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
10dnl AM_PATH_SDL([MINIMUM-VERSION, [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]])
11dnl Test for SDL, and define SDL_CFLAGS and SDL_LIBS
12dnl
13AC_DEFUN([AM_PATH_SDL2],
14[dnl
15dnl Get the cflags and libraries from the sdl2-config script
16dnl
17AC_ARG_WITH(sdl-prefix,[  --with-sdl-prefix=PFX   Prefix where SDL is installed (optional)],
18            sdl_prefix="$withval", sdl_prefix="")
19AC_ARG_WITH(sdl-exec-prefix,[  --with-sdl-exec-prefix=PFX Exec prefix where SDL is installed (optional)],
20            sdl_exec_prefix="$withval", sdl_exec_prefix="")
21AC_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], ,0.9.0,$1)
25
26  if test "x$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${SDL_CONFIG+set} != xset ; then
35        SDL_CONFIG=$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=$sdl_prefix"
40      if test x${SDL_CONFIG+set} != xset ; then
41        SDL_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    SDL_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(SDL_CONFIG, sdl2-config, no, [$PATH])
55    PATH="$as_save_PATH"
56    AC_MSG_CHECKING(for SDL - version >= $min_sdl_version)
57    no_sdl=""
58
59    if test "$SDL_CONFIG" = "no" ; then
60      no_sdl=yes
61    else
62      SDL_CFLAGS=`$SDL_CONFIG $sdl_config_args --cflags`
63      SDL_LIBS=`$SDL_CONFIG $sdl_config_args --libs`
64
65      sdl_major_version=`$SDL_CONFIG $sdl_config_args --version | \
66             sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
67      sdl_minor_version=`$SDL_CONFIG $sdl_config_args --version | \
68             sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`
69      sdl_micro_version=`$SDL_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 $SDL_LIBS"
78dnl
79dnl Now check if the installed SDL is sufficiently new. (Also sanity
80dnl checks the results of sdl2-config to some extent
81dnl
82      rm -f conf.sdltest
83      AC_TRY_RUN([
84#include <stdio.h>
85#include <stdlib.h>
86#include <string.h>
87#include "SDL.h"
88
89char*
90my_strdup (char *str)
91{
92  char *new_str;
93
94  if (str)
95    {
96      new_str = (char *)malloc ((strlen (str) + 1) * sizeof(char));
97      strcpy (new_str, str);
98    }
99  else
100    new_str = NULL;
101
102  return new_str;
103}
104
105int main (int argc, char *argv[])
106{
107  int major, minor, micro;
108  char *tmp_version;
109
110  /* This hangs on some systems (?)
111  system ("touch conf.sdltest");
112  */
113  { FILE *fp = fopen("conf.sdltest", "a"); if ( fp ) fclose(fp); }
114
115  /* HP/UX 9 (%@#!) writes to sscanf strings */
116  tmp_version = my_strdup("$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 SDL_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], , :, [$2])
154  else
155     if test "$SDL_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 SDL_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
172int 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: $SDL_CONFIG" ])
190          CFLAGS="$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], , :, [$3])
198  fi
199  AC_SUBST(SDL_CFLAGS)
200  AC_SUBST(SDL_LIBS)
201  rm -f conf.sdltest
202])
203# pkg.m4 - Macros to locate and utilise pkg-config.            -*- Autoconf -*-
204# serial 1 (pkg-config-0.24)
205#
206# Copyright © 2004 Scott James Remnant <scott@netsplit.com>.
207#
208# This program is free software; you can redistribute it and/or modify
209# it under the terms of the GNU General Public License as published by
210# the Free Software Foundation; either version 2 of the License, or
211# (at your option) any later version.
212#
213# This program is distributed in the hope that it will be useful, but
214# WITHOUT ANY WARRANTY; without even the implied warranty of
215# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
216# General Public License for more details.
217#
218# You should have received a copy of the GNU General Public License
219# along with this program; if not, write to the Free Software
220# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
221#
222# As a special exception to the GNU General Public License, if you
223# distribute this file as part of a program that contains a
224# configuration script generated by Autoconf, you may include it under
225# the same distribution terms that you use for the rest of that program.
226
227# PKG_PROG_PKG_CONFIG([MIN-VERSION])
228# ----------------------------------
229AC_DEFUN([PKG_PROG_PKG_CONFIG],
230[m4_pattern_forbid([^_?PKG_[A-Z_]+$])
231m4_pattern_allow([^PKG_CONFIG(_PATH)?$])
232AC_ARG_VAR([PKG_CONFIG], [path to pkg-config utility])
233AC_ARG_VAR([PKG_CONFIG_PATH], [directories to add to pkg-config's search path])
234AC_ARG_VAR([PKG_CONFIG_LIBDIR], [path overriding pkg-config's built-in search path])
235
236if test "x$ac_cv_env_PKG_CONFIG_set" != "xset"; then
237	AC_PATH_TOOL([PKG_CONFIG], [pkg-config])
238fi
239if test -n "$PKG_CONFIG"; then
240	_pkg_min_version=m4_default([$1], [0.9.0])
241	AC_MSG_CHECKING([pkg-config is at least version $_pkg_min_version])
242	if $PKG_CONFIG --atleast-pkgconfig-version $_pkg_min_version; then
243		AC_MSG_RESULT([yes])
244	else
245		AC_MSG_RESULT([no])
246		PKG_CONFIG=""
247	fi
248fi[]dnl
249])# PKG_PROG_PKG_CONFIG
250
251# PKG_CHECK_EXISTS(MODULES, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
252#
253# Check to see whether a particular set of modules exists.  Similar
254# to PKG_CHECK_MODULES(), but does not set variables or print errors.
