[libc-commits] [libc] [libc][stdfix] Add abs functions for signed fixed point types. (PR #81823)

[via libc-commits]

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@@ -7,6 +7,13 @@ def StdcExt : StandardSpec<"stdc_ext"> {
       [],  // types
       [],  // enums
       [    // functions
+          GuardedFunctionSpec<"abshr", RetValSpec<ShortFractType>, [ArgSpec<ShortFractType>], "LIBC_COMPILER_HAS_FIXED_POINT">,
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lntue wrote:

I don't think we need to add that, because right now, if users try to use fixed point types / functions / macros without the compile flag, it will be a hard compile error.  And if we add the warnings, users will keep seeing them even if they don't use it and got it transitively.  And in a worse scenario, where they try to build with `-Werror`, those warnings will become hard errors.

https://github.com/llvm/llvm-project/pull/81823