Hello all, I’m working on a MBP, 2018 model and yesterday I updated to the latest version of BigSur. Since then I cannot compile any fortran code and the error I get is
ld: library not found for -lSystem collect2: error: ld returned 1 exit status I have tried both gcc9 and gcc10 gfortran -v gives this output : Using built-in specs. COLLECT_GCC=gfortran COLLECT_LTO_WRAPPER=/opt/local/libexec/gcc/x86_64-apple-darwin20/10.2.0/lto-wrapper Target: x86_64-apple-darwin20 Configured with: /opt/local/var/macports/build/_opt_bblocal_var_buildworker_ports_build_ports_lang_gcc10/gcc10/work/gcc-10.2.0/configure --prefix=/opt/local --build=x86_64-apple-darwin20 --enable-languages=c,c++,objc,obj-c++,lto,fortran,jit --libdir=/opt/local/lib/gcc10 --includedir=/opt/local/include/gcc10 --infodir=/opt/local/share/info --mandir=/opt/local/share/man --datarootdir=/opt/local/share/gcc-10 --with-local-prefix=/opt/local --with-system-zlib --disable-nls --program-suffix=-mp-10 --with-gxx-include-dir=/opt/local/include/gcc10/c++/ --with-gmp=/opt/local --with-mpfr=/opt/local --with-mpc=/opt/local --with-isl=/opt/local --enable-stage1-checking --disable-multilib --enable-lto --enable-libstdcxx-time --with-build-config=bootstrap-debug --with-as=/opt/local/bin/as --with-ld=/opt/local/bin/ld --with-ar=/opt/local/bin/ar --with-bugurl=https://trac.macports.org/newticket <https://trac.macports.org/newticket> --enable-host-shared --disable-tls --with-pkgversion='MacPorts gcc10 10.2.0_4' --with-sysroot=/Library/Developer/CommandLineTools/SDKs/MacOSX11.0.sdk Thread model: posix Supported LTO compression algorithms: zlib gcc version 10.2.0 (MacPorts gcc10 10.2.0_4) I’ve removed and reinstalled MacPorts and all packages but it didn’t help. Any ideas what may be the problem here? Thanks in advance for your help Andreas Dr. Seismologist
