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kbuild: userprogs: use correct linker when mixing clang and GNU ld

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commit 936599ca514973d44a766b7376c6bbdc96b6a8cc upstream.

The userprogs infrastructure does not expect clang being used with GNU ld
and in that case uses /usr/bin/ld for linking, not the configured $(LD).
This fallback is problematic as it will break when cross-compiling.
Mixing clang and GNU ld is used for example when building for SPARC64,
as ld.lld is not sufficient; see Documentation/kbuild/llvm.rst.

Relax the check around --ld-path so it gets used for all linkers.

Fixes: dfc1b168a8c4 ("kbuild: userprogs: use correct lld when linking through clang")
Cc: stable@vger.kernel.org
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
[nathan: Work around wrapping '--ld-path' in cc-option in older stable
         branches due to older minimum LLVM version]
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Thomas Weißschuh
2025-08-21 11:31:06 -07:00
committed by Greg Kroah-Hartman
parent cf3ad6aa10
commit 244ddfdaab
1 changed files with 1 additions and 1 deletions
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Makefile
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@@ -1037,7 +1037,7 @@ KBUILD_USERCFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CPPFLAGS) $(KBUILD
KBUILD_USERLDFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS))
# userspace programs are linked via the compiler, use the correct linker
ifeq ($(CONFIG_CC_IS_CLANG)$(CONFIG_LD_IS_LLD),yy)
ifdef CONFIG_CC_IS_CLANG
KBUILD_USERLDFLAGS += $(call cc-option, --ld-path=$(LD))
endif