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[libc] set -Wno-frame-address for thread.cpp (#77140)

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The aarch64 code is using __builtin_return_address with a non-zero
parameter,
which generates the following warning:

llvm-project/libc/src/__support/threads/linux/thread.cpp:171:38: error:
calling '__builtin_frame_address' with a nonzero argument is unsafe
        [-Werror,-Wframe-address]
171 | return reinterpret_cast<uintptr_t>(__builtin_frame_address(1));
| ^~~~~~~~~~~~~~~~~~~~~~~~~~
    
Disable this diagnostic just for this file so that we can enable
-Werror.
    
Fixes: #77007
This commit is contained in:
Nick Desaulniers 2024-01-08 08:51:44 -08:00 committed by GitHub
parent ff47989ec2
commit 12101ca8e3
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2
libc/src/__support/threads/linux/CMakeLists.txt
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@ -39,6 +39,8 @@ add_object_library(
-O3
-fno-omit-frame-pointer # This allows us to sniff out the thread args from
# the new thread's stack reliably.
-Wno-frame-address # Yes, calling __builtin_return_address with a
# value other than 0 is dangerous. We know.
)
add_object_library(