Add SDL from Homebrew package manager on macOS

README.md

@@ -22,7 +22,7 @@ able to use the library however they wish without restrictions.
 
 There are a number of variables which can be set to control the compilation:
 
-* SDL_PLATFORM = Can be set to one of the following values: linux, windows, macosx, ios or android
+* SDL_PLATFORM = Can be set to one of the following values: linux, windows, macosx, macos_homebrew, ios or android
 * SDL_MODE     = Can be one of: debug or release. Defaults to debug.
 
 ```

build/gnat/sdlada.gpr

@@ -1,12 +1,22 @@
 library project SDLAda is
-   type Platform_Type is ("linux", "bsd", "windows", "macosx", "ios", "android");
+   type Platform_Type is ("linux", "bsd", "windows", "macosx", "macos_homebrew", "ios", "android");
    type Mode_Type is ("debug", "release");
 
    Platform : Platform_Type := external ("SDL_PLATFORM", "linux");
    Mode     : Mode_Type     := external ("SDL_MODE", "debug");
+
+   Source_Platform := "";
+
+   case Platform is
+      when "macos_homebrew" =>
+         Source_Platform := "../../src/macosx";
+
+      when others =>
+         Source_Platform := "../../src/" & Platform;
+   end case;
 
    for Languages    use ("Ada", "C");
-   for Source_Dirs  use ("../../src", "../../src/" & Platform, "gen/src/",
+   for Source_Dirs  use ("../../src", Source_Platform, "gen/src/",
 
                          --  For SDL.Image.
                          "../../src/image",
@@ -37,6 +47,11 @@ library project SDLAda is
          when "linux" | "bsd" | "android" | "windows" =>
             C_Switches   := C_Switches & ("-I/usr/include/SDL2", "-D_REENTRANT");
 
+         when "macos_homebrew" =>
+            C_Switches   := C_Switches & ("-DSDL_HOMEBREW",
+                                          "-I/usr/local/include/SDL2",
+                                          "-D_REENTRANT");
+
          when others =>
             null;
       end case;

build/gnat/tests.gpr

@@ -15,4 +15,22 @@ project Tests is
                         "ttf.adb");
 
    package Compiler renames SDLAda.Compiler;
+
+   package Linker is
+
+      Linker_Switches := ();
+
+      case Sdlada.Platform is
+         when "macos_homebrew" =>
+            Linker_Switches := Linker_Switches & ("-lSDL2",
+                                                  "-lSDL2_ttf",
+                                                  "-lSDL2_image");
+         when others =>
+            null;
+      end case;
+
+      for Switches ("Ada") use Linker_Switches;
+
+   end Linker;
+
 end Tests;

src/image/version_images.c

@@ -20,7 +20,7 @@
  *    3. This notice may not be removed or altered from any source
  *    distribution.
  **********************************************************************************************************************/
-#ifdef __APPLE__
+#if defined(__APPLE__) && !defined (SDL_HOMEBREW)
 #include <SDL2_image/SDL_image.h>
 #else
 #include <SDL_image.h>

src/ttf/version_ttf.c

@@ -20,7 +20,7 @@
  *    3. This notice may not be removed or altered from any source
  *    distribution.
  **********************************************************************************************************************/
-#ifdef __APPLE__
+#if defined(__APPLE__) && !defined(SDL_HOMEBREW)
 #include <SDL2_ttf/SDL_ttf.h>
 #else
 #include <SDL_ttf.h>