> 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? —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
