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AC_CREATE_PREFIX_CONFIG_H_ [(OUTPUT-HEADER [,PREFIX [,ORIG-HEADER]])]
1.2 (2002/04/22) guidod @ ac-archive-0.5.37
Guido Draheim <guidod@gmx.de>
this is a new variant from ac_prefix_config_ / ac_create_prefix_config_h
this one will treat Defines special if starting with a lowercase char
as it is common with #define const or #define off_t
they'll get defined always (!!) and they start off with the non-modified
PREFIX (which is by-default the PACKAGE-name being usually all-lowercase)
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 '/^[^A-Za-z_]/s/^/_/'` ac_prefix_conf_UPP=`echo $ac_prefix_conf_PKG | sed -e '/^[^A-Za-z_]/s/^/_/' -e 'y:abcdefghijklmnopqrstuvwxyz-:ABCDEFGHIJKLMNOPQRSTUVWXYZ_:'` 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 '# generated for temporary usage' >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 echo 's/^.[*] *#undef *\([a-z][a-z_]*[a-z]\) *[*]. *$/#ifndef '$ac_prefix_conf_LOW'_\1 \' >>conftest.sed echo '#define '$ac_prefix_conf_LOW'_\1 \1 \' >>conftest.sed echo '#endif/' >>conftest.sed echo 's/#undef *\([a-z]\)/#undef '$ac_prefix_conf_LOW'_\1/' >>conftest.sed echo 's/#undef *\([A-Z_]\)/#undef '$ac_prefix_conf_UPP'_\1/' >>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])