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s390: don't allow CONFIG_COMPAT with LD=ld.lld

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When building 'ARCH=s390 defconfig compat.config' with GCC and
LD=ld.lld, there is an error when attempting to link the compat vDSO:

  ld.lld: error: unknown emulation: elf_s390
  make[4]: *** [arch/s390/kernel/vdso32/Makefile:48: arch/s390/kernel/vdso32/vdso32.so.dbg] Error 1

Much like clang, ld.lld only supports the 64-bit s390 emulation. Add a
dependency on not using LLD to CONFIG_COMPAT to avoid breaking the build
with this toolchain combination.

Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Link: https://lore.kernel.org/r/20240214-s390-compat-lld-dep-v1-1-abf1f4b5e514@kernel.org
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
This commit is contained in:
Nathan Chancellor
2024-02-14 15:53:48 -07:00
committed by Heiko Carstens
parent 616c4ea9bc
commit b20ea29a70
1 changed files with 1 additions and 1 deletions
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arch/s390/Kconfig
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@@ -449,7 +449,7 @@ config COMPAT
select COMPAT_OLD_SIGACTION
select HAVE_UID16
depends on MULTIUSER
depends on !CC_IS_CLANG
depends on !CC_IS_CLANG && !LD_IS_LLD
help
Select this option if you want to enable your system kernel to
handle system-calls from ELF binaries for 31 bit ESA. This option