2 # Sanity-test a C++ compiler.
4 # Copyright (C) 2004, 2006 Free Software Foundation, Inc.
6 # This program is free software: you can redistribute it and/or modify
7 # it under the terms of the GNU General Public License as published by
8 # the Free Software Foundation, either version 3 of the License, or
9 # (at your option) any later version.
11 # This program is distributed in the hope that it will be useful,
12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 # GNU General Public License for more details.
16 # You should have received a copy of the GNU General Public License
17 # along with this program. If not, see <http://www.gnu.org/licenses/>.
19 # Written by Paul Eggert.
21 AC_DEFUN([BISON_TEST_FOR_WORKING_CXX_COMPILER],
23 AC_CACHE_CHECK([whether $CXX builds executables that work],
33 using namespace std;],
36 typedef std::pair<unsigned int, int> uipair;
37 std::map<unsigned int, int> m;
38 std::map<unsigned int, int>::iterator i;
39 m.insert (uipair (4, -4));
40 for (i = m.begin (); i != m.end (); ++i)
43 [AS_IF([AC_TRY_COMMAND([$CXX -o conftest$ac_exeext $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_objext $LIBS >&AS_MESSAGE_LOG_FD])],
44 [AS_IF([test "$cross_compiling" = yes],
45 [bison_cv_cxx_works=cross],
46 [AS_IF([AC_TRY_COMMAND(./conftest$ac_exeext)],
47 [bison_cv_cxx_works=yes])])])
48 rm -f conftest$ac_exeext])
51 case $bison_cv_cxx_works in
55 BISON_CXX_WORKS='exit 77';;
58 AC_SUBST([BISON_CXX_WORKS])
59 AM_CONDITIONAL(BISON_CXX_WORKS, test $bison_cv_cxx_works = yes)