m4/zlib.m4

   1 #                                                       -*- Autoconf -*-
   2 # This file is part of the aMule Project.
   3 #
   4 # Copyright (c) 2003-2008 aMule Team ( admin@amule.org / http://www.amule.org )
   5 #
   6 # Any parts of this program derived from the xMule, lMule or eMule project,
   7 # or contributed by third-party developers are copyrighted by their
   8 # respective authors.
   9 #
  10 # This program is free software; you can redistribute it and/or modify
  11 # it under the terms of the GNU General Public License as published by
  12 # the Free Software Foundation; either version 2 of the License, or
  13 # (at your option) any later version.
  14 #
  15 # This program is distributed in the hope that it will be useful,
  16 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 # GNU General Public License for more details.
  19 #
  20 # You should have received a copy of the GNU General Public License
  21 # along with this program; if not, write to the Free Software
  22 # Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA
  23 #
  24
  25 dnl ----------------------------------------------------
  26 dnl MULE_CHECK_ZLIB([MIN_ZLIB_VERSION = 1.1.4], [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
  27 dnl
  28 dnl check if zlib is on the system and is at least MIN_ZLIB_VERSION
  29 dnl
  30 dnl Add support for --with-zlib command-line parameter.
  31 dnl PREFIX may be a directory prefix where zlib is installed, e.g. /usr/local
  32 dnl or may be one of the following special keywords:
  33 dnl    sys - use system zlib
  34 dnl
  35 dnl Will set the output variables:
  36 dnl      ZLIB_CPPFLAGS
  37 dnl      ZLIB_LDFLAGS
  38 dnl      ZLIB_LIBS
  39 dnl ----------------------------------------------------
  40 AC_DEFUN([MULE_CHECK_ZLIB],
  41 [dnl
  42 m4_define([MIN_ZLIB_VERSION], [m4_ifval([$1], [$1], [1.1.4])])dnl
  43 m4_define([zver_max], [m4_bregexp(MIN_ZLIB_VERSION, [\([0-9]+\)\.\([0-9]+\)\.\([0-9]+\)], [\1])])dnl
  44 m4_define([zver_mid], [m4_bregexp(MIN_ZLIB_VERSION, [\([0-9]+\)\.\([0-9]+\)\.\([0-9]+\)], [\2])])dnl
  45 m4_define([zver_min], [m4_bregexp(MIN_ZLIB_VERSION, [\([0-9]+\)\.\([0-9]+\)\.\([0-9]+\)], [\3])])dnl
  46
  47         AC_ARG_WITH([zlib], AS_HELP_STRING([--with-zlib=PREFIX], [use zlib in PREFIX]))
  48
  49         case "${with_zlib:-yes}" in
  50         no)
  51                 $3
  52                 ;;
  53         yes | sys)
  54                 ;;
  55         *)
  56                 zlib_prefix="$with_zlib"
  57         esac
  58
  59         MULE_BACKUP([CPPFLAGS])
  60         MULE_BACKUP([LDFLAGS])
  61         MULE_BACKUP([LIBS])
  62         AS_IF([test -n "$zlib_prefix"],
  63         [
  64                 ZLIB_CPPFLAGS="-I$zlib_prefix/include"
  65                 ZLIB_LDFLAGS="-L$zlib_prefix/lib"
  66                 MULE_APPEND([CPPFLAGS], [$ZLIB_CPPFLAGS])
  67                 MULE_APPEND([LDFLAGS], [$ZLIB_LDFLAGS])
  68         ], [
  69                 ZLIB_CPPFLAGS=
  70                 ZLIB_LDFLAGS=
  71         ])
  72         ZLIB_LIBS="-lz"
  73         MULE_PREPEND([LIBS], [$ZLIB_LIBS])
  74
  75         AC_MSG_CHECKING([for zlib >= $1])
  76         AC_RUN_IFELSE([
  77                 AC_LANG_PROGRAM([[
  78                         #include <zlib.h>
  79                         #include <stdio.h>
  80                 ]], [dnl Do not use double-quoting here!
