sdl.m4
author Sam Lantinga <slouken@libsdl.org>
Sat, 12 Dec 2009 01:04:57 +0000
changeset 3548 79af7b478fae
parent 3379 3dd59e993979
child 4441 e3033ab628a1
permissions -rw-r--r--
Removed the obsolete testcdrom target
     1 # Configure paths for SDL
     2 # Sam Lantinga 9/21/99
     3 # stolen from Manish Singh
     4 # stolen back from Frank Belew
     5 # stolen from Manish Singh
     6 # Shamelessly stolen from Owen Taylor
     7 
     8 dnl AM_PATH_SDL([MINIMUM-VERSION, [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]])
     9 dnl Test for SDL, and define SDL_CFLAGS and SDL_LIBS
    10 dnl
    11 AC_DEFUN([AM_PATH_SDL],
    12 [dnl 
    13 dnl Get the cflags and libraries from the sdl-config script
    14 dnl
    15 AC_ARG_WITH(sdl-prefix,[  --with-sdl-prefix=PFX   Prefix where SDL is installed (optional)],
    16             sdl_prefix="$withval", sdl_prefix="")
    17 AC_ARG_WITH(sdl-exec-prefix,[  --with-sdl-exec-prefix=PFX Exec prefix where SDL is installed (optional)],
    18             sdl_exec_prefix="$withval", sdl_exec_prefix="")
    19 AC_ARG_ENABLE(sdltest, [  --disable-sdltest       Do not try to compile and run a test SDL program],
    20 		    , enable_sdltest=yes)
    21 
    22   min_sdl_version=ifelse([$1], ,1.2.0,$1)
    23 
    24   if test "x$sdl_prefix$sdl_exec_prefix" = x ; then
    25     PKG_CHECK_MODULES(SDL, [sdl >= $min_sdl_version],
    26            [sdl_pc=yes],
    27            [dnl
    28              AC_MSG_RESULT(no)
    29              sdl_pc=no
    30            ])
    31   else
    32     sdl_pc=no
    33     if test x$sdl_exec_prefix != x ; then
    34       sdl_config_args="$sdl_config_args --exec-prefix=$sdl_exec_prefix"
    35       if test x${SDL_CONFIG+set} != xset ; then
    36         SDL_CONFIG=$sdl_exec_prefix/bin/sdl-config
    37       fi
    38     fi
    39     if test x$sdl_prefix != x ; then
    40       sdl_config_args="$sdl_config_args --prefix=$sdl_prefix"
    41       if test x${SDL_CONFIG+set} != xset ; then
    42         SDL_CONFIG=$sdl_prefix/bin/sdl-config
    43       fi
    44     fi
    45   fi
    46 
    47   if test "x$sdl_pc" = xyes ; then
    48     no_sdl=""
    49     SDL_CONFIG="pkg-config sdl"
    50   else
    51     as_save_PATH="$PATH"
    52     if test "x$prefix" != xNONE && test "$cross_compiling" != yes; then
    53       PATH="$prefix/bin:$prefix/usr/bin:$PATH"
    54     fi
    55     AC_PATH_PROG(SDL_CONFIG, sdl-config, no, [$PATH])
    56     PATH="$as_save_PATH"
    57     AC_MSG_CHECKING(for SDL - version >= $min_sdl_version)
    58     no_sdl=""
    59 
    60     if test "$SDL_CONFIG" = "no" ; then
    61       no_sdl=yes
    62     else
    63       SDL_CFLAGS=`$SDL_CONFIG $sdl_config_args --cflags`
    64       SDL_LIBS=`$SDL_CONFIG $sdl_config_args --libs`
    65 
    66       sdl_major_version=`$SDL_CONFIG $sdl_config_args --version | \
    67              sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
    68       sdl_minor_version=`$SDL_CONFIG $sdl_config_args --version | \
    69              sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`
    70       sdl_micro_version=`$SDL_CONFIG $sdl_config_args --version | \
    71              sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`
    72       if test "x$enable_sdltest" = "xyes" ; then
    73         ac_save_CFLAGS="$CFLAGS"
    74         ac_save_CXXFLAGS="$CXXFLAGS"
    75         ac_save_LIBS="$LIBS"
    76         CFLAGS="$CFLAGS $SDL_CFLAGS"
    77         CXXFLAGS="$CXXFLAGS $SDL_CFLAGS"
    78         LIBS="$LIBS $SDL_LIBS"
    79 dnl
    80 dnl Now check if the installed SDL is sufficiently new. (Also sanity
    81 dnl checks the results of sdl-config to some extent
    82 dnl
    83       rm -f conf.sdltest
    84       AC_TRY_RUN([
    85 #include <stdio.h>
    86 #include <stdlib.h>
    87 #include <string.h>
    88 #include "SDL.h"
    89 
    90 char*
    91 my_strdup (char *str)
    92 {
    93   char *new_str;
    94   
    95   if (str)
    96     {
    97       new_str = (char *)malloc ((strlen (str) + 1) * sizeof(char));
    98       strcpy (new_str, str);
    99     }
   100   else
   101     new_str = NULL;
   102   
   103   return new_str;
   104 }
   105 
   106 int main (int argc, char *argv[])
   107 {
   108   int major, minor, micro;
   109   char *tmp_version;
   110 
   111   /* This hangs on some systems (?)
