| 1 | # =========================================================================== |
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| 2 | # http://www.gnu.org/software/autoconf-archive/ax_prefix_config_h.html |
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| 3 | # =========================================================================== |
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| 4 | # |
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| 5 | # SYNOPSIS |
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| 6 | # |
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| 7 | # AX_PREFIX_CONFIG_H [(OUTPUT-HEADER [,PREFIX [,ORIG-HEADER]])] |
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| 8 | # |
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| 9 | # DESCRIPTION |
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| 10 | # |
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| 11 | # This is a new variant from ac_prefix_config_ this one will use a |
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| 12 | # lowercase-prefix if the config-define was starting with a |
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| 13 | # lowercase-char, e.g. "#define const", "#define restrict", or "#define |
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| 14 | # off_t", (and this one can live in another directory, e.g. |
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| 15 | # testpkg/config.h therefore I decided to move the output-header to be the |
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| 16 | # first arg) |
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| 17 | # |
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| 18 | # takes the usual config.h generated header file; looks for each of the |
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| 19 | # generated "#define SOMEDEF" lines, and prefixes the defined name (ie. |
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| 20 | # makes it "#define PREFIX_SOMEDEF". The result is written to the output |
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| 21 | # config.header file. The PREFIX is converted to uppercase for the |
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| 22 | # conversions. |
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| 23 | # |
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| 24 | # Defaults: |
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| 25 | # |
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| 26 | # OUTPUT-HEADER = $PACKAGE-config.h |
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| 27 | # PREFIX = $PACKAGE |
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| 28 | # ORIG-HEADER, from AM_CONFIG_HEADER(config.h) |
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| 29 | # |
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| 30 | # Your configure.ac script should contain both macros in this order, and |
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| 31 | # unlike the earlier variations of this prefix-macro it is okay to place |
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| 32 | # the AX_PREFIX_CONFIG_H call before the AC_OUTPUT invokation. |
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| 33 | # |
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| 34 | # Example: |
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| 35 | # |
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| 36 | # AC_INIT(config.h.in) # config.h.in as created by "autoheader" |
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| 37 | # AM_INIT_AUTOMAKE(testpkg, 0.1.1) # makes #undef VERSION and PACKAGE |
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| 38 | # AM_CONFIG_HEADER(config.h) # prep config.h from config.h.in |
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| 39 | # AX_PREFIX_CONFIG_H(mylib/_config.h) # prep mylib/_config.h from it.. |
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| 40 | # AC_MEMORY_H # makes "#undef NEED_MEMORY_H" |
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| 41 | # AC_C_CONST_H # makes "#undef const" |
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| 42 | # AC_OUTPUT(Makefile) # creates the "config.h" now |
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| 43 | # # and also mylib/_config.h |
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| 44 | # |
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| 45 | # if the argument to AX_PREFIX_CONFIG_H would have been omitted then the |
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| 46 | # default outputfile would have been called simply "testpkg-config.h", but |
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| 47 | # even under the name "mylib/_config.h" it contains prefix-defines like |
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| 48 | # |
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| 49 | # #ifndef TESTPKG_VERSION |
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| 50 | # #define TESTPKG_VERSION "0.1.1" |
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| 51 | # #endif |
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| 52 | # #ifndef TESTPKG_NEED_MEMORY_H |
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| 53 | # #define TESTPKG_NEED_MEMORY_H 1 |
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| 54 | # #endif |
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| 55 | # #ifndef _testpkg_const |
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| 56 | # #define _testpkg_const _const |
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| 57 | # #endif |
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| 58 | # |
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| 59 | # and this "mylib/_config.h" can be installed along with other |
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| 60 | # header-files, which is most convenient when creating a shared library |
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| 61 | # (that has some headers) where some functionality is dependent on the |
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| 62 | # OS-features detected at compile-time. No need to invent some |
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| 63 | # "mylib-confdefs.h.in" manually. :-) |
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| 64 | # |
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| 65 | # Note that some AC_DEFINEs that end up in the config.h file are actually |
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| 66 | # self-referential - e.g. AC_C_INLINE, AC_C_CONST, and the AC_TYPE_OFF_T |
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| 67 | # say that they "will define inline|const|off_t if the system does not do |
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| 68 | # it by itself". You might want to clean up about these - consider an |
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| 69 | # extra mylib/conf.h that reads something like: |
