powerpc leopard support

This adds the target 'PPC_OSX_BUILD' and makes some slight modifications to allow the MacPorts GCC 4.9 compiler to compile this project. However, you will need to use this modified SDL2 2.0.6 to link against:

https://github.com/alex-free/tiger_sdl2.0.6

The above SDL should be compiled with an original Apple compiler:

sudo port select --set gcc gcc40

SM64ex should be compiled with the MacPorts GCC 4.9:

sudo port select --set gcc mp-gcc49

Besides that, using MacPorts to get all the normal Mac OS X dependencies is all that's required. GCC 4.9 can take days to compile, to jump start the proccess you can use my binary installer at:

https://macintoshgarden.org/apps/gcc-mp-49

Everything is working well, except sound is a bit distorted. It gets more distorted when more samples/audio are played at once, I can't figure this out yet, any help would be appreciated.

Makefile

@@ -30,6 +30,9 @@ TARGET_WEB ?= 0
 # Makeflag to enable OSX fixes
 OSX_BUILD ?= 0
 
+# Makeflag to enable PowerPC OSX fixes
+PPC_OSX_BUILD ?= 0
+
 # Specify the target you are building for, TARGET_BITS=0 means native
 TARGET_ARCH ?= native
 TARGET_BITS ?= 0
@@ -203,7 +206,7 @@ ifeq ($(TARGET_RPI),1) # Define RPi to change SDL2 title & GLES2 hints
       VERSION_CFLAGS += -DUSE_GLES
 endif
 
-ifeq ($(OSX_BUILD),1) # Modify GFX & SDL2 for OSX GL
+ifeq (,$(filter 1,$(OSX_BUILD)$(PPC_OSX_BUILD))) # Modify GFX & SDL2 for OSX GL
      VERSION_CFLAGS += -DOSX_BUILD
 endif
 
@@ -224,6 +227,11 @@ ifneq (,$(filter $(RENDER_API),D3D11 D3D12))
     $(warning DirectX renderers require DXGI, forcing WINDOW_API value)
     WINDOW_API := DXGI
   endif
+else ifeq ($(PPC_OSX_BUILD),1)
+	ifneq ($(RENDER_API),GL_LEGACY)
+    $(warning PowerPC OS X should use the GL_LEGACY RENDER_API, forcing GL_LEGACY value)
+	RENDER_API := GL_LEGACY
+  endif
 else
   ifeq ($(WINDOW_API),DXGI)
     $(error DXGI can only be used with DirectX renderers)
@@ -496,7 +504,7 @@ ENDIAN_BITWIDTH := $(BUILD_DIR)/endian-and-bitwidth
 
 AS := $(CROSS)as
 
-ifeq ($(OSX_BUILD),1)
+ifeq (,$(filter 1,$(OSX_BUILD)$(PPC_OSX_BUILD)))
 AS := i686-w64-mingw32-as
 endif
 
@@ -530,6 +538,10 @@ else ifeq ($(OSX_BUILD),1)
   CPP := cpp-9 -P
   OBJDUMP := i686-w64-mingw32-objdump
   OBJCOPY := i686-w64-mingw32-objcopy
+else ifeq ($(PPC_OSX_BUILD),1)
+  CPP := cpp -P
+  OBJDUMP := i686-w64-mingw32-objdump
+  OBJCOPY := i686-w64-mingw32-objcopy
 else # Linux & other builds
   CPP := $(CROSS)cpp -P
   OBJCOPY := $(CROSS)objcopy
@@ -546,6 +558,10 @@ BACKEND_CFLAGS := -DRAPI_$(RENDER_API)=1 -DWAPI_$(WINDOW_API)=1 -DAAPI_$(AUDIO_A
 BACKEND_CFLAGS += $(foreach capi,$(CONTROLLER_API),-DCAPI_$(capi)=1)
 BACKEND_LDFLAGS :=
 SDL2_USED := 0
+# GCC 4.9 needs this set explicitly
+ifeq ($(PPC_OSX_BUILD),1)
+  BACKEND_CFLAGS += -std=c11
+endif
 
