sdl2.m4
author bschaefer
Sun, 21 Feb 2016 15:19:35 -0800
changeset 10089 25fda20d0173
parent 7492 98de3e4f1c36
child 10382 9befd0acb9ef
permissions -rw-r--r--
Fix API/ABI breakage in Mir 0.13/0.14.
     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 # serial 1
     9 
    10 dnl AM_PATH_SDL2([MINIMUM-VERSION, [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]])
    11 dnl Test for SDL, and define SDL_CFLAGS and SDL_LIBS
    12 dnl
    13 AC_DEFUN([AM_PATH_SDL2],
    14 [dnl 
    15 dnl Get the cflags and libraries from the sdl2-config script
    16 dnl
    17 AC_ARG_WITH(sdl-prefix,[  --with-sdl-prefix=PFX   Prefix where SDL is installed (optional)],
    18             sdl_prefix="$withval", sdl_prefix="")
    19 AC_ARG_WITH(sdl-exec-prefix,[  --with-sdl-exec-prefix=PFX Exec prefix where SDL is installed (optional)],
    20             sdl_exec_prefix="$withval", sdl_exec_prefix="")
    21 AC_ARG_ENABLE(sdltest, [  --disable-sdltest       Do not try to compile and run a test SDL program],
    22 		    , enable_sdltest=yes)
    23 
    24   min_sdl_version=ifelse([$1], ,2.0.0,$1)
    25 
    26   if test "x$sdl_prefix$sdl_exec_prefix" = x ; then
    27     PKG_CHECK_MODULES([SDL], [sdl2 >= $min_sdl_version],
    28            [sdl_pc=yes],
    29            [sdl_pc=no])
    30   else
    31     sdl_pc=no
    32     if test x$sdl_exec_prefix != x ; then
    33       sdl_config_args="$sdl_config_args --exec-prefix=$sdl_exec_prefix"
    34       if test x${SDL2_CONFIG+set} != xset ; then
    35         SDL2_CONFIG=$sdl_exec_prefix/bin/sdl2-config
    36       fi
    37     fi
    38     if test x$sdl_prefix != x ; then
    39       sdl_config_args="$sdl_config_args --prefix=$sdl_prefix"
    40       if test x${SDL2_CONFIG+set} != xset ; then
    41         SDL2_CONFIG=$sdl_prefix/bin/sdl2-config
    42       fi
    43     fi
    44   fi
    45 
    46   if test "x$sdl_pc" = xyes ; then
    47     no_sdl=""
    48     SDL2_CONFIG="pkg-config sdl2"
    49   else
    50     as_save_PATH="$PATH"
    51     if test "x$prefix" != xNONE && test "$cross_compiling" != yes; then
    52       PATH="$prefix/bin:$prefix/usr/bin:$PATH"
    53     fi
    54     AC_PATH_PROG(SDL2_CONFIG, sdl2-config, no, [$PATH])
    55     PATH="$as_save_PATH"
    56     AC_MSG_CHECKING(for SDL - version >= $min_sdl_version)
    57     no_sdl=""
    58 
    59     if test "$SDL2_CONFIG" = "no" ; then
    60       no_sdl=yes
    61     else
    62       SDL_CFLAGS=`$SDL2_CONFIG $sdl_config_args --cflags`
    63       SDL_LIBS=`$SDL2_CONFIG $sdl_config_args --libs`
    64 
    65       sdl_major_version=`$SDL2_CONFIG $sdl_config_args --version | \
    66              sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
    67       sdl_minor_version=`$SDL2_CONFIG $sdl_config_args --version | \
    68              sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`
    69       sdl_micro_version=`$SDL2_CONFIG $sdl_config_args --version | \
    70              sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`
    71       if test "x$enable_sdltest" = "xyes" ; then
    72         ac_save_CFLAGS="$CFLAGS"
    73         ac_save_CXXFLAGS="$CXXFLAGS"
    74         ac_save_LIBS="$LIBS"
    75         CFLAGS="$CFLAGS $SDL_CFLAGS"
    76         CXXFLAGS="$CXXFLAGS $SDL_CFLAGS"
    77         LIBS="$LIBS $SDL_LIBS"
    78 dnl
    79 dnl Now check if the installed SDL is sufficiently new. (Also sanity
    80 dnl checks the results of sdl2-config to some extent
    81 dnl
    82       rm -f conf.sdltest
    83       AC_TRY_RUN([
    84 #include <stdio.h>
    85 #include <stdlib.h>
    86 #include <string.h>
    87 #include "SDL.h"
    88 
    89 char*
    90 my_strdup (char *str)
    91 {
    92   char *new_str;
    93   
    94   if (str)
    95     {
    96       new_str = (char *)malloc ((strlen (str) + 1) * sizeof(char));
    97       strcpy (new_str, str);
    98     }
    99   else
   100     new_str = NULL;
   101   
   102   return new_str;
   103 }
   104 
   105 int main (int argc, char *argv[])
   106 {
   107   int major, minor, micro;
   108   char *tmp_version;
   109 
   110   /* This hangs on some systems (?)