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| 70 | # |
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| 71 | # #include <mylib/_config.h> |
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| 72 | # #ifndef _testpkg_const |
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| 73 | # #define _testpkg_const const |
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| 74 | # #endif |
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| 75 | # |
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| 76 | # and then start using _testpkg_const in the header files. That is also a |
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| 77 | # good thing to differentiate whether some library-user has starting to |
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| 78 | # take up with a different compiler, so perhaps it could read something |
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| 79 | # like this: |
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| 80 | # |
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| 81 | # #ifdef _MSC_VER |
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| 82 | # #include <mylib/_msvc.h> |
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| 83 | # #else |
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| 84 | # #include <mylib/_config.h> |
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| 85 | # #endif |
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| 86 | # #ifndef _testpkg_const |
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| 87 | # #define _testpkg_const const |
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| 88 | # #endif |
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| 89 | # |
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| 90 | # LICENSE |
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| 91 | # |
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| 92 | # Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de> |
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| 93 | # Copyright (c) 2008 Marten Svantesson |
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| 94 | # Copyright (c) 2008 Gerald Point <Gerald.Point@labri.fr> |
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| 95 | # |
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| 96 | # This program is free software; you can redistribute it and/or modify it |
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| 97 | # under the terms of the GNU General Public License as published by the |
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| 98 | # Free Software Foundation; either version 3 of the License, or (at your |
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| 99 | # option) any later version. |
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| 100 | # |
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| 101 | # This program is distributed in the hope that it will be useful, but |
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| 102 | # WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 103 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General |
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| 104 | # Public License for more details. |
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| 105 | # |
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| 106 | # You should have received a copy of the GNU General Public License along |
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| 107 | # with this program. If not, see <http://www.gnu.org/licenses/>. |
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| 108 | # |
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| 109 | # As a special exception, the respective Autoconf Macro's copyright owner |
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| 110 | # gives unlimited permission to copy, distribute and modify the configure |
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| 111 | # scripts that are the output of Autoconf when processing the Macro. You |
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| 112 | # need not follow the terms of the GNU General Public License when using |
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| 113 | # or distributing such scripts, even though portions of the text of the |
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| 114 | # Macro appear in them. The GNU General Public License (GPL) does govern |
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| 115 | # all other use of the material that constitutes the Autoconf Macro. |
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| 116 | # |
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| 117 | # This special exception to the GPL applies to versions of the Autoconf |
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| 118 | # Macro released by the Autoconf Archive. When you make and distribute a |
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| 119 | # modified version of the Autoconf Macro, you may extend this special |
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| 120 | # exception to the GPL to apply to your modified version as well. |
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| 121 | |
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| 122 | #serial 11 |
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| 123 | |
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| 124 | AC_DEFUN([AX_PREFIX_CONFIG_H],[dnl |
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| 125 | AC_PREREQ([2.62]) |
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| 126 | AC_BEFORE([AC_CONFIG_HEADERS],[$0])dnl |
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| 127 | AC_CONFIG_COMMANDS([ifelse($1,,$PACKAGE-config.h,$1)],[dnl |
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| 128 | AS_VAR_PUSHDEF([_OUT],[ac_prefix_conf_OUT])dnl |
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| 129 | AS_VAR_PUSHDEF([_DEF],[ac_prefix_conf_DEF])dnl |
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| 130 | AS_VAR_PUSHDEF([_PKG],[ac_prefix_conf_PKG])dnl |
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| 131 | AS_VAR_PUSHDEF([_LOW],[ac_prefix_conf_LOW])dnl |
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| 132 | AS_VAR_PUSHDEF([_UPP],[ac_prefix_conf_UPP])dnl |
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| 133 | AS_VAR_PUSHDEF([_INP],[ac_prefix_conf_INP])dnl |
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| 134 | m4_pushdef([_script],[conftest.prefix])dnl |
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| 135 | m4_pushdef([_symbol],[m4_cr_Letters[]m4_cr_digits[]_])dnl |
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| 136 | _OUT=`echo ifelse($1, , $PACKAGE-config.h, $1)` |
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| 137 | _DEF=`echo _$_OUT | sed -e "y:m4_cr_letters:m4_cr_LETTERS[]:" -e "s/@<:@^m4_cr_Letters@:>@/_/g"` |
