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Diffstat (limited to 'm4/ax_prefix_config_h.m4')
| -rw-r--r-- | m4/ax_prefix_config_h.m4 | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/m4/ax_prefix_config_h.m4 b/m4/ax_prefix_config_h.m4 new file mode 100644 index 0000000..c17563f --- /dev/null +++ b/m4/ax_prefix_config_h.m4 @@ -0,0 +1,203 @@ +# =========================================================================== +# http://www.gnu.org/software/autoconf-archive/ax_prefix_config_h.html +# =========================================================================== +# +# SYNOPSIS +# +# AX_PREFIX_CONFIG_H [(OUTPUT-HEADER [,PREFIX [,ORIG-HEADER]])] +# +# DESCRIPTION +# +# Generate an installable config.h. +# +# A package should not normally install its config.h as a system header, +# but if it must, this macro can be used to avoid namespace pollution by +# making a copy of config.h with a prefix added to all the macro names. +# +# Each "#define SOMEDEF" line of the configuration header has the given +# prefix added, in the same case as the first character of the macro name. +# +# Defaults: +# +# OUTPUT-HEADER = $PACKAGE-config.h +# PREFIX = $PACKAGE +# ORIG-HEADER, from AM_CONFIG_HEADER(config.h) +# +# Your configure.ac script should contain both macros in this order. +# +# Example: +# +# AC_INIT(config.h.in) # config.h.in as created by "autoheader" +# AM_INIT_AUTOMAKE(testpkg, 0.1.1) # makes #undef VERSION and PACKAGE +# AM_CONFIG_HEADER(config.h) # prep config.h from config.h.in +# AX_PREFIX_CONFIG_H(mylib/_config.h) # prep mylib/_config.h from it.. +# AC_MEMORY_H # makes "#undef NEED_MEMORY_H" +# AC_C_CONST_H # makes "#undef const" +# AC_OUTPUT(Makefile) # creates the "config.h" now +# # and also mylib/_config.h +# +# If the argument to AX_PREFIX_CONFIG_H would have been omitted then the +# default output file would have been called simply "testpkg-config.h", +# but even under the name "mylib/_config.h" it contains prefix-defines +# 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 "mylib/_config.h" can be installed along with other header +# files, which is most convenient when creating a shared library (that has +# some headers) whose functionality depends on features detected at +# compile-time. No need to invent some "mylib-confdefs.h.in" manually. +# +# Note that some AC_DEFINEs that end up in the config.h file are actually +# self-referential - e.g. AC_C_INLINE, AC_C_CONST, and the AC_TYPE_OFF_T +# say that they "will define inline|const|off_t if the system does not do +# it by itself". You might want to clean up about these - consider an +# extra mylib/conf.h that reads something like: +# +# #include <mylib/_config.h> +# #ifndef _testpkg_const +# #define _testpkg_const const +# #endif +# +# and then start using _testpkg_const in the header files. That is also a +# good thing to differentiate whether some library-user has starting to +# take up with a different compiler, so perhaps it could read something +# like this: +# +# #ifdef _MSC_VER +# #include <mylib/_msvc.h> +# #else +# #include <mylib/_config.h> +# #endif +# #ifndef _testpkg_const +# #define _testpkg_const const +# #endif +# +# LICENSE +# +# Copyright (c) 2014 Reuben Thomas <rrt@sc3d.org> +# Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de> +# Copyright (c) 2008 Marten Svantesson +# Copyright (c) 2008 Gerald Point <Gerald.Point@labri.fr> +# +# 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; either version 3 of the License, or (at your +# option) any later version. +# +# This program is distributed in the hope that it will be useful, but +# WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General +# Public License for more details. +# +# You should have received a copy of the GNU General Public License along +# with this program. If not, see <http://www.gnu.org/licenses/>. +# +# As a special exception, the respective Autoconf Macro's copyright owner +# gives unlimited permission to copy, distribute and modify the configure +# scripts that are the output of Autoconf when processing the Macro. You +# need not follow the terms of the GNU General Public License when using +# or distributing such scripts, even though portions of the text of the +# Macro appear in them. The GNU General Public License (GPL) does govern +# all other use of the material that constitutes the Autoconf Macro. +# +# This special exception to the GPL applies to versions of the Autoconf +# Macro released by the Autoconf Archive. When you make and distribute a +# modified version of the Autoconf Macro, you may extend this special +# exception to the GPL to apply to your modified version as well. + +#serial 15 + +AC_DEFUN([AX_PREFIX_CONFIG_H],[dnl +AC_PREREQ([2.62]) +AC_BEFORE([AC_CONFIG_HEADERS],[$0])dnl +AC_CONFIG_COMMANDS(m4_default([$1], [$PACKAGE-config.h]),[dnl +AS_VAR_PUSHDEF([_OUT],[ac_prefix_conf_OUT])dnl +AS_VAR_PUSHDEF([_DEF],[ac_prefix_conf_DEF])dnl +AS_VAR_PUSHDEF([_PKG],[ac_prefix_conf_PKG])dnl +AS_VAR_PUSHDEF([_LOW],[ac_prefix_conf_LOW])dnl +AS_VAR_PUSHDEF([_UPP],[ac_prefix_conf_UPP])dnl +AS_VAR_PUSHDEF([_INP],[ac_prefix_conf_INP])dnl +m4_pushdef([_script],[conftest.prefix])dnl +m4_pushdef([_symbol],[m4_cr_Letters[]m4_cr_digits[]_])dnl +_OUT=`echo m4_default([$1], [$PACKAGE-config.h])` +_DEF=`echo _$_OUT | sed -e "y:m4_cr_letters:m4_cr_LETTERS[]:" -e "s/@<:@^m4_cr_Letters@:>@/_/g"` +_PKG=`echo m4_default([$2], [$PACKAGE])` +_LOW=`echo _$_PKG | sed -e "y:m4_cr_LETTERS-:m4_cr_letters[]_:"` +_UPP=`echo $_PKG | sed -e "y:m4_cr_letters-:m4_cr_LETTERS[]_:" -e "/^@<:@m4_cr_digits@:>@/s/^/_/"` +_INP=`echo "$3" | sed -e 's/ *//'` +if test ".$_INP" = "."; then + for ac_file in : $CONFIG_HEADERS; do test "_$ac_file" = _: && continue + case "$ac_file" in + *.h) _INP=$ac_file ;; + *) + esac + test ".$_INP" != "." && break + done +fi +if test ".$_INP" = "."; then + case "$_OUT" in + */*) _INP=`basename "$_OUT"` + ;; + *-*) _INP=`echo "$_OUT" | sed -e "s/@<:@_symbol@:>@*-//"` + ;; + *) _INP=config.h + ;; + esac +fi +if test -z "$_PKG" ; then + AC_MSG_ERROR([no prefix for _PREFIX_PKG_CONFIG_H]) +else + if test ! -f "$_INP" ; then if test -f "$srcdir/$_INP" ; then + _INP="$srcdir/$_INP" + fi fi + AC_MSG_NOTICE(creating $_OUT - prefix $_UPP for $_INP defines) + if test -f $_INP ; then + AS_ECHO(["s/^@%:@undef *\\(@<:@m4_cr_LETTERS[]_@:>@\\)/@%:@undef $_UPP""_\\1/"]) > _script + AS_ECHO(["s/^@%:@undef *\\(@<:@m4_cr_letters@:>@\\)/@%:@undef $_LOW""_\\1/"]) >> _script + AS_ECHO(["s/^@%:@def[]ine *\\(@<:@m4_cr_LETTERS[]_@:>@@<:@_symbol@:>@*\\)\\(.*\\)/@%:@ifndef $_UPP""_\\1\\"]) >> _script + AS_ECHO(["@%:@def[]ine $_UPP""_\\1\\2\\"]) >> _script + AS_ECHO(["@%:@endif/"]) >> _script + AS_ECHO(["s/^@%:@def[]ine *\\(@<:@m4_cr_letters@:>@@<:@_symbol@:>@*\\)\\(.*\\)/@%:@ifndef $_LOW""_\\1\\"]) >> _script + AS_ECHO(["@%:@define $_LOW""_\\1\\2\\"]) >> _script + AS_ECHO(["@%:@endif/"]) >> _script + # now executing _script on _DEF input to create _OUT output file + echo "@%:@ifndef $_DEF" >$tmp/pconfig.h + echo "@%:@def[]ine $_DEF 1" >>$tmp/pconfig.h + echo ' ' >>$tmp/pconfig.h + echo /'*' $_OUT. Generated automatically at end of configure. '*'/ >>$tmp/pconfig.h + + sed -f _script $_INP >>$tmp/pconfig.h + echo ' ' >>$tmp/pconfig.h + echo '/* once:' $_DEF '*/' >>$tmp/pconfig.h + echo "@%:@endif" >>$tmp/pconfig.h + if cmp -s $_OUT $tmp/pconfig.h 2>/dev/null; then + AC_MSG_NOTICE([$_OUT is unchanged]) + else + ac_dir=`AS_DIRNAME(["$_OUT"])` + AS_MKDIR_P(["$ac_dir"]) + rm -f "$_OUT" + mv $tmp/pconfig.h "$_OUT" + fi + else + AC_MSG_ERROR([input file $_INP does not exist - skip generating $_OUT]) + fi + rm -f conftest.* +fi +m4_popdef([_symbol])dnl +m4_popdef([_script])dnl +AS_VAR_POPDEF([_INP])dnl +AS_VAR_POPDEF([_UPP])dnl +AS_VAR_POPDEF([_LOW])dnl +AS_VAR_POPDEF([_PKG])dnl +AS_VAR_POPDEF([_DEF])dnl +AS_VAR_POPDEF([_OUT])dnl +],[PACKAGE="$PACKAGE"])]) |
