SourceMod can now be somewhat compiled on OS X for patch sanity testing (bug 3516, r=ds).

This adds the ability for us to change the GCC version we use more flexibly.

loader/Makefile

@@ -19,9 +19,9 @@ C_OPT_FLAGS = -DNDEBUG -O3 -funroll-loops -pipe -fno-strict-aliasing
 C_DEBUG_FLAGS = -D_DEBUG -DDEBUG -g -ggdb3
 C_GCC4_FLAGS = -fvisibility=hidden
 CPP_GCC4_FLAGS = -fvisibility-inlines-hidden
-CPP = gcc-4.1
+CPP = gcc
 
-LINK = -static-libgcc
+LINK = -m32 -ldl -lm
 
 INCLUDE = -I$(MMSOURCE17)/core -I$(MMSOURCE17)/core/sourcehook
 
@@ -42,14 +42,21 @@ else
 	CFLAGS += $(C_OPT_FLAGS)
 endif
 
+OS := $(shell uname -s)
+ifeq "$(OS)" "Darwin"
+	LINK += -dynamiclib
+	BINARY = $(PROJECT).dylib
+else
+	LINK += -static-libgcc -shared
+	BINARY = $(PROJECT)_i486.so
+endif
+
 GCC_VERSION := $(shell $(CPP) -dumpversion >&1 | cut -b1)
 ifeq "$(GCC_VERSION)" "4"
 	CFLAGS += $(C_GCC4_FLAGS)
 	CPPFLAGS += $(CPP_GCC4_FLAGS)
 endif
 
-BINARY = $(PROJECT)_i486.so
-
 OBJ_LINUX := $(OBJECTS:%.cpp=$(BIN_DIR)/%.o)
 
 $(BIN_DIR)/%.o: %.cpp
@@ -60,7 +67,7 @@ all:
 	$(MAKE) -f Makefile loader
 
 loader: $(OBJ_LINUX)
-	$(CPP) $(INCLUDE) $(OBJ_LINUX) $(LINK) -m32 -shared -ldl -lm -o$(BIN_DIR)/$(BINARY)
+	$(CPP) $(INCLUDE) $(OBJ_LINUX) $(LINK) -o $(BIN_DIR)/$(BINARY)
 
 debug:
 	$(MAKE) -f Makefile all DEBUG=true

loader/loader.cpp

@@ -33,7 +33,7 @@
 #include <stdarg.h>
 #include <string.h>
 #include <stdio.h>
-#include <malloc.h>
+#include <stdlib.h>
 
 #if defined _MSC_VER
 	#define DLL_EXPORT				extern "C" __declspec(dllexport)
@@ -119,7 +119,7 @@ METAMOD_PLUGIN *_GetPluginPtr(const char *path, int fail_api)
 
 	if (!(g_hCore=openlib(path)))
 	{
-#if defined __linux__
+#if defined __linux__ || defined __APPLE__
 		UTIL_Format(s_FailPlugin.error_buffer, 
 			sizeof(s_FailPlugin.error_buffer),
 			"%s",
@@ -289,7 +289,7 @@ __attribute__((destructor)) static void gcc_fini()
 #endif
 
 /* Overload a few things to prevent libstdc++ linking */
-#if defined __linux__
+#if defined __linux__ || defined __APPLE__
 extern "C" void __cxa_pure_virtual(void)
 {
 }