1dnl -*- shell-script -*-
2dnl
3dnl Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
4dnl                         University Research and Technology
5dnl                         Corporation.  All rights reserved.
6dnl Copyright (c) 2004-2005 The University of Tennessee and The University
7dnl                         of Tennessee Research Foundation.  All rights
8dnl                         reserved.
9dnl Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
10dnl                         University of Stuttgart.  All rights reserved.
11dnl Copyright (c) 2004-2005 The Regents of the University of California.
12dnl                         All rights reserved.
13dnl Copyright (c) 2008      Cisco Systems, Inc.  All rights reserved.
14dnl $COPYRIGHT$
15dnl
16dnl Additional copyrights may follow
17dnl
18dnl $HEADER$
19dnl
20
21AC_DEFUN([OMPI_CXX_FIND_EXCEPTION_FLAGS],[
22#
23# Arguments: none
24#
25# Dependencies: none
26#
27# Get the exception handling flags for the C++ compiler.  Leaves
28# CXXFLAGS undisturbed.
29# Provides --with-exflags command line argument for configure as well.
30#
31# Sets OMPI_CXX_EXCEPTION_CXXFLAGS and OMPI_CXX_EXCEPTION_LDFLAGS as
32# appropriate.
33# Must call AC_SUBST manually
34#
35
36# Command line flags
37
38AC_ARG_WITH(exflags,
39  AC_HELP_STRING([--with-exflags],
40                 [Specify flags necessary to enable C++ exceptions]),
41  ompi_force_exflags="$withval")
42
43ompi_CXXFLAGS_SAVE="$CXXFLAGS"
44AC_MSG_CHECKING([for compiler exception flags])
45
46# See which flags to use
47
48if test "$ompi_force_exflags" != ""; then
49
50    # If the user supplied flags, use those
51
52    ompi_exflags="$ompi_force_exflags"
53elif test "$GXX" = "yes"; then
54
55    # g++ has changed their flags a few times.  Sigh.
56
57    CXXFLAGS="$CXXFLAGS -fexceptions"
58
59    AC_LANG_SAVE
60    AC_LANG_CPLUSPLUS
61    AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[try { int i = 0; } catch(...) { int j = 2; }]])], ompi_happy=1, ompi_happy=0)
62
63    if test "$ompi_happy" = "1"; then
64	ompi_exflags="-fexceptions";
65    else
66	CXXFLAGS="$CXXFLAGS_SAVE -fhandle-exceptions"
67	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[try { int i = 0; } catch(...) { int j = 2; }]])], ompi_happy=1, ompi_happy=0)
68	if test "$ompi_happy" = "1"; then
69	    ompi_exflags="-fhandle-exceptions";
70	fi
71    fi
72    AC_LANG_RESTORE
73elif test "`basename $CXX`" = "KCC"; then
74
75    # KCC flags
76
77    ompi_exflags="--exceptions"
78fi
79CXXFLAGS="$ompi_CXXFLAGS_SAVE"
80
81# Save the result
82
83OMPI_CXX_EXCEPTIONS_CXXFLAGS="$ompi_exflags"
84OMPI_CXX_EXCEPTIONS_LDFLAGS="$ompi_exflags"
85if test "$ompi_exflags" = ""; then
86    AC_MSG_RESULT([none necessary])
87else
88    AC_MSG_RESULT([$ompi_exflags])
89fi
90
91# Clean up
92
93unset ompi_force_exflags ompi_CXXFLAGS_SAVE ompi_exflags ompi_happy])dnl
94
95