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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) 2006 Los Alamos National Security, LLC. All rights
dnl reserved.
dnl Copyright (c) 2007-2009 Sun Microsystems, Inc. All rights reserved.
dnl Copyright (c) 2008-2013 Cisco Systems, Inc. All rights reserved.
dnl Copyright (c) 2015-2016 Research Organization for Information Science
dnl and Technology (RIST). All rights reserved.
dnl $COPYRIGHT$
dnl
dnl Additional copyrights may follow
dnl
dnl $HEADER$
dnl
# This macro is necessary to get the title to be displayed first. :-)
AC_DEFUN([OPAL_SETUP_CXX_BANNER],[
opal_show_subtitle "C++ compiler and preprocessor"
])
# This macro is necessary because PROG_CXX* is REQUIREd by multiple
# places in SETUP_CXX.
AC_DEFUN([OPAL_PROG_CXX],[
OPAL_VAR_SCOPE_PUSH([opal_cxxflags_save])
opal_cxxflags_save="$CXXFLAGS"
AC_PROG_CXX
AC_PROG_CXXCPP
CXXFLAGS="$opal_cxxflags_save"
OPAL_VAR_SCOPE_POP
])
# OPAL_SETUP_CXX()
# ----------------
# Do everything required to setup the C++ compiler. Safe to AC_REQUIRE
# this macro.
AC_DEFUN([OPAL_SETUP_CXX],[
AC_REQUIRE([OPAL_SETUP_CXX_BANNER])
_OPAL_SETUP_CXX_COMPILER
OPAL_CXX_COMPILER_VENDOR([opal_cxx_vendor])
_OPAL_SETUP_CXX_COMPILER_BACKEND
])
# _OPAL_SETUP_CXX_COMPILER()
# --------------------------
# Setup the CXX compiler
AC_DEFUN([_OPAL_SETUP_CXX_COMPILER],[
OPAL_VAR_SCOPE_PUSH(opal_cxx_compiler_works)
# Must REQUIRE the PROG_CXX macro and not call it directly here for
# reasons well-described in the AC2.64 (and beyond) docs.
AC_REQUIRE([OPAL_PROG_CXX])
BASECXX="`basename $CXX`"
AS_IF([test "x$CXX" = "x"], [CXX=none])
set dummy $CXX
opal_cxx_argv0=[$]2
OPAL_WHICH([$opal_cxx_argv0], [OPAL_CXX_ABSOLUTE])
AS_IF([test "x$OPAL_CXX_ABSOLUTE" = "x"], [OPAL_CXX_ABSOLUTE=none])
AC_DEFINE_UNQUOTED(OPAL_CXX, "$CXX", [OPAL underlying C++ compiler])
AC_SUBST(OPAL_CXX_ABSOLUTE)
OPAL_VAR_SCOPE_POP
])
# _OPAL_SETUP_CXX_COMPILER_BACKEND()
# ----------------------------------
# Back end of _OPAL_SETUP_CXX_COMPILER_BACKEND()
AC_DEFUN([_OPAL_SETUP_CXX_COMPILER_BACKEND],[
# Do we want code coverage
if test "$WANT_COVERAGE" = "1"; then
if test "$opal_cxx_vendor" = "gnu" ; then
AC_MSG_WARN([$OPAL_COVERAGE_FLAGS has been added to CFLAGS (--enable-coverage)])
WANT_DEBUG=1
CXXFLAGS="${CXXFLAGS} $OPAL_COVERAGE_FLAGS"
OPAL_WRAPPER_FLAGS_ADD([CXXFLAGS], [$OPAL_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 "$WANT_DEBUG" = "1" && test "$enable_debug_symbols" != "no" ; then
CXXFLAGS="$CXXFLAGS -g"
OPAL_FLAGS_UNIQ(CXXFLAGS)
AC_MSG_WARN([-g has been added to CXXFLAGS (--enable-debug)])
fi
# These flags are generally g++-specific; even the g++-impersonating
# compilers won't accept them.
OPAL_CXXFLAGS_BEFORE_PICKY="$CXXFLAGS"
if test "$WANT_PICKY_COMPILER" = 1 && test "$opal_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 $add -Wno-long-double -fstrict-prototype"
AC_CACHE_CHECK([if $CXX supports -Wno-long-double],
[opal_cv_cxx_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_cxx_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 ; do
$GREP -iq $i conftest.err
if test "$?" = "0" ; then
opal_cv_cxx_wno_long_double="no"
break;
fi
done
fi
],
[opal_cv_cxx_wno_long_double="no"])],
[opal_cv_cxx_wno_long_double="no"])
])
CXXFLAGS="$CXXFLAGS_orig"
AC_LANG_POP(C++)
if test "$opal_cv_cxx_wno_long_double" = "yes" ; then
add="$add -Wno-long-double"
fi
CXXFLAGS="$CXXFLAGS $add"
OPAL_FLAGS_UNIQ(CXXFLAGS)
if test "$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_LANG_PUSH(C++)
AC_CACHE_CHECK([if $CXX supports -finline-functions],
[opal_cv_cxx_finline_functions],
[AC_TRY_COMPILE([], [],
[opal_cv_cxx_finline_functions="yes"],
[opal_cv_cxx_finline_functions="no"])])
AC_LANG_POP(C++)
if test "$opal_cv_cxx_finline_functions" = "yes" ; then
add=" -finline-functions"
fi
CXXFLAGS="$CXXFLAGS_orig$add"
OPAL_FLAGS_UNIQ(CXXFLAGS)
if test "$add" != "" ; then
AC_MSG_WARN([$add has been added to CXXFLAGS])
fi
unset add
fi
# Make sure we can link with the C compiler
if test "$opal_cv_cxx_compiler_vendor" != "microsoft"; then
OPAL_LANG_LINK_WITH_C([C++], [],
[cat <<EOF >&2
**********************************************************************
* It appears that your C++ compiler is unable to link against object
* files created by your C compiler. This generally indicates either
* a conflict between the options specified in CFLAGS and CXXFLAGS
* or a problem with the local compiler installation. More
* information (including exactly what command was given to the
* compilers and what error resulted when the commands were executed) is
* available in the config.log file in this directory.
**********************************************************************
EOF
AC_MSG_ERROR([C and C++ compilers are not link compatible. Can not continue.])])
fi
# If we are on HP-UX, ensure that we're using aCC
case "$host" in
*hpux*)
if test "$BASECXX" = "CC"; then
AC_MSG_WARN([*** You will probably have problems compiling the MPI 2])
AC_MSG_WARN([*** C++ bindings with the HP-UX CC compiler. You should])
AC_MSG_WARN([*** probably be using the aCC compiler. Re-run configure])
AC_MSG_WARN([*** with the environment variable "CXX=aCC".])
fi
;;
esac
# Note: gcc-imperonating compilers accept -O3
if test "$WANT_DEBUG" = "1"; then
OPTFLAGS=
else
if test "$GXX" = yes; then
OPTFLAGS="-O3"
else
OPTFLAGS="-O"
fi
fi
# config/opal_ensure_contains_optflags.m4
OPAL_ENSURE_CONTAINS_OPTFLAGS(["$CXXFLAGS"])
AC_MSG_CHECKING([for C++ optimization flags])
AC_MSG_RESULT([$co_result])
CXXFLAGS="$co_result"
# bool type size and alignment
AC_LANG_PUSH(C++)
AC_CHECK_SIZEOF(bool)
OPAL_C_GET_ALIGNMENT(bool, OPAL_ALIGNMENT_CXX_BOOL)
AC_LANG_POP(C++)
])
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