[ox/std] Add gcc library as dependency when building with GCC

deps/ox/src/ox/std/CMakeLists.txt

@@ -1,6 +1,5 @@
 add_library(
 	OxStd
-		arith.cpp
 		assert.cpp
 		buildinfo.cpp
 		byteswap.cpp
@@ -19,6 +18,11 @@ set_property(
 		POSITION_INDEPENDENT_CODE ON
 )
 
+target_link_libraries(
+	OxStd PUBLIC
+		$<$<CXX_COMPILER_ID:GNU>:gcc>
+)
+
 install(
 	FILES
 		assert.hpp