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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN"
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<title>
Autoconf Macro: ac_create_prefix_config_h
</title>
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"http://autoconf-archive.cryp.to/ac_create_prefix_config_h.m4">Download
M4 Source</a>
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<hr>
<h1>
ac_create_prefix_config_h
</h1>
<h2>
Obsolete Macro
</h2>
<p class="indent">
Use AX_PREFIX_CONFIG_H.
</p>
<h2>
Synopsis
</h2>
<p class="indent" style="white-space:nowrap;">
<code>AC_CREATE_PREFIX_CONFIG_H [(OUTPUT-HEADER [,PREFIX
[,ORIG-HEADER]])]</code>
</p>
<h2>
Description
</h2>
<div class="indent">
<p>
* this is a new variant from ac_prefix_config_ this one will use a
lowercase-prefix if the config-define was starting with a lowercase-char,
e.g.
</p>
<pre>
#define const or #define restrict or #define off_t
</pre>
<p>
(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)
</p>
<p>
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.
</p>
<p>
- default OUTPUT-HEADER = $PACKAGE-config.h - default PREFIX = $PACKAGE -
default ORIG-HEADER, derived from OUTPUT-HEADER
</p>
<pre>
if OUTPUT-HEADER has a "/", use the basename
if OUTPUT-HEADER has a "-", use the section after it.
otherwise, just config.h
</pre>
<p>
In most cases, the configure.in will contain a line saying
</p>
<pre>
AC_CONFIG_HEADER(config.h)
</pre>
<p>
somewhere *before* AC_OUTPUT and a simple line saying
</p>
<pre>
AC_PREFIX_CONFIG_HEADER
</pre>
<p>
somewhere *after* AC_OUTPUT.
</p>
<p>
example:
</p>
<pre>
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. :-)
</pre>
</div>
<h2>
Author
</h2>
<p class="indent">
Guido Draheim <guidod@gmx.de>
</p>
<h2>
Last Modified
</h2>
<p class="indent">
2005-01-25
</p>
<h2>
M4 Source Code
</h2>
<div class="indent">
<pre class="m4source">
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])
</pre>
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