diff options
Diffstat (limited to 'Build/source/libs/zziplib/zziplib-src/m4/ax_cflags_strict_prototypes.m4')
-rw-r--r-- | Build/source/libs/zziplib/zziplib-src/m4/ax_cflags_strict_prototypes.m4 | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/Build/source/libs/zziplib/zziplib-src/m4/ax_cflags_strict_prototypes.m4 b/Build/source/libs/zziplib/zziplib-src/m4/ax_cflags_strict_prototypes.m4 new file mode 100644 index 00000000000..bd19c17962b --- /dev/null +++ b/Build/source/libs/zziplib/zziplib-src/m4/ax_cflags_strict_prototypes.m4 @@ -0,0 +1,136 @@ +dnl /usr/share/aclocal/guidod-cvs/ax_cflags_strict_prototypes.m4 +dnl @synopsis AX_CFLAGS_STRICT_PROTOTYPES [(shellvar [,default, [A/NA]] +dnl +dnl Try to find a compiler option that requires strict prototypes. +dnl +dnl The sanity check is done by looking at sys/signal.h which has a set +dnl of macro-definitions SIG_DFL and SIG_IGN that are cast to the local +dnl signal-handler type. If that signal-handler type is not fully +dnl qualified then the system headers are not seen as strictly +dnl prototype clean. +dnl +dnl For the GNU CC compiler it will be -fstrict-prototypes +dnl -Wstrict-prototypes The result is added to the shellvar being +dnl CFLAGS by default. +dnl +dnl DEFAULTS: +dnl +dnl - $1 shell-variable-to-add-to : CFLAGS +dnl - $2 add-value-if-not-found : nothing +dnl - $3 action-if-found : add value to shellvariable +dnl - $4 action-if-not-found : nothing +dnl +dnl @category C +dnl @author Guido U. Draheim <guidod@gmx.de> +dnl @version 2006-12-12 +dnl @license GPLWithACException + +AC_DEFUN([AX_CFLAGS_STRICT_PROTOTYPES],[dnl +AS_VAR_PUSHDEF([FLAGS],[CFLAGS])dnl +AS_VAR_PUSHDEF([VAR],[ac_cv_cflags_strict_prototypes])dnl +AC_CACHE_CHECK([m4_ifval($1,$1,FLAGS) for strict prototypes], +VAR,[VAR="no, unknown" + AC_LANG_SAVE + AC_LANG_C + ac_save_[]FLAGS="$[]FLAGS" +for ac_arg dnl +in "-pedantic % -fstrict-prototypes -Wstrict-prototypes" dnl GCC + "-pedantic % -Wstrict-prototypes" dnl try to warn atleast + "-pedantic % -Wmissing-prototypes" dnl or another warning + "-pedantic % -Werror-implicit-function-declaration" dnl + "-pedantic % -Wimplicit-function-declaration" dnl + # +do FLAGS="$ac_save_[]FLAGS "`echo $ac_arg | sed -e 's,%%.*,,' -e 's,%,,'` + AC_TRY_COMPILE([],[return 0;], + [VAR=`echo $ac_arg | sed -e 's,.*% *,,'` ; break]) +done +case ".$VAR" in + .|.no|.no,*) ;; + *) # sanity check with signal() from sys/signal.h + cp config.log config.tmp + AC_TRY_COMPILE([#include <signal.h>],[ + if (signal (SIGINT, SIG_IGN) == SIG_DFL) return 1; + if (signal (SIGINT, SIG_IGN) != SIG_DFL) return 2;], + dnl the original did use test -n `$CC testprogram.c` + [if test `diff config.log config.tmp | grep -i warning | wc -l` != 0 +then if test `diff config.log config.tmp | grep -i warning | wc -l` != 1 +then VAR="no, suppressed, signal.h," ; fi ; fi], + [VAR="no, suppressed, signal.h"]) + rm config.tmp + ;; +esac + FLAGS="$ac_save_[]FLAGS" + AC_LANG_RESTORE +]) +case ".