[libc-commits] [libc] [libc] Fix feature check for riscv (PR #145169)

[Hans Wennborg via libc-commits]

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@@ -61,15 +61,15 @@
 
 #if defined(__riscv_flen)
 // https://github.com/riscv-non-isa/riscv-c-api-doc/blob/main/src/c-api.adoc
-#if (__riscv_flen & 0x10)
+#if (__riscv_arch_test && __riscv_zfhmin)
----------------
zmodem wrote:

We hit a compile error after this:

```
../../third_party/llvm-libc/src/src/__support/macros/properties/cpu_features.h:64:27: error: '__riscv_zfhmin' is not defined, evaluates to 0 [-Werror,-Wundef]
   64 | #if (__riscv_arch_test && __riscv_zfhmin)
      |                           ^
```

Should it be `#if ... defined(__riscv_zfhmin)` instead?

https://github.com/llvm/llvm-project/pull/145169