wire up sdl_image in the build stuff

Author: ohsix

StepmaniaCore.cmake

@@ -258,6 +258,10 @@ endif()
 
 if(WITH_SDL)
   find_package(SDL2 REQUIRED)
+  find_package(PkgConfig REQUIRED)
+
+  #IMG_SaveJPG was added in 2.0.2, SavePNG was added 2.0.0
+  pkg_check_modules(SDL2_image REQUIRED SDL2_image>=2.0.2)
   set(HAS_SDL TRUE)
 endif()
 

src/CMakeLists.txt

@@ -626,6 +626,9 @@ else() # Unix / Linux TODO: Remember to find and locate the zip archive files.
 
   if(SDL2_FOUND)
     list(APPEND SMDATA_LINK_LIB ${SDL2_LIBRARIES})
+    list(APPEND SMDATA_LINK_LIB ${SDL2_image_LIBRARIES})
+    list(APPEND SM_INCLUDE_DIRS ${SDL2_INCLUDE_DIRS})
+    list(APPEND SM_INCLUDE_DIRS ${SDL2_image_INCLUDE_DIRS})
     sm_add_compile_definition("${SM_EXE_NAME}" HAVE_SDL)
   endif()