1dnl ## 2dnl ## OSSP ex - Exception Handling 3dnl ## Copyright (c) 2002-2007 Ralf S. Engelschall <rse@engelschall.com> 4dnl ## Copyright (c) 2002-2007 The OSSP Project <http://www.ossp.org/> 5dnl ## 6dnl ## This file is part of OSSP ex, an exception handling library 7dnl ## which can be found at http://www.ossp.org/pkg/lib/ex/. 8dnl ## 9dnl ## Permission to use, copy, modify, and distribute this software for 10dnl ## any purpose with or without fee is hereby granted, provided that 11dnl ## the above copyright notice and this permission notice appear in all 12dnl ## copies. 13dnl ## 14dnl ## THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED 15dnl ## WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 16dnl ## MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17dnl ## IN NO EVENT SHALL THE AUTHORS AND COPYRIGHT HOLDERS AND THEIR 18dnl ## CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 19dnl ## SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 20dnl ## LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 21dnl ## USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 22dnl ## ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 23dnl ## OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 24dnl ## OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25dnl ## SUCH DAMAGE. 26dnl ## 27dnl ## aclocal.m4: GNU Autoconf local macro definitions 28dnl ## 29 30dnl ## 31dnl ## Check whether compiler option works 32dnl ## 33dnl ## configure.in: 34dnl ## AC_COMPILER_OPTION(<name>, <display>, <option>, 35dnl ## <action-success>, <action-failure>) 36dnl ## 37 38AC_DEFUN(AC_COMPILER_OPTION,[dnl 39AC_MSG_CHECKING(whether compiler option(s) $2 work) 40AC_CACHE_VAL(ac_cv_compiler_option_$1,[ 41SAVE_CFLAGS="$CFLAGS" 42CFLAGS="$CFLAGS $3" 43AC_TRY_COMPILE([],[], ac_cv_compiler_option_$1=yes, ac_cv_compiler_option_$1=no) 44CFLAGS="$SAVE_CFLAGS" 45])dnl 46if test ".$ac_cv_compiler_option_$1" = .yes; then 47 ifelse([$4], , :, [$4]) 48else 49 ifelse([$5], , :, [$5]) 50fi 51AC_MSG_RESULT([$ac_cv_compiler_option_$1]) 52])dnl 53 54dnl ## 55dnl ## Debugging Support 56dnl ## 57dnl ## configure.in: 58dnl ## AC_CHECK_DEBUGGING 59dnl ## 60 61AC_DEFUN(AC_CHECK_DEBUGGING,[dnl 62AC_ARG_ENABLE(debug,dnl 63[ --enable-debug build for debugging (default=no)], 64[dnl 65if test ".$ac_cv_prog_gcc" = ".yes"; then 66 case "$CFLAGS" in 67 *-O* ) ;; 68 * ) CFLAGS="$CFLAGS -O2" ;; 69 esac 70 case "$CFLAGS" in 71 *-g* ) ;; 72 * ) CFLAGS="$CFLAGS -g" ;; 73 esac 74 case "$CFLAGS" in 75 *-pipe* ) ;; 76 * ) AC_COMPILER_OPTION(pipe, -pipe, -pipe, CFLAGS="$CFLAGS -pipe") ;; 77 esac 78 AC_COMPILER_OPTION(defdbg, -DDEBUG, -DDEBUG, CFLAGS="$CFLAGS -DDEBUG") 79 AC_COMPILER_OPTION(ggdb3, -ggdb3, -ggdb3, CFLAGS="$CFLAGS -ggdb3") 80 CFLAGS="$CFLAGS -pedantic" 81 CFLAGS="$CFLAGS -Wall" 82 WMORE="-Wshadow -Wpointer-arith -Wcast-align -Winline" 83 WMORE="$WMORE -Wmissing-prototypes -Wmissing-declarations -Wnested-externs" 84 AC_COMPILER_OPTION(wmore, -W<xxx>, $WMORE, CFLAGS="$CFLAGS $WMORE") 85 AC_COMPILER_OPTION(wnolonglong, -Wno-long-long, -Wno-long-long, CFLAGS="$CFLAGS -Wno-long-long") 86else 87 case "$CFLAGS" in 88 *-g* ) ;; 89 * ) CFLAGS="$CFLAGS -g" ;; 90 esac 91fi 92msg="enabled" 93],[ 94if test ".$ac_cv_prog_gcc" = ".yes"; then 95case "$CFLAGS" in 96 *-pipe* ) ;; 97 * ) AC_COMPILER_OPTION(pipe, -pipe, -pipe, CFLAGS="$CFLAGS -pipe") ;; 98esac 99fi 100case "$CFLAGS" in 101 *-g* ) CFLAGS=`echo "$CFLAGS" |\ 102 sed -e 's/ -g / /g' -e 's/ -g$//' -e 's/^-g //g' -e 's/^-g$//'` ;; 103esac 104case "$CXXFLAGS" in 105 *-g* ) CXXFLAGS=`echo "$CXXFLAGS" |\ 106 sed -e 's/ -g / /g' -e 's/ -g$//' -e 's/^-g //g' -e 's/^-g$//'` ;; 107esac 108msg=disabled 109])dnl 110AC_MSG_CHECKING(for compilation debug mode) 111AC_MSG_RESULT([$msg]) 112if test ".