From 0e48eb26392bab1579f40fdb636cc54ae8154b2a Mon Sep 17 00:00:00 2001
From: "Haelwenn (lanodan) Monnier" <[EMAIL REDACTED]>
Date: Wed, 9 Jun 2021 21:17:29 +0200
Subject: [PATCH] Add sdl.m4
Copied from SDL-1.2, the equivalent in SDL2 is similar enough that licensing
shouldn't be an issue.
It is needed to use autoconf on software like smpeg, which has been used to
test this.
---
CMakeLists.txt | 2 +
sdl.m4 | 180 +++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 182 insertions(+)
create mode 100644 sdl.m4
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4206f93..796dc0b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -198,5 +198,7 @@ if(SDL12DEVEL)
WORKING_DIRECTORY \"${CMAKE_BINARY_DIR}\")")
install(FILES ${CMAKE_BINARY_DIR}/libSDL${SOPOSTFIX}${SOEXT} DESTINATION "${CMAKE_INSTALL_LIBDIR}")
endif()
+
+ install(FILES "${CMAKE_SOURCE_DIR}/sdl.m4" DESTINATION "${CMAKE_INSTALL_FULL_DATAROOTDIR}/aclocal")
endif()
diff --git a/sdl.m4 b/sdl.m4
new file mode 100644
index 0000000..30e1f21
--- /dev/null
+++ b/sdl.m4
@@ -0,0 +1,180 @@
+# Configure paths for SDL
+# Sam Lantinga 9/21/99
+# stolen from Manish Singh
+# stolen back from Frank Belew
+# stolen from Manish Singh
+# Shamelessly stolen from Owen Taylor
+
+# serial 2
+
+dnl AM_PATH_SDL([MINIMUM-VERSION, [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]])
+dnl Test for SDL, and define SDL_CFLAGS and SDL_LIBS
+dnl
+AC_DEFUN([AM_PATH_SDL],
+[dnl
+dnl Get the cflags and libraries from the sdl-config script
+dnl
+AC_ARG_WITH(sdl-prefix,[ --with-sdl-prefix=PFX Prefix where SDL is installed (optional)],
+ sdl_prefix="$withval", sdl_prefix="")
+AC_ARG_WITH(sdl-exec-prefix,[ --with-sdl-exec-prefix=PFX Exec prefix where SDL is installed (optional)],
+ sdl_exec_prefix="$withval", sdl_exec_prefix="")
+AC_ARG_ENABLE(sdltest, [ --disable-sdltest Do not try to compile and run a test SDL program],
+ , enable_sdltest=yes)
+
+ min_sdl_version=ifelse([$1], ,1.2.0,$1)
+
+ if test "x$sdl_prefix$sdl_exec_prefix" = x ; then
+ PKG_CHECK_MODULES([SDL], [sdl >= $min_sdl_version],
+ [sdl_pc=yes],
+ [sdl_pc=no])
+ else
+ sdl_pc=no
+ if test x$sdl_exec_prefix != x ; then
+ sdl_config_args="$sdl_config_args --exec-prefix=$sdl_exec_prefix"
+ if test x${SDL_CONFIG+set} != xset ; then
+ SDL_CONFIG=$sdl_exec_prefix/bin/sdl-config
+ fi
+ fi
+ if test x$sdl_prefix != x ; then
+ sdl_config_args="$sdl_config_args --prefix=$sdl_prefix"
+ if test x${SDL_CONFIG+set} != xset ; then
+ SDL_CONFIG=$sdl_prefix/bin/sdl-config
+ fi
+ fi
+ fi
+
+ if test "x$sdl_pc" = xyes ; then
+ no_sdl=""
+ SDL_CONFIG="pkg-config sdl"
+ else
+ as_save_PATH="$PATH"
+ if test "x$prefix" != xNONE && test "$cross_compiling" != yes; then
+ PATH="$prefix/bin:$prefix/usr/bin:$PATH"
+ fi
+ AC_PATH_PROG(SDL_CONFIG, sdl-config, no, [$PATH])
+ PATH="$as_save_PATH"
+ AC_MSG_CHECKING(for SDL - version >= $min_sdl_version)
+ no_sdl=""
+
+ if test "$SDL_CONFIG" = "no" ; then
+ no_sdl=yes
+ else
+ SDL_CFLAGS=`$SDL_CONFIG $sdl_config_args --cflags`
+ SDL_LIBS=`$SDL_CONFIG $sdl_config_args --libs`
+
+ sdl_major_version=`$SDL_CONFIG $sdl_config_args --version | \
+ sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
+ sdl_minor_version=`$SDL_CONFIG $sdl_config_args --version | \
+ sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`
+ sdl_micro_version=`$SDL_CONFIG $sdl_config_args --version | \
+ sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`
+ if test "x$enable_sdltest" = "xyes" ; then
+ ac_save_CFLAGS="$CFLAGS"
+ ac_save_CXXFLAGS="$CXXFLAGS"
+ ac_save_LIBS="$LIBS"
+ CFLAGS="$CFLAGS $SDL_CFLAGS"