   112   system ("touch conf.sdltest");
   113   */
   114   { FILE *fp = fopen("conf.sdltest", "a"); if ( fp ) fclose(fp); }
   115 
   116   /* HP/UX 9 (%@#!) writes to sscanf strings */
   117   tmp_version = my_strdup("$min_sdl_version");
   118   if (sscanf(tmp_version, "%d.%d.%d", &major, &minor, &micro) != 3) {
   119      printf("%s, bad version string\n", "$min_sdl_version");
   120      exit(1);
   121    }
   122 
   123    if (($sdl_major_version > major) ||
   124       (($sdl_major_version == major) && ($sdl_minor_version > minor)) ||
   125       (($sdl_major_version == major) && ($sdl_minor_version == minor) && ($sdl_micro_version >= micro)))
   126     {
   127       return 0;
   128     }
   129   else
   130     {
   131       printf("\n*** 'sdl-config --version' returned %d.%d.%d, but the minimum version\n", $sdl_major_version, $sdl_minor_version, $sdl_micro_version);
   132       printf("*** of SDL required is %d.%d.%d. If sdl-config is correct, then it is\n", major, minor, micro);
   133       printf("*** best to upgrade to the required version.\n");
   134       printf("*** If sdl-config was wrong, set the environment variable SDL_CONFIG\n");
   135       printf("*** to point to the correct copy of sdl-config, and remove the file\n");
   136       printf("*** config.cache before re-running configure\n");
   137       return 1;
   138     }
   139 }
   140 
   141 ],, no_sdl=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"])
   142         CFLAGS="$ac_save_CFLAGS"
   143         CXXFLAGS="$ac_save_CXXFLAGS"
   144         LIBS="$ac_save_LIBS"
   145       fi
   146     fi
   147     if test "x$no_sdl" = x ; then
   148       AC_MSG_RESULT(yes)
   149     else
   150       AC_MSG_RESULT(no)
   151     fi
   152   fi
   153   if test "x$no_sdl" = x ; then
   154      ifelse([$2], , :, [$2])
   155   else
   156      if test "$SDL_CONFIG" = "no" ; then
   157        echo "*** The sdl-config script installed by SDL could not be found"
   158        echo "*** If SDL was installed in PREFIX, make sure PREFIX/bin is in"
   159        echo "*** your path, or set the SDL_CONFIG environment variable to the"
   160        echo "*** full path to sdl-config."
   161      else
   162        if test -f conf.sdltest ; then
   163         :
   164        else
   165           echo "*** Could not run SDL test program, checking why..."
   166           CFLAGS="$CFLAGS $SDL_CFLAGS"
   167           CXXFLAGS="$CXXFLAGS $SDL_CFLAGS"
   168           LIBS="$LIBS $SDL_LIBS"
   169           AC_TRY_LINK([
   170 #include <stdio.h>
   171 #include "SDL.h"
   172 
   173 int main(int argc, char *argv[])
   174 { return 0; }
   175 #undef  main
   176 #define main K_and_R_C_main
   177 ],      [ return 0; ],
   178         [ echo "*** The test program compiled, but did not run. This usually means"
   179           echo "*** that the run-time linker is not finding SDL or finding the wrong"
   180           echo "*** version of SDL. If it is not finding SDL, you'll need to set your"
   181           echo "*** LD_LIBRARY_PATH environment variable, or edit /etc/ld.so.conf to point"
   182           echo "*** to the installed location  Also, make sure you have run ldconfig if that"
   183           echo "*** is required on your system"
   184 	  echo "***"
   185           echo "*** If you have an old version installed, it is best to remove it, although"
   186           echo "*** you may also be able to get things to work by modifying LD_LIBRARY_PATH"],
   187         [ echo "*** The test program failed to compile or link. See the file config.log for the"
   188           echo "*** exact error that occured. This usually means SDL was incorrectly installed"
   189           echo "*** or that you have moved SDL since it was installed. In the latter case, you"
   190           echo "*** may want to edit the sdl-config script: $SDL_CONFIG" ])
   191           CFLAGS="$ac_save_CFLAGS"
   192           CXXFLAGS="$ac_save_CXXFLAGS"
   193           LIBS="$ac_save_LIBS"
   194        fi
   195      fi
   196      SDL_CFLAGS=""
   197      SDL_LIBS=""
   198      ifelse([$3], , :, [$3])
   199   fi
   200   AC_SUBST(SDL_CFLAGS)
   201   AC_SUBST(SDL_LIBS)
   202   rm -f conf.sdltest
   203 ])