-e 's|@''REPLACE_ROUNDF''@|$(REPLACE_ROUNDF)|g' \
-e 's|@''REPLACE_ROUNDL''@|$(REPLACE_ROUNDL)|g' \
-e 's|@''REPLACE_SIGNBIT''@|$(REPLACE_SIGNBIT)|g' \
+ -e 's|@''REPLACE_SIGNBIT_USING_GCC''@|$(REPLACE_SIGNBIT_USING_GCC)|g' \
-e '/definition of GL_LINK_WARNING/r $(LINK_WARNING_H)' \
< $(srcdir)/math.in.h; \
} > $@-t