AC_CREATE_PREFIX_CONFIG_H [(OUTPUT-HEADER [,PREFIX [,ORIG-HEADER]])]
,
Guido U. Draheim <guidod@gmx.de>
GPLWithACException
This program is free software; you can
redistribute it and/or modify it under the terms of the GNU General Public License
as published by the Free Software Foundation. As a special exception, the respective
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GNU General Public License when using or distributing such scripts
guidod's Obsoleted (obsoleted)
lowercase-prefix if the config-define was starting with a
lowercase-char, e.g.
#define const or #define restrict or #define off_t
(and this one can live in another directory, e.g. testpkg/config.h
therefore I decided to move the output-header to be the first arg)
takes the usual config.h generated header file; looks for each of
the generated "#define SOMEDEF" lines, and prefixes the defined
name (ie. makes it "#define PREFIX_SOMEDEF". The result is written
to the output config.header file. The PREFIX is converted to
uppercase for the conversions.
- default OUTPUT-HEADER = $PACKAGE-config.h
- default PREFIX = $PACKAGE
- default ORIG-HEADER, derived from OUTPUT-HEADER
if OUTPUT-HEADER has a "/", use the basename
if OUTPUT-HEADER has a "-", use the section after it.
otherwise, just config.h
In most cases, the configure.in will contain a line saying
AC_CONFIG_HEADER(config.h)
somewhere *before* AC_OUTPUT and a simple line saying
AC_PREFIX_CONFIG_HEADER
somewhere *after* AC_OUTPUT.
example:
AC_INIT(config.h.in) # config.h.in as created by "autoheader"
AM_INIT_AUTOMAKE(testpkg, 0.1.1) # "#undef VERSION" and "PACKAGE"
AM_CONFIG_HEADER(config.h) # in config.h.in
AC_MEMORY_H # "#undef NEED_MEMORY_H"
AC_C_CONST_H # "#undef const"
AC_OUTPUT(Makefile) # creates the "config.h" now
AC_CREATE_PREFIX_CONFIG_H # creates "testpkg-config.h"
and the resulting "testpkg-config.h" contains lines like
#ifndef TESTPKG_VERSION
#define TESTPKG_VERSION "0.1.1"
#endif
#ifndef TESTPKG_NEED_MEMORY_H
#define TESTPKG_NEED_MEMORY_H 1
#endif
#ifndef _testpkg_const
#define _testpkg_const const
#endif
and this "testpkg-config.h" can be installed along with other
header-files, which is most convenient when creating a shared
library (that has some headers) where some functionality is
dependent on the OS-features detected at compile-time. No
need to invent some "testpkg-confdefs.h.in" manually. :-)
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
AC_ECHO_MKFILE([/* 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])