227 lines
7.6 KiB
Plaintext
227 lines
7.6 KiB
Plaintext
dnl ##
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dnl ## SA - OSSP Socket Abstraction Library
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dnl ## Copyright (c) 2001-2003 Ralf S. Engelschall <rse@engelschall.com>
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dnl ## Copyright (c) 2001-2003 The OSSP Project <http://www.ossp.org/>
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dnl ## Copyright (c) 2001-2003 Cable & Wireless Deutschland <http://www.cw.com/de/>
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dnl ##
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dnl ## This file is part of OSSP SA, a socket abstraction library which
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dnl ## can be found at http://www.ossp.org/pkg/sa/.
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dnl ##
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dnl ## Permission to use, copy, modify, and distribute this software for
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dnl ## any purpose with or without fee is hereby granted, provided that
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dnl ## the above copyright notice and this permission notice appear in all
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dnl ## copies.
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dnl ##
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dnl ## THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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dnl ## WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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dnl ## MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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dnl ## IN NO EVENT SHALL THE AUTHORS AND COPYRIGHT HOLDERS AND THEIR
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dnl ## CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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dnl ## SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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dnl ## LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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dnl ## USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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dnl ## ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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dnl ## OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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dnl ## OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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dnl ## SUCH DAMAGE.
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dnl ##
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dnl ## aclocal.m4: GNU Autoconf local macro definitions
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dnl ##
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dnl ##
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dnl ## Check whether compiler option works
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dnl ##
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dnl ## configure.in:
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dnl ## AC_COMPILER_OPTION(<name>, <display>, <option>,
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dnl ## <action-success>, <action-failure>)
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dnl ##
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AC_DEFUN(AC_COMPILER_OPTION,[dnl
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AC_MSG_CHECKING(whether compiler option(s) $2 work)
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AC_CACHE_VAL(ac_cv_compiler_option_$1,[
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SAVE_CFLAGS="$CFLAGS"
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CFLAGS="$CFLAGS $3"
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AC_TRY_COMPILE([],[], ac_cv_compiler_option_$1=yes, ac_cv_compiler_option_$1=no)
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CFLAGS="$SAVE_CFLAGS"
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])dnl
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if test ".$ac_cv_compiler_option_$1" = .yes; then
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ifelse([$4], , :, [$4])
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else
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ifelse([$5], , :, [$5])
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fi
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AC_MSG_RESULT([$ac_cv_compiler_option_$1])
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])dnl
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dnl ##
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dnl ## Debugging Support
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dnl ##
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dnl ## configure.in:
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dnl ## AC_CHECK_DEBUGGING
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dnl ##
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AC_DEFUN(AC_CHECK_DEBUGGING,[dnl
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AC_ARG_ENABLE(debug,dnl
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[ --enable-debug build for debugging (default=no)],
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[dnl
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if test ".$ac_cv_prog_gcc" = ".yes"; then
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case "$CFLAGS" in
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*-O* ) ;;
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* ) CFLAGS="$CFLAGS -O0" ;;
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esac
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case "$CFLAGS" in
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*-g* ) ;;
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* ) CFLAGS="$CFLAGS -g" ;;
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esac
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case "$CFLAGS" in
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*-pipe* ) ;;
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* ) AC_COMPILER_OPTION(pipe, -pipe, -pipe, CFLAGS="$CFLAGS -pipe") ;;
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esac
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AC_COMPILER_OPTION(defdbg, -DDEBUG, -DDEBUG, CFLAGS="$CFLAGS -DDEBUG")
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CFLAGS="$CFLAGS -pedantic"
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CFLAGS="$CFLAGS -Wall"
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WMORE="-Wpointer-arith -Wcast-align -Winline"
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WMORE="$WMORE -Wmissing-prototypes -Wmissing-declarations -Wnested-externs"
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AC_COMPILER_OPTION(wmore, -W<xxx>, $WMORE, CFLAGS="$CFLAGS $WMORE")
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AC_COMPILER_OPTION(wnolonglong, -Wno-long-long, -Wno-long-long, CFLAGS="$CFLAGS -Wno-long-long")
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else
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case "$CFLAGS" in
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*-g* ) ;;
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* ) CFLAGS="$CFLAGS -g" ;;
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esac
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fi
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msg="enabled"
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],[
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AC_COMPILER_OPTION(defnodbg, -DNDEBUG, -DNDEBUG, CFLAGS="$CFLAGS -DNDEBUG")
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if test ".$ac_cv_prog_gcc" = ".yes"; then
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case "$CFLAGS" in
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*-pipe* ) ;;
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* ) AC_COMPILER_OPTION(pipe, -pipe, -pipe, CFLAGS="$CFLAGS -pipe") ;;
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esac
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fi
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case "$CFLAGS" in
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*-g* ) CFLAGS=`echo "$CFLAGS" |\
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sed -e 's/ -g / /g' -e 's/ -g$//' -e 's/^-g //g' -e 's/^-g$//'` ;;
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esac
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case "$CXXFLAGS" in
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*-g* ) CXXFLAGS=`echo "$CXXFLAGS" |\
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sed -e 's/ -g / /g' -e 's/ -g$//' -e 's/^-g //g' -e 's/^-g$//'` ;;
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esac
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msg=disabled
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])dnl
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AC_MSG_CHECKING(for compilation debug mode)
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AC_MSG_RESULT([$msg])
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if test ".$msg" = .enabled; then
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enable_shared=no
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fi
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])
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dnl ##
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dnl ## Check for C99 va_copy() implementation
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dnl ## (and provide fallback implementation if neccessary)
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dnl ##
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dnl ## configure.in:
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dnl ## AC_CHECK_VA_COPY
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dnl ## foo.c:
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dnl ## #include "config.h"
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dnl ## [...]