$VAR" in + .ok|.ok,*) m4_ifvaln($3,$3) ;; + .|.no|.no,*) m4_ifvaln($4,$4,[m4_ifval($2,[ + AC_RUN_LOG([: m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $2"]) + m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $2"])]) ;; + *) m4_ifvaln($3,$3,[ + if echo " $[]m4_ifval($1,$1,FLAGS) " | grep " $VAR " 2>&1 >/dev/null + then AC_RUN_LOG([: m4_ifval($1,$1,FLAGS) does contain $VAR]) + else AC_RUN_LOG([: m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $VAR"]) + m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $VAR" + fi ]) ;; +esac +AS_VAR_POPDEF([VAR])dnl +AS_VAR_POPDEF([FLAGS])dnl +]) + +dnl the only difference - the LANG selection... and the default FLAGS + +AC_DEFUN([AX_CXXFLAGS_STRICT_PROTOTYPES],[dnl +AS_VAR_PUSHDEF([FLAGS],[CXXFLAGS])dnl +AS_VAR_PUSHDEF([VAR],[ac_cv_cxxflags_strict_prototypes])dnl +AC_CACHE_CHECK([m4_ifval($1,$1,FLAGS) for strict prototypes], +VAR,[VAR="no, unknown" + AC_LANG_SAVE + AC_LANG_CPLUSPLUS + ac_save_[]FLAGS="$[]FLAGS" +for ac_arg dnl +in "-pedantic -Werror % -fstrict-prototypes -Wstrict-prototypes" dnl GCC + "-pedantic -Werror % -Wstrict-prototypes" dnl try to warn atleast + "-pedantic -Werror % -Wmissing-prototypes" dnl try to warn atleast + "-pedantic -Werror % -Werror-implicit-function-declaration" dnl + "-pedantic -Werror % -Wimplicit-function-declaration" dnl + "-pedantic % -Wstrict-prototypes %% no, unsupported in C++" dnl oops + # +do FLAGS="$ac_save_[]FLAGS "`echo $ac_arg | sed -e 's,%%.*,,' -e 's,%,,'` + AC_TRY_COMPILE([],[return 0;], + [VAR=`echo $ac_arg | sed -e 's,.*% *,,'` ; break]) +done +case ".$VAR" in + .|.no|.no,*) ;; + *) # sanity check with signal() from sys/signal.h + cp config.log config.tmp + AC_TRY_COMPILE([#include <signal.h>],[ + if (signal (SIGINT, SIG_IGN) == SIG_DFL) return 1; + if (signal (SIGINT, SIG_IGN) != SIG_DFL) return 2;], + dnl the original did use test -n `$CC testprogram.c` + [if test `diff config.log config.tmp | grep -i warning | wc -l` != 0 +then if test `diff config.log config.tmp | grep -i warning | wc -l` != 1 +then VAR="no, suppressed, signal.h," ; fi ; fi], + [VAR="no, suppressed, signal.h"]) + rm config.tmp + ;; +esac + FLAGS="$ac_save_[]FLAGS" + AC_LANG_RESTORE +]) +case ".$VAR" in + .ok|.ok,*) m4_ifvaln($3,$3) ;; + .|.no|.no,*) m4_ifvaln($4,$4,[m4_ifval($2,[ + AC_RUN_LOG([: m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $2"]) + m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $2"])]) ;; + *) m4_ifvaln($3,$3,[ + if echo " $[]m4_ifval($1,$1,FLAGS) " | grep " $VAR " 2>&1 >/dev/null + then AC_RUN_LOG([: m4_ifval($1,$1,FLAGS) does contain $VAR]) + else AC_RUN_LOG([: m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $VAR"]) + m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $VAR" + fi ]) ;; +esac +AS_VAR_POPDEF([VAR])dnl +AS_VAR_POPDEF([FLAGS])dnl +]) + |