I’ve installed gcc11 on a M1 Mac Mini using MacPorts (MacOS 11.6, and compiled our suite of fortran programs with no issues. All of them excecute properly but one. When run, this error occurs: dyld: Library not loaded: /usr/lib/libSystem.B.dylib Referenced from: /Volumes/xHD/DMG/Shared/bin/11/pavlov7.out Reason: image not found [1] 14157 abort pavlov7.out If I check the libraries required by the program, I get the following otool -L /Volumes/xHD/DMG/Shared/bin/11/pavlov7.out /Volumes/xHD/DMG/Shared/bin/11/pavlov7.out: @rpath/libgfortran.5.dylib (compatibility version 6.0.0, current version 6.0.0) @rpath/libgcc_s.1.1.dylib (compatibility version 1.0.0, current version 1.1.0) /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1292.100.5) but /usr/lib does not contain libSystem. There is a description of the issue here <https://developer.apple.com/forums/thread/655588?answerId=665804022#665804022> and actually on the Mini I can find /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/lib/libSystem.B.tbd which is a text file containing references to reexported-libraries: - targets: [ x86_64-macos, x86_64-maccatalyst, arm64-macos, arm64-maccatalyst, arm64e-macos, arm64e-maccatalyst ] libraries: [ '/usr/lib/system/libcache.dylib', '/usr/lib/system/libcommonCrypto.dylib', '/usr/lib/system/libcompiler_rt.dylib', '/usr/lib/system/libcopyfile.dylib', '/usr/lib/system/libcorecrypto.dylib', '/usr/lib/system/libdispatch.dylib', '/usr/lib/system/libdyld.dylib', '/usr/lib/system/libkeymgr.dylib', '/usr/lib/system/liblaunch.dylib', '/usr/lib/system/libmacho.dylib', '/usr/lib/system/libquarantine.dylib', '/usr/lib/system/libremovefile.dylib', '/usr/lib/system/libsystem_asl.dylib', '/usr/lib/system/libsystem_blocks.dylib', '/usr/lib/system/libsystem_c.dylib', '/usr/lib/system/libsystem_collections.dylib', '/usr/lib/system/libsystem_configuration.dylib', '/usr/lib/system/libsystem_containermanager.dylib', '/usr/lib/system/libsystem_coreservices.dylib', '/usr/lib/system/libsystem_darwin.dylib', '/usr/lib/system/libsystem_dnssd.dylib', '/usr/lib/system/libsystem_featureflags.dylib', '/usr/lib/system/libsystem_info.dylib', '/usr/lib/system/libsystem_kernel.dylib', '/usr/lib/system/libsystem_m.dylib', '/usr/lib/system/libsystem_malloc.dylib', '/usr/lib/system/libsystem_networkextension.dylib', '/usr/lib/system/libsystem_notify.dylib', '/usr/lib/system/libsystem_platform.dylib', '/usr/lib/system/libsystem_product_info_filter.dylib', '/usr/lib/system/libsystem_pthread.dylib', '/usr/lib/system/libsystem_sandbox.dylib', '/usr/lib/system/libsystem_secinit.dylib', '/usr/lib/system/libsystem_symptoms.dylib', '/usr/lib/system/libsystem_trace.dylib', '/usr/lib/system/libunwind.dylib', '/usr/lib/system/libxpc.dylib' ] I've checked with otool other executables compiled with gfortran, and they all contain /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1292.100.5) but apparently they don’t need it at runtime, so they execute properly. I suspect the one program failing may require that library due to high memory allocation needs, so I tried to recompile that program with option -mcmodel=large, but compilation fails with hundreds of errors like these /var/folders/5m/npwgg_r174ncqgz7j9w3x_l00000gn/T//ccWZX2yC.s:11:15: error: invalid variant 'BLEAH' adrp x0, lC0@BLEAH ^ /var/folders/5m/npwgg_r174ncqgz7j9w3x_l00000gn/T//ccWZX2yC.s:18:15: error: invalid variant 'BLEAH' adrp x2, lC1@BLEAH which I can’t relate to any statement of the program. So I’ve two questions: 1) is there a solution for missing /usr/lib/libSystem.B.dylib? 2) why -mcmodel=large fails on this Mini (it works on a Linux box, but it fails on another Mac with Intel CPU with similar error but PLTOFF is mentioned instead of BLEAH) Thanks Franco
