On 2023-07-08 15:53, Mark Geisert wrote:
Mark Geisert wrote:
I got tripped up by misspelling and not being able to link clang{,++} programs
on my test system. I checked the .o files with objdump: Clang and clang++ both
support __builtin_popcountl, but they emit code for the Hackers Delight
algorithm rather than using the single-instruction popcnt. Sorry for the
confustion [sic].
That's what I meant - clang 8 "identifies as" gcc 4, and builtin and intrinsic
function support are almost the same (and fairly close to gcc 11) builtin and
intrinsic function support.
And as you mentioned, any support for builtins is better than what we can whip
up off the top of our heads (unless you use HD/2!)
For our purposes, the main differences between clang 8 and current are latest
language, library, and processor support, but it also supports useful tools like
the analyzer and formatter, which gcc does not provide.
And it is convenient to be able to run another compiler side by side for
comparisons without copying files and remoting to another system.
--
Take care. Thanks, Brian Inglis Calgary, Alberta, Canada
La perfection est atteinte Perfection is achieved
non pas lorsqu'il n'y a plus rien à ajouter not when there is no more to add
mais lorsqu'il n'y a plus rien à retirer but when there is no more to cut
-- Antoine de Saint-Exupéry
