GLEW: Define static + enabled and includes via SCons

This allows us not to have to hack our definitions in the upstream files,
making it easier to upgrade to newer versions in the future.

For the include paths to work, the headers are moved to a GL subfolder to
match their upstream location.

(cherry picked from commit 768e9252714b57421b5c893a8258469a14630a30)

context_gl_haiku.cpp

@@ -38,6 +38,6 @@ int ContextGL_Haiku::get_window_width() {
 
 int ContextGL_Haiku::get_window_height() {
 	return window->Bounds().IntegerHeight();
-} 
+}
 
 #endif

context_gl_haiku.h

@@ -18,8 +18,8 @@ public:
 	~ContextGL_Haiku();
 
 	virtual Error initialize();
-	virtual void release_current();	
+	virtual void release_current();
-	virtual void make_current();	
+	virtual void make_current();
 	virtual void swap_buffers();
 	virtual int get_window_width();
 	virtual int get_window_height();

detect.py

@@ -23,7 +23,8 @@ def get_opts():
 
 def get_flags():
 	return [
-		('builtin_zlib', 'no')
+		('builtin_zlib', 'no'),
+		#('glew', 'yes'), # TODO: investigate the GLEW situation on Haiku
 	]
 
 def configure(env):
@@ -52,9 +53,9 @@ def configure(env):
 
 	#env.Append(CCFLAGS=['-DFREETYPE_ENABLED'])
 	env.Append(CPPFLAGS = ['-DPTHREAD_NO_RENAME']) # TODO: enable when we have pthread_setname_np
-	env.Append(CPPFLAGS = ['-DGLEW_ENABLED', '-DOPENGL_ENABLED', '-DMEDIA_KIT_ENABLED'])
+	env.Append(CPPFLAGS = ['-DOPENGL_ENABLED', '-DMEDIA_KIT_ENABLED'])
 	env.Append(CPPFLAGS = ['-DUNIX_ENABLED', '-DGLES2_ENABLED', '-DGLES_OVER_GL'])
-	env.Append(LIBS = ['be', 'game', 'media', 'network', 'bnetapi', 'z', 'GL', 'GLEW'])
+	env.Append(LIBS = ['be', 'game', 'media', 'network', 'bnetapi', 'z', 'GL'])
 
 	import methods
 	env.Append(BUILDERS = {'GLSL120' : env.Builder(action = methods.build_legacygl_headers, suffix = 'glsl.h',src_suffix = '.glsl')})

godot_haiku.cpp

@@ -3,17 +3,17 @@
 
 int main(int argc, char* argv[]) {
 	OS_Haiku os;
-	
+
 	Error error = Main::setup(argv[0], argc-1, &argv[1]);
 	if (error != OK) {
 		return 255;
 	}
-	
+
 	if (Main::start()) {
 		os.run();
 	}
-	
+
 	Main::cleanup();
-	
+
 	return os.get_exit_code();
 }

key_mapping_haiku.cpp

@@ -70,7 +70,7 @@ static _HaikuTranslatePair _hb_to_keycode[] = {
 	{ KEY_INSERT, B_INSERT },
 	{ KEY_DELETE, B_DELETE },
 	// { KEY_HELP, ??? },
-	
+
 	{ KEY_0, (0x30) },
 	{ KEY_1, (0x31) },
 	{ KEY_2, (0x32) },

os_haiku.cpp

@@ -138,7 +138,7 @@ void OS_Haiku::finalize() {
 	memdelete(spatial_sound_2d_server);
 
 	memdelete(sample_manager);
-	
+
 	audio_server->finish();
 	memdelete(audio_server);