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Embed C++ directly inside your rust code!
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error adding symbols: DSO missing from command line #76

Closed ansjsun closed 4 years ago

ansjsun commented 4 years ago

I make and install faiss in system.

I compile by g++ is ok

/**
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

#include <cmath>
#include <cstdio>
#include <cstdlib>

#include <sys/time.h>

#include <faiss/IndexPQ.h>
#include <faiss/IndexIVFPQ.h>
#include <faiss/IndexFlat.h>
#include <faiss/index_io.h>

double elapsed()
{
    struct timeval tv;
    gettimeofday(&tv, nullptr);
    return tv.tv_sec + tv.tv_usec * 1e-6;
}

int main()
{
    double t0 = elapsed();

    int d = 64;

    size_t nb = 1000 * 1000;
    size_t add_bs = 10000;

    size_t nt = 100 * 1000;

    size_t nhash = 2;
    size_t nbits_subq = 9;
    size_t ncentroids = 1 << (nhash * nbits_subq); // total # of centroids
    int bytes_per_code = 16;

    faiss::MultiIndexQuantizer coarse_quantizer(d, nhash, nbits_subq);
}

but use rust -cpp, has fail 

warning:              ^~~~~~~~~~~~~~
   Compiling hello v0.1.0 (/home/ansj/rustworksapce/hello)
error: linking with `cc` failed: exit code: 1
  = note: "cc" "-Wl,--as-needed" "-Wl,-z,noexecstack" "-m64" "-L" "............." "-ldl" "-lrt" "-lpthread" "-lgcc_s" "-lc" "-lm" "-lrt" "-lpthread" "-lutil" "-lutil"
  = note: /usr/bin/ld: /home/ansj/rustworksapce/hello/target/debug/build/hello-64c7196ef49206ed/out/librust_cpp_generated.a(cpp_closures.o): undefined reference to symbol '__gxx_personality_v0@@CXXABI_1.3'
          //lib/x86_64-linux-gnu/libstdc++.so.6: error adding symbols: DSO missing from command line
          collect2: error: ld returned 1 exit status

my code is"

build.rs

fn main() {
    println!("cargo:rustc-link-lib=faiss");
    cpp_build::Config::new()
        .cpp_link_stdlib(Some("faiss"))
        .build("src/lib.rs");
}

lib.rs

#![recursion_limit = "512"]
#![cfg_attr(not(test), allow(dead_code, unused_imports))]

#[macro_use]
extern crate cpp;

cpp! {{
    #include <cmath>
    #include <cstdio>
    #include <cstdlib>

    #include <sys/time.h>

    #include <faiss/IndexPQ.h>
    #include <faiss/IndexIVFPQ.h>
    #include <faiss/IndexFlat.h>
    #include <faiss/index_io.h>

    double elapsed()
    {
        struct timeval tv;
        gettimeofday(&tv, nullptr);
        return tv.tv_sec + tv.tv_usec * 1e-6;
    }

    int bcd()
    {
        double t0 = elapsed();

        int d = 64;

        size_t nb = 1000 * 1000;
        size_t add_bs = 10000;

        size_t nt = 100 * 1000;

        size_t nhash = 2;
        size_t nbits_subq = 9;
        size_t ncentroids = 1 << (nhash * nbits_subq); // total # of centroids
        int bytes_per_code = 16;

        faiss::MultiIndexQuantizer coarse_quantizer(d, nhash, nbits_subq);

        return 0 ;
    }
}}

#[test]
fn captures() {
    unsafe {
        cpp! {[]{
            bcd();
        }}
    }
}
ogoffart commented 4 years ago

Googling the error undefined reference to symbol '__gxx_personality_v0@@CXXABI_1.3' reveals that this is caused by using the wrong std c++ library. indeed, you are doing:

.cpp_link_stdlib(Some("faiss"))

but that's meant to replace the std library, not adding your own library. Try removing this line.

In order to link against faiss, the println line you added should be enough.

ansjsun commented 4 years ago

thanks for your replay, it is a grate project Now I take build.rs to this .

fn main() {
    println!("cargo:rustc-link-lib=faiss");
    println!("cargo:rustc-link-lib=stdc++");
    cpp_build::Config::new().build("src/lib.rs");
}

or

fn main() {
    println!("cargo:rustc-link-lib=faiss");
    cpp_build::Config::new().build("src/lib.rs");
}

