• Matthijs Kooijman's avatar
    kbuild: Don't assume dts files live in arch/*/boot/dts · ad061568
    Matthijs Kooijman authored
    In commit b40b25ff (kbuild: always run gcc -E on *.dts, remove cmd_dtc_cpp),
    dts building was changed to always use the C preprocessor. This meant
    that the .dts file passed to dtc is not the original, but the
    preprocessed one.
    
    When compiling with a separate build directory (i.e., with O=), this
    preprocessed file will not live in the same directory as the original.
    When the .dts file includes .dtsi files, dtc will look for them in the
    build directory, not in the source directory and compilation will fail.
    
    The commit referenced above tried to fix this by passing arch/*/boot/dts
    as an include path to dtc. However, for mips, the .dts files are not in
    this directory, so dts compilation on mips breaks for some targets.
    
    Instead of hardcoding this particular include path, this commit just
    uses the directory of the .dts file that is being compiled, which
    effectively restores the previous behaviour wrt includes. For most .dts
    files, this path is just the same as the previous hardcoded
    arch/*/boot/dts path.
    
    This was tested on a mips (rt3052) and an arm (bcm2835) target.
    Signed-off-by: default avatarMatthijs Kooijman <matthijs@stdin.nl>
    Reviewed-by: default avatarStephen Warren <swarren@nvidia.com>
    Signed-off-by: default avatarMichal Marek <mmarek@suse.cz>
    ad061568
Makefile.lib 13.2 KB