| Issue |
97866
|
| Summary |
[Cuda] Fails to build anything with error: __float128 is not supported on this target
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
russeree
|
Hey currently I am having difficulty getting the Clang++ Cuda compiler to build anything on my instance of Arch Linux. The primary error being ``` error: __float128 is not supported on this target```
### System Specs
- Arch Linux - Up to date
- [Cuda 12.5](https://archlinux.org/packages/extra/x86_64/cuda/)
- LLVM 14.0.6, 16.0.6, 18.x.x
I have tried multiple versions of Clang and they all have the same behavior.
### My Code
https://gist.github.com/russeree/4756646281b36fcf1825eaf28330136b
### My Command
```
clang++ -x cuda --cuda-gpu-arch=sm_61 -I/opt/cuda/lib64 axpy.cu -o axpy -L/opt/cuda/lib32 -lcudart_static -ldl -lrt -pthread
```
I have tried the other flags such as
```
--std=c++17 -D__STRICT_ANSI__
```
These do not help at all
### Errors
```
/usr/lib64/gcc/x86_64-pc-linux-gnu/14.1.1/../../../../include/c++/14.1.1/limits:2089:27: error: __float128 is not supported on this target
2089 | struct numeric_limits<__float128>
| ^
/usr/lib64/gcc/x86_64-pc-linux-gnu/14.1.1/../../../../include/c++/14.1.1/limits:2093:33: error: __float128 is not supported on this target
2093 | static _GLIBCXX_CONSTEXPR __float128
| ^
/usr/lib64/gcc/x86_64-pc-linux-gnu/14.1.1/../../../../include/c++/14.1.1/limits:2104:33: error: __float128 is not supported on this target
2104 | static _GLIBCXX_CONSTEXPR __float128
| ^
/usr/lib64/gcc/x86_64-pc-linux-gnu/14.1.1/../../../../include/c++/14.1.1/limits:2118:33: error: __float128 is not supported on this target
2118 | static _GLIBCXX_CONSTEXPR __float128
| ^
/usr/lib64/gcc/x86_64-pc-linux-gnu/14.1.1/../../../../include/c++/14.1.1/limits:2132:33: error: __float128 is not supported on this target
2132 | static _GLIBCXX_CONSTEXPR __float128
| ^
/usr/lib64/gcc/x86_64-pc-linux-gnu/14.1.1/../../../../include/c++/14.1.1/limits:2136:33: error: __float128 is not supported on this target
2136 | static _GLIBCXX_CONSTEXPR __float128
| ^
/usr/lib64/gcc/x86_64-pc-linux-gnu/14.1.1/../../../../include/c++/14.1.1/limits:2156:33: error: __float128 is not supported on this target
2156 | static _GLIBCXX_CONSTEXPR __float128
| ^
/usr/lib64/gcc/x86_64-pc-linux-gnu/14.1.1/../../../../include/c++/14.1.1/limits:2160:33: error: __float128 is not supported on this target
2160 | static _GLIBCXX_CONSTEXPR __float128
| ^
/usr/lib64/gcc/x86_64-pc-linux-gnu/14.1.1/../../../../include/c++/14.1.1/limits:2164:33: error: __float128 is not supported on this target
2164 | static _GLIBCXX_CONSTEXPR __float128
| ^
/usr/lib64/gcc/x86_64-pc-linux-gnu/14.1.1/../../../../include/c++/14.1.1/limits:2176:33: error: __float128 is not supported on this target
2176 | static _GLIBCXX_CONSTEXPR __float128
| ^
/usr/lib64/gcc/x86_64-pc-linux-gnu/14.1.1/../../../../include/c++/14.1.1/limits:2170:28: error: __float128 is not supported on this target
```
Full log in this gist
https://gist.github.com/russeree/b77db6865093ee452f01ff797098a9fe
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