On Mon, 30 Sept 2024, 13:02 Hans Åberg, <haberg_1@xxxxxxxxxx> wrote: > > > On 30 Sep 2024, at 11:38, Jonathan Wakely <jwakely.gcc@xxxxxxxxx> wrote: > > > > On Mon, 30 Sept 2024 at 08:25, Hans Åberg <haberg_1@xxxxxxxxxx> wrote: > >> > >> > >>> On 30 Sep 2024, at 09:20, Jonathan Wakely via Gcc-help < > gcc-help@xxxxxxxxxxx> wrote: > >>> > >>> On Sun, 29 Sept 2024, 21:15 Hans Åberg via Gcc-help, < > gcc-help@xxxxxxxxxxx> > >>> wrote: > >>> > >>>> There is a recursive package issue on MacPorts [1] on how to compile > GMP > >>>> for the GCC build: > >>>> > >>>> GMP 'make check' fails with Clang if assembly is enabled, but passes > with > >>>> GCC, and also with Clang if assembly is disabled. > >>>> > >>>> So the question is how to set the build of GCC, specifically, is GMP > used > >>>> only for the build, or also when it is run? > >>>> > >>> > >>> The GCC compiler binaries are linked to libgmp and use some of its > >>> functions when compiling user code. > >> > >> Is GMP used otherwise for the build itself? > > > > Yes, the GCC compiler binaries use it, and those binaries are used > > during bootstrap. > > I don't know whether they use the parts of your libgmp.dylib that > > misbehave when using Clang. That would require finding out exactly > > which parts of gmp are incorrect, … > > It may be Clang that is incorrect, ditching the C/C++ standards in favor > if mainstream programming. > > > …and whether each of those is ever > > used during GCC bootstrap. > > > > If you want to avoid rebuilding GMP after bootstrapping GCC and then > > rebuild GCC as well, the simplest solution would be to use the > > download_prerequisites script as described at > > https://gcc.gnu.org/wiki/InstallingGCC > > That will build GMP as part of the GCC bootstrap, linking statically > > to it (so the Clang-built libgmp.dylib already on the system won't be > > used). > > Is that script tried on MacOS? Not by me. —An old man page for ld said that on MacOS, static linking is only for > building the Mach kernel, and one cannot mix static and dynamic linking. > > >>>> 1. https://trac.macports.org/ticket/70859 > >
