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powerpc: Fix fatal warnings flag for LLVM's integrated assembler

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When building with LLVM_IAS=1, there is an error because
'-fatal-warnings' is not recognized as a valid flag:

  clang: error: unsupported argument '-fatal-warnings' to option '-Wa,'

Use the double hyphen version of the flag, '--fatal-warnings', which
works with both the GNU assembler and LLVM's integrated assembler.

Fixes: 608d4a5ca5 ("powerpc: Error on assembly warnings")
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Justin Stitt <justinstitt@google.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20240405-ppc-fix-wa-fatal-warnings-clang-v1-1-bdcd969f2ef0@kernel.org
This commit is contained in:
Nathan Chancellor 2024-04-05 12:31:22 -07:00 committed by Michael Ellerman
parent bfe51886ca
commit 8884fc918f
1 changed files with 2 additions and 2 deletions
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4
arch/powerpc/Kbuild
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@ -1,6 +1,6 @@
# SPDX-License-Identifier: GPL-2.0 # SPDX-License-Identifier: GPL-2.0
subdir-ccflags-$(CONFIG_PPC_WERROR) := -Werror -Wa,-fatal-warnings subdir-ccflags-$(CONFIG_PPC_WERROR) := -Werror -Wa,--fatal-warnings
subdir-asflags-$(CONFIG_PPC_WERROR) := -Wa,-fatal-warnings subdir-asflags-$(CONFIG_PPC_WERROR) := -Wa,--fatal-warnings
obj-y += kernel/ obj-y += kernel/
obj-y += mm/ obj-y += mm/