tests: skip C++ tests if we can't compile a simple program

[bison.git] / tests / atlocal.in

# @configure_input@                                     -*- shell-script -*-
# Configurable variable values for Bison test suite.

# Copyright (C) 2000-2013 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 3 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, see <http://www.gnu.org/licenses/>.

# We need 'config.h'.
CPPFLAGS="-I$abs_top_builddir/lib @CPPFLAGS@"

# Don't just check if $POSIXLY_CORRECT is set, as Bash, when launched
# as /bin/sh, sets the shell variable POSIXLY_CORRECT to y, but not
# the environment variable.
if env | grep '^POSIXLY_CORRECT=' >/dev/null; then
  POSIXLY_CORRECT_IS_EXPORTED=true
else
  POSIXLY_CORRECT_IS_EXPORTED=false
fi

## ------------------- ##
## C/C++ Compilation.  ##
## ------------------- ##

: ${CC='@CC@'}
: ${CXX='@CXX@'}

# Is the compiler GCC?
GCC='@GCC@'

# Sometimes a test group needs to ignore gcc warnings, so it locally
# sets CFLAGS to this.
  NO_WERROR_CFLAGS='@CFLAGS@   @WARN_CFLAGS@   @WARN_CFLAGS_TEST@'
NO_WERROR_CXXFLAGS='@CXXFLAGS@ @WARN_CXXFLAGS@ @WARN_CXXFLAGS_TEST@'

# But most of the time, we want -Werror.
  CFLAGS="$NO_WERROR_CFLAGS   @WERROR_CFLAGS@"
CXXFLAGS="$NO_WERROR_CXXFLAGS @WERROR_CXXFLAGS@"

# If 'exit 77'; skip all C++ tests; otherwise ':'.
BISON_CXX_WORKS='@BISON_CXX_WORKS@'

# Be sure that the C++ compiler is not broken because of gnulib.  This
# cannot be checked in configure (gnulib is not parameterized yet),
# and checking this in every C++ test in AC_COMPILE_CXX is too costly.
#
# http://lists.gnu.org/archive/html/bug-bison/2013-06/msg00001.html
#
# FIXME: Check (say 2014) whether this is still needed.
if $BISON_CXX_WORKS; then
  # See AT_DATA_SOURCE_PROLOGUE.
  cat >conftest.cc <<EOF
#include <config.h>
/* We don't need perfect functions for these tests. */
#undef malloc
#undef memcmp
#undef realloc
#include <iostream>

int main ()
{
  std::cout << "Works" << std::endl;
}
EOF
  ls
  $CXX $CXXFLAGS $CPPFLAGS $LDFLAGS $LIBS -o conftest conftest.cc
  case $? in
   0);;
   *) BISON_CXX_WORKS="as_fn_error 77 cannot-compile-simple-program";;
  esac
  rm -f conftest*
fi

# Whether the compiler supports POSIXLY_CORRECT defined.
: ${C_COMPILER_POSIXLY_CORRECT='@C_COMPILER_POSIXLY_CORRECT@'}
: ${CXX_COMPILER_POSIXLY_CORRECT='@CXX_COMPILER_POSIXLY_CORRECT@'}

if $POSIXLY_CORRECT_IS_EXPORTED; then
  $C_COMPILER_POSIXLY_CORRECT ||
    BISON_C_WORKS="as_fn_error 77 POSIXLY_CORRECT"
  $CXX_COMPILER_POSIXLY_CORRECT ||
    BISON_CXX_WORKS="as_fn_error 77 POSIXLY_CORRECT"
fi

# Handle --compile-c-with-cxx here, once CXX and CXXFLAGS are known.
if "$at_arg_compile_c_with_cxx"; then
  CC_IS_CXX=1
  CC=$CXX
  NO_WERROR_CFLAGS=$NO_WERROR_CXXFLAGS
  CFLAGS=$CXXFLAGS
  BISON_C_WORKS=$BISON_CXX_WORKS
else
  CC_IS_CXX=0
fi


## ------- ##
## Other.  ##
## ------- ##

# Empty if no javac was found
CONF_JAVAC='@CONF_JAVAC@'

# Empty if no Java VM was found
CONF_JAVA='@CONF_JAVA@'

# We need egrep and perl.
: ${EGREP='@EGREP@'}
: ${PERL='@PERL@'}

# Use simple quotes (lib/quote.c).
LC_CTYPE=C
export LC_CTYPE

# Are special link options needed?
LDFLAGS='@LDFLAGS@'

# Are special libraries needed?
LIBS="$abs_top_builddir/lib/libbison.a @LIBS@ @INTLLIBS@"

# Empty if no xsltproc was found
: ${XSLTPROC='@XSLTPROC@'}

# Don't just check if $POSIXLY_CORRECT is set, as Bash, when launched
# as /bin/sh, sets the shell variable POSIXLY_CORRECT to y, but not
# the environment variable.
: ${C_COMPILER_POSIXLY_CORRECT='@C_COMPILER_POSIXLY_CORRECT@'}
if env | grep '^POSIXLY_CORRECT=' >/dev/null; then
  POSIXLY_CORRECT_IS_EXPORTED=true
else
  POSIXLY_CORRECT_IS_EXPORTED=false
fi