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dnl @synopsis AC_CREATE_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, derived from OUTPUT-HEADER
dnl if OUTPUT-HEADER has a "/", use the basename
dnl if OUTPUT-HEADER has a "-", use the section after it.
dnl otherwise, just config.h
dnl
dnl In most cases, the configure.in will contain a line saying
dnl AC_CONFIG_HEADER(config.h)
dnl somewhere *before* AC_OUTPUT and a simple line saying
dnl AC_PREFIX_CONFIG_HEADER
dnl somewhere *after* AC_OUTPUT.
dnl
dnl example:
dnl AC_INIT(config.h.in) # config.h.in as created by "autoheader"
dnl AM_INIT_AUTOMAKE(testpkg, 0.1.1) # "#undef VERSION" and "PACKAGE"
dnl AM_CONFIG_HEADER(config.h) # in config.h.in
dnl AC_MEMORY_H # "#undef NEED_MEMORY_H"
dnl AC_C_CONST_H # "#undef const"
dnl AC_OUTPUT(Makefile) # creates the "config.h" now
dnl AC_CREATE_PREFIX_CONFIG_H # creates "testpkg-config.h"
dnl and the resulting "testpkg-config.h" contains lines 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 "testpkg-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 "testpkg-confdefs.h.in" manually. :-)
dnl
dnl @version $Id: ac_create_prefix_config_h.m4,v 1.1 2001/06/17 15:47:32 bastiaan Exp $
dnl @author Guido Draheim <guidod@gmx.de>
AC_DEFUN([AC_CREATE_PREFIX_CONFIG_H],
[changequote({, })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
case $ac_prefix_conf_OUT in
*/*) ac_prefix_conf_INP=`basename $ac_prefix_conf_OUT`
;;
*-*) ac_prefix_conf_INP=`echo $ac_prefix_conf_OUT | sed -e 's/[a-zA-Z0-9_]*-//'`
;;
*) ac_prefix_conf_INP=config.h
;;
esac
fi
changequote([, ])dnl
if test -z "$ac_prefix_conf_PKG" ; then
AC_MSG_ERROR([no prefix for _PREFIX_PKG_CONFIG_H])
else
AC_MSG_RESULT(creating $ac_prefix_conf_OUT - prefix $ac_prefix_conf_UPP for $ac_prefix_conf_INP defines)
if test -f $ac_prefix_conf_INP ; then
AS_DIRNAME([/* automatically generated */], $ac_prefix_conf_OUT)
changequote({, })dnl
echo '#ifndef '$ac_prefix_conf_DEF >$ac_prefix_conf_OUT
echo '#define '$ac_prefix_conf_DEF' 1' >>$ac_prefix_conf_OUT
echo ' ' >>$ac_prefix_conf_OUT
echo /'*' $ac_prefix_conf_OUT. Generated automatically at end of configure. '*'/ >>$ac_prefix_conf_OUT
echo 's/#undef *\([A-Z_]\)/#undef '$ac_prefix_conf_UPP'_\1/' >conftest.sed
echo 's/#undef *\([a-z]\)/#undef '$ac_prefix_conf_LOW'_\1/' >>conftest.sed
echo 's/#define *\([A-Z_][A-Za-z0-9_]*\)\(.*\)/#ifndef '$ac_prefix_conf_UPP"_\\1 \\" >>conftest.sed
echo '#define '$ac_prefix_conf_UPP"_\\1 \\2 \\" >>conftest.sed
echo '#endif/' >>conftest.sed
echo 's/#define *\([a-z][A-Za-z0-9_]*\)\(.*\)/#ifndef '$ac_prefix_conf_LOW"_\\1 \\" >>conftest.sed
echo '#define '$ac_prefix_conf_LOW"_\\1 \\2 \\" >>conftest.sed
echo '#endif/' >>conftest.sed
sed -f conftest.sed $ac_prefix_conf_INP >>$ac_prefix_conf_OUT
echo ' ' >>$ac_prefix_conf_OUT
echo '/*' $ac_prefix_conf_DEF '*/' >>$ac_prefix_conf_OUT
echo '#endif' >>$ac_prefix_conf_OUT
changequote([, ])dnl
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])
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