   111   system ("touch conf.sdltest");
   112   */
   113   { FILE *fp = fopen("conf.sdltest", "a"); if ( fp ) fclose(fp); }
   114 
   115   /* HP/UX 9 (%@#!) writes to sscanf strings */
   116   tmp_version = my_strdup("$min_sdl_version");
   117   if (sscanf(tmp_version, "%d.%d.%d", &major, &minor, &micro) != 3) {
   118      printf("%s, bad version string\n", "$min_sdl_version");
   119      exit(1);
   120    }
   121 
   122    if (($sdl_major_version > major) ||
   123       (($sdl_major_version == major) && ($sdl_minor_version > minor)) ||
   124       (($sdl_major_version == major) && ($sdl_minor_version == minor) && ($sdl_micro_version >= micro)))
   125     {
   126       return 0;
   127     }
   128   else
   129     {
   130       printf("\n*** 'sdl2-config --version' returned %d.%d.%d, but the minimum version\n", $sdl_major_version, $sdl_minor_version, $sdl_micro_version);
   131       printf("*** of SDL required is %d.%d.%d. If sdl2-config is correct, then it is\n", major, minor, micro);
   132       printf("*** best to upgrade to the required version.\n");
   133       printf("*** If sdl2-config was wrong, set the environment variable SDL2_CONFIG\n");
   134       printf("*** to point to the correct copy of sdl2-config, and remove the file\n");
   135       printf("*** config.cache before re-running configure\n");
   136       return 1;
   137     }
   138 }
   139 
   140 ],, no_sdl=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"])
   141         CFLAGS="$ac_save_CFLAGS"
   142         CXXFLAGS="$ac_save_CXXFLAGS"
   143         LIBS="$ac_save_LIBS"
   144       fi
   145     fi
   146     if test "x$no_sdl" = x ; then
   147       AC_MSG_RESULT(yes)
   148     else
   149       AC_MSG_RESULT(no)
   150     fi
   151   fi
   152   if test "x$no_sdl" = x ; then
   153      ifelse([$2], , :, [$2])
   154   else
   155      if test "$SDL2_CONFIG" = "no" ; then
   156        echo "*** The sdl2-config script installed by SDL could not be found"
   157        echo "*** If SDL was installed in PREFIX, make sure PREFIX/bin is in"
   158        echo "*** your path, or set the SDL2_CONFIG environment variable to the"
   159        echo "*** full path to sdl2-config."
   160      else
   161        if test -f conf.sdltest ; then
   162         :
   163        else
   164           echo "*** Could not run SDL test program, checking why..."
   165           CFLAGS="$CFLAGS $SDL_CFLAGS"
   166           CXXFLAGS="$CXXFLAGS $SDL_CFLAGS"
   167           LIBS="$LIBS $SDL_LIBS"
   168           AC_TRY_LINK([
   169 #include <stdio.h>
   170 #include "SDL.h"
   171 
   172 int main(int argc, char *argv[])
   173 { return 0; }
   174 #undef  main
   175 #define main K_and_R_C_main
   176 ],      [ return 0; ],
   177         [ echo "*** The test program compiled, but did not run. This usually means"
   178           echo "*** that the run-time linker is not finding SDL or finding the wrong"
   179           echo "*** version of SDL. If it is not finding SDL, you'll need to set your"
   180           echo "*** LD_LIBRARY_PATH environment variable, or edit /etc/ld.so.conf to point"
   181           echo "*** to the installed location  Also, make sure you have run ldconfig if that"
   182           echo "*** is required on your system"
   183 	  echo "***"
   184           echo "*** If you have an old version installed, it is best to remove it, although"
   185           echo "*** you may also be able to get things to work by modifying LD_LIBRARY_PATH"],
   186         [ echo "*** The test program failed to compile or link. See the file config.log for the"
   187           echo "*** exact error that occured. This usually means SDL was incorrectly installed"
   188           echo "*** or that you have moved SDL since it was installed. In the latter case, you"
   189           echo "*** may want to edit the sdl2-config script: $SDL2_CONFIG" ])
   190           CFLAGS="$ac_save_CFLAGS"
   191           CXXFLAGS="$ac_save_CXXFLAGS"
   192           LIBS="$ac_save_LIBS"
   193        fi
   194      fi
   195      SDL_CFLAGS=""
   196      SDL_LIBS=""
   197      ifelse([$3], , :, [$3])
   198   fi
   199   AC_SUBST(SDL_CFLAGS)
   200   AC_SUBST(SDL_LIBS)
   201   rm -f conf.sdltest
   202 ])