diff options
Diffstat (limited to 'm4/cxx.m4')
| -rw-r--r-- | m4/cxx.m4 | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/m4/cxx.m4 b/m4/cxx.m4 new file mode 100644 index 00000000..bae56520 --- /dev/null +++ b/m4/cxx.m4 @@ -0,0 +1,62 @@ +# -*- Autoconf -*- +# Sanity-test a C++ compiler. +# +# Copyright (C) 2004, 2006 Free Software Foundation, Inc. +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, write to the Free Software +# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +# 02110-1301 USA + +# Written by Paul Eggert. + +AC_DEFUN([BISON_TEST_FOR_WORKING_CXX_COMPILER], +[ + AC_CACHE_CHECK([whether $CXX builds executables that work], + bison_cv_cxx_works, + [AC_LANG_PUSH([C++]) + bison_cv_cxx_works=no + AC_COMPILE_IFELSE( + [AC_LANG_PROGRAM( + [#include <cstdlib> + #include <iostream> + #include <map> + #include <string> + using namespace std;], + [std::cerr << ""; + cout << ""; + typedef std::pair<unsigned int, int> uipair; + std::map<unsigned int, int> m; + std::map<unsigned int, int>::iterator i; + m.insert (uipair (4, -4)); + for (i = m.begin (); i != m.end (); ++i) + if (i->first != 4) + return 1;])], + [AS_IF([AC_TRY_COMMAND([$CXX -o conftest$ac_exeext $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_objext $LIBS >&AS_MESSAGE_LOG_FD])], + [AS_IF([test "$cross_compiling" = yes], + [bison_cv_cxx_works=cross], + [AS_IF([AC_TRY_COMMAND(./conftest$ac_exeext)], + [bison_cv_cxx_works=yes])])]) + rm -f conftest$ac_exeext]) + AC_LANG_POP([C++])]) + + case $bison_cv_cxx_works in + yes) + BISON_CXX_WORKS=':';; + no | cross) + BISON_CXX_WORKS='exit 77';; + esac + + AC_SUBST([BISON_CXX_WORKS]) + AM_CONDITIONAL(BISON_CXX_WORKS, test $bison_cv_cxx_works = yes) +]) |