1、在安裝opencv4.5時，出現了錯誤：libopencv_core.so.4.5.0: undefined reference to `cblas_zgemm'，想使用locate檢視下cblas_zgemm檔案，沒有locate命令

2、安裝locate工具：pacman -S mlocate,還是無法使用

3、更新資料庫：updatedb

4、locate cblas結果：

 1 /home/nication/WORKM/selfProgram/anaconda3/lib/python3.8/site-packages/torch/include/caffe2/utils/cblas.h
 2 /home/nication/WORKM/selfProgram/anaconda3/pkgs/pytorch-1.6
 
.0-py3.8_cuda10.2.89_cudnn7.6.5_0/lib/python3.8/site-packages/torch/include/caffe2/utils/cblas.h
 3 /usr/include/cblas.h
 4 /usr/include/cblas_f77.h
 5 /usr/include/cblas_mangling.h
 6 /usr/include/cblas_test.h
 7 /usr/include/gsl/gsl_cblas.h
 8 /usr/lib/libcblas.so
 9 /usr/lib/libcblas.so.3
10 /usr/lib/libcblas.so.3.9.0
11 /usr/lib/libgslcblas.so
 
12 /usr/lib/libgslcblas.so.0
13 /usr/lib/libgslcblas.so.0.0.0
14 /usr/lib/cmake/cblas-3.9.0
15 /usr/lib/cmake/cblas-3.9.0/cblas-config-version.cmake
16 /usr/lib/cmake/cblas-3.9.0/cblas-config.cmake
17 /usr/lib/cmake/cblas-3.9.0/cblas-targets-release.cmake
18 /usr/lib/cmake/cblas-3.9.0/cblas-targets.cmake
19 /usr/lib/pkgconfig/cblas.pc

大功告成，OK，繼續解決opencv4的原始碼編譯問題