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dnl ------ compiler.m4 ------
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dnl Check CC specific characteristics
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dnl $1 is the $CC option to check for.
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dnl $2 is a boolean value (1 for true or 0 for false),
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dnl whether the option should be activated in
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dnl CFLAGS if available
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dnl Defaults to true, if not specified
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AC_DEFUN([GGI_CC_CHECK4_OPTION],
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AC_MSG_CHECKING([if $CC has -$1 option])
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AC_LANG_PROGRAM([[#include <stdio.h>]],
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[[printf("Hello World\n");]])
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if test $activate -eq 0 -o "$cc_tmp" != "yes"; then
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AC_MSG_RESULT([$cc_tmp])
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AS_VAR_SET(AS_TR_SH(m4_tolower([cc_has_$1])), $cc_tmp)
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dnl Check if -Werror-implicit-function-declaration kills the build.
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dnl AIX 4.2 is missing a prototype for (at least) snprintf.
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dnl Cygwin 1.5.11 is missing a prototype for (at least) siginterrupt.
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dnl HP/UX 11.11 is missing a prototype for (at least) strtoull.
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dnl True64 (version?) is missing a prototype for (at least) strtoull.
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AC_DEFUN([GGI_CHECK_IMPLICIT_DECLARATIONS],
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dnl First check, if we _have_ -Werror-implicit-function-declaration
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GGI_CC_CHECK4_OPTION([Werror-implicit-function-declaration], 0)
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if test "$cc_has_werror_implicit_function_declaration" = "yes"; then
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ggi_test_funcs="strncasecmp snprintf siginterrupt strtoull"
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dnl Now check for some headers ...
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AC_CHECK_HEADERS([string.h strings.h signal.h])
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dnl ... for the declarations
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for func in $ggi_test_funcs; do
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AC_CHECK_DECLS($func,[],[],
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dnl ... and for the symbols.
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AC_CHECK_FUNCS($ggi_test_funcs)
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AC_MSG_CHECKING([if the system is missing declarations])
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for func in $ggi_test_funcs; do
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decl_var=AS_TR_SH([ac_cv_have_decl_$func])
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func_var=AS_TR_SH([ac_cv_func_$func])
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if eval "test \"x\${$decl_var}\" = \"xno\" -a \
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\"x\${$func_var}\" = \"xyes\""; then
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cc_has_werror_implicit_function_declaration="no"
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dnl When we can use -Werror-implicit-function-declaration, then
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dnl there are no declarations missing. Thus the result output
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if test $cc_has_werror_implicit_function_declaration = "yes"; then
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dnl ----- dllext.m4 -----
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dnl Suffix detection for runtime loadable libraries.
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AC_DEFUN([GGI_DLLEXT],
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AC_MSG_CHECKING([for shared library extension])
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*-*-mingw* | *-*-cygwin*)
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AC_MSG_RESULT([$DLLEXT])
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dnl ------ extrapaths.m4 ------
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dnl Let user add extra includes and libs
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AC_DEFUN([GGI_EXTRA_PATHS],
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AC_ARG_WITH([extra-includes],
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[ --with-extra-includes=DIR
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add extra include paths (separator ':')],
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use_extra_includes="$withval",
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use_extra_includes=NO
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if test -n "$use_extra_includes" && \
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test "$use_extra_includes" != "NO"; then
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for dir in ${use_extra_includes} ; do
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if test -d "$dir" ; then
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extra_includes="$extra_includes -I$dir"
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extra_includes="$extra_includes -include $dir"
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CPPFLAGS="$CPPFLAGS $extra_includes"
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AC_ARG_WITH([extra-libs],
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[ --with-extra-libs=DIR add extra library paths (separator ':')],
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use_extra_libs="$withval",
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if test -n "$use_extra_libs" && \
