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    SubjectRe: [PATCH] [Repost without wordwrapping] Merge m68k and m68knommu
    On Wednesday 18 November 2009 01:32:25 Geert Uytterhoeven wrote:

    > > The patch modifies the toplevel Makefile so that ARCH=m68knommu still
    > > works (by setting SRCARCH=m68k) and adds the m68knommu Kconfig and
    > > Makefile to the m68k Kconfig and Makefile, using the definition of ARCH
    > > to select which values to use.
    > (still dreaming of my pet Amiga-nommu project) I prefer to use
    > CONFIG_MMU as the selector...

    CONFIG_MMU is used as the selector elsewhere, but for Kconfig and the
    Makefiles something else was needed.
    > > Thus when building for either a m68k or an m68knommu target, one still
    > > specifies either ARCH=m68k or ARCH=m68knommu and everything should
    > > build EXACTLY as it did pre-merge.  (I think).
    > ... using CONFIG_MMU would change this?

    Yes; originally I tried using CONFIG_MMU to choose between the mmu and nommu
    portions of the Kconfig and Makefile, but that broke the defconfigs. Rather
    than patch the defconfigs or make a more elaborate patch for the Kconfig, for
    this initial patch I wanted to keep it as simple and as un-invasive as
    possible so that it would be trivial (?) to verify the merged kernel tree
    produces a kernel that is the same as the pre-merged kernel tree, thus
    providing a baseline for bisecting any problems with the subsequent patches
    that do the real merging of the individual files. A later patch will do a
    better job of merging the Kconfigs and Makefiles. Then you'd be able to have
    your Amiga-nommu and I can have my Coldfire 5484 either as mmu or nommu...

    Steven King -- sfking at fdwdc dot com

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