annotate sdl.m4 @ 0:74212992fb08

Initial revision
author Sam Lantinga <slouken@lokigames.com>
date Thu, 26 Apr 2001 16:45:43 +0000
parents
children cf2af46e9e2a
rev   line source
0
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1 # Configure paths for SDL
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2 # Sam Lantinga 9/21/99
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3 # stolen from Manish Singh
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4 # stolen back from Frank Belew
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5 # stolen from Manish Singh
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6 # Shamelessly stolen from Owen Taylor
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7
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8 dnl AM_PATH_SDL([MINIMUM-VERSION, [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]])
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9 dnl Test for SDL, and define SDL_CFLAGS and SDL_LIBS
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10 dnl
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11 AC_DEFUN(AM_PATH_SDL,
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12 [dnl
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13 dnl Get the cflags and libraries from the sdl-config script
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14 dnl
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15 AC_ARG_WITH(sdl-prefix,[ --with-sdl-prefix=PFX Prefix where SDL is installed (optional)],
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16 sdl_prefix="$withval", sdl_prefix="")
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17 AC_ARG_WITH(sdl-exec-prefix,[ --with-sdl-exec-prefix=PFX Exec prefix where SDL is installed (optional)],
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18 sdl_exec_prefix="$withval", sdl_exec_prefix="")
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19 AC_ARG_ENABLE(sdltest, [ --disable-sdltest Do not try to compile and run a test SDL program],
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20 , enable_sdltest=yes)
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21
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22 if test x$sdl_exec_prefix != x ; then
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23 sdl_args="$sdl_args --exec-prefix=$sdl_exec_prefix"
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24 if test x${SDL_CONFIG+set} != xset ; then
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25 SDL_CONFIG=$sdl_exec_prefix/bin/sdl-config
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26 fi
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27 fi
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28 if test x$sdl_prefix != x ; then
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29 sdl_args="$sdl_args --prefix=$sdl_prefix"
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30 if test x${SDL_CONFIG+set} != xset ; then
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31 SDL_CONFIG=$sdl_prefix/bin/sdl-config
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32 fi
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33 fi
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34
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35 AC_PATH_PROG(SDL_CONFIG, sdl-config, no)
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36 min_sdl_version=ifelse([$1], ,0.11.0,$1)
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37 AC_MSG_CHECKING(for SDL - version >= $min_sdl_version)
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38 no_sdl=""
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39 if test "$SDL_CONFIG" = "no" ; then
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40 no_sdl=yes
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41 else
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42 SDL_CFLAGS=`$SDL_CONFIG $sdlconf_args --cflags`
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43 SDL_LIBS=`$SDL_CONFIG $sdlconf_args --libs`
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44
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45 sdl_major_version=`$SDL_CONFIG $sdl_args --version | \
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46 sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
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47 sdl_minor_version=`$SDL_CONFIG $sdl_args --version | \
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48 sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`
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49 sdl_micro_version=`$SDL_CONFIG $sdl_config_args --version | \
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50 sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`
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51 if test "x$enable_sdltest" = "xyes" ; then
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52 ac_save_CFLAGS="$CFLAGS"
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53 ac_save_LIBS="$LIBS"
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54 CFLAGS="$CFLAGS $SDL_CFLAGS"
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55 LIBS="$LIBS $SDL_LIBS"
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56 dnl
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57 dnl Now check if the installed SDL is sufficiently new. (Also sanity
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58 dnl checks the results of sdl-config to some extent
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59 dnl
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60 rm -f conf.sdltest
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61 AC_TRY_RUN([
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62 #include <stdio.h>
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63 #include <stdlib.h>
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64 #include <string.h>
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65 #include "SDL.h"
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66
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67 char*
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68 my_strdup (char *str)
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69 {
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70 char *new_str;
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71
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72 if (str)
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73 {
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74 new_str = (char *)malloc ((strlen (str) + 1) * sizeof(char));
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75 strcpy (new_str, str);
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76 }
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77 else
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78 new_str = NULL;
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79
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80 return new_str;
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81 }
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82
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83 int main (int argc, char *argv[])
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84 {
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85 int major, minor, micro;
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86 char *tmp_version;
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87
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88 /* This hangs on some systems (?)
