On Mon, 2 Mar 2026 at 21:24, Dima Pasechnik <[email protected]> wrote:
> On Mon, Mar 02, 2026 at 05:48:40PM +0100, Florian Weimer wrote: > > > I think this is an overwhelming evidence in favour of Autoconf > > > supporting this feature, documented, or not, by the upstream (i.e. > Apple). > > > The community knows how to use it, and uses it, there is no need to be > > > patronising here. By not supporting it Autotools shoot themselves in > the > > > foot, forcing users/developers of multi-platform OpenMP-using > applications > > > to look elsewhere for a build system supporting this > > > feature out of the box. > > > As I said, Meson supports it out of the box. Cmake supports it too. > > > > Okay, then it's a bit weird that it's not mentioned at all in the Apple > > documentation. > > I can only speculate that once you bought enough support from them, > they'd tell you. After all, "-Xpreprocessor -fopenmp" somehow has leaked > out > as a working option. > > Apparently instead of "-Xpreprocessing" one can use "-Xclang", although > it appears to be less popular. I don't know the difference between these > two - perhaps AC_OPENMP (and libtool?) should also test for "-Xclang > -fopenmp"? > > "-Xclang" is briefly mentioned in clang docs: > https://clang.llvm.org/docs/UsersManual.html > Does modern Xcode includes libomp “out of the box” or it need to be built separately from Homebrew/MacPorts/Git? (I have access to Catalina bot not to more modern version, and on Catalina it doesn’t)
