUOTED([OPAL_C_HAVE__STATIC_ASSERT], [$opal_prog_cc_c11_helper__static_assert_available], [Whether C compiler support _Static_assert keyword]) AC_DEFINE_UNQUOTED([OPAL_C_HAVE___THREAD], [$opal_prog_cc__thread_available], [Whether C compiler supports __thread]) OPAL_C_COMPILER_VENDOR([opal_c_vendor]) # Check for standard headers, needed here because needed before # the types checks. AC_HEADER_STDC # GNU C and autotools are inconsistent about whether this is # defined so let's make it true everywhere for now... However, IBM # XL compilers on PPC Linux behave really badly when compiled with # _GNU_SOURCE defined, so don't define it in that situation. # # Don't use AC_GNU_SOURCE because it requires that no compiler # tests are done before setting it, and we need to at least do # enough tests to figure out if we're using XL or not. AS_IF([test "$opal_cv_c_compiler_vendor" != "ibm"], [AH_VERBATIM([_GNU_SOURCE], [/* Enable GNU extensions on systems that have them. */ #ifndef _GNU_SOURCE # undef _GNU_SOURCE #endif]) AC_DEFINE([_GNU_SOURCE])]) # Do we want code coverage if test "$WANT_COVERAGE" = "1"; then if test "$opal_c_vendor" = "gnu" ; then # For compilers > gcc-4.x, use --coverage for # compiling and linking to circumvent trouble with # libgcov. CFLAGS_orig="$CFLAGS" LDFLAGS_orig="$LDFLAGS" CFLAGS="$CFLAGS_orig --coverage" LDFLAGS="$LDFLAGS_orig --coverage" OPAL_COVERAGE_FLAGS= AC_CACHE_CHECK([if $CC supports --coverage], [opal_cv_cc_coverage], [AC_TRY_COMPILE([], [], [opal_cv_cc_coverage="yes"], [opal_cv_cc_coverage="no"])]) if test "$opal_cv_cc_coverage" = "yes" ; then OPAL_COVERAGE_FLAGS="--coverage" CLEANFILES="*.gcno ${CLEANFILES}" CONFIG_CLEAN_FILES="*.gcda *.gcov ${CONFIG_CLEAN_FILES}" else OPAL_COVERAGE_FLAGS="-ftest-coverage -fprofile-arcs" CLEANFILES="*.bb *.bbg ${CLEANFILES}" CONFIG_CLEAN_FILES="*.da *.*.gcov ${CONFIG_CLEAN_FILES}" fi CFLAGS="$CFLAGS_orig $OPAL_COVERAGE_FLAGS" LDFLAGS="$LDFLAGS_orig $OPAL_COVERAGE_FLAGS" OPAL_WRAPPER_FLAGS_ADD([CFLAGS], [$OPAL_COVERAGE_FLAGS]) OPAL_WRAPPER_FLAGS_ADD([LDFLAGS], [$OPAL_COVERAGE_FLAGS]) OPAL_FLAGS_UNIQ(CFLAGS) OPAL_FLAGS_UNIQ(LDFLAGS) AC_MSG_WARN([$OPAL_COVERAGE_FLAGS has been added to CFLAGS (--enable-coverage)]) WANT_DEBUG=1 else AC_MSG_WARN([Code coverage functionality is currently available only with GCC]) AC_MSG_ERROR([Configure: Cannot continue]) fi fi # Do we want debugging? if test "$WANT_DEBUG" = "1" && test "$enable_debug_symbols" != "no" ; then CFLAGS="$CFLAGS -g" OPAL_FLAGS_UNIQ(CFLAGS) AC_MSG_WARN([-g has been added to CFLAGS (--enable-debug)]) fi # These flags are generally gcc-specific; even the # gcc-impersonating compilers won't accept them. OPAL_CFLAGS_BEFORE_PICKY="$CFLAGS" if test $WANT_PICKY_COMPILER -eq 1; then CFLAGS_orig=$CFLAGS add= # These flags are likely GCC-specific (or, more specifically, # we don't have general tests for each one, and we know they # work with all versions of GCC that we have used throughout # the years, so we'll keep them limited just to GCC). if test "$opal_c_vendor" = "gnu" ; then add="$add -Wall -Wundef -Wno-long-long -Wsign-compare" add="$add -Wmissing-prototypes -Wstrict-prototypes" add="$add -Wcomment -pedantic" fi # see if -Wno-long-double works... # Starting with GCC-4.4, the compiler complains about not # knowing -Wno-long-double, only if -Wstrict-prototypes is set, too. # # Actually, this is not real fix, as GCC will pass on any -Wno- flag, # have fun with the warning: -Wno-britney CFLAGS="$CFLAGS_orig $add -Wno-long-double -Wstrict-prototypes" AC_CACHE_CHECK([if $CC supports -Wno-long-double], [opal_cv_cc_wno_long_double], [AC_TRY_COMPILE([], [], [ dnl So -Wno-long-double did not produce any errors... dnl We will try to extract a warning regarding dnl unrecognized or ignored options AC_TRY_COMPILE([], [long double test;], [ opal_cv_cc_wno_long_double="yes" if test -s conftest.err ; then dnl Yes, it should be "ignor", in order to catch ignoring and ignore for i in unknown invalid ignor unrecognized 'not supported'; do $GREP -iq $i conftest.err if test "$?" = "0" ; then opal_cv_cc_wno_long_double="no" break; fi done fi ], [opal_cv_cc_wno_long_double="no"])], [opal_cv_cc_wno_long_double="no"]) ]) if test "$opal_cv_cc_wno_long_double" = "yes" ; then add="$add -Wno-long-double" fi # Per above, we know that this flag works with GCC / haven't # really tested it elsewhere. if test "$opal_c_vendor" = "gnu" ; then add="$add -Werror-implicit-function-declaration " fi CFLAGS="$CFLAGS_orig $add" OPAL_FLAGS_UNIQ(CFLAGS) AC_MSG_WARN([$add has been added to CFLAGS (--enable-picky)]) unset add fi # See if this version of gcc allows -finline-functions and/or # -fno-strict-aliasing. Even check the gcc-impersonating compilers. if test "$GCC" = "yes"; then CFLAGS_orig="$CFLAGS" # Note: Some versions of clang (at least >= 3.5 -- perhaps # older versions, too?) will *warn* about -finline-functions, # but still allow it. This is very annoying, so check for # that warning, too. The clang warning looks like this: # clang: warning: optimization flag '-finline-functions' is not supported # clang: warning: argument unused during compilation: '-finline-functions' CFLAGS="$CFLAGS_orig -finline-functions" add= AC_CACHE_CHECK([if $CC supports -finline-functions], [opal_cv_cc_finline_functions], [AC_TRY_COMPILE([], [], [opal_cv_cc_finline_functions="yes" if test -s conftest.err ; then for i in unused 'not supported' ; do if $GREP -iq "$i" conftest.err; then opal_cv_cc_finline_functions="no" break; fi done fi ], [opal_cv_cc_finline_functions="no"])]) if test "$opal_cv_cc_finline_functions" = "yes" ; then add=" -finline-functions" fi CFLAGS="$CFLAGS_orig$add" CFLAGS_orig="$CFLAGS" CFLAGS="$CFLAGS_orig -fno-strict-aliasing" add= AC_CACHE_CHECK([if $CC supports -fno-strict-aliasing], [opal_cv_cc_fno_strict_aliasing], [AC_TRY_COMPILE([], [], [opal_cv_cc_fno_strict_aliasing="yes"], [opal_cv_cc_fno_strict_aliasing="no"])]) if test "$opal_cv_cc_fno_strict_aliasing" = "yes" ; then add=" -fno-strict-aliasing" fi CFLAGS="$CFLAGS_orig$add" OPAL_FLAGS_UNIQ(CFLAGS) AC_MSG_WARN([$add has been added to CFLAGS]) unset add fi # Try to enable restrict keyword RESTRICT_CFLAGS= case "$opal_c_vendor" in intel) RESTRICT_CFLAGS="-restrict" ;; sgi) RESTRICT_CFLAGS="-LANG:restrict=ON" ;; esac if test ! -z "$RESTRICT_CFLAGS" ; then CFLAGS_orig="$CFLAGS" CFLAGS="$CFLAGS_orig $RESTRICT_CFLAGS" add= AC_CACHE_CHECK([if $CC supports $RESTRICT_CFLAGS], [opal_cv_cc_restrict_cflags], [AC_TRY_COMPILE([], [], [opal_cv_cc_restrict_cflags="yes"], [opal_cv_cc_restrict_cflags="no"])]) if test "$opal_cv_cc_restrict_cflags" = "yes" ; then add=" $RESTRICT_CFLAGS" fi CFLAGS="${CFLAGS_orig}${add}" OPAL_FLAGS_UNIQ([CFLAGS]) if test "$add" != "" ; then AC_MSG_WARN([$add has been added to CFLAGS]) fi unset add fi # see if the C compiler supports __builtin_expect AC_CACHE_CHECK([if $CC supports __builtin_expect], [opal_cv_cc_supports___builtin_expect], [AC_TRY_LINK([], [void *ptr = (void*) 0; if (__builtin_expect (ptr != (void*) 0, 1)) return 0;], [opal_cv_cc_supports___builtin_expect="yes"], [opal_cv_cc_supports___builtin_expect="no"])]) if test "$opal_cv_cc_supports___builtin_expect" = "yes" ; then have_cc_builtin_expect=1 else have_cc_builtin_expect=0 fi AC_DEFINE_UNQUOTED([OPAL_C_HAVE_BUILTIN_EXPECT], [$have_cc_builtin_expect], [Whether C compiler supports __builtin_expect]) # see if the C compiler supports __builtin_prefetch AC_CACHE_CHECK([if $CC supports __builtin_prefetch], [opal_cv_cc_supports___builtin_prefetch], [AC_TRY_LINK([], [int ptr; __builtin_prefetch(&ptr,0,0);], [opal_cv_cc_supports___builtin_prefetch="yes"], [opal_cv_cc_supports___builtin_prefetch="no"])]) if test "$opal_cv_cc_supports___builtin_prefetch" = "yes" ; then have_cc_builtin_prefetch=1 else have_cc_builtin_prefetch=0 fi AC_DEFINE_UNQUOTED([OPAL_C_HAVE_BUILTIN_PREFETCH], [$have_cc_builtin_prefetch], [Whether C compiler supports __builtin_prefetch]) # see if the C compiler supports __builtin_clz AC_CACHE_CHECK([if $CC supports __builtin_clz], [opal_cv_cc_supports___builtin_clz], [AC_TRY_LINK([], [int value = 0xffff; /* we know we have 16 bits set */ if ((8*sizeof(int)-16) != __builtin_clz(value)) return 0;], [opal_cv_cc_supports___builtin_clz="yes"], [opal_cv_cc_supports___builtin_clz="no"])]) if test "$opal_cv_cc_supports___builtin_clz" = "yes" ; then have_cc_builtin_clz=1 else have_cc_builtin_clz=0 fi AC_DEFINE_UNQUOTED([OPAL_C_HAVE_BUILTIN_CLZ], [$have_cc_builtin_clz], [Whether C compiler supports __builtin_clz]) # Preload the optflags for the case where the user didn't specify # any. If we're using GNU compilers, use -O3 (since it GNU # doesn't require all compilation units to be compiled with the # same level of optimization -- selecting a high level of # optimization is not prohibitive). If we're using anything else, # be conservative and just use -O. # # Note: gcc-impersonating compilers accept -O3 if test "$WANT_DEBUG" = "1"; then OPTFLAGS= else if test "$GCC" = yes; then OPTFLAGS="-O3" else OPTFLAGS="-O" fi fi OPAL_ENSURE_CONTAINS_OPTFLAGS("$OPAL_CFLAGS_BEFORE_PICKY") OPAL_CFLAGS_BEFORE_PICKY="$co_result" AC_MSG_CHECKING([for C optimization flags]) OPAL_ENSURE_CONTAINS_OPTFLAGS(["$CFLAGS"]) AC_MSG_RESULT([$co_result]) CFLAGS="$co_result" OPAL_VAR_SCOPE_POP ]) AC_DEFUN([_OPAL_START_SETUP_CC],[ opal_show_subtitle "C compiler and preprocessor" # $%@#!@#% AIX!! This has to be called before anything invokes the C # compiler. dnl AC_AIX ]) AC_DEFUN([_OPAL_PROG_CC],[ # # Check for the compiler # OPAL_VAR_SCOPE_PUSH([opal_cflags_save dummy opal_cc_arvgv0]) opal_cflags_save="$CFLAGS" AC_PROG_CC BASECC="`basename $CC`" CFLAGS="$opal_cflags_save" AC_DEFINE_UNQUOTED(OPAL_CC, "$CC", [OMPI underlying C compiler]) set dummy $CC opal_cc_argv0=[$]2 OPAL_WHICH([$opal_cc_argv0], [OPAL_CC_ABSOLUTE]) AC_SUBST(OPAL_CC_ABSOLUTE) OPAL_VAR_SCOPE_POP ])