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89 system ("touch conf.sdltest");
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90 */
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91 { FILE *fp = fopen("conf.sdltest", "a"); if ( fp ) fclose(fp); }
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92
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93 /* HP/UX 9 (%@#!) writes to sscanf strings */
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94 tmp_version = my_strdup("$min_sdl_version");
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95 if (sscanf(tmp_version, "%d.%d.%d", &major, &minor, &micro) != 3) {
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96 printf("%s, bad version string\n", "$min_sdl_version");
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97 exit(1);
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98 }
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99
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100 if (($sdl_major_version > major) ||
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101 (($sdl_major_version == major) && ($sdl_minor_version > minor)) ||
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102 (($sdl_major_version == major) && ($sdl_minor_version == minor) && ($sdl_micro_version >= micro)))
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103 {
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104 return 0;
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105 }
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106 else
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107 {
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108 printf("\n*** 'sdl-config --version' returned %d.%d.%d, but the minimum version\n", $sdl_major_version, $sdl_minor_version, $sdl_micro_version);
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109 printf("*** of SDL required is %d.%d.%d. If sdl-config is correct, then it is\n", major, minor, micro);
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110 printf("*** best to upgrade to the required version.\n");
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111 printf("*** If sdl-config was wrong, set the environment variable SDL_CONFIG\n");
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112 printf("*** to point to the correct copy of sdl-config, and remove the file\n");
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113 printf("*** config.cache before re-running configure\n");
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114 return 1;
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115 }
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116 }
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117
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118 ],, no_sdl=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"])
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119 CFLAGS="$ac_save_CFLAGS"
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120 LIBS="$ac_save_LIBS"
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121 fi
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122 fi
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123 if test "x$no_sdl" = x ; then
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124 AC_MSG_RESULT(yes)
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125 ifelse([$2], , :, [$2])
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126 else
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127 AC_MSG_RESULT(no)
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128 if test "$SDL_CONFIG" = "no" ; then
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129 echo "*** The sdl-config script installed by SDL could not be found"
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130 echo "*** If SDL was installed in PREFIX, make sure PREFIX/bin is in"
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131 echo "*** your path, or set the SDL_CONFIG environment variable to the"
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132 echo "*** full path to sdl-config."
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133 else
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134 if test -f conf.sdltest ; then
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135 :
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136 else
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137 echo "*** Could not run SDL test program, checking why..."
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138 CFLAGS="$CFLAGS $SDL_CFLAGS"
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139 LIBS="$LIBS $SDL_LIBS"
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140 AC_TRY_LINK([
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141 #include <stdio.h>
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142 #include "SDL.h"
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143 ], [ return 0; ],
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144 [ echo "*** The test program compiled, but did not run. This usually means"
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145 echo "*** that the run-time linker is not finding SDL or finding the wrong"
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146 echo "*** version of SDL. If it is not finding SDL, you'll need to set your"
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147 echo "*** LD_LIBRARY_PATH environment variable, or edit /etc/ld.so.conf to point"
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148 echo "*** to the installed location Also, make sure you have run ldconfig if that"
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149 echo "*** is required on your system"
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150 echo "***"
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151 echo "*** If you have an old version installed, it is best to remove it, although"
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152 echo "*** you may also be able to get things to work by modifying LD_LIBRARY_PATH"],
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153 [ echo "*** The test program failed to compile or link. See the file config.log for the"
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154 echo "*** exact error that occured. This usually means SDL was incorrectly installed"
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155 echo "*** or that you have moved SDL since it was installed. In the latter case, you"
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156 echo "*** may want to edit the sdl-config script: $SDL_CONFIG" ])
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157 CFLAGS="$ac_save_CFLAGS"
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158 LIBS="$ac_save_LIBS"
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159 fi
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160 fi
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161 SDL_CFLAGS=""
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162 SDL_LIBS=""
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163 ifelse([$3], , :, [$3])
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164 fi
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165 AC_SUBST(SDL_CFLAGS)
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166 AC_SUBST(SDL_LIBS)
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167 rm -f conf.sdltest
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168 ])