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| 138 | _PKG=`echo ifelse($2, , $PACKAGE, $2)` |
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| 139 | _LOW=`echo _$_PKG | sed -e "y:m4_cr_LETTERS-:m4_cr_letters[]_:"` |
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| 140 | _UPP=`echo $_PKG | sed -e "y:m4_cr_letters-:m4_cr_LETTERS[]_:" -e "/^@<:@m4_cr_digits@:>@/s/^/_/"` |
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| 141 | _INP=`echo "ifelse($3,,,$3)" | sed -e 's/ *//'` |
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| 142 | if test ".$_INP" = "."; then |
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| 143 | for ac_file in : $CONFIG_HEADERS; do test "_$ac_file" = _: && continue |
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| 144 | case "$ac_file" in |
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| 145 | *.h) _INP=$ac_file ;; |
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| 146 | *) |
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| 147 | esac |
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| 148 | test ".$_INP" != "." && break |
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| 149 | done |
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| 150 | fi |
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| 151 | if test ".$_INP" = "."; then |
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| 152 | case "$_OUT" in |
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| 153 | */*) _INP=`basename "$_OUT"` |
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| 154 | ;; |
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| 155 | *-*) _INP=`echo "$_OUT" | sed -e "s/@<:@_symbol@:>@*-//"` |
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| 156 | ;; |
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| 157 | *) _INP=config.h |
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| 158 | ;; |
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| 159 | esac |
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| 160 | fi |
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| 161 | if test -z "$_PKG" ; then |
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| 162 | AC_MSG_ERROR([no prefix for _PREFIX_PKG_CONFIG_H]) |
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| 163 | else |
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| 164 | if test ! -f "$_INP" ; then if test -f "$srcdir/$_INP" ; then |
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| 165 | _INP="$srcdir/$_INP" |
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| 166 | fi fi |
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| 167 | AC_MSG_NOTICE(creating $_OUT - prefix $_UPP for $_INP defines) |
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| 168 | if test -f $_INP ; then |
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| 169 | AS_ECHO(["s/^@%:@undef *\\(@<:@m4_cr_LETTERS[]_@:>@\\)/@%:@undef $_UPP""_\\1/"]) > _script |
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| 170 | AS_ECHO(["s/^@%:@undef *\\(@<:@m4_cr_letters@:>@\\)/@%:@undef $_LOW""_\\1/"]) >> _script |
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| 171 | AS_ECHO(["s/^@%:@def[]ine *\\(@<:@m4_cr_LETTERS[]_@:>@@<:@_symbol@:>@*\\)\\(.*\\)/@%:@ifndef $_UPP""_\\1\\"]) >> _script |
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| 172 | AS_ECHO(["@%:@def[]ine $_UPP""_\\1\\2\\"]) >> _script |
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| 173 | AS_ECHO(["@%:@endif/"]) >> _script |
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| 174 | AS_ECHO(["s/^@%:@def[]ine *\\(@<:@m4_cr_letters@:>@@<:@_symbol@:>@*\\)\\(.*\\)/@%:@ifndef $_LOW""_\\1\\"]) >> _script |
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| 175 | AS_ECHO(["@%:@define $_LOW""_\\1\\2\\"]) >> _script |
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| 176 | AS_ECHO(["@%:@endif/"]) >> _script |
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| 177 | # now executing _script on _DEF input to create _OUT output file |
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| 178 | echo "@%:@ifndef $_DEF" >$tmp/pconfig.h |
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| 179 | echo "@%:@def[]ine $_DEF 1" >>$tmp/pconfig.h |
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| 180 | echo ' ' >>$tmp/pconfig.h |
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| 181 | echo /'*' $_OUT. Generated automatically at end of configure. '*'/ >>$tmp/pconfig.h |
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| 182 | |
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| 183 | sed -f _script $_INP >>$tmp/pconfig.h |
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| 184 | echo ' ' >>$tmp/pconfig.h |
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| 185 | echo '/* once:' $_DEF '*/' >>$tmp/pconfig.h |
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| 186 | echo "@%:@endif" >>$tmp/pconfig.h |
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| 187 | if cmp -s $_OUT $tmp/pconfig.h 2>/dev/null; then |
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| 188 | AC_MSG_NOTICE([$_OUT is unchanged]) |
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| 189 | else |
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| 190 | ac_dir=`AS_DIRNAME(["$_OUT"])` |
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| 191 | AS_MKDIR_P(["$ac_dir"]) |
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| 192 | rm -f "$_OUT" |
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| 193 | mv $tmp/pconfig.h "$_OUT" |
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| 194 | fi |
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| 195 | cp _script _configs.sed |
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| 196 | else |
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| 197 | AC_MSG_ERROR([input file $_INP does not exist - skip generating $_OUT]) |
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| 198 | fi |
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| 199 | rm -f conftest.* |
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| 200 | fi |
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| 201 | m4_popdef([_symbol])dnl |
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| 202 | m4_popdef([_script])dnl |
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| 203 | AS_VAR_POPDEF([_INP])dnl |
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| 204 | AS_VAR_POPDEF([_UPP])dnl |
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| 205 | AS_VAR_POPDEF([_LOW])dnl |
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| 206 | AS_VAR_POPDEF([_PKG])dnl |
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| 207 | AS_VAR_POPDEF([_DEF])dnl |
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| 208 | AS_VAR_POPDEF([_OUT])dnl |
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| 209 | ],[PACKAGE="$PACKAGE"])]) |
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