ossp-pkg/ex/aclocal.m4
dnl ##
dnl ## OSSP ex - Exception Handling
dnl ## Copyright (c) 2002-2007 Ralf S. Engelschall <rse@engelschall.com>
dnl ## Copyright (c) 2002-2007 The OSSP Project <http://www.ossp.org/>
dnl ##
dnl ## This file is part of OSSP ex, an exception handling library
dnl ## which can be found at http://www.ossp.org/pkg/lib/ex/.
dnl ##
dnl ## Permission to use, copy, modify, and distribute this software for
dnl ## any purpose with or without fee is hereby granted, provided that
dnl ## the above copyright notice and this permission notice appear in all
dnl ## copies.
dnl ##
dnl ## THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
dnl ## WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
dnl ## MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
dnl ## IN NO EVENT SHALL THE AUTHORS AND COPYRIGHT HOLDERS AND THEIR
dnl ## CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
dnl ## SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
dnl ## LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
dnl ## USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
dnl ## ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
dnl ## OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
dnl ## OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
dnl ## SUCH DAMAGE.
dnl ##
dnl ## aclocal.m4: GNU Autoconf local macro definitions
dnl ##
dnl ##
dnl ## Check whether compiler option works
dnl ##
dnl ## configure.in:
dnl ## AC_COMPILER_OPTION(<name>, <display>, <option>,
dnl ## <action-success>, <action-failure>)
dnl ##
AC_DEFUN(AC_COMPILER_OPTION,[dnl
AC_MSG_CHECKING(whether compiler option(s) $2 work)
AC_CACHE_VAL(ac_cv_compiler_option_$1,[
SAVE_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS $3"
AC_TRY_COMPILE([],[], ac_cv_compiler_option_$1=yes, ac_cv_compiler_option_$1=no)
CFLAGS="$SAVE_CFLAGS"
])dnl
if test ".$ac_cv_compiler_option_$1" = .yes; then
ifelse([$4], , :, [$4])
else
ifelse([$5], , :, [$5])
fi
AC_MSG_RESULT([$ac_cv_compiler_option_$1])
])dnl
dnl ##
dnl ## Debugging Support
dnl ##
dnl ## configure.in:
dnl ## AC_CHECK_DEBUGGING
dnl ##
AC_DEFUN(AC_CHECK_DEBUGGING,[dnl
AC_ARG_ENABLE(debug,dnl
[ --enable-debug build for debugging (default=no)],
[dnl
if test ".$ac_cv_prog_gcc" = ".yes"; then
case "$CFLAGS" in
*-O* ) ;;
* ) CFLAGS="$CFLAGS -O2" ;;
esac
case "$CFLAGS" in
*-g* ) ;;
* ) CFLAGS="$CFLAGS -g" ;;
esac
case "$CFLAGS" in
*-pipe* ) ;;
* ) AC_COMPILER_OPTION(pipe, -pipe, -pipe, CFLAGS="$CFLAGS -pipe") ;;
esac
AC_COMPILER_OPTION(defdbg, -DDEBUG, -DDEBUG, CFLAGS="$CFLAGS -DDEBUG")
AC_COMPILER_OPTION(ggdb3, -ggdb3, -ggdb3, CFLAGS="$CFLAGS -ggdb3")
CFLAGS="$CFLAGS -pedantic"
CFLAGS="$CFLAGS -Wall"
WMORE="-Wshadow -Wpointer-arith -Wcast-align -Winline"
WMORE="$WMORE -Wmissing-prototypes -Wmissing-declarations -Wnested-externs"
AC_COMPILER_OPTION(wmore, -W<xxx>, $WMORE, CFLAGS="$CFLAGS $WMORE")
AC_COMPILER_OPTION(wnolonglong, -Wno-long-long, -Wno-long-long, CFLAGS="$CFLAGS -Wno-long-long")
else
case "$CFLAGS" in
*-g* ) ;;
* ) CFLAGS="$CFLAGS -g" ;;
esac
fi
msg="enabled"
],[
if test ".$ac_cv_prog_gcc" = ".yes"; then
case "$CFLAGS" in
*-pipe* ) ;;
* ) AC_COMPILER_OPTION(pipe, -pipe, -pipe, CFLAGS="$CFLAGS -pipe") ;;
esac
fi
case "$CFLAGS" in
*-g* ) CFLAGS=`echo "$CFLAGS" |\
sed -e 's/ -g / /g' -e 's/ -g$//' -e 's/^-g //g' -e 's/^-g$//'` ;;
esac
case "$CXXFLAGS" in
*-g* ) CXXFLAGS=`echo "$CXXFLAGS" |\
sed -e 's/ -g / /g' -e 's/ -g$//' -e 's/^-g //g' -e 's/^-g$//'` ;;
esac
msg=disabled
])dnl
AC_MSG_CHECKING(for compilation debug mode)
AC_MSG_RESULT([$msg])
if test ".$msg" = .enabled; then
enable_shared=no
fi
])
dnl ##
dnl ## Check for C99 va_copy() implementation
dnl ## (and provide fallback implementation if neccessary)
dnl ##
dnl ## configure.in:
dnl ## AC_CHECK_VA_COPY
dnl ## foo.c:
dnl ## #include "config.h"
dnl ## [...]