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test "$use_extra_libs" != "NO"; then
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for dir in $use_extra_libs; do
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if test -d "$dir" ; then
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extra_libraries="$extra_libraries -L$dir"
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extra_libraries="$extra_libraries -l$dir"
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LDFLAGS="$LDFLAGS $extra_libraries"
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AC_SUBST(extra_includes)
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AC_SUBST(extra_libraries)
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dnl ------ os.m4 ------
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dnl Add your OS here, if not listed
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AC_DEFUN([GGI_CHECKOS],
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AM_CONDITIONAL(OS_WIN32, [test $os = "os_win32_cygwin" -o $os = "os_win32_mingw" -o $os = "os_win32_pw32"])
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AM_CONDITIONAL(OS_WIN32_CYGWIN, test $os = "os_win32_cygwin")
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AM_CONDITIONAL(OS_WIN32_MINGW, test $os = "os_win32_mingw")
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AM_CONDITIONAL(OS_WIN32_PW32, test $os = "os_win32_pw32")
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AM_CONDITIONAL(OS_DARWIN, test $os = "os_darwin")
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AM_CONDITIONAL(OS_FREEBSD, test $os = "os_freebsd")
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AM_CONDITIONAL(OS_LINUX, test $os = "os_linux")
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AM_CONDITIONAL(OS_NETBSD, test $os = "os_netbsd")
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AM_CONDITIONAL(OS_OPENBSD, test $os = "os_openbsd")
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AM_CONDITIONAL(OS_SOLARIS, test $os = "os_solaris")
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AM_CONDITIONAL(OS_AIX, test $os = "os_aix")
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AM_CONDITIONAL(OS_DEFAULT, test $os = "os_default")
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dnl ------ rellibdir.m4 -----
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dnl Find a relative path that takes us from static_sysconfdir/ggi_subdir
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dnl to static_libdir/ggi_subdir.
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dnl This macro is easily fooled with //, /./ and /../ combinations.
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dnl Also, I'm very far from a script guru. This macro can probably
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dnl be written in a couple of lines if you know the right script
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AC_DEFUN([GGI_SYSCONF_TO_LIB],
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rel_ggisysconfdir="$static_sysconfdir/$ggi_subdir"
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rel_ggilibdir="$static_libdir/$ggi_subdir"
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until test "$again" = "no"; do
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for cdir in $rel_ggisysconfdir; do
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if test -n "$again"; then
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if test -n "$newcdir"; then
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newcdir="$newcdir/$cdir"
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for ldir in $rel_ggilibdir; do
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if test -z "$again"; then
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if test "$ldir" = "$cdir"; then
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if test -n "$newldir"; then
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newldir="$newldir/$ldir"
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rel_ggisysconfdir="$newcdir"
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rel_ggilibdir="$newldir"
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for cdir in $rel_ggisysconfdir; do
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rel_ggilibdir="../$rel_ggilibdir"
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ggi_sysconfdir_to_libdir="$rel_ggilibdir"
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dnl ----- strings.m4 -----
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dnl Check for safe and secure string functions
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AC_DEFUN([GGI_CHECK_STRING_FUNCS],
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dnl strings.h exists on SYSV systems
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dnl and contains strcasecmp() and strncasecmp()
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AC_CHECK_HEADERS(string.h strings.h)
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AC_CHECK_FUNCS([strcasecmp strncasecmp \
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strncat strncpy snprintf vsnprintf \
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strlcpy strlcat asprintf \
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strtol strtoul strtoll strtoull])
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dnl ----- checklib.m4 -----
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dnl Check for libs using libtool
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AC_DEFUN([GGI_CHECK_LIB],
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CC="$SHELL ./libtool --mode=link $CC"
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AC_CHECK_LIB($1, $2, [
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dnl ----- checkint.m4 -----
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dnl Add fallback if C99 inttypes are not there...
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AC_DEFUN([GGI_NEED_INTTYPES],
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if test "$ac_cv_header_inttypes_h" != "yes"; then
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AC_DEFINE(GG_NEED_INTTYPES, 1,
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[Tell libgg to define integer types when building])
added
removed
m4/common.m4
