https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109378
--- Comment #4 from g.peterh...@t-online.de --- Hm. Maybe we misunderstood each other or I don't understand. I don't want to set -fno-math-errno or any other compiler-specific flag. My intention is that __builtin_sqrt doesn't "contaminate" the calling context with internals of __builtin_sqrt, but simply returns the result.