But I got 

= note: "cc" "-Wl,--as-needed" "-Wl,-z,noexecstack" "-m64" "-L" "/home/ansj/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "/home/ansj/rustworksapce/hello/target/debug/deps/hello-0cbb6866c962d6f9.124ddisnfpos9lxo.rcgu.o" "/home/ansj/rustworksapce/hello/target/debug/deps/hello-0cbb6866c962d6f9.1jfqgosp5i347vli.rcgu.o" "/home/ansj/rustworksapce/hello/target/debug/deps/hello-0cbb6866c962d6f9.1q2rf3yhihppd9ph.rcgu.o" "/home/ansj/rustworksapce/hello/target/debug/deps/hello-0cbb6866c962d6f9.1xea4d17ghpmajud.rcgu.o" "/home/ansj/rustworksapce/hello/target/debug/deps/hello-0cbb6866c962d6f9.2ntpl1fawdwdj8ii.rcgu.o" "/home/ansj/rustworksapce/hello/target/debug/deps/hello-0cbb6866c962d6f9.390xravyzwl26gsi.rcgu.o" "/home/ansj/rustworksapce/hello/target/debug/deps/hello-0cbb6866c962d6f9.3iqzyypn67h4qgca.rcgu.o" "/home/ansj/rustworksapce/hello/target/debug/deps/hello-0cbb6866c962d6f9.oivq2zyp44xtbes.rcgu.o" "/home/ansj/rustworksapce/hello/target/debug/deps/hello-0cbb6866c962d6f9.qy14ec1jhemw9ts.rcgu.o" "/home/ansj/rustworksapce/hello/target/debug/deps/hello-0cbb6866c962d6f9.y4e2jgb9n92r35y.rcgu.o" "-o" "/home/ansj/rustworksapce/hello/target/debug/deps/hello-0cbb6866c962d6f9" "/home/ansj/rustworksapce/hello/target/debug/deps/hello-0cbb6866c962d6f9.27qv7ws3oh1qrdwh.rcgu.o" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs" "-L" "/home/ansj/rustworksapce/hello/target/debug/deps" "-L" "/home/ansj/rustworksapce/hello/target/debug/build/hello-64c7196ef49206ed/out" "-L" "/home/ansj/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-lfaiss" "-Wl,-Bstatic" "-Wl,--whole-archive" "-lrust_cpp_generated" "-Wl,--no-whole-archive" "-Wl,-Bdynamic" "-lstdc++" "-Wl,-Bstatic" "/home/ansj/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libtest-a8145b8d68165abb.rlib" "/home/ansj/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libterm-4ca06a016781ab88.rlib" "/home/ansj/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libgetopts-db92cd117318c238.rlib" "/home/ansj/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunicode_width-c201880a4dbbde6b.rlib" "/home/ansj/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_std-d419b37ed18b6a41.rlib" "/home/ansj/rustworksapce/hello/target/debug/deps/libcpp-f93b0ae0996157b2.rlib" "-Wl,--start-group" "/home/ansj/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-9d59e25e2eb2384d.rlib" "/home/ansj/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libpanic_unwind-4affccee0db9d60e.rlib" "/home/ansj/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libhashbrown-cd6b495608e342d1.rlib" "/home/ansj/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_alloc-347d88a586b28b4c.rlib" "/home/ansj/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libbacktrace-46f3dc0b263b900a.rlib" "/home/ansj/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libbacktrace_sys-6789aa6fbcfdf14c.rlib" "/home/ansj/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_demangle-9f9436f1ab051941.rlib" "/home/ansj/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunwind-ad8ec269e6d86d01.rlib" "/home/ansj/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcfg_if-3699f95d33475c27.rlib" "/home/ansj/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-fe798441633702e1.rlib" "/home/ansj/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-979288990efe6065.rlib" "/home/ansj/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-2181f1e1dd7399d7.rlib" "/home/ansj/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-b8952fd765001238.rlib" "-Wl,--end-group" "/home/ansj/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-e99fedbd2b621435.rlib" "-Wl,-Bdynamic" "-ldl" "-lrt" "-lpthread" "-lgcc_s" "-lc" "-lm" "-lrt" "-lpthread" "-lutil" "-lutil"
  = note: /home/ansj/rustworksapce/hello/target/debug/build/hello-64c7196ef49206ed/out/librust_cpp_generated.a(cpp_closures.o)：在函数‘bcd()’中：
          /home/ansj/rustworksapce/hello/src/lib.rs:42：对‘faiss::MultiIndexQuantizer::MultiIndexQuantizer(int, unsigned long, unsigned long)’未定义的引用
          /home/ansj/rustworksapce/hello/target/debug/build/hello-64c7196ef49206ed/out/librust_cpp_generated.a(cpp_closures.o)：在函数‘faiss::MultiIndexQuantizer::~MultiIndexQuantizer()’中：
          /usr/local/include/faiss/IndexPQ.h:147：对‘vtable for faiss::MultiIndexQuantizer’未定义的引用
          /usr/local/include/faiss/IndexPQ.h:147：对‘faiss::Index::~Index()’未定义的引用

take build.rs to 

fn main() {
    cpp_build::Config::new().build("src/lib.rs");
    println!("cargo:rustc-link-lib=static=faiss");
}