255#
256# Please remember that m4 expands AC_REQUIRE([PKG_PROG_PKG_CONFIG])
257# only at the first occurence in configure.ac, so if the first place
258# it's called might be skipped (such as if it is within an "if", you
259# have to call PKG_CHECK_EXISTS manually
260# --------------------------------------------------------------
261AC_DEFUN([PKG_CHECK_EXISTS],
262[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
263if test -n "$PKG_CONFIG" && \
264    AC_RUN_LOG([$PKG_CONFIG --exists --print-errors "$1"]); then
265  m4_default([$2], [:])
266m4_ifvaln([$3], [else
267  $3])dnl
268fi])
269
270# _PKG_CONFIG([VARIABLE], [COMMAND], [MODULES])
271# ---------------------------------------------
272m4_define([_PKG_CONFIG],
273[if test -n "$$1"; then
274    pkg_cv_[]$1="$$1"
275 elif test -n "$PKG_CONFIG"; then
276    PKG_CHECK_EXISTS([$3],
277                     [pkg_cv_[]$1=`$PKG_CONFIG --[]$2 "$3" 2>/dev/null`],
278		     [pkg_failed=yes])
279 else
280    pkg_failed=untried
281fi[]dnl
282])# _PKG_CONFIG
283
284# _PKG_SHORT_ERRORS_SUPPORTED
285# -----------------------------
286AC_DEFUN([_PKG_SHORT_ERRORS_SUPPORTED],
287[AC_REQUIRE([PKG_PROG_PKG_CONFIG])
288if $PKG_CONFIG --atleast-pkgconfig-version 0.20; then
289        _pkg_short_errors_supported=yes
290else
291        _pkg_short_errors_supported=no
292fi[]dnl
293])# _PKG_SHORT_ERRORS_SUPPORTED
294
295
296# PKG_CHECK_MODULES(VARIABLE-PREFIX, MODULES, [ACTION-IF-FOUND],
297# [ACTION-IF-NOT-FOUND])
298#
299#
300# Note that if there is a possibility the first call to
301# PKG_CHECK_MODULES might not happen, you should be sure to include an
302# explicit call to PKG_PROG_PKG_CONFIG in your configure.ac
303#
304#
305# --------------------------------------------------------------
306AC_DEFUN([PKG_CHECK_MODULES],
307[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
308AC_ARG_VAR([$1][_CFLAGS], [C compiler flags for $1, overriding pkg-config])dnl
309AC_ARG_VAR([$1][_LIBS], [linker flags for $1, overriding pkg-config])dnl
310
311pkg_failed=no
312AC_MSG_CHECKING([for $1])
313
314_PKG_CONFIG([$1][_CFLAGS], [cflags], [$2])
315_PKG_CONFIG([$1][_LIBS], [libs], [$2])
316
317m4_define([_PKG_TEXT], [Alternatively, you may set the environment variables $1[]_CFLAGS
318and $1[]_LIBS to avoid the need to call pkg-config.
319See the pkg-config man page for more details.])
320
321if test $pkg_failed = yes; then
322   	AC_MSG_RESULT([no])
323        _PKG_SHORT_ERRORS_SUPPORTED
324        if test $_pkg_short_errors_supported = yes; then
325	        $1[]_PKG_ERRORS=`$PKG_CONFIG --short-errors --print-errors "$2" 2>&1`
326        else
327	        $1[]_PKG_ERRORS=`$PKG_CONFIG --print-errors "$2" 2>&1`
328        fi
329	# Put the nasty error message in config.log where it belongs
330	echo "$$1[]_PKG_ERRORS" >&AS_MESSAGE_LOG_FD
331
332	m4_default([$4], [AC_MSG_ERROR(
333[Package requirements ($2) were not met:
334
335$$1_PKG_ERRORS
336
337Consider adjusting the PKG_CONFIG_PATH environment variable if you
338installed software in a non-standard prefix.
339
340_PKG_TEXT])dnl
341        ])
342elif test $pkg_failed = untried; then
343     	AC_MSG_RESULT([no])
344	m4_default([$4], [AC_MSG_FAILURE(
345[The pkg-config script could not be found or is too old.  Make sure it
346is in your PATH or set the PKG_CONFIG environment variable to the full
347path to pkg-config.
348
349_PKG_TEXT
350
351To get pkg-config, see <http://pkg-config.freedesktop.org/>.])dnl
352        ])
353else
354	$1[]_CFLAGS=$pkg_cv_[]$1[]_CFLAGS
355	$1[]_LIBS=$pkg_cv_[]$1[]_LIBS
356        AC_MSG_RESULT([yes])
357	$3
358fi[]dnl
359])# PKG_CHECK_MODULES
360