dnl @synopsis AX_PREFIX_CONFIG_H [(OUTPUT-HEADER [,PREFIX [,ORIG-HEADER]])] dnl dnl * this is a new variant from ac_prefix_config_ dnl this one will use a lowercase-prefix if dnl the config-define was starting with a lowercase-char, e.g. dnl #define const or #define restrict or #define off_t dnl (and this one can live in another directory, e.g. testpkg/config.h dnl therefore I decided to move the output-header to be the first arg) dnl dnl takes the usual config.h generated header file; looks for each of dnl the generated "#define SOMEDEF" lines, and prefixes the defined name dnl (ie. makes it "#define PREFIX_SOMEDEF". The result is written to dnl the output config.header file. The PREFIX is converted to uppercase dnl for the conversions. dnl dnl - default OUTPUT-HEADER = $PACKAGE-config.h dnl - default PREFIX = $PACKAGE dnl - default ORIG-HEADER, from AM_CONFIG_HEADER(config.h) dnl dnl Your configure.ac script should contain both macros in this order, dnl and unlike the earlier variations of this prefix-macro it is okay to dnl place the AX_PREFIX_CONFIG_H call before the AC_OUTPUT invokation. dnl dnl example: dnl AC_INIT(config.h.in) # config.h.in as created by "autoheader" dnl AM_INIT_AUTOMAKE(testpkg, 0.1.1) # makes #undef VERSION and PACKAGE dnl AM_CONFIG_HEADER(config.h) # prep config.h from config.h.in dnl AX_PREFIX_CONFIG_H(mylib/_config.h) # prep mylib/_config.h from it.. dnl AC_MEMORY_H # makes "#undef NEED_MEMORY_H" dnl AC_C_CONST_H # makes "#undef const" dnl AC_OUTPUT(Makefile) # creates the "config.h" now dnl # and also mylib/_config.h dnl dnl if the argument to AX_PREFIX_CONFIG_H would have been omitted then the dnl default outputfile would have been called simply "testpkg-config.h", but dnl even under the name "mylib/_config.h" it contains prefix-defines like dnl #ifndef TESTPKG_VERSION dnl #define TESTPKG_VERSION "0.1.1" dnl #endif dnl #ifndef TESTPKG_NEED_MEMORY_H dnl #define TESTPKG_NEED_MEMORY_H 1 dnl #endif dnl #ifndef _testpkg_const dnl #define _testpkg_const _const dnl #endif dnl dnl and this "mylib/_config.h" can be installed along with other dnl header-files, which is most convenient when creating a shared dnl library (that has some headers) where some functionality is dnl dependent on the OS-features detected at compile-time. No dnl need to invent some "mylib-confdefs.h.in" manually. :-) dnl dnl Note that some AC_DEFINEs that end up in the config.h file are dnl actually self-referential - e.g. AC_C_INLINE, AC_C_CONST, and the dnl AC_TYPE_OFF_T say that they "will define inline|const|off_t if the dnl system does not do it by itself". You might want to clean up about dnl these - consider an extra mylib/conf.h that reads something like: dnl dnl #include dnl #ifndef _testpkg_const dnl #define _testpkg_const const dnl #endif dnl dnl and then start using _testpkg_const in the header files. That is dnl also a good thing to differentiate whether some library-user has dnl starting to take up with a different compiler, so perhaps it could dnl read something like