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dnl @synopsis AC_CREATE_PREFIX_CONFIG_H [(OUTPUT-HEADER [,PREFIX [,ORIG-HEADER]])]
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dnl this is a new variant from ac_prefix_config_
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dnl this one will use a lowercase-prefix if
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dnl the config-define was starting with a lowercase-char, e.g.
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dnl #define const or #define restrict or #define off_t
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dnl (and this one can live in another directory, e.g. testpkg/config.h
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dnl therefore I decided to move the output-header to be the first arg)
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dnl takes the usual config.h generated header file; looks for each of
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dnl the generated "#define SOMEDEF" lines, and prefixes the defined name
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dnl (ie. makes it "#define PREFIX_SOMEDEF". The result is written to
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dnl the output config.header file. The PREFIX is converted to uppercase
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dnl for the conversions.
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dnl default OUTPUT-HEADER = $PACKAGE-config.h
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dnl default PREFIX = $PACKAGE
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dnl default ORIG-HEADER, derived from OUTPUT-HEADER
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dnl if OUTPUT-HEADER has a "/", use the basename
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dnl if OUTPUT-HEADER has a "-", use the section after it.
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dnl otherwise, just config.h
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dnl In most cases, the configure.in will contain a line saying
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dnl AC_CONFIG_HEADER(config.h)
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dnl somewhere *before* AC_OUTPUT and a simple line saying
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dnl AC_PREFIX_CONFIG_HEADER
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dnl somewhere *after* AC_OUTPUT.
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dnl AC_INIT(config.h.in) # config.h.in as created by "autoheader"
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dnl AM_INIT_AUTOMAKE(testpkg, 0.1.1) # "#undef VERSION" and "PACKAGE"
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dnl AM_CONFIG_HEADER(config.h) # in config.h.in
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dnl AC_MEMORY_H # "#undef NEED_MEMORY_H"
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dnl AC_C_CONST_H # "#undef const"
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dnl AC_OUTPUT(Makefile) # creates the "config.h" now
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dnl AC_CREATE_PREFIX_CONFIG_H # creates "testpkg-config.h"
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dnl and the resulting "testpkg-config.h" contains lines like
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dnl #ifndef TESTPKG_VERSION
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dnl #define TESTPKG_VERSION "0.1.1"
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dnl #ifndef TESTPKG_NEED_MEMORY_H
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dnl #define TESTPKG_NEED_MEMORY_H 1
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dnl #ifndef _testpkg_const
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dnl #define _testpkg_const const
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dnl and this "testpkg-config.h" can be installed along with other
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dnl header-files, which is most convenient when creating a shared
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dnl library (that has some headers) where some functionality is
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dnl dependent on the OS-features detected at compile-time. No
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dnl need to invent some "testpkg-confdefs.h.in" manually. :-)
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dnl @version $Id: AC_CREATE_PREFIX_CONFIG_H.m4,v 1.5 2002/07/30 23:09:22 bastiaan Exp $
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dnl @author Guido Draheim <guidod@gmx.de>
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AC_DEFUN([AC_CREATE_PREFIX_CONFIG_H],
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ac_prefix_conf_OUT=`echo ifelse($1, , ${PACKAGE_TARNAME}-config.h, $1)`
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ac_prefix_conf_DEF=`echo _$ac_prefix_conf_OUT | sed -e 'y:abcdefghijklmnopqrstuvwxyz./,-:ABCDEFGHIJKLMNOPQRSTUVWXYZ____:'`
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ac_prefix_conf_PKG=`echo ifelse($2, , ${PACKAGE_TARNAME}, $2)`
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ac_prefix_conf_LOW=`echo _$ac_prefix_conf_PKG | sed -e 'y:ABCDEFGHIJKLMNOPQRSTUVWXYZ-:abcdefghijklmnopqrstuvwxyz_:'`
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ac_prefix_conf_UPP=`echo $ac_prefix_conf_PKG | sed -e 'y:abcdefghijklmnopqrstuvwxyz-:ABCDEFGHIJKLMNOPQRSTUVWXYZ_:' -e '/^[0-9]/s/^/_/'`
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ac_prefix_conf_INP=`echo ifelse($3, , _, $3)`
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if test "$ac_prefix_conf_INP" = "_"; then
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case $ac_prefix_conf_OUT in
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*/*) ac_prefix_conf_INP=`basename $ac_prefix_conf_OUT`
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*-*) ac_prefix_conf_INP=`echo $ac_prefix_conf_OUT | sed -e 's/[a-zA-Z0-9_]*-//'`
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*) ac_prefix_conf_INP=config.h
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if test -z "$ac_prefix_conf_PKG" ; then
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AC_MSG_ERROR([no prefix for _PREFIX_PKG_CONFIG_H])
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AC_MSG_RESULT(creating $ac_prefix_conf_OUT - prefix $ac_prefix_conf_UPP for $ac_prefix_conf_INP defines)
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if test -f $ac_prefix_conf_INP ; then
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AS_DIRNAME([/* automatically generated */], $ac_prefix_conf_OUT)
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echo '#ifndef '$ac_prefix_conf_DEF >$ac_prefix_conf_OUT
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echo '#define '$ac_prefix_conf_DEF' 1' >>$ac_prefix_conf_OUT
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echo ' ' >>$ac_prefix_conf_OUT
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echo /'*' $ac_prefix_conf_OUT. Generated automatically at end of configure. '*'/ >>$ac_prefix_conf_OUT
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echo 's/#undef *\([A-Z_]\)/#undef '$ac_prefix_conf_UPP'_\1/' >conftest.sed
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echo 's/#undef *\([a-z]\)/#undef '$ac_prefix_conf_LOW'_\1/' >>conftest.sed
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echo 's/#define *\([A-Z_][A-Za-z0-9_]*\)\(.*\)/#ifndef '$ac_prefix_conf_UPP"_\\1 \\" >>conftest.sed
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echo '#define '$ac_prefix_conf_UPP"_\\1 \\2 \\" >>conftest.sed
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echo '#endif/' >>conftest.sed
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echo 's/#define *\([a-z][A-Za-z0-9_]*\)\(.*\)/#ifndef '$ac_prefix_conf_LOW"_\\1 \\" >>conftest.sed
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echo '#define '$ac_prefix_conf_LOW"_\\1 \\2 \\" >>conftest.sed
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echo '#endif/' >>conftest.sed
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sed -f conftest.sed $ac_prefix_conf_INP >>$ac_prefix_conf_OUT
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echo ' ' >>$ac_prefix_conf_OUT
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echo '/*' $ac_prefix_conf_DEF '*/' >>$ac_prefix_conf_OUT
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echo '#endif' >>$ac_prefix_conf_OUT
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AC_MSG_ERROR([input file $ac_prefix_conf_IN does not exist, dnl
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skip generating $ac_prefix_conf_OUT])
added
removed
m4/AC_CREATE_PREFIX_CONFIG_H.m4
