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annotate acinclude/esd.m4 @ 5133:ec13e48ee0d9

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Fixed bug #1112 (retina display support) Vittorio Giovara 2011-02-01 02:21:50 PST with the attached patch, the opengles context will always use the maximum screensize available; this is particularly useful for supporting retina display on latest iphone. please note: Apple documentation warns that using the "upscaled" gl context actually uses more memory and bandwitdh, so it might be worth to let the user decide whether to disable it or not, either with a flag or a sdl function...
author Sam Lantinga <slouken@libsdl.org>
date Tue, 01 Feb 2011 08:54:34 -0800
parents 3da232c5980a
children
rev   line source
3342
3da232c5980a Split acinclude.m4 into its constituent parts for easy upgrading
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1 ##############################################################################
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2 #
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3 # --- esd.m4 ---
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4 #
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5 # Configure paths for ESD
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6 # Manish Singh 98-9-30
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7 # stolen back from Frank Belew
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8 # stolen from Manish Singh
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9 # Shamelessly stolen from Owen Taylor
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10
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11 dnl AM_PATH_ESD([MINIMUM-VERSION, [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]])
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12 dnl Test for ESD, and define ESD_CFLAGS and ESD_LIBS
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13 dnl
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14 AC_DEFUN([AM_PATH_ESD],
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15 [dnl
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16 dnl Get the cflags and libraries from the esd-config script
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17 dnl
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18 AC_ARG_WITH(esd-prefix,[ --with-esd-prefix=PFX Prefix where ESD is installed (optional)],
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19 esd_prefix="$withval", esd_prefix="")
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20 AC_ARG_WITH(esd-exec-prefix,[ --with-esd-exec-prefix=PFX Exec prefix where ESD is installed (optional)],
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21 esd_exec_prefix="$withval", esd_exec_prefix="")
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22 AC_ARG_ENABLE(esdtest, [ --disable-esdtest Do not try to compile and run a test ESD program],
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23 , enable_esdtest=yes)
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24
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25 if test x$esd_exec_prefix != x ; then
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26 esd_args="$esd_args --exec-prefix=$esd_exec_prefix"
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27 if test x${ESD_CONFIG+set} != xset ; then
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28 ESD_CONFIG=$esd_exec_prefix/bin/esd-config
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29 fi
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30 fi
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31 if test x$esd_prefix != x ; then
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32 esd_args="$esd_args --prefix=$esd_prefix"
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33 if test x${ESD_CONFIG+set} != xset ; then
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34 ESD_CONFIG=$esd_prefix/bin/esd-config
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35 fi
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36 fi
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37
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38 AC_PATH_PROG(ESD_CONFIG, esd-config, no)
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39 min_esd_version=ifelse([$1], ,0.2.7,$1)
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40 AC_MSG_CHECKING(for ESD - version >= $min_esd_version)
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41 no_esd=""
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42 if test "$ESD_CONFIG" = "no" ; then
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43 no_esd=yes
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44 else
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45 ESD_CFLAGS=`$ESD_CONFIG $esdconf_args --cflags`
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46 ESD_LIBS=`$ESD_CONFIG $esdconf_args --libs`
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47
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48 esd_major_version=`$ESD_CONFIG $esd_args --version | \
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49 sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
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50 esd_minor_version=`$ESD_CONFIG $esd_args --version | \
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51 sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`
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52 esd_micro_version=`$ESD_CONFIG $esd_config_args --version | \
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53 sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`
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54 if test "x$enable_esdtest" = "xyes" ; then
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55 ac_save_CFLAGS="$CFLAGS"
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56 ac_save_LIBS="$LIBS"
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57 CFLAGS="$CFLAGS $ESD_CFLAGS"
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58 LIBS="$LIBS $ESD_LIBS"
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59 dnl
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60 dnl Now check if the installed ESD is sufficiently new. (Also sanity
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61 dnl checks the results of esd-config to some extent
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62 dnl
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63 rm -f conf.esdtest
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64 AC_TRY_RUN([
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65 #include <stdio.h>
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66 #include <stdlib.h>
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67 #include <string.h>
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68 #include <esd.h>
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69
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70 char*
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71 my_strdup (char *str)
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72 {
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73 char *new_str;
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74
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75 if (str)
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76 {
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77 new_str = malloc ((strlen (str) + 1) * sizeof(char));
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78 strcpy (new_str, str);
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79 }
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80 else
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81 new_str = NULL;
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82
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83 return new_str;
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84 }
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85
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86 int main ()
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87 {
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88 int major, minor, micro;
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89 char *tmp_version;
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90
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91 system ("touch conf.esdtest");
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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_esd_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", "$min_esd_version");
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97 exit(1);
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98 }
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99
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100 if (($esd_major_version > major) ||
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101 (($esd_major_version == major) && ($esd_minor_version > minor)) ||
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102 (($esd_major_version == major) && ($esd_minor_version == minor) && ($esd_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*** 'esd-config --version' returned %d.%d.%d, but the minimum version\n", $esd_major_version, $esd_minor_version, $esd_micro_version);
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109 printf("*** of ESD required is %d.%d.%d. If esd-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 esd-config was wrong, set the environment variable ESD_CONFIG\n");
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112 printf("*** to point to the correct copy of esd-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_esd=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_esd" = x ; then
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124 AC_MSG_RESULT(yes)
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125 ifelse([$2], , :, [$2])
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126 else
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127 AC_MSG_RESULT(no)
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128 if test "$ESD_CONFIG" = "no" ; then
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129 echo "*** The esd-config script installed by ESD could not be found"
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130 echo "*** If ESD was installed in PREFIX, make sure PREFIX/bin is in"
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131 echo "*** your path, or set the ESD_CONFIG environment variable to the"
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132 echo "*** full path to esd-config."
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133 else
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134 if test -f conf.esdtest ; then
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135 :
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136 else
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137 echo "*** Could not run ESD test program, checking why..."
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138 CFLAGS="$CFLAGS $ESD_CFLAGS"
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139 LIBS="$LIBS $ESD_LIBS"
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140 AC_TRY_LINK([
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141 #include <stdio.h>
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142 #include <esd.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 ESD or finding the wrong"
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146 echo "*** version of ESD. If it is not finding ESD, 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 ESD was incorrectly installed"
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155 echo "*** or that you have moved ESD since it was installed. In the latter case, you"
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156 echo "*** may want to edit the esd-config script: $ESD_CONFIG" ])
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157 CFLAGS="$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 ESD_CFLAGS=""
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162 ESD_LIBS=""
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163 ifelse([$3], , :, [$3])
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164 fi
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165 AC_SUBST(ESD_CFLAGS)
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166 AC_SUBST(ESD_LIBS)
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167 rm -f conf.esdtest
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168 ])