1# -*- Autoconf -*- 2# Sanity-test a C++ compiler. 3# 4# Copyright (C) 2004, 2006, 2009-2012 Free Software Foundation, Inc. 5# 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. 10# 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. 15# 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/>. 18 19# Written by Paul Eggert. 20 21AC_DEFUN([BISON_TEST_FOR_WORKING_CXX_COMPILER], 22[ 23 AC_CACHE_CHECK([whether $CXX builds executables that work], 24 bison_cv_cxx_works, 25 [AC_LANG_PUSH([C++]) 26 bison_cv_cxx_works=no 27 AC_COMPILE_IFELSE( 28 [AC_LANG_PROGRAM( 29 [#include <cstdlib> 30 #include <iostream> 31 #include <map> 32 #include <string> 33 using namespace std;], 34 [std::cerr << ""; 35 cout << ""; 36 typedef std::pair<unsigned int, int> uipair; 37 std::map<unsigned int, int> m; 38 std::map<unsigned int, int>::iterator i; 39 m.insert (uipair (4, -4)); 40 for (i = m.begin (); i != m.end (); ++i) 41 if (i->first != 4) 42 return 1;])], 43 [AS_IF([AC_TRY_COMMAND([$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]) 49 AC_LANG_POP([C++])]) 50 51 case $bison_cv_cxx_works in 52 yes) 53 BISON_CXX_WORKS=':';; 54 no | cross) 55 BISON_CXX_WORKS='exit 77';; 56 esac 57 58 AC_SUBST([BISON_CXX_WORKS]) 59 AM_CONDITIONAL(BISON_CXX_WORKS, test $bison_cv_cxx_works = yes) 60]) 61 62# BISON_CXX_COMPILER_POSIXLY_CORRECT 63# ---------------------------------- 64# Whether the C++ compiler supports -g in POSIXLY_CORRECT mode. 65AC_DEFUN([BISON_CXX_COMPILER_POSIXLY_CORRECT], 66[AC_LANG_PUSH([C++]) 67BISON_LANG_COMPILER_POSIXLY_CORRECT 68AC_LANG_POP([C++]) 69]) 70