Use find_package for SDL libraries

CMake already distributes FindSDL*.cmake files for SDL and SDL_mixer,
which support custom prefixes via environment variables, removing the
need for ad-hoc logic in Win9x builds.

Also, according to FindSDL.cmake, #include <SDL.h> is the preferred way
for portability reasons, instead of #include <SDL/SDL.h>, which is the
option that has been used so far.

1 files changed, 15 insertions, 0 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 37a6a94..f6f4fab 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -14,11 +14,26 @@ if(CMAKE_TOOLCHAIN_FILE MATCHES "ps1")
     set(PS1_BUILD 1)
 elseif(CMAKE_TOOLCHAIN_FILE MATCHES "win9x")
     set(WIN9X_BUILD 1)
+    set(SDL1_2_BUILD 1)
 else()
     set(HOST_BUILD 1)
+    set(SDL1_2_BUILD 1)
 endif()
 
 add_executable(${PROJECT_NAME} "src/main.c")
+
+if(SDL1_2_BUILD)
+    find_package(SDL 1.2 REQUIRED)
+    find_package(SDL_gfx 2.0 REQUIRED)
+    find_package(SDL_mixer 1.2 REQUIRED)
+    # FindSDL_mixer.cmake does not export any target, so do it here instead.
+    add_library(SDL::SDL_mixer STATIC IMPORTED)
+    set_property(TARGET SDL::SDL_mixer PROPERTY
+        IMPORTED_LOCATION ${SDL_MIXER_LIBRARIES})
+    target_include_directories(SDL::SDL_mixer INTERFACE ${SDL_MIXER_INCLUDE_DIRS})
+    target_link_libraries(SDL::SDL_mixer INTERFACE SDL::SDL)
+endif()
+
 set(cdroot ${CMAKE_BINARY_DIR}/cdimg)
 file(MAKE_DIRECTORY ${cdroot})
 # Avoid C11 since it is not supported by the i386-mingw32 toolchain.