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) 2004-2006 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) 2006 Los Alamos National Security, LLC. All rights dnl reserved. dnl $COPYRIGHT$ dnl dnl Additional copyrights may follow dnl dnl $HEADER$ dnl # OMPI_SETUP_CXX() # ---------------- # Do everything required to setup the C++ compiler. Safe to AC_REQUIRE # this macro. AC_DEFUN([OMPI_SETUP_CXX],[ AC_REQUIRE([_OMPI_START_SETUP_CXX]) AC_REQUIRE([_OMPI_PROG_CXX]) # Do we want code coverage if test "$WANT_COVERAGE" = "1"; then if test "$ompi_cxx_vendor" = "gnu" ; then AC_MSG_WARN([$OMPI_COVERAGE_FLAGS has been added to CFLAGS (--enable-coverage)]) WANT_DEBUG=1 CXXFLAGS="${CXXFLAGS} $OMPI_COVERAGE_FLAGS" WRAPPER_EXTRA_CXXFLAGS="${WRAPPER_EXTRA_CXXFLAGS} $OMPI_COVERAGE_FLAGS" else AC_MSG_WARN([Code coverage functionality is currently available only with GCC suite]) AC_MSG_ERROR([Configure: cannot continue]) fi fi # Do we want debugging? if test "$WANT_DEBUG" = "1" -a "$enable_debug_symbols" != "no" ; then CXXFLAGS="$CXXFLAGS -g" OMPI_UNIQ(CXXFLAGS) AC_MSG_WARN([-g has been added to CXXFLAGS (--enable-debug)]) fi # These flags are generally g++-specific; even the g++-impersonating # compilers won't accept them. OMPI_CXXFLAGS_BEFORE_PICKY="$CXXFLAGS" if test "$WANT_PICKY_COMPILER" = 1 -a "$ompi_cxx_vendor" = "gnu"; then add="-Wall -Wundef -Wno-long-long" # see if -Wno-long-double works... AC_LANG_PUSH(C++) CXXFLAGS_orig="$CXXFLAGS" CXXFLAGS="$CXXFLAGS -Wno-long-double" AC_CACHE_CHECK([if $CXX supports -Wno-long-double], [ompi_cv_cxx_wno_long_double], [AC_TRY_COMPILE([], [], [ompi_cv_cxx_wno_long_double="yes"], [ompi_cv_cxx_wno_long_double="no"])]) CXXFLAGS="$CXXFLAGS_orig" AC_LANG_POP(C++) if test "$ompi_cv_cxx_wno_long_double" = "yes" ; then add="$add -Wno-long-double" fi CXXFLAGS="$CXXFLAGS $add" OMPI_UNIQ(CXXFLAGS) if test "$add" != "" ; then AC_MSG_WARN([$add has been added to CXXFLAGS (--enable-picky)]) fi unset add fi # See if this version of g++ allows -finline-functions if test "$GXX" = "yes"; then CXXFLAGS_orig="$CXXFLAGS" CXXFLAGS="$CXXFLAGS -finline-functions" add= AC_CACHE_CHECK([if $CXX supports -finline-functions], [ompi_cv_cxx_finline_functions], [AC_TRY_COMPILE([], [], [ompi_cv_cxx_finline_functions="yes"], [ompi_cv_cxx_finline_functions="no"])]) if test "$ompi_cv_cxx_finline_functions" = "yes" ; then add=" -finline-functions" fi CXXFLAGS="$CXXFLAGS_orig$add" OMPI_UNIQ(CXXFLAGS) if test "$add" != "" ; then AC_MSG_WARN([$add has been added to CXXFLAGS]) fi unset add fi # Check for special things due to C++ exceptions ENABLE_CXX_EXCEPTIONS=no HAVE_CXX_EXCEPTIONS=0 AC_ARG_ENABLE([cxx-exceptions], [AC_HELP_STRING([--enable-cxx-exceptions], [enable support for C++ exceptions])], [ENABLE_CXX_EXCEPTIONS="$enableval"]) AC_MSG_CHECKING([if want C++ exception handling]) AC_MSG_RESULT([$ENABLE_CXX_EXCEPTIONS]) if test "$ENABLE_CXX_EXCEPTIONS" = "yes"; then # config/cxx_have_exceptions.m4 OMPI_CXX_HAVE_EXCEPTIONS # config/cxx_find_exception_flags.m4 OMPI_CXX_FIND_EXCEPTION_FLAGS if test "$OMPI_CXX_EXCEPTIONS" = "1"; then HAVE_CXX_EXCEPTIONS=1 CFLAGS="$CFLAGS $OMPI_CXX_EXCEPTIONS_CFLAGS" FFLAGS="$FFLAGS $OMPI_CXX_EXCEPTIONS_FFLAGS" CXXFLAGS="$CXXFLAGS $OMPI_CXX_EXCEPTIONS_CXXFLAGS" LDFLAGS="$LDFLAGS $OMPI_CXX_EXCEPTIONS_LDFLAGS" WRAPPER_EXTRA_CFLAGS="$OMPI_CXX_EXCEPTIONS_CFLAGS ${WRAPPER_EXTRA_CFLAGS}" WRAPPER_EXTRA_FFLAGS="$OMPI_CXX_EXCEPTIONS_FFLAGS ${WRAPPER_EXTRA_FFLAGS}" WRAPPER_EXTRA_CXXFLAGS="$OMPI_CXX_EXCEPTIONS_CXXFLAGS ${WRAPPER_EXTRA_CXXFLAGS}" fi fi AC_DEFINE_UNQUOTED(OMPI_HAVE_CXX_EXCEPTION_SUPPORT, $HAVE_CXX_EXCEPTIONS, [Whether or not we have compiled with C++ exceptions support]) # Make sure we can link with the C compiler if[ test "$ompi_cv_cxx_compiler_vendor" != "microsoft" ]; then OMPI_LANG_LINK_WITH_C([C++], [], [cat <&2 ********************************************************************** * It appears that your C++ compiler is unable to link against object * files created by your C compiler. This generally indicates either * a conflict between the options specified in CFLAGS and CXXFLAGS * or a problem with the local compiler installation. More * information (including exactly what command was given to the * compilers and what error resulted when the commands were executed) is * available in the config.log file in this directory. ********************************************************************** EOF AC_MSG_ERROR([C and C++ compilers are not link compatible. Can not continue.])]) fi # Find some more characteristics of the C++ compiler # config/cxx_find_template_repository.m4 OMPI_CXX_FIND_TEMPLATE_REPOSITORY # config/cxx_find_template_parameters.m4 OMPI_CXX_FIND_TEMPLATE_PARAMETERS # see if the C++ compiler supports __builtin_expect AC_LANG_PUSH(C++) AC_CACHE_CHECK([if $CXX supports __builtin_expect], [ompi_cv_cxx_supports___builtin_expect], [AC_TRY_LINK([], [void *ptr = (void*) 0; if (__builtin_expect (ptr != (void*) 0, 1)) return 0;], [ompi_cv_cxx_supports___builtin_expect="yes"], [ompi_cv_cxx_supports___builtin_expect="no"])]) if test "$ompi_cv_cxx_supports___builtin_expect" = "yes" ; then have_builtin_expect=1 else have_builtin_expect=0 fi AC_DEFINE_UNQUOTED([OMPI_CXX_HAVE_BUILTIN_EXPECT], [$have_builtin_expect], [Whether C++ compiler supports __builtin_expect]) AC_LANG_POP(C++) # see if the C compiler supports __builtin_prefetch AC_LANG_PUSH(C++) AC_CACHE_CHECK([if $CXX supports __builtin_prefetch], [ompi_cv_cxx_supports___builtin_prefetch], [AC_TRY_LINK([], [int ptr; __builtin_prefetch(&ptr,0,0);], [ompi_cv_cxx_supports___builtin_prefetch="yes"], [ompi_cv_cxx_supports___builtin_prefetch="no"])]) if test "$ompi_cv_cxx_supports___builtin_prefetch" = "yes" ; then have_builtin_prefetch=1 else have_builtin_prefetch=0 fi