I got 

          /home/ansj/src/faiss/utils/hamming.cpp:334：对‘omp_get_num_threads’未定义的引用
          /home/ansj/src/faiss/utils/hamming.cpp:334：对‘omp_get_thread_num’未定义的引用
          //usr/local/lib/libfaiss.a(hamming.o)：在函数‘void faiss::hammings_knn_mc<faiss::HammingComputer8>(int, unsigned char const*, unsigned char const*, unsigned long, unsigned long, unsigned long, int*, long*) [clone ._omp_fn.10]’中：
          /home/ansj/src/faiss/utils/hamming.cpp:334：对‘omp_get_num_threads’未定义的引用
          /home/ansj/src/faiss/utils/hamming.cpp:334：对‘omp_get_thread_num’未定义的引用
          //usr/local/lib/libfaiss.a(hamming.o)：在函数‘void faiss::hammings_knn_mc<faiss::HammingComputer16>(int, unsigned char const*, unsigned char const*, unsigned long, unsigned long, unsigned long, int*, long*) [clone ._omp_fn.11]’中：
          /home/ansj/src/faiss/utils/hamming.cpp:334：对‘omp_get_num_threads’未定义的引用
          /home/ansj/src/faiss/utils/hamming.cpp:334：对‘omp_get_thread_num’未定义的引用
          //usr/local/lib/libfaiss.a(hamming.o)：在函数‘void faiss::hammings_knn_mc<faiss::HammingComputer32>(int, unsigned char const*, unsigned char const*, unsigned long, unsigned long, unsigned long, int*, long*) [clone ._omp_fn.12]’中：
          /home/ansj/src/faiss/utils/hamming.cpp:334：对‘omp_get_num_threads’未定义的引用
          /home/ansj/src/faiss/utils/hamming.cpp:334：对‘omp_get_thread_num’未定义的引用
          //usr/local/lib/libfaiss.a(hamming.o)：在函数‘void faiss::hammings_knn_mc<faiss::HammingComputerM8>(int, unsigned char const*, unsigned char const*, unsigned long, unsigned long, unsigned long, int*, long*) [clone ._omp_fn.13]’中：
          /home/ansj/src/faiss/utils/hamming.cpp:334：对‘omp_get_num_threads’未定义的引用
          /home/ansj/src/faiss/utils/hamming.cpp:334：对‘omp_get_thread_num’未定义的引用
          //usr/local/lib/libfaiss.a(hamming.o)：在函数‘void faiss::hammings_knn_mc<faiss::HammingComputerDefault>(int, unsigned char const*, unsigned char const*, unsigned long, unsigned long, unsigned long, int*, long*) [clone ._omp_fn.14]’中：
          /home/ansj/src/faiss/utils/hamming.cpp:334：对‘omp_get_num_threads’未定义的引用
          /home/ansj/src/faiss/utils/hamming.cpp:334：对‘omp_get_thread_num’未定义的引用
          //usr/local/lib/libfaiss.a(hamming.o)：在函数‘void faiss::hamming_range_search_template<faiss::HammingComputer32>(unsigned char const*, unsigned char const*, unsigned long, unsigned long, int, unsigned long, faiss::RangeSearchResult*) [clone ._omp_fn.18]’中：
          /home/ansj/src/faiss/utils/hamming.cpp:653：对‘omp_get_num_threads’未定义的引用
          /home/ansj/src/faiss/utils/hamming.cpp:653：对‘omp_get_thread_num’未定义的引用
          /home/ansj/src/faiss/utils/hamming.cpp:661：对‘GOMP_barrier’未定义的引用
          //usr/local/lib/libfaiss.a(hamming.o)：在函数‘void faiss::hamming_range_search_template<faiss::HammingComputerDefault>(unsigned char const*, unsigned char const*, unsigned long, unsigned long, int, unsigned long, faiss::RangeSearchResult*) [clone ._omp_fn.20]’中：
          /home/ansj/src/faiss/utils/hamming.cpp:653：对‘omp_get_num_threads’未定义的引用
          /home/ansj/src/faiss/utils/hamming.cpp:653：对‘omp_get_thread_num’未定义的引用
          /home/ansj/src/faiss/utils/hamming.cpp:661：对‘GOMP_barrier’未定义的引用
