This is useful if anything is ever put into $(EXTRACFLAGS) (e.g. I'm
currently experimenting with optionally putting $(CXX_FLAG) into it for a
C++ build), and is already done in the VC case (here, and in
win32/Makefile).
.ENDIF
EXTRACFLAGS =
-CFLAGS = $(INCLUDES) $(DEFINES) $(LOCDEFS) $(OPTIMIZE)
+CFLAGS = $(EXTRACFLAGS) $(INCLUDES) $(DEFINES) $(LOCDEFS) $(OPTIMIZE)
LINK_FLAGS = $(LINK_DBG) -L"$(INST_COREDIR)" -L"$(CCLIBDIR)"
OBJOUT_FLAG = -o
EXEOUT_FLAG = -o