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.

public/sample_ext/Makefile

@@ -26,7 +26,7 @@ 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
 
 override ENGSET = false
 ifeq "$(ENGINE)" "original"
@@ -60,7 +60,7 @@ else
 	INCLUDE += -I. -I.. -Isdk -I$(SMSDK)/public -I$(SMSDK)/public/sourcepawn
 endif
 
-LINK += -static-libgcc
+LINK += -m32 -lm -ldl
 
 CFLAGS += -D_LINUX -Dstricmp=strcasecmp -D_stricmp=strcasecmp -D_strnicmp=strncasecmp -Dstrnicmp=strncasecmp \
 	-D_snprintf=snprintf -D_vsnprintf=vsnprintf -D_alloca=alloca -Dstrcmpi=strcasecmp -Wall -Werror -Wno-switch \
@@ -83,14 +83,21 @@ ifeq "$(USEMETA)" "true"
 	BIN_DIR := $(BIN_DIR).$(ENGINE)
 endif
 
+OS := $(shell uname -s)
+ifeq "$(OS)" "Darwin"
+	LINK += -dynamiclib
+	BINARY = $(PROJECT).ext.dylib
+else
+	LINK += -static-libgcc -shared
+	BINARY = $(PROJECT).ext.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).ext.so
-
 OBJ_LINUX := $(OBJECTS:%.cpp=$(BIN_DIR)/%.o)
 
 $(BIN_DIR)/%.o: %.cpp
@@ -111,7 +118,7 @@ check:
 	fi
 
 extension: check $(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