+ CXXFLAGS="$CXXFLAGS $SDL_CFLAGS"
+ LIBS="$LIBS $SDL_LIBS"
+dnl
+dnl Now check if the installed SDL is sufficiently new. (Also sanity
+dnl checks the results of sdl-config to some extent
+dnl
+ rm -f conf.sdltest
+ AC_RUN_IFELSE([AC_LANG_SOURCE([[
+#include <stdio.h>
+#include <stdlib.h>
+#include "SDL.h"
+
+int main (int argc, char *argv[])
+{
+ int major, minor, micro;
+ FILE *fp = fopen("conf.sdltest", "w");
+
+ if (fp) fclose(fp);
+
+ if (sscanf("$min_sdl_version", "%d.%d.%d", &major, &minor, µ) != 3) {
+ printf("%s, bad version string\n", "$min_sdl_version");
+ exit(1);
+ }
+
+ if (($sdl_major_version > major) ||
+ (($sdl_major_version == major) && ($sdl_minor_version > minor)) ||
+ (($sdl_major_version == major) && ($sdl_minor_version == minor) && ($sdl_micro_version >= micro)))
+ {
+ return 0;
+ }
+ else
+ {
+ printf("\n*** 'sdl-config --version' returned %d.%d.%d, but the minimum version\n", $sdl_major_version, $sdl_minor_version, $sdl_micro_version);
+ printf("*** of SDL required is %d.%d.%d. If sdl-config is correct, then it is\n", major, minor, micro);
+ printf("*** best to upgrade to the required version.\n");
+ printf("*** If sdl-config was wrong, set the environment variable SDL_CONFIG\n");
+ printf("*** to point to the correct copy of sdl-config, and remove the file\n");
+ printf("*** config.cache before re-running configure\n");
+ return 1;
+ }
+}
+
+]])], [], [no_sdl=yes], [echo $ac_n "cross compiling; assumed OK... $ac_c"])
+ CFLAGS="$ac_save_CFLAGS"
+ CXXFLAGS="$ac_save_CXXFLAGS"
+ LIBS="$ac_save_LIBS"
+ fi
+ fi
+ if test "x$no_sdl" = x ; then
+ AC_MSG_RESULT(yes)
+ else
+ AC_MSG_RESULT(no)
+ fi
+ fi
+ if test "x$no_sdl" = x ; then
+ ifelse([$2], , :, [$2])
+ else
+ if test "$SDL_CONFIG" = "no" ; then
+ echo "*** The sdl-config script installed by SDL could not be found"
+ echo "*** If SDL was installed in PREFIX, make sure PREFIX/bin is in"
+ echo "*** your path, or set the SDL_CONFIG environment variable to the"
+ echo "*** full path to sdl-config."
+ else
+ if test -f conf.sdltest ; then
+ :
+ else
+ echo "*** Could not run SDL test program, checking why..."
+ CFLAGS="$CFLAGS $SDL_CFLAGS"
+ CXXFLAGS="$CXXFLAGS $SDL_CFLAGS"
+ LIBS="$LIBS $SDL_LIBS"
+ AC_LINK_IFELSE([AC_LANG_PROGRAM([[
+#include <stdio.h>
+#include "SDL.h"
+
+int main(int argc, char *argv[])
+{ return 0; }
+#undef main
+#define main K_and_R_C_main
+]], [[ return 0; ]])],
+ [ echo "*** The test program compiled, but did not run. This usually means"
+ echo "*** that the run-time linker is not finding SDL or finding the wrong"
+ echo "*** version of SDL. If it is not finding SDL, you'll need to set your"
+ echo "*** LD_LIBRARY_PATH environment variable, or edit /etc/ld.so.conf to point"
+ echo "*** to the installed location Also, make sure you have run ldconfig if that"
+ echo "*** is required on your system"
+ echo "***"
+ echo "*** If you have an old version installed, it is best to remove it, although"
+ echo "*** you may also be able to get things to work by modifying LD_LIBRARY_PATH"],
+ [ echo "*** The test program failed to compile or link. See the file config.log for the"
+ echo "*** exact error that occured. This usually means SDL was incorrectly installed"
+ echo "*** or that you have moved SDL since it was installed. In the latter case, you"
+ echo "*** may want to edit the sdl-config script: $SDL_CONFIG" ])
+ CFLAGS="$ac_save_CFLAGS"
+ CXXFLAGS="$ac_save_CXXFLAGS"
+ LIBS="$ac_save_LIBS"
+ fi
+ fi
+ SDL_CFLAGS=""
+ SDL_LIBS=""
+ ifelse([$3], , :, [$3])
+ fi
+ AC_SUBST(SDL_CFLAGS)
+ AC_SUBST(SDL_LIBS)
+ rm -f conf.sdltest
+])