          //usr/local/lib/libfaiss.a(hamming.o)：在函数‘void faiss::hamming_range_search_template<faiss::HammingComputer4>(unsigned char const*, unsigned char const*, unsigned long, unsigned long, int, unsigned long, faiss::RangeSearchResult*) [clone ._omp_fn.15]’中：
          /home/ansj/src/faiss/utils/hamming.cpp:653：对‘omp_get_num_threads’未定义的引用
          /home/ansj/src/faiss/utils/hamming.cpp:653：对‘omp_get_thread_num’未定义的引用
          /home/ansj/src/faiss/utils/hamming.cpp:661：对‘GOMP_barrier’未定义的引用
          //usr/local/lib/libfaiss.a(hamming.o)：在函数‘void faiss::hamming_range_search_template<faiss::HammingComputer8>(unsigned char const*, unsigned char const*, unsigned long, unsigned long, int, unsigned long, faiss::RangeSearchResult*) [clone ._omp_fn.16]’中：
          /home/ansj/src/faiss/utils/hamming.cpp:653：对‘omp_get_num_threads’未定义的引用
          /home/ansj/src/faiss/utils/hamming.cpp:653：对‘omp_get_thread_num’未定义的引用
          /home/ansj/src/faiss/utils/hamming.cpp:661：对‘GOMP_barrier’未定义的引用
          //usr/local/lib/libfaiss.a(hamming.o)：在函数‘void faiss::hamming_range_search_template<faiss::HammingComputer16>(unsigned char const*, unsigned char const*, unsigned long, unsigned long, int, unsigned long, faiss::RangeSearchResult*) [clone ._omp_fn.17]’中：
          /home/ansj/src/faiss/utils/hamming.cpp:653：对‘omp_get_num_threads’未定义的引用
          /home/ansj/src/faiss/utils/hamming.cpp:653：对‘omp_get_thread_num’未定义的引用
          /home/ansj/src/faiss/utils/hamming.cpp:661：对‘GOMP_barrier’未定义的引用
          //usr/local/lib/libfaiss.a(hamming.o)：在函数‘void faiss::hamming_range_search_template<faiss::HammingComputerM8>(unsigned char const*, unsigned char const*, unsigned long, unsigned long, int, unsigned long, faiss::RangeSearchResult*) [clone ._omp_fn.19]’中：
          /home/ansj/src/faiss/utils/hamming.cpp:653：对‘omp_get_num_threads’未定义的引用
          /home/ansj/src/faiss/utils/hamming.cpp:653：对‘omp_get_thread_num’未定义的引用
          /home/ansj/src/faiss/utils/hamming.cpp:661：对‘GOMP_barrier’未定义的引用
          //usr/local/lib/libfaiss.a(hamming.o)：在函数‘void faiss::hammings_knn_hc<faiss::HammingComputer4>(int, faiss::HeapArray<faiss::CMax<int, long> >*, unsigned char const*, unsigned char const*, unsigned long, bool, bool) [clone ._omp_fn.3]’中：
          /home/ansj/src/faiss/utils/hamming.cpp:282：对‘omp_get_num_threads’未定义的引用
          /home/ansj/src/faiss/utils/hamming.cpp:282：对‘omp_get_thread_num’未定义的引用
          //usr/local/lib/libfaiss.a(hamming.o)：在函数‘void faiss::hammings_knn_hc<faiss::HammingComputer16>(int, faiss::HeapArray<faiss::CMax<int, long> >*, unsigned char const*, unsigned char const*, unsigned long, bool, bool) [clone ._omp_fn.5]’中：
          /home/ansj/src/faiss/utils/hamming.cpp:282：对‘omp_get_num_threads’未定义的引用
          /home/ansj/src/faiss/utils/hamming.cpp:282：对‘omp_get_thread_num’未定义的引用
          //usr/local/lib/libfaiss.a(hamming.o)：在函数‘void faiss::hammings_knn_hc<faiss::HammingComputerM8>(int, faiss::HeapArray<faiss::CMax<int, long> >*, unsigned char const*, unsigned char const*, unsigned long, bool, bool) [clone ._omp_fn.7]’中：
          /home/ansj/src/faiss/utils/hamming.cpp:282：对‘omp_get_num_threads’未定义的引用
          /home/ansj/src/faiss/utils/hamming.cpp:282：对‘omp_get_thread_num’未定义的引用
          //usr/local/lib/libfaiss.a(hamming.o)：在函数‘void faiss::hammings_knn_hc<faiss::HammingComputer32>(int, faiss::HeapArray<faiss::CMax<int, long> >*, unsigned char const*, unsigned char const*, unsigned long, bool, bool) [clone ._omp_fn.6]’中：
