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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) 2004-2005 The University of Tennessee and The University
dnl of Tennessee Research Foundation. All rights
dnl reserved.
dnl Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
dnl University of Stuttgart. All rights reserved.
dnl Copyright (c) 2004-2005 The Regents of the University of California.
dnl All rights reserved.
dnl Copyright (c) 2008 Cisco Systems, Inc. All rights reserved.
dnl $COPYRIGHT$
dnl
dnl Additional copyrights may follow
dnl
dnl $HEADER$
dnl
AC_DEFUN([OMPI_CXX_FIND_EXCEPTION_FLAGS],[
#
# Arguments: none
#
# Dependencies: none
#
# Get the exception handling flags for the C++ compiler. Leaves
# CXXFLAGS undisturbed.
# Provides --with-exflags command line argument for configure as well.
#
# Sets OMPI_CXX_EXCEPTION_CXXFLAGS and OMPI_CXX_EXCEPTION_LDFLAGS as
# appropriate.
# Must call AC_SUBST manually
#
# Command line flags
AC_ARG_WITH(exflags,
AC_HELP_STRING([--with-exflags],
[Specify flags necessary to enable C++ exceptions]),
ompi_force_exflags="$withval")
ompi_CXXFLAGS_SAVE="$CXXFLAGS"
AC_MSG_CHECKING([for compiler exception flags])
# See which flags to use
if test "$ompi_force_exflags" != ""; then
# If the user supplied flags, use those
ompi_exflags="$ompi_force_exflags"
elif test "$GXX" = "yes"; then
# g++ has changed their flags a few times. Sigh.
CXXFLAGS="$CXXFLAGS -fexceptions"
AC_LANG_SAVE
AC_LANG_CPLUSPLUS
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[try { int i = 0; } catch(...) { int j = 2; }]])], ompi_happy=1, ompi_happy=0)
if test "$ompi_happy" = "1"; then
ompi_exflags="-fexceptions";
else
CXXFLAGS="$CXXFLAGS_SAVE -fhandle-exceptions"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[try { int i = 0; } catch(...) { int j = 2; }]])], ompi_happy=1, ompi_happy=0)
if test "$ompi_happy" = "1"; then
ompi_exflags="-fhandle-exceptions";
fi
fi
AC_LANG_RESTORE
elif test "`basename $CXX`" = "KCC"; then
# KCC flags
ompi_exflags="--exceptions"
fi
CXXFLAGS="$ompi_CXXFLAGS_SAVE"
# Save the result
OMPI_CXX_EXCEPTIONS_CXXFLAGS="$ompi_exflags"
OMPI_CXX_EXCEPTIONS_LDFLAGS="$ompi_exflags"
if test "$ompi_exflags" = ""; then
AC_MSG_RESULT([none necessary])
else
AC_MSG_RESULT([$ompi_exflags])
fi
# Clean up
unset ompi_force_exflags ompi_CXXFLAGS_SAVE ompi_exflags ompi_happy])dnl
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