Thank you for your update. I found some links that suggest this issue is related to the Apple linker, which is causing problems with Fortran linking.
1. https://urldefense.us/v3/__https://github.com/open-mpi/ompi/issues/12427__;!!G_uCfscf7eWS!bHY4uqpTfwl0jKopATQs3gw--TZSBmDp0Lb1gzDBeEu4ZB_zTph-jfw49yIr3jvPx0YEhQbk1PjYbGYVpjjms6Wb$ 2. https://urldefense.us/v3/__https://x.com/science_dot/status/1768667417553547635?s=46__;!!G_uCfscf7eWS!bHY4uqpTfwl0jKopATQs3gw--TZSBmDp0Lb1gzDBeEu4ZB_zTph-jfw49yIr3jvPx0YEhQbk1PjYbGYVptASYXS2$ Best wishes, Zongze > On 2 Apr 2024, at 01:15, Satish Balay <ba...@mcs.anl.gov> wrote: > > On Mon, 1 Apr 2024, Zongze Yang wrote: > >> >> I noticed this in the config.log of OpenMPI: >> ``` >> configure:30230: checking to see if mpifort compiler needs additional linker >> flags >> configure:30247: gfortran -o conftest -fPIC -ffree-line-length-none >> -ffree-line-length-0 -Wno-lto-type-mismatch -g -O0 -fallow-argument-mismatch >> -Wl,-flat_namespace -Wl,-commons,use_dylibs conftest.f90 >&5 >> ld: warning: -commons use_dylibs is no longer supported, using error >> treatment instead >> configure:30247: $? = 0 >> configure:30299: result: -Wl,-commons,use_dylibs >> ``` >> So, I find it odd that this flag isn't picked up on your platform, as it >> only checked the exit value. > > I get: > > configure:30247: gfortran -o conftest -fPIC -ffree-line-length-none > -ffree-line-length-0 -Wno-lto-type-mismatch -g -O0 -fallow-argument-mismatch > -Wl,-flat_namespace -Wl,-commons,use_dylibs conftest.f90 >&5 > ld: unknown options: -commons > collect2: error: ld returned 1 exit status > configure:30247: $? = 1 > configure: failed program was: > | program test > | integer :: i > | end program > configure:30299: result: none > > Note, I have and older xcode-15/CLT version: > > petsc@npro ~ % clang --version > Apple clang version 15.0.0 (clang-1500.1.0.2.5) > Target: arm64-apple-darwin23.3.0 > Thread model: posix > InstalledDir: /Library/Developer/CommandLineTools/usr/bin > > Satish