          /home/ansj/src/faiss/utils/hamming.cpp:282：对‘omp_get_num_threads’未定义的引用
          /home/ansj/src/faiss/utils/hamming.cpp:282：对‘omp_get_thread_num’未定义的引用
          //usr/local/lib/libfaiss.a(hamming.o)：在函数‘faiss::hammings_knn_hc_1(faiss::HeapArray<faiss::CMax<int, long> >*, unsigned long const*, unsigned long const*, unsigned long, bool, bool) [clone ._omp_fn.4]’中：
          /home/ansj/src/faiss/utils/hamming.cpp:382：对‘omp_get_num_threads’未定义的引用
          /home/ansj/src/faiss/utils/hamming.cpp:382：对‘omp_get_thread_num’未定义的引用
          //usr/local/lib/libfaiss.a(hamming.o)：在函数‘void faiss::hammings_knn_hc<faiss::HammingComputerDefault>(int, faiss::HeapArray<faiss::CMax<int, long> >*, unsigned char const*, unsigned char const*, unsigned long, bool, bool) [clone ._omp_fn.8]’中：
          /home/ansj/src/faiss/utils/hamming.cpp:283：对‘omp_get_num_threads’未定义的引用
          /home/ansj/src/faiss/utils/hamming.cpp:283：对‘omp_get_thread_num’未定义的引用
          //usr/local/lib/libfaiss.a(hamming.o)：在函数‘faiss::generalized_hammings_knn_hc(faiss::HeapArray<faiss::CMax<int, long> >*, unsigned char const*, unsigned char const*, unsigned long, unsigned long, int) [clone ._omp_fn.21]’中：
          /home/ansj/src/faiss/utils/hamming.cpp:840：对‘omp_get_num_threads’未定义的引用
          /home/ansj/src/faiss/utils/hamming.cpp:840：对‘omp_get_thread_num’未定义的引用
          //usr/local/lib/libfaiss.a(hamming.o)：在函数‘faiss::fvecs2bitvecs(float const*, unsigned char*, unsigned long, unsigned long) [clone ._omp_fn.0]’中：
          /home/ansj/src/faiss/utils/hamming.cpp:437：对‘omp_get_num_threads’未定义的引用
          /home/ansj/src/faiss/utils/hamming.cpp:437：对‘omp_get_thread_num’未定义的引用
          //usr/local/lib/libfaiss.a(hamming.o)：在函数‘faiss::fvecs2bitvecs(float const*, unsigned char*, unsigned long, unsigned long)’中：
          /home/ansj/src/faiss/utils/hamming.cpp:436：对‘GOMP_parallel’未定义的引用
          //usr/local/lib/libfaiss.a(hamming.o)：在函数‘faiss::bitvecs2fvecs(unsigned char const*, float*, unsigned long, unsigned long)’中：
          /home/ansj/src/faiss/utils/hamming.cpp:450：对‘GOMP_parallel’未定义的引用
          //usr/local/lib/libfaiss.a(hamming.o)：在函数‘faiss::bitvec_shuffle(unsigned long, unsigned long, unsigned long, int const*, unsigned char const*, unsigned char*)’中：
          /home/ansj/src/faiss/utils/hamming.cpp:499：对‘GOMP_parallel’未定义的引用
          //usr/local/lib/libfaiss.a(hamming.o)：在函数‘hammings_knn_hc<faiss::HammingComputer32>’中：
          /home/ansj/src/faiss/utils/hamming.cpp:282：对‘GOMP_parallel’未定义的引用
          //usr/local/lib/libfaiss.a(hamming.o)：在函数‘hammings_knn_hc<faiss::HammingComputer16>’中：
          /home/ansj/src/faiss/utils/hamming.cpp:282：对‘GOMP_parallel’未定义的引用
          //usr/local/lib/libfaiss.a(hamming.o):/home/ansj/src/faiss/utils/hamming.cpp:282: 跟着更多未定义的参考到 GOMP_parallel
ogoffart commented 4 years ago

Looks like you also need to link against omp, and maybe some other libraries (using println)

ansjsun commented 4 years ago

thx very mutch

take 

println!("cargo:rustc-link-lib=dylib=omp");
    println!("cargo:rustc-link-lib=dylib=faiss");
    cpp_build::Config::new().build("src/example.rs");

work by mac os .. grate project ++