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dnl ## va_copy(d,s)
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dnl ##
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dnl ## This check is rather complex: first because we really have to
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dnl ## try various possible implementations in sequence and second, we
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dnl ## cannot define a macro in config.h with parameters directly.
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dnl ##
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dnl # test program for va_copy() implementation
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changequote(<<,>>)
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m4_define(__va_copy_test, <<[
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#include <stdlib.h>
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#include <stdarg.h>
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#include <string.h>
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#define DO_VA_COPY(d, s) $1
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void test(char *str, ...)
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{
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va_list ap, ap2;
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int i;
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va_start(ap, str);
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DO_VA_COPY(ap2, ap);
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for (i = 1; i <= 9; i++) {
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int k = (int)va_arg(ap, int);
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if (k != i)
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abort();
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}
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DO_VA_COPY(ap, ap2);
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for (i = 1; i <= 9; i++) {
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int k = (int)va_arg(ap, int);
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if (k != i)
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abort();
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}
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va_end(ap);
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}
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int main(int argc, char *argv[])
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{
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test("test", 1, 2, 3, 4, 5, 6, 7, 8, 9);
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exit(0);
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}
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]>>)
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changequote([,])
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dnl # test driver for va_copy() implementation
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m4_define(__va_copy_check, [
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AH_VERBATIM($1,
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[/* Predefined possible va_copy() implementation (id: $1) */
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#define __VA_COPY_USE_$1(d, s) $2])
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if test ".$ac_cv_va_copy" = .; then
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AC_TRY_RUN(__va_copy_test($2), [ac_cv_va_copy="$1"])
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fi
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])
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dnl # Autoconf check for va_copy() implementation checking
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AC_DEFUN(AC_CHECK_VA_COPY,[
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dnl # provide Autoconf display check message
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AC_MSG_CHECKING(for va_copy() function)
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dnl # check for various implementations in priorized sequence
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AC_CACHE_VAL(ac_cv_va_copy, [
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ac_cv_va_copy=""
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dnl # 1. check for standardized C99 macro
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__va_copy_check(C99, [va_copy((d), (s))])
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dnl # 2. check for alternative/deprecated GCC macro
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__va_copy_check(GCM, [VA_COPY((d), (s))])
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dnl # 3. check for internal GCC macro (high-level define)
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__va_copy_check(GCH, [__va_copy((d), (s))])
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dnl # 4. check for internal GCC macro (built-in function)
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__va_copy_check(GCB, [__builtin_va_copy((d), (s))])
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dnl # 5. check for assignment approach (assuming va_list is a struct)
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__va_copy_check(ASS, [do { (d) = (s); } while (0)])
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dnl # 6. check for assignment approach (assuming va_list is a pointer)
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__va_copy_check(ASP, [do { *(d) = *(s); } while (0)])
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dnl # 7. check for memory copying approach (assuming va_list is a struct)
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__va_copy_check(CPS, [memcpy((void *)&(d), (void *)&(s)), sizeof((s))])
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dnl # 8. check for memory copying approach (assuming va_list is a pointer)
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__va_copy_check(CPP, [memcpy((void *)(d), (void *)(s)), sizeof(*(s))])
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if test ".$ac_cv_va_copy" = .; then
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AC_ERROR([no working implementation found])
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fi
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])
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dnl # optionally activate the fallback implementation
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if test ".$ac_cv_va_copy" = ".C99"; then
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AC_DEFINE(HAVE_VA_COPY, 1, [Define if va_copy() macro exists (and no fallback implementation is required)])
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fi
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dnl # declare which fallback implementation to actually use
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AC_DEFINE_UNQUOTED([__VA_COPY_USE], [__VA_COPY_USE_$ac_cv_va_copy],
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[Define to id of used va_copy() implementation])
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dnl # provide activation hook for fallback implementation
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AH_VERBATIM([__VA_COPY_ACTIVATION],
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[/* Optional va_copy() implementation activation */
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#ifndef HAVE_VA_COPY
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#define va_copy(d, s) __VA_COPY_USE(d, s)
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#endif
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])
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dnl # provide Autoconf display result message
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if test ".$ac_cv_va_copy" = ".C99"; then
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AC_MSG_RESULT([yes])
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else
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AC_MSG_RESULT([no (using fallback implementation)])
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fi
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])
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