<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><span style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);" class="">Hello all, </span><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><br class=""></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);">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 </div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><br class=""></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><div class="" style="margin: 0px; font-stretch: normal; font-size: 13px; line-height: normal; font-family: Courier; color: rgb(59, 35, 34); background-color: rgb(215, 211, 183);"><span class="" style="font-variant-ligatures: no-common-ligatures;">ld: library not found for -lSystem</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 13px; line-height: normal; font-family: Courier; color: rgb(59, 35, 34); background-color: rgb(215, 211, 183);"><span class="" style="font-variant-ligatures: no-common-ligatures;">collect2: error: ld returned 1 exit status</span></div></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><br class=""></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><br class=""></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);">I have tried both gcc9 and gcc10</div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><br class=""></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);">gfortran -v gives this output :</div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><br class=""></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><div class="" style="margin: 0px; font-stretch: normal; font-size: 13px; line-height: normal; font-family: Courier; color: rgb(59, 35, 34); background-color: rgb(215, 211, 183);"><div class="" style="margin: 0px; font-stretch: normal; line-height: normal;"><span class="" style="font-variant-ligatures: no-common-ligatures;">Using built-in specs.</span></div><div class="" style="margin: 0px; font-stretch: normal; line-height: normal;"><span class="" style="font-variant-ligatures: no-common-ligatures;">COLLECT_GCC=gfortran</span></div><div class="" style="margin: 0px; font-stretch: normal; line-height: normal;"><span class="" style="font-variant-ligatures: no-common-ligatures;">COLLECT_LTO_WRAPPER=/opt/local/libexec/gcc/x86_64-apple-darwin20/10.2.0/lto-wrapper</span></div><div class="" style="margin: 0px; font-stretch: normal; line-height: normal;"><span class="" style="font-variant-ligatures: no-common-ligatures;">Target: x86_64-apple-darwin20</span></div><div class="" style="margin: 0px; font-stretch: normal; line-height: normal;"><span class="" style="font-variant-ligatures: no-common-ligatures;">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=<a href="https://trac.macports.org/newticket" class="">https://trac.macports.org/newticket</a> --enable-host-shared --disable-tls --with-pkgversion='MacPorts gcc10 10.2.0_4' --with-sysroot=/Library/Developer/CommandLineTools/SDKs/MacOSX11.0.sdk</span></div><div class="" style="margin: 0px; font-stretch: normal; line-height: normal;"><span class="" style="font-variant-ligatures: no-common-ligatures;">Thread model: posix</span></div><div class="" style="margin: 0px; font-stretch: normal; line-height: normal;"><span class="" style="font-variant-ligatures: no-common-ligatures;">Supported LTO compression algorithms: zlib</span></div><div class="" style="margin: 0px; font-stretch: normal; line-height: normal;"><span class="" style="font-variant-ligatures: no-common-ligatures;">gcc version 10.2.0 (MacPorts gcc10 10.2.0_4) </span></div></div></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;"><br class=""></span></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;">I’ve removed and reinstalled MacPorts and all packages but it didn’t help.</span></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;"><br class=""></span></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;">Any ideas what may be the problem here? </span></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;"><br class=""></span></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;">Thanks in advance for your help</span></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;"><br class=""></span></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;">Andreas </span></div><div class="" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;"><br class=""></span></div><div class="">
Dr. Seismologist
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