# git rev-parse -q --verify ab6aaea6835b5d6da15f4d14d4af8b1a9a1c609b^{commit}
ab6aaea6835b5d6da15f4d14d4af8b1a9a1c609b
already have revision, skipping fetch
# git checkout -q -f -B kisskb ab6aaea6835b5d6da15f4d14d4af8b1a9a1c609b
# git clean -qxdf
# < git log -1
# commit ab6aaea6835b5d6da15f4d14d4af8b1a9a1c609b
# Author: Masahiro Yamada <masahiroy@kernel.org>
# Date:   Thu Jul 4 22:13:58 2024 +0900
# 
#     kbuild: avoid build error when single DTB is turned into composite DTB
#     
#     As commit afa974b77128 ("kbuild: add real-prereqs shorthand for
#     $(filter-out FORCE,$^)") explained, $(real-prereqs) is not just a list
#     of objects when linking a multi-object module. If a single-object module
#     is turned into a multi-object module, $^ (and therefore $(real-prereqs)
#     as well) contains header files recorded in the *.cmd file. Such headers
#     must be filtered out.
#     
#     Now that a DTB can be built either from a single source or multiple
#     source files, the same issue can occur.
#     
#     Consider the following scenario:
#     
#     First, foo.dtb is implemented as a single-blob device tree.
#     
#     The code looks something like this:
#     
#     [Sample Code 1]
#     
#       Makefile:
#     
#           dtb-y += foo.dtb
#     
#       foo.dts:
#     
#         #include <dt-bindings/gpio/gpio.h>
#         /dts-v1/;
#         / { };
#     
#     When it is compiled, .foo.dtb.cmd records that foo.dtb depends on
#     scripts/dtc/include-prefixes/dt-bindings/gpio/gpio.h.
#     
#     Later, foo.dtb is split into a base and an overlay. The code looks
#     something like this:
#     
#     [Sample Code 2]
#     
#       Makefile:
#     
#           dtb-y += foo.dtb
#           foo-dtbs := foo-base.dtb foo-addon.dtbo
#     
#       foo-base.dts:
#     
#         #include <dt-bindings/gpio/gpio.h>
#         /dts-v1/;
#         / { };
#     
#       foo-addon.dtso:
#     
#         /dts-v1/;
#         /plugin/;
#         / { };
#     
#     If you rebuild foo.dtb without 'make clean', you will get this error:
#     
#         Overlay 'scripts/dtc/include-prefixes/dt-bindings/gpio/gpio.h' is incomplete
#     
#     $(real-prereqs) contains not only foo-base.dtb and foo-addon.dtbo but
#     also scripts/dtc/include-prefixes/dt-bindings/gpio/gpio.h, which is
#     passed to scripts/dtc/fdtoverlay.
#     
#     Fixes: 15d16d6dadf6 ("kbuild: Add generic rule to apply fdtoverlay")
#     Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
# < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version
# < git log --format=%s --max-count=1 ab6aaea6835b5d6da15f4d14d4af8b1a9a1c609b
# make -s -j 160 ARCH=powerpc O=/kisskb/build/kbuild_ppc64le_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  ppc64le_defconfig
Using /kisskb/src/arch/powerpc/configs/ppc64_defconfig as base
Merging /kisskb/src/arch/powerpc/configs/le.config
#
# merged configuration written to .config (needs make)
#
# < make -s -j 160 ARCH=powerpc O=/kisskb/build/kbuild_ppc64le_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  help
# make -s -j 160 ARCH=powerpc O=/kisskb/build/kbuild_ppc64le_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  olddefconfig
# make -s -j 160 ARCH=powerpc O=/kisskb/build/kbuild_ppc64le_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
Completed OK
# rm -rf /kisskb/build/kbuild_ppc64le_defconfig_powerpc-gcc5
# Build took: 0:02:13.903122