this: dnl dnl #ifdef _MSC_VER dnl #include dnl #else dnl #include dnl #endif dnl #ifndef _testpkg_const dnl #define _testpkg_const const dnl #endif dnl dnl @version $Id: ax_prefix_config_h.m4,v 1.2 2003/01/06 00:51 ac-archive-0.5.39 $ dnl @author Guiodo Draheim AC_DEFUN([AX_PREFIX_CONFIG_H],[AC_REQUIRE([AC_CONFIG_HEADER]) AC_CONFIG_COMMANDS([ifelse($1,,$PACKAGE-config.h,$1)],[dnl ac_prefix_conf_OUT=`echo ifelse($1, , $PACKAGE-config.h, $1)` ac_prefix_conf_DEF=`echo _$ac_prefix_conf_OUT | sed -e 'y:abcdefghijklmnopqrstuvwxyz./,-:ABCDEFGHIJKLMNOPQRSTUVWXYZ____:'` ac_prefix_conf_PKG=`echo ifelse($2, , $PACKAGE, $2)` ac_prefix_conf_LOW=`echo _$ac_prefix_conf_PKG | sed -e 'y:ABCDEFGHIJKLMNOPQRSTUVWXYZ-:abcdefghijklmnopqrstuvwxyz_:'` ac_prefix_conf_UPP=`echo $ac_prefix_conf_PKG | sed -e 'y:abcdefghijklmnopqrstuvwxyz-:ABCDEFGHIJKLMNOPQRSTUVWXYZ_:' -e '/^[0-9]/s/^/_/'` ac_prefix_conf_INP=`echo ifelse($3, , _, $3)` if test "$ac_prefix_conf_INP" = "_"; then for ac_file in : $CONFIG_HEADERS; do test "_$ac_file" = _: && continue test -f "$ac_prefix_conf_INP" && continue case $ac_file in *.h) test -f $ac_file && ac_prefix_conf_INP=$ac_file ;; *) esac done fi if test "$ac_prefix_conf_INP" = "_"; then case $ac_prefix_conf_OUT in */*) ac_prefix_conf_INP=`basename $ac_prefix_conf_OUT` ;; *-*) ac_prefix_conf_INP=`echo $ac_prefix_conf_OUT | sed -e 's/[a-zA-Z0-9_]*-//'` ;; *) ac_prefix_conf_INP=config.h ;; esac fi if test -z "$ac_prefix_conf_PKG" ; then AC_MSG_ERROR([no prefix for _PREFIX_PKG_CONFIG_H]) else AC_MSG_NOTICE(creating $ac_prefix_conf_OUT - prefix $ac_prefix_conf_UPP for $ac_prefix_conf_INP defines) if test -f $ac_prefix_conf_INP ; then echo '#ifndef '$ac_prefix_conf_DEF >$tmp/pconfig.h echo '#define '$ac_prefix_conf_DEF' 1' >>$tmp/pconfig.h echo ' ' >>$tmp/pconfig.h echo /'*' $ac_prefix_conf_OUT. Generated automatically at end of configure. '*'/ >>$tmp/pconfig.h echo 's/#undef *\([A-Z_]\)/#undef '$ac_prefix_conf_UPP'_\1/' >conftest.prefix echo 's/#undef *\([a-z]\)/#undef '$ac_prefix_conf_LOW'_\1/' >>conftest.prefix echo 's/#define *\([A-Z_][A-Za-z0-9_]*\)\(.*\)/#ifndef '$ac_prefix_conf_UPP"_\\1 \\" >>conftest.prefix echo '#define '$ac_prefix_conf_UPP"_\\1 \\2 \\" >>conftest.prefix echo '#endif/' >>conftest.prefix echo 's/#define *\([a-z][A-Za-z0-9_]*\)\(.*\)/#ifndef '$ac_prefix_conf_LOW"_\\1 \\" >>conftest.prefix echo '#define '$ac_prefix_conf_LOW"_\\1 \\2 \\" >>conftest.prefix echo '#endif/' >>conftest.prefix sed -f conftest.prefix $ac_prefix_conf_INP >>$tmp/pconfig.h echo ' ' >>$tmp/pconfig.h echo '/* once:' $ac_prefix_conf_DEF '*/' >>$tmp/pconfig.h echo '#endif' >>$tmp/pconfig.h if cmp -s $ac_prefix_conf_OUT $tmp/pconfig.h 2>/dev/null; then AC_MSG_NOTICE([$ac_prefix_conf_OUT is unchanged]) else ac_dir=`AS_DIRNAME(["$ac_prefix_conf_OUT"])` AS_MKDIR_P(["$ac_dir"]) rm -f $ac_prefix_conf_OUT mv $tmp/pconfig.h $ac_prefix_conf_OUT fi else AC_MSG_ERROR([input file $ac_prefix_conf_IN does not exist - dnl skip generating $ac_prefix_conf_OUT]) fi rm -f conftest.* fi ],[PACKAGE="$PACKAGE"])])