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Duplicate __builtin_clz symbols on MSVC Windows #167

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alexcrichton opened this issue Jun 24, 2017 · 2 comments · Fixed by #574
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Duplicate __builtin_clz symbols on MSVC Windows #167

alexcrichton opened this issue Jun 24, 2017 · 2 comments · Fixed by #574

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@alexcrichton
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This is due to the fact that their definition is not marked static. Filing an issue to track this, gonna add a FIXME for now.
@alexcrichton
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I opened an upstream diff for this.

@AaronKutch
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What's the status on this?

@trevyn trevyn mentioned this issue Oct 17, 2023
Merged
@trevyn trevyn mentioned this issue Jan 8, 2024
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compnerd pushed a commit to llvm/llvm-project that referenced this issue Jan 19, 2024
@trevyn
[builtins] Mark int_lib.h builtins as static (#69305)
d1a2f11 
Mark the following symbols as `static` to prevent duplicate definitions:

`__builtin_ctz`
`__builtin_clz`
`__builtin_clzll`
`__builtin_sadd_overflow`

>Without these then all of these functions show up in all object files
which include int_lib.h on Windows. This'll help prevent duplicate
symbols by ensuring they're not exported.

See:

rust-lang/compiler-builtins#167
https://reviews.llvm.org/D34599
@trevyn trevyn mentioned this issue Feb 8, 2024
Merged
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Remove duplicate symbol workaround trevyn/compiler-builtins
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@alexcrichton @AaronKutch