Re: [PATCH v2 11/27] build-sys: cfi_debug and safe_stack are not compatible

["Daniel P. Berrangé" <berrange@redhat.com>]

On Wed, Sep 24, 2025 at 04:04:08PM +0400, marcandre.lureau@redhat.com wrote:
> From: Marc-André Lureau <marcandre.lureau@redhat.com>
> 
> 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>
> ---
>  meson.build                | 3 +++
>  .gitlab-ci.d/buildtest.yml | 6 +++---
>  2 files changed, 6 insertions(+), 3 deletions(-)

Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>


With regards,
Daniel
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