Index: makefiles/src/subdir.mk
--- makefiles/src/subdir.mk.orig
+++ makefiles/src/subdir.mk
@@ -71,7 +71,7 @@ CPP_DEPS += \
 src/%.o: ../src/%.cpp
 	@echo 'Building file: $<'
 	@echo 'Invoking: GCC C++ Compiler'
-	g++ -O3 -ffast-math -Wall -c -fmessage-length=0 `pkg-config --cflags gtk+-2.0 gthread-2.0;` -MMD -MP -MF"$(@:%.o=%.d)" -MT"$(@:%.o=%.d)" $(CXXFLAGS) $(CPPFLAGS) -o"$@" "$<"
+	${CXX} -Wall -c -fmessage-length=0 `pkg-config --cflags gtk+-2.0 gthread-2.0;` -MMD -MP -MF"$(@:%.o=%.d)" -MT"$(@:%.o=%.d)" $(CXXFLAGS) $(CPPFLAGS) -o"$@" "$<"
 	@echo 'Finished building: $<'
 	@echo ' '
 
