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build-sys: cfi_debug and safe_stack are not compatible

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It fails to link on fedora >= 41:
/usr/bin/ld: /usr/bin/../lib/clang/20/lib/x86_64-redhat-linux-gnu/libclang_rt.safestack.a(safestack.cpp.o): in function `__sanitizer_internal_memcpy':
(.text.__sanitizer_internal_memcpy+0x0): multiple definition of `__sanitizer_internal_memcpy'; /usr/bin/../lib/clang/20/lib/x86_64-redhat-linux-gnu/libclang_rt.ubsan_standalone.a(sanitizer_libc.cpp.o):(.text.__sanitizer_internal_memcpy+0x0): first defined here
/usr/bin/ld: /usr/bin/../lib/clang/20/lib/x86_64-redhat-linux-gnu/libclang_rt.safestack.a(safestack.cpp.o): in function `__sanitizer_internal_memmove':
(.text.__sanitizer_internal_memmove+0x0): multiple definition of `__sanitizer_internal_memmove'; /usr/bin/../lib/clang/20/lib/x86_64-redhat-linux-gnu/libclang_rt.ubsan_standalone.a(sanitizer_libc.cpp.o):(.text.__sanitizer_internal_memmove+0x0): first defined here
/usr/bin/ld: /usr/bin/../lib/clang/20/lib/x86_64-redhat-linux-gnu/libclang_rt.safestack.a(safestack.cpp.o): in function `__sanitizer_internal_memset':
(.text.__sanitizer_internal_memset+0x0): multiple definition of `__sanitizer_internal_memset'; /usr/bin/../lib/clang/20/lib/x86_64-redhat-linux-gnu/libclang_rt.ubsan_standalone.a(sanitizer_libc.cpp.o):(.text.__sanitizer_internal_memset+0x0): first defined here

cfi_debug seems to pull ubsan which has conflicting symbols with safe_stack.

See also: https://bugzilla.redhat.com/show_bug.cgi?id=2397265

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-ID: <20250924120426.2158655-12-marcandre.lureau@redhat.com>
This commit is contained in:
Marc-André Lureau 2025-09-24 16:04:08 +04:00
parent 59352b789a
commit c3ff31fa2b
2 changed files with 6 additions and 3 deletions
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3
meson.build
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@ -681,6 +681,9 @@ if get_option('cfi')
error('-fsanitize-cfi-icall-generalize-pointers is not supported by the compiler')
endif
if get_option('cfi_debug')
if get_option('safe_stack')
error('cfi_debug is not compatible with safe_stack')
endif
if cc.compiles('int main () { return 0; }',
name: '-fno-sanitize-trap=cfi-icall',
args: ['-flto', '-fsanitize=cfi-icall',