| Issue |
109599
|
| Summary |
LLVM 19.1.0 clang-cl x86 target, /fp:fast, acosf breaks link
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
Nick-Kooij
|
The following program prints π and exits:
````
#include <cmath>
#include <cstdio>
int main( int argc, char** argv ) {
printf( "%f\n", acosf( 0.0f ) * 2 );
return 0;
}
````
Compiling the above single-module program with **LLVM 19.1.0** through the **clang-cl** driver, targeting **x86**, with the **fast math (/fp:fast)** switch fails to link:
````
lld-link : error : undefined symbol: _acosf
````
## Steps to reproduce:
* Obtained [LLVM-19.1.0-win64.exe](https://github.com/llvm/llvm-project/releases/download/llvmorg-19.1.0/LLVM-19.1.0-win64.exe) from the official Assests.
* Install on **Windows 11** with **Visual Studio 2022 17.11.4**
* Must build a *x86* target
* x64 targets link and run properly
* Must use the /fp:fast fast math mode compiler switch
This issue was introduced with **LLVM 19.1.0,** and is not a result of changes to Visual Studio. Prior versions, such as **LLVM 18.1.8**, link properly, using the aforementioned version Visual Studio.
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