AC_DEFINE_UNQUOTED([OMPI_CXX_HAVE_BUILTIN_PREFETCH], [$have_builtin_prefetch], [Whether C++ compiler supports __builtin_prefetch]) AC_LANG_POP(C++) # If we are on HP-UX, ensure that we're using aCC case "$host" in *hpux*) if test "$BASECXX" = "CC"; then AC_MSG_WARN([*** You will probably have problems compiling the MPI 2]) AC_MSG_WARN([*** C++ bindings with the HP-UX CC compiler. You should]) AC_MSG_WARN([*** probably be using the aCC compiler. Re-run configure]) AC_MSG_WARN([*** with the environment variable "CXX=aCC".]) fi ;; esac # see if the compiler supports const_cast of 2-dimensional arrays AC_LANG_PUSH(C++) AC_CACHE_CHECK([if $CXX supports const_cast<> properly], [ompi_cv_cxx_supports_2d_const_cast], [AC_TRY_COMPILE([int non_const_func(int ranges[][3]); int cast_test(const int ranges[][3]) { return non_const_func(const_cast(ranges)); }], [], [ompi_cv_cxx_supports_2d_const_cast="yes"], [ompi_cv_cxx_supports_2d_const_cast="no"])]) if test "$ompi_cv_cxx_supports_2d_const_cast" = "yes" ; then use_2d_const_cast=1 else use_2d_const_cast=0 fi AC_DEFINE_UNQUOTED([OMPI_CXX_SUPPORTS_2D_CONST_CAST], [$use_2d_const_cast], [Whether a const_cast on a 2-d array will work with the C++ compiler]) unset use_2d_const_cast AC_LANG_POP(C++) # Note: gcc-imperonating compilers accept -O3 if test "$WANT_DEBUG" = "1"; then OPTFLAGS= else if test "$GXX" = yes; then OPTFLAGS="-O3" else OPTFLAGS="-O" fi fi # config/ompi_check_optflags.m4 OMPI_CHECK_OPTFLAGS(["$CXXFLAGS"]) AC_MSG_CHECKING([for C++ optimization flags]) AC_MSG_RESULT([$co_result]) CXXFLAGS="$co_result" ]) AC_DEFUN([_OMPI_START_SETUP_CXX],[ ompi_show_subtitle "C++ compiler and preprocessor" ]) AC_DEFUN([_OMPI_PROG_CXX],[ ompi_cxxflags_save="$CXXFLAGS" AC_PROG_CXX AC_PROG_CXXCPP BASECXX="`basename $CXX`" CXXFLAGS="$ompi_cxxflags_save" AC_DEFINE_UNQUOTED(OMPI_CXX, "$CXX", [OMPI underlying C++ compiler]) OMPI_CXX_ABSOLUTE="`which $CXX`" AC_SUBST(OMPI_CXX_ABSOLUTE) OMPI_CXX_COMPILER_VENDOR([ompi_cxx_vendor]) # Make sure that the C++ compiler both works and is actually a C++ # compiler (if not cross-compiling). Don't just use the AC macro # so that we can have a pretty message. Do something here that # should force the linking of C++-specific things (e.g., STL # strings) so that we can force a hard check of compiling, # linking, and running a C++ application Note that some C # compilers, such as at least some versions of the GNU and Intel # compilers, will detect that the file extension is ".cc" and # therefore switch into a pseudo-C++ personality which works for # *compiling*, but does not work for *linking*. So in this test, # we want to cover the entire spectrum (compiling, linking, # running). if[ test "$ompi_cv_cxx_compiler_vendor" != "microsoft" ]; then OMPI_CHECK_COMPILER_WORKS([C++], [#include ], [std::string foo = "Hello, world"], [], [AC_MSG_ERROR([Could not run a simple C++ program. Aborting.])]) fi ])