$msg" = .enabled; then 113 enable_shared=no 114fi 115]) 116 117dnl ## 118dnl ## Check for C99 va_copy() implementation 119dnl ## (and provide fallback implementation if neccessary) 120dnl ## 121dnl ## configure.in: 122dnl ## AC_CHECK_VA_COPY 123dnl ## foo.c: 124dnl ## #include "config.h" 125dnl ## [...] 126dnl ## va_copy(d,s) 127dnl ## 128dnl ## This check is rather complex: first because we really have to 129dnl ## try various possible implementations in sequence and second, we 130dnl ## cannot define a macro in config.h with parameters directly. 131dnl ## 132 133dnl # test program for va_copy() implementation 134changequote(<<,>>) 135m4_define(__va_copy_test, <<[ 136#include <stdlib.h> 137#include <stdarg.h> 138#include <string.h> 139#define DO_VA_COPY(d, s) $1 140void test(char *str, ...) 141{ 142 va_list ap, ap2; 143 int i; 144 va_start(ap, str); 145 DO_VA_COPY(ap2, ap); 146 for (i = 1; i <= 9; i++) { 147 int k = (int)va_arg(ap, int); 148 if (k != i) 149 abort(); 150 } 151 DO_VA_COPY(ap, ap2); 152 for (i = 1; i <= 9; i++) { 153 int k = (int)va_arg(ap, int); 154 if (k != i) 155 abort(); 156 } 157 va_end(ap); 158} 159int main(int argc, char *argv[]) 160{ 161 test("test", 1, 2, 3, 4, 5, 6, 7, 8, 9); 162 exit(0); 163} 164]>>) 165changequote([,]) 166 167dnl # test driver for va_copy() implementation 168m4_define(__va_copy_check, [ 169 AH_VERBATIM($1, 170[/* Predefined possible va_copy() implementation (id: $1) */ 171#define __VA_COPY_USE_$1(d, s) $2]) 172 if test ".$ac_cv_va_copy" = .; then 173 AC_TRY_RUN(__va_copy_test($2), [ac_cv_va_copy="$1"]) 174 fi 175]) 176 177dnl # Autoconf check for va_copy() implementation checking 178AC_DEFUN(AC_CHECK_VA_COPY,[ 179 dnl # provide Autoconf display check message 180 AC_MSG_CHECKING(for va_copy() function) 181 dnl # check for various implementations in priorized sequence 182 AC_CACHE_VAL(ac_cv_va_copy, [ 183 ac_cv_va_copy="" 184 dnl # 1. check for standardized C99 macro 185 __va_copy_check(C99, [va_copy((d), (s))]) 186 dnl # 2. check for alternative/deprecated GCC macro 187 __va_copy_check(GCM, [VA_COPY((d), (s))]) 188 dnl # 3. check for internal GCC macro (high-level define) 189 __va_copy_check(GCH, [__va_copy((d), (s))]) 190 dnl # 4. check for internal GCC macro (built-in function) 191 __va_copy_check(GCB, [__builtin_va_copy((d), (s))]) 192 dnl # 5. check for assignment approach (assuming va_list is a struct) 193 __va_copy_check(ASS, [do { (d) = (s); } while (0)]) 194 dnl # 6. check for assignment approach (assuming va_list is a pointer) 195 __va_copy_check(ASP, [do { *(d) = *(s); } while (0)]) 196 dnl # 7. check for memory copying approach (assuming va_list is a struct) 197 __va_copy_check(CPS, [memcpy((void *)&(d), (void *)&(s)), sizeof((s))]) 198 dnl # 8. check for memory copying approach (assuming va_list is a pointer) 199 __va_copy_check(CPP, [memcpy((void *)(d), (void *)(s)), sizeof(*(s))]) 200 if test ".$ac_cv_va_copy" = .; then 201 AC_ERROR([no working implementation found]) 202 fi 203 ]) 204 dnl # optionally activate the fallback implementation 205 if test ".$ac_cv_va_copy" = ".C99"; then 206 AC_DEFINE(HAVE_VA_COPY, 1, [Define if va_copy() macro exists (and no fallback implementation is required)]) 207 fi 208 dnl # declare which fallback implementation to actually use 209 AC_DEFINE_UNQUOTED([__VA_COPY_USE], [__VA_COPY_USE_$ac_cv_va_copy], 210 [Define to id of used va_copy() implementation]) 211 dnl # provide activation hook for fallback implementation 212 AH_VERBATIM([__VA_COPY_ACTIVATION], 213[/* Optional va_copy() implementation activation */ 214#ifndef HAVE_VA_COPY 215#define va_copy(d, s) __VA_COPY_USE(d, s) 216#endif 217]) 218 dnl # provide Autoconf display result message 219 if test ".$ac_cv_va_copy" = ".C99"; then 220 AC_MSG_RESULT([yes]) 221 else 222 AC_MSG_RESULT([no (using fallback implementation)]) 223 fi 224]) 225 226