linux-next/arch/powerpc
Masahiro Yamada b1992c3772 kbuild: use $(src) instead of $(srctree)/$(src) for source directory
Kbuild conventionally uses $(obj)/ for generated files, and $(src)/ for
checked-in source files. It is merely a convention without any functional
difference. In fact, $(obj) and $(src) are exactly the same, as defined
in scripts/Makefile.build:

    src := $(obj)

When the kernel is built in a separate output directory, $(src) does
not accurately reflect the source directory location. While Kbuild
resolves this discrepancy by specifying VPATH=$(srctree) to search for
source files, it does not cover all cases. For example, when adding a
header search path for local headers, -I$(srctree)/$(src) is typically
passed to the compiler.

This introduces inconsistency between upstream and downstream Makefiles
because $(src) is used instead of $(srctree)/$(src) for the latter.

To address this inconsistency, this commit changes the semantics of
$(src) so that it always points to the directory in the source tree.

Going forward, the variables used in Makefiles will have the following
meanings:

  $(obj)     - directory in the object tree
  $(src)     - directory in the source tree  (changed by this commit)
  $(objtree) - the top of the kernel object tree
  $(srctree) - the top of the kernel source tree

Consequently, $(srctree)/$(src) in upstream Makefiles need to be replaced
with $(src).

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
2024-05-10 04:34:52 +09:00
..
boot kbuild: use $(src) instead of $(srctree)/$(src) for source directory 2024-05-10 04:34:52 +09:00
configs powerpc: Add allmodconfig for all 32-bit sub-arches 2024-03-03 22:20:29 +11:00
crypto powerpc/crypto/chacha-p10: Fix failure on non Power10 2024-04-05 00:02:18 +11:00
include vdso: Use CONFIG_PAGE_SHIFT in vdso/datapage.h 2024-04-03 21:50:04 +02:00
kernel kbuild: use $(src) instead of $(srctree)/$(src) for source directory 2024-05-10 04:34:52 +09:00
kexec powerpc/kdump: Split KEXEC_CORE and CRASH_DUMP dependency 2024-03-17 13:34:00 +11:00
kvm powerpc updates for 6.9 2024-03-15 17:53:48 -07:00
lib powerpc: xor_vmx: Add '-mhard-float' to CFLAGS 2024-03-07 00:13:28 +11:00
math-emu powerpc/math-emu: Inhibit W=1 warnings 2022-09-08 11:11:18 +10:00
mm powerpc: Handle error in mark_rodata_ro() and mark_initmem_nx() 2024-03-17 13:33:21 +11:00
net powerpc/bpf: use bpf_jit_binary_pack_[alloc|finalize|free] 2023-10-23 20:33:19 +11:00
perf powerpc/hv-gpci: Fix the H_GET_PERF_COUNTER_INFO hcall return value checks 2024-03-03 23:05:21 +11:00
platforms powerpc/kdump: Split KEXEC_CORE and CRASH_DUMP dependency 2024-03-17 13:34:00 +11:00
purgatory powerpc/purgatory: remove PGO flags 2023-06-12 11:31:50 -07:00
sysdev powerpc updates for 6.9 2024-03-15 17:53:48 -07:00
tools powerpc/tools: Pass -mabi=elfv2 to gcc-check-mprofile-kernel.sh 2023-10-20 17:46:33 +11:00
xmon powerpc updates for 6.9 2024-03-15 17:53:48 -07:00
Kbuild kbuild: use more subdir- for visiting subdirectories while cleaning 2021-10-24 13:49:46 +09:00
Kconfig powerpc/kdump: Split KEXEC_CORE and CRASH_DUMP dependency 2024-03-17 13:34:00 +11:00
Kconfig.debug powerpc/ps3: move udbg_shutdown_ps3gelic prototype 2023-11-21 12:06:50 +11:00
Makefile powerpc updates for 6.9 2024-03-15 17:53:48 -07:00
Makefile.postlink kbuild: remove ARCH_POSTLINK from module builds 2023-10-28 21:10:08 +09:00