On Wed, 11 Dec 2002 18:20:30 +0100 (MET), "Maciej W. Rozycki" <macro@ds2.pg.gda.pl> wrote: >On Wed, 11 Dec 2002, Jun Sun wrote: > >> > > This is because arch/mips/lib/Makefile says: >> > > >> > > obj-$(CONFIG_IDE) += ide-std.o ide-no.o >> > [...] >> > > 3) use some smart trick in Makefile so that we include those >> > > two files only if CONFIG_IDE is 'y' or 'm'. (How?) >> > >> > obj-$(CONFIG_IDE_MODULE) >> >> This does not work. Apparently, CONFIG_IDE_MODULE is not created >> for makefile part. > > Indeed -- my fault. Variables such as $(CONFIG_IDE) are four-state and >for the module case they are simply set to "m". But then you can use >"ifeq ($(CONFIG_IDE),m)". Another approach is to invent an additional >variable automatically set to "y" whenever CONFIG_IDE is enabled. obj-$(subst m,y,$(CONFIG_IDE)) += ide-std.o ide-no.o ide-std.o ide-no.o are built in if CONFIG_IDE is m or y.
