Linking fails with clang 12

[awvwgk]

Another issue with the LLVM toolchain, linking with the clang and the ld on MacOS (LLVM based) I get an error because the --no-as-needed option is unknown.

[8/8] Linking CXX shared library src/Xtb/xtb.module.dylib
FAILED: src/Xtb/xtb.module.dylib 
: && $BUILD_PREFIX/bin/x86_64-apple-darwin13.4.0-clang++ -march=core2 -mtune=haswell -mssse3 -ftree-vectorize -fPIC -fPIE -fstack-protector-strong -O2 -pipe -stdlib=libc++ -fvisibility-inlines-hidden -fmessage-length=0 -isystem $PREFIX/include -fdebug-prefix-map=$SRC_DIR=/usr/local/src/conda/scine-xtb-1.0.0 -fdebug-prefix-map=$PREFIX=/usr/local/src/conda-prefix -Wall -Wextra -Wpedantic -O3 -DNDEBUG -isysroot /Applications/Xcode_12.4.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk -mmacosx-version-min=10.9 -dynamiclib -Wl,-headerpad_max_install_names -Wl,-pie -Wl,-headerpad_max_install_names -Wl,-dead_strip_dylibs -Wl,-rpath,$PREFIX/lib -L$PREFIX/lib  -Wl,--no-as-needed -o src/Xtb/xtb.module.dylib -install_name @rpath/xtb.module.dylib src/Xtb/CMakeFiles/Xtb.dir/Xtb/Wrapper/GFN0Wrapper.cpp.o src/Xtb/CMakeFiles/Xtb.dir/Xtb/Wrapper/GFN1Wrapper.cpp.o src/Xtb/CMakeFiles/Xtb.dir/Xtb/Wrapper/GFN2Wrapper.cpp.o src/Xtb/CMakeFiles/Xtb.dir/Xtb/Wrapper/GFNFFWrapper.cpp.o src/Xtb/CMakeFiles/Xtb.dir/Xtb/Wrapper/XtbCalculatorBase.cpp.o src/Xtb/CMakeFiles/Xtb.dir/Xtb/Wrapper/XtbSettings.cpp.o src/Xtb/CMakeFiles/Xtb.dir/Xtb/XtbModule.cpp.o  $PREFIX/lib/libutilsos.dylib  -lgfortran  $PREFIX/lib/libboost_filesystem.dylib  $PREFIX/lib/libboost_system.dylib  -framework  Accelerate  $PREFIX/lib/libxtb.dylib && :
ld: unknown option: --no-as-needed
clang-12: error: linker command failed with exit code 1 (use -v to see invocation)
ninja: build stopped: subcommand failed.

System info

     active environment : base
    active env location : /Users/runner/mambaforge
            shell level : 1
       user config file : /Users/runner/.condarc
 populated config files : /Users/runner/mambaforge/.condarc
          conda version : 4.12.0
    conda-build version : 3.21.8
         python version : 3.9.10.final.0
       virtual packages : __osx=10.15.7=0
                          __unix=0=0
                          __archspec=1=x86_64
       base environment : /Users/runner/mambaforge  (writable)
      conda av data dir : /Users/runner/mambaforge/etc/conda
  conda av metadata url : None
           channel URLs : https://conda.anaconda.org/conda-forge/osx-64
                          https://conda.anaconda.org/conda-forge/noarch
          package cache : /Users/runner/mambaforge/pkgs
                          /Users/runner/.conda/pkgs
       envs directories : /Users/runner/mambaforge/envs
                          /Users/runner/.conda/envs
               platform : osx-64
             user-agent : conda/4.12.0 requests/2.27.1 CPython/3.9.10 Darwin/19.6.0 OSX/10.15.7
                UID:GID : 501:20
             netrc file : None
           offline mode : False

[weymutht]

Thanks for reporting this. Maybe we can find a way to work around this, but please note that we cannot really offer support for OSX.

[awvwgk]

This line should be removed for building with clang on OSX:

xtb_wrapper/src/Xtb/CMakeLists.txt

Line 39 in bbc449c

set_target_properties(Xtb PROPERTIES LINK_FLAGS "-Wl,--no-as-needed")