dnl ## va_copy(d,s)
dnl ##
dnl ## This check is rather complex: first because we really have to
dnl ## try various possible implementations in sequence and second, we
dnl ## cannot define a macro in config.h with parameters directly.
dnl ##
dnl # test program for va_copy() implementation
changequote(<<,>>)
m4_define(__va_copy_test, <<[
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#define DO_VA_COPY(d, s) $1
void test(char *str, ...)
{
va_list ap, ap2;
int i;
va_start(ap, str);
DO_VA_COPY(ap2, ap);
for (i = 1; i <= 9; i++) {
int k = (int)va_arg(ap, int);
if (k != i)
abort();
}
DO_VA_COPY(ap, ap2);
for (i = 1; i <= 9; i++) {
int k = (int)va_arg(ap, int);
if (k != i)
abort();
}
va_end(ap);
}
int main(int argc, char *argv[])
{
test("test", 1, 2, 3, 4, 5, 6, 7, 8, 9);
exit(0);
}
]>>)
changequote([,])
dnl # test driver for va_copy() implementation
m4_define(__va_copy_check, [
AH_VERBATIM($1,
[/* Predefined possible va_copy() implementation (id: $1) */
#define __VA_COPY_USE_$1(d, s) $2])
if test ".$ac_cv_va_copy" = .; then
AC_TRY_RUN(__va_copy_test($2), [ac_cv_va_copy="$1"])
fi
])
dnl # Autoconf check for va_copy() implementation checking
AC_DEFUN(AC_CHECK_VA_COPY,[
dnl # provide Autoconf display check message
AC_MSG_CHECKING(for va_copy() function)
dnl # check for various implementations in priorized sequence
AC_CACHE_VAL(ac_cv_va_copy, [
ac_cv_va_copy=""
dnl # 1. check for standardized C99 macro
__va_copy_check(C99, [va_copy((d), (s))])
dnl # 2. check for alternative/deprecated GCC macro
__va_copy_check(GCM, [VA_COPY((d), (s))])
dnl # 3. check for internal GCC macro (high-level define)
__va_copy_check(GCH, [__va_copy((d), (s))])
dnl # 4. check for internal GCC macro (built-in function)
__va_copy_check(GCB, [__builtin_va_copy((d), (s))])
dnl # 5. check for assignment approach (assuming va_list is a struct)
__va_copy_check(ASS, [do { (d) = (s); } while (0)])
dnl # 6. check for assignment approach (assuming va_list is a pointer)
__va_copy_check(ASP, [do { *(d) = *(s); } while (0)])
dnl # 7. check for memory copying approach (assuming va_list is a struct)
__va_copy_check(CPS, [memcpy((void *)&(d), (void *)&(s), sizeof((s)))])
dnl # 8. check for memory copying approach (assuming va_list is a pointer)
__va_copy_check(CPP, [memcpy((void *)(d), (void *)(s), sizeof(*(s)))])
if test ".$ac_cv_va_copy" = .; then
AC_ERROR([no working implementation found])
fi
])
dnl # optionally activate the fallback implementation
if test ".$ac_cv_va_copy" = ".C99"; then
AC_DEFINE(HAVE_VA_COPY, 1, [Define if va_copy() macro exists (and no fallback implementation is required)])
fi
dnl # declare which fallback implementation to actually use
AC_DEFINE_UNQUOTED([__VA_COPY_USE], [__VA_COPY_USE_$ac_cv_va_copy],
[Define to id of used va_copy() implementation])
dnl # provide activation hook for fallback implementation
AH_VERBATIM([__VA_COPY_ACTIVATION],
[/* Optional va_copy() implementation activation */
#ifndef HAVE_VA_COPY
#define va_copy(d, s) __VA_COPY_USE(d, s)
#endif
])
dnl # provide Autoconf display result message
if test ".$ac_cv_va_copy" = ".C99"; then
AC_MSG_RESULT([yes])
else
AC_MSG_RESULT([no (using fallback implementation)])
fi
])
