79 lines
2.9 KiB
Text
79 lines
2.9 KiB
Text
# Sanity test a C compiler.
|
|
|
|
# Copyright (C) 2006, 2009-2012 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/>.
|
|
|
|
# Written by Paul Eggert.
|
|
|
|
AC_DEFUN([BISON_TEST_FOR_WORKING_C_COMPILER], [
|
|
AC_COMPILE_IFELSE(
|
|
[AC_LANG_PROGRAM(
|
|
[[#include <limits.h>
|
|
int test_array[CHAR_BIT];]])],
|
|
[],
|
|
[AC_MSG_FAILURE([cannot compile a simple C program])])
|
|
AC_SUBST([BISON_C_WORKS], [:])
|
|
])
|
|
|
|
# BISON_CHECK_WITH_POSIXLY_CORRECT(CODE)
|
|
# --------------------------------------
|
|
# Run the Autoconf CODE with POSIXLY_CORRECT set to 1, and restored to
|
|
# its initial value afterwards.
|
|
AC_DEFUN([BISON_CHECK_WITH_POSIXLY_CORRECT],
|
|
[gl_awk_probe='BEGIN { if ("POSIXLY_CORRECT" in ENVIRON) print "x" }'
|
|
case ${POSIXLY_CORRECT+x}`$AWK "$gl_awk_probe" </dev/null` in
|
|
xx) gl_had_POSIXLY_CORRECT=exported ;;
|
|
x) gl_had_POSIXLY_CORRECT=yes ;;
|
|
*) gl_had_POSIXLY_CORRECT= ;;
|
|
esac
|
|
POSIXLY_CORRECT=1
|
|
export POSIXLY_CORRECT
|
|
$1
|
|
case $gl_had_POSIXLY_CORRECT in
|
|
exported) ;;
|
|
yes) AS_UNSET([POSIXLY_CORRECT]); POSIXLY_CORRECT=1 ;;
|
|
*) AS_UNSET([POSIXLY_CORRECT]) ;;
|
|
esac
|
|
])
|
|
|
|
# BISON_LANG_COMPILER_POSIXLY_CORRECT
|
|
# -----------------------------------
|
|
# Whether the compiler for the current language supports -g in
|
|
# POSIXLY_CORRECT mode. clang-2.9 on OS X does not, because
|
|
# "clang-mp-2.9 -o test -g test.c" launches "/usr/bin/dsymutil test -o
|
|
# test.dSYM" which fails with "error: unable to open executable '-o'".
|
|
#
|
|
# Sets <LANG>_COMPILER_POSIXLY_CORRECT to true/false.
|
|
AC_DEFUN([BISON_LANG_COMPILER_POSIXLY_CORRECT],
|
|
[AC_CACHE_CHECK([whether $_AC_CC supports POSIXLY_CORRECT=1],
|
|
[bison_cv_[]_AC_LANG_ABBREV[]_supports_posixly_correct],
|
|
[BISON_CHECK_WITH_POSIXLY_CORRECT(
|
|
[AC_LINK_IFELSE([AC_LANG_PROGRAM],
|
|
[bison_cv_[]_AC_LANG_ABBREV[]_supports_posixly_correct=yes],
|
|
[bison_cv_[]_AC_LANG_ABBREV[]_supports_posixly_correct=no])])])
|
|
case $bison_cv_[]_AC_LANG_ABBREV[]_supports_posixly_correct in
|
|
yes) AC_SUBST(_AC_LANG_PREFIX[_COMPILER_POSIXLY_CORRECT], [true]) ;;
|
|
no) AC_SUBST(_AC_LANG_PREFIX[_COMPILER_POSIXLY_CORRECT], [false]);;
|
|
esac
|
|
])
|
|
|
|
# BISON_C_COMPILER_POSIXLY_CORRECT
|
|
# --------------------------------
|
|
# Whether the C compiler supports -g in POSIXLY_CORRECT mode.
|
|
AC_DEFUN([BISON_C_COMPILER_POSIXLY_CORRECT],
|
|
[AC_LANG_PUSH([C])
|
|
BISON_LANG_COMPILER_POSIXLY_CORRECT
|
|
AC_LANG_POP([C])
|
|
])
|