On Mon, 14 Oct 2024, Matthew Malcomson wrote: > 4. __atomic_feraiseexcept should be a builtin to avoid previously > unnecessary requirement to link libatomic.
libatomic should be linked by default (with --as-needed); see bug 81358. But if your concern is e.g. libstdc++.so having DT_NEEDED for libatomic, that might not suffice. __atomic_feraiseexcept is a bit long to expand inline all the time (it's supposed to ensure that exceptions are raised including taking any enabled traps, so it's not just manipulating bits in the floating-point status register). On the other hand, if you're only concerned with one operation, only a subset of the checks in __atomic_feraiseexcept are relevant (for example, addition and subtraction can't raise FE_DIVBYZERO; and except for the exact underflow case which __atomic_feraiseexcept doesn't handle anyway, they can't raise FE_UNDERFLOW). -- Joseph S. Myers josmy...@redhat.com