  81                         char *zver = zlibVersion();
  82                         FILE *f=fopen("conftestval", "w");
  83                         if (!f) return 1;
  84                         fprintf(f, "%s",
  85                                 zver[[0]] > 'zver_max' ||
  86                                 (zver[[0]] == 'zver_max' &&
  87                                 (zver[[2]] > 'zver_mid' ||
  88                                 (zver[[2]] == 'zver_mid' &&
  89                                 zver[[4]] >= 'zver_min'))) ? "yes" : "no");
  90                         fclose(f);
  91                         f=fopen("conftestver", "w");
  92                         if (f) {
  93                                 fprintf(f, "%s", ZLIB_VERSION);
  94                                 fclose(f);
  95                         }
  96                 ])
  97         ], [
  98                 AS_IF([test -f conftestval], [result=`cat conftestval`], [result=no])
  99                 AS_IF([test ${result:-no} = yes],
 100                 [
 101                         AS_IF([test -f conftestver],
 102                         [
 103                                 ZLIB_VERSION=`cat conftestver`
 104                                 z_version=" (version $ZLIB_VERSION)"
 105                         ], [z_version=])
 106                 ])
 107                 AC_MSG_RESULT([$result$z_version])
 108         ], [
 109                 result=no
 110                 AC_MSG_RESULT([$result])
 111         ], [
 112                 result=no
 113                 z_version=
 114                 AC_LINK_IFELSE([
 115                         AC_LANG_PROGRAM([[
 116                                 #include <zlib.h>
 117                                 #include <stdio.h>
 118                         ]], [[
 119                                 printf("\nZLIB_VERSION_START" ZLIB_VERSION "ZLIB_VERSION_END\n\n");
 120                                 zlibVersion();
 121                         ]])
 122                 ], [
 123                         ZLIB_VERSION=`grep -a '^ZLIB_VERSION_START.*ZLIB_VERSION_END$' conftest$ac_exeext | sed 's/^ZLIB_VERSION_START\(.*\)ZLIB_VERSION_END$/\1/'`
 124                         cross_zver_max="`echo $ZLIB_VERSION | cut -d. -f1`"
 125                         cross_zver_mid="`echo $ZLIB_VERSION | cut -d. -f2`"
 126                         cross_zver_min="`echo $ZLIB_VERSION | cut -d. -f3`"
 127                         MULE_IF([test "$cross_zver_max" -gt "zver_max"], [result=yes],
 128                                 [test "$cross_zver_max" -eq "zver_max"], [
 129                                         MULE_IF([test "$cross_zver_mid" -gt "zver_mid"], [result=yes],
 130                                                 [test "$cross_zver_mid" -eq "zver_mid"],
 131                                                         [MULE_IF([test "$cross_zver_min" -ge "zver_min"], [result=yes])])
 132                                 ])
 133                         AS_IF([test ${result:-no} = yes], [z_version=" (version $ZLIB_VERSION)"])
 134                 ])
 135                 AC_MSG_RESULT([$result$z_version])
 136         ])
 137
 138         MULE_RESTORE([CPPFLAGS])
 139         MULE_RESTORE([LDFLAGS])
 140         MULE_RESTORE([LIBS])
 141
 142         AS_IF([test ${result:-no} = no], [
 143                 ZLIB_CPPFLAGS=
 144                 ZLIB_LDFLAGS=
 145                 ZLIB_LIBS=
 146                 $3
 147         ], [$2])
 148
 149 AC_SUBST([ZLIB_CPPFLAGS])dnl
 150 AC_SUBST([ZLIB_LDFLAGS])dnl
 151 AC_SUBST([ZLIB_LIBS])dnl
 152 m4_undefine([zver_max])dnl
 153 m4_undefine([zver_mid])dnl
 154 m4_undefine([zver_min])dnl
 155 m4_undefine([MIN_ZLIB_VERSION])dnl
 156 ])