dosbox-sdl2: fix build with SDL 2.x

The configure script checks for SDL 2, but the test program run afterwards checks only for 2.0.x. Removed the check to allow compilation with any SDL2 version.

Author: cmitu

scriptmodules/emulators/dosbox-sdl2.sh

@@ -27,6 +27,8 @@ function sources_dosbox-sdl2() {
     # use custom config filename & path to allow coexistence with regular dosbox
     sed -i "src/misc/cross.cpp" -e 's/~\/.dosbox/~\/.'$md_id'/g' \
        -e 's/DEFAULT_CONFIG_FILE "dosbox-"/DEFAULT_CONFIG_FILE "'$md_id'-"/g'
+    # patch the SDL2 detection to remove the strict 2.0.x version check
+    applyPatch "$md_data/001-sd2.0-check-remove.diff"
 }
 
 function build_dosbox-sdl2() {

scriptmodules/emulators/dosbox-sdl2/001-sd2.0-check-remove.diff

@@ -0,0 +1,25 @@
+diff --git a/configure.ac b/configure.ac
+index 407d553..731d960 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -31,20 +31,6 @@ EXULT_CHECK_SDL(:,AC_MSG_ERROR([[*** SDL not found!]]))
+ LIBS="$LIBS $SDL_LIBS"
+ CPPFLAGS="$CPPFLAGS $SDL_CFLAGS"
+ 
+-dnl Check if SDL is 2.0.x
+-AC_MSG_CHECKING([for SDL version being 2.0.x])
+-AC_COMPILE_IFELSE([AC_LANG_SOURCE([
+-#include "SDL.h"
+-void blah(){
+-#if !((SDL_MAJOR_VERSION == 2) && (SDL_MINOR_VERSION == 0))
+-#error "Only SDL 2.0 supported"
+-#endif
+-;
+-}
+-])],AC_MSG_RESULT([yes]),[
+- AC_MSG_RESULT([no]) 
+- AC_MSG_ERROR([Only libSDL 2.0.x supported])])
+-
+ dnl Checks for header files.
+ 
+ dnl Checks for typedefs, structures, and compiler characteristics.