workaround gcc4.x 'local static variable' guarding (hlds is single th…

…read so this is ok)

Makefile

@@ -8,15 +8,15 @@ ifeq ($(OSTYPE),win32)
 	CPP = /usr/bin/i586-mingw32msvc-gcc
 	AR = /usr/bin/i586-mingw32msvc-ar rc
 	RANLIB = /usr/bin/i586-mingw32msvc-ranlib
-	LINKFLAGS = -mdll -lwsock32 -lstdc++ -Xlinker --add-stdcall-alias -s
+	LINKFLAGS = -mdll -lwsock32 -Xlinker --add-stdcall-alias -s
 	DLLEND = .dll
 	ZLIB_OSFLAGS =
 else
 	CPP = gcc-4.2 -m32
 	AR = ar rc
 	RANLIB = ranlib
 	ARCHFLAG = -fPIC
-	LINKFLAGS = -fPIC -shared -ldl -lstdc++ -s
+	LINKFLAGS = -fPIC -shared -ldl -s
 	DLLEND = _i386.so
 	ZLIB_OSFLAGS = -DNO_UNDERLINE
 endif

h_export.cpp

@@ -37,3 +37,32 @@ void WINAPI GiveFnptrsToDll( enginefuncs_t* pengfuncsFromEngine, globalvars_t *p
    gpGlobals = pGlobals;
 }
 
+#ifdef __GNUC__
+/* workaround gcc4.x 'local static variable' guarding (hlds is single thread so this is ok) */
+namespace __cxxabiv1 
+{
+	/* guard variables */
+
+	/* The ABI requires a 64-bit type.  */
+	__extension__ typedef int __guard __attribute__((mode (__DI__)));
+
+	extern "C" int __cxa_guard_acquire (__guard *);
+	extern "C" void __cxa_guard_release (__guard *);
+	extern "C" void __cxa_guard_abort (__guard *);
+
+	extern "C" int __cxa_guard_acquire (__guard *g) 
+	{
+		return !*(char *)(g);
+	}
+
+	extern "C" void __cxa_guard_release (__guard *g)
+	{
+		*(char *)g = 1;
+	}
+
+	extern "C" void __cxa_guard_abort (__guard *)
+	{
+	}
+}
+#endif
+