Build fails with GCC: ld: duplicate symbol __ZTSN10similarity4HnswIfEE

[barracuda156]

This is on macOS 10.6 with gcc13:

ld: duplicate symbol __ZTSN10similarity4HnswIfEE in /opt/local/var/macports/build/_opt_PPCSnowLeopardPorts_math_nmslib/nmslib/work/nmslib-2.1.1/similarity_search/debug/libNonMetricSpaceLib.a(hnsw_distfunc_opt.cc.o) and /opt/local/var/macports/build/_opt_PPCSnowLeopardPorts_math_nmslib/nmslib/work/nmslib-2.1.1/similarity_search/debug/libNonMetricSpaceLib.a(hnsw.cc.o)
collect2: error: ld returned 1 exit status

[barracuda156]

Also confirmed to fail on macOS 14.4 with gcc12:

/opt/local/bin/g++-mp-12 -pipe -Os -DNDEBUG -I/opt/local/include -stdlib=libc++ -isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX14.sdk -arch arm64 -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX14.sdk -mmacosx-version-min=14.0 -Wl,-search_paths_first -Wl,-headerpad_max_install_names -L/opt/local/lib -Wl,-headerpad_max_install_names -Wl,-syslibroot,/Library/Developer/CommandLineTools/SDKs/MacOSX14.sdk CMakeFiles/bench_distfunc.dir/bench_distfunc.cc.o -o /opt/local/var/macports/build/_opt_svacchanda_SonomaPorts_math_nmslib/nmslib/work/nmslib-2.1.1/similarity_search/debug/bench_distfunc  -Wl,-rpath,/opt/local/lib /opt/local/var/macports/build/_opt_svacchanda_SonomaPorts_math_nmslib/nmslib/work/nmslib-2.1.1/similarity_search/debug/libNonMetricSpaceLib.a 
-macosx_version_min has been renamed to -macos_version_min
ld: warning: duplicate -rpath '/opt/local/lib' ignored
duplicate symbol '__ZTSN10similarity4HnswIiEE' in:
    /opt/local/var/macports/build/_opt_svacchanda_SonomaPorts_math_nmslib/nmslib/work/nmslib-2.1.1/similarity_search/debug/libNonMetricSpaceLib.a(hnsw.cc.o)
    /opt/local/var/macports/build/_opt_svacchanda_SonomaPorts_math_nmslib/nmslib/work/nmslib-2.1.1/similarity_search/debug/libNonMetricSpaceLib.a(hnsw_distfunc_opt.cc.o)
duplicate symbol '__ZTIN10similarity4HnswIiEE' in:
    /opt/local/var/macports/build/_opt_svacchanda_SonomaPorts_math_nmslib/nmslib/work/nmslib-2.1.1/similarity_search/debug/libNonMetricSpaceLib.a(hnsw.cc.o)
    /opt/local/var/macports/build/_opt_svacchanda_SonomaPorts_math_nmslib/nmslib/work/nmslib-2.1.1/similarity_search/debug/libNonMetricSpaceLib.a(hnsw_distfunc_opt.cc.o)
duplicate symbol '__ZTSN10similarity4HnswIfEE' in:
    /opt/local/var/macports/build/_opt_svacchanda_SonomaPorts_math_nmslib/nmslib/work/nmslib-2.1.1/similarity_search/debug/libNonMetricSpaceLib.a(hnsw.cc.o)
    /opt/local/var/macports/build/_opt_svacchanda_SonomaPorts_math_nmslib/nmslib/work/nmslib-2.1.1/similarity_search/debug/libNonMetricSpaceLib.a(hnsw_distfunc_opt.cc.o)
duplicate symbol '__ZTIN10similarity4HnswIfEE' in:
    /opt/local/var/macports/build/_opt_svacchanda_SonomaPorts_math_nmslib/nmslib/work/nmslib-2.1.1/similarity_search/debug/libNonMetricSpaceLib.a(hnsw.cc.o)
    /opt/local/var/macports/build/_opt_svacchanda_SonomaPorts_math_nmslib/nmslib/work/nmslib-2.1.1/similarity_search/debug/libNonMetricSpaceLib.a(hnsw_distfunc_opt.cc.o)
ld: 4 duplicate symbols for architecture arm64
collect2: error: ld returned 1 exit status
make[2]: *** [/opt/local/var/macports/build/_opt_svacchanda_SonomaPorts_math_nmslib/nmslib/work/nmslib-2.1.1/similarity_search/debug/bench_distfunc] Error 1
make[2]: Leaving directory `/opt/local/var/macports/build/_opt_svacchanda_SonomaPorts_math_nmslib/nmslib/work/build'
make[1]: *** [apps/CMakeFiles/bench_distfunc.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs....

[searchivarius]

thank you for submitting PRs and issues. It's been a while, but I am gonna work on the library again soon.