 # for now, it's either SDL+GL or DXGI+DirectX, so choose based on WAPI
 ifeq ($(WINDOW_API),DXGI)
@@ -558,12 +574,13 @@ ifeq ($(WINDOW_API),DXGI)
   endif
   BACKEND_LDFLAGS += -ld3dcompiler -ldxgi -ldxguid
   BACKEND_LDFLAGS += -lsetupapi -ldinput8 -luser32 -lgdi32 -limm32 -lole32 -loleaut32 -lshell32 -lwinmm -lversion -luuid -static
+# This isn't actually searched for includes on Leopard, and sdl-config is one directory too deep
 else ifeq ($(WINDOW_API),SDL2)
   ifeq ($(WINDOWS_BUILD),1)
     BACKEND_LDFLAGS += -lglew32 -lglu32 -lopengl32
   else ifeq ($(TARGET_RPI),1)
     BACKEND_LDFLAGS += -lGLESv2
-  else ifeq ($(OSX_BUILD),1)
+  else ifeq (,$(filter 1,$(OSX_BUILD)$(PPC_OSX_BUILD)))
     BACKEND_LDFLAGS += -framework OpenGL `pkg-config --libs glew`
   else
     BACKEND_LDFLAGS += -lGL
@@ -581,7 +598,7 @@ endif
 
 # SDL can be used by different systems, so we consolidate all of that shit into this
 ifeq ($(SDL_USED),2)
-  BACKEND_CFLAGS += -DHAVE_SDL2=1 `$(SDLCONFIG) --cflags`
+  BACKEND_CFLAGS += -DHAVE_SDL2=1 `$(SDLCONFIG) --cflags` -I/usr/local/include
   ifeq ($(WINDOWS_BUILD),1)
     BACKEND_LDFLAGS += `$(SDLCONFIG) --static-libs` -lsetupapi -luser32 -limm32 -lole32 -loleaut32 -lshell32 -lwinmm -lversion
   else
@@ -688,7 +705,9 @@ else ifeq ($(TARGET_RPI),1)
 
 else ifeq ($(OSX_BUILD),1)
   LDFLAGS := -lm $(BACKEND_LDFLAGS) -no-pie -lpthread
-
+# Flag -no-pie not available in MacPorts GCC 4.9
+else ifeq ($(PPC_OSX_BUILD),1)
+  LDFLAGS := -lm $(BACKEND_LDFLAGS) -lpthread
 else
   LDFLAGS := $(BITS) -march=$(TARGET_ARCH) -lm $(BACKEND_LDFLAGS) -no-pie -lpthread
   ifeq ($(DISCORDRPC),1)

src/pc/controller/controller_sdl.c

@@ -2,7 +2,10 @@
 
 #include <stdio.h>
 #include <stdint.h>
+// stdbool.h can not be defined (and does not need to be defined) on the below platform
+#if !defined(__APPLE__) && !defined(__BIG_ENDIAN__) && !defined(__GNU__C)
 #include <stdbool.h>
+#endif
 #include <math.h>
 
 #include <SDL2/SDL.h>

src/pc/gfx/gfx_opengl_legacy.c

@@ -1,7 +1,10 @@
 #ifdef RAPI_GL_LEGACY
 
 #include <stdint.h>
+// stdbool.h can not be defined (and does not need to be defined) on the below platform
+#if !defined(__APPLE__) && !defined(__BIG_ENDIAN__) && !defined(__GNU__C)
 #include <stdbool.h>
+#endif
 #include <assert.h>
 
 #ifndef _LANGUAGE_C

tools/audiofile/audiofile.cpp

@@ -620,6 +620,8 @@ extern "C" {
 #define __attribute__(x)
 #endif
 
+extern long long int llrint ( double x );
+
 void _af_error (int errorCode, const char *fmt, ...)
 	__attribute__((format(printf, 2, 3)));
 
@@ -5075,7 +5077,7 @@ bool ModuleState::fileModuleHandlesSeeking() const
 
 status ModuleState::setup(AFfilehandle file, Track *track)
 {
-	AFframecount fframepos = std::llrint(track->nextvframe * track->f.sampleRate / track->v.sampleRate);
+	AFframecount fframepos = llrint(track->nextvframe * track->f.sampleRate / track->v.sampleRate);
 	bool isReading = file->m_access == _AF_READ_ACCESS;
 
 	if (!track->v.isUncompressed())
@@ -5146,11 +5148,11 @@ status ModuleState::setup(AFfilehandle file, Track *track)
 		if (track->totalfframes == -1)
 			track->totalvframes = -1;
 		else
-			track->totalvframes = std::llrint(track->totalfframes *
+			track->totalvframes = llrint(track->totalfframes *
 				(track->v.sampleRate / track->f.sampleRate));
 
 		track->nextfframe = fframepos;
-		track->nextvframe = std::llrint(fframepos * track->v.sampleRate / track->f.sampleRate);
+		track->nextvframe = llrint(fframepos * track->v.sampleRate / track->f.sampleRate);
 
 		m_isDirty = false;