[libc-commits] [clang] [libc] Add clang warning if fp exception functions are called without appropriate flags/pragmas (PR #199009)

[Marcos Ramirez Joos via libc-commits]

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@@ -37,26 +37,41 @@
 namespace LIBC_NAMESPACE_DECL {
 namespace fputil {
 
-LIBC_INLINE int clear_except(int excepts) { return feclearexcept(excepts); }
+LIBC_INLINE int clear_except(int excepts) {
+#pragma STDC FENV_ACCESS ON
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maarcosrmz wrote:

I'd actually be this: https://godbolt.org/z/7vqeznnxG
The fallback refers to the case when `#pragma clang fp exceptions(maytrap)` is not supported but `#pragma STDC FENV_ACCESS ON` is.

https://github.com/llvm/llvm-project/pull/199009