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    SubjectRe: [Patch 2/8] MIPS: Remove 'TOPDIR' from Makefiles
    On Tue, Jan 01, 2008 at 02:44:48PM +0100, Andreas Schwab wrote:
    > Sam Ravnborg <sam@ravnborg.org> writes:
    >
    > >> @@ -24,7 +24,7 @@ HEAD_DEFINES := -D_kernel_start=0x$(KERNEL_START) \
    > >> -D TIMESTAMP=$(shell date +%s)
    > >>
    > >> $(obj)/head.o: $(obj)/head.S $(KERNEL_IMAGE)
    > >> - $(CC) -fno-pic $(HEAD_DEFINES) -I$(TOPDIR)/include -c -o $@ $<
    > >> + $(CC) -fno-pic $(HEAD_DEFINES) -I$(objtree)/include -c -o $@ $<
    > > This has never worked with O=.. builds.
    > > The correct fix here is to use:
    > >> + $(CC) -fno-pic $(HEAD_DEFINES) -Iinclude -Iinclude2 -c -o $@ $<
    > >
    > > The -Iinclude2 is only for O=... builds so to keep current
    > > behaviour removing $(TOPDIR)/ would do it.
    >
    > Shouldn't that use $(LINUXINCLUDE), or $(KBUILD_CPPFLAGS)?
    It would be better to use $(LINUXINCLUDE) as we then pull in all config
    symbols too and do not have to hardcode kbuild internal names (include2).

    As for the use of KBUILD_CPPFLAGS at present the usage is not consistent
    across the architectures. Why does arm for example say:
    KBUILD_CPPFLAGS += -mbig-endian

    This looks like a KBUILD_CFLAGS thing to me.

    So we should preferably stick with LINUXINCLUDE for now.

    Sam


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