ubuntu16.04下OpenBLAS安装步骤

安装的步骤如下：

（1）git clone git://github.com/xianyi/OpenBLAS

（2）cd OpenBLAS

（3）sudo make FC=gfortran （如果没有安装gfortran,执行sudo apt-get install gfortran）

        也可以用这个指令，就把安装目录改为下面的目录了：/usr/local/Openblas/

         sudo make --PREFIX=/usr/local/Openblas/ install  /*安装*/

  (4) sudo make install (将OpenBLAS安装到/opt下)

结果如下：

make -j 8 -f Makefile.install install
make[1]: Entering directory '/home/lbg/下载/OpenBLAS'
Generating openblas_config.h in /opt/OpenBLAS/include
Generating f77blas.h in /opt/OpenBLAS/include
Generating cblas.h in /opt/OpenBLAS/include
Copying LAPACKE header files to /opt/OpenBLAS/include
Copying the static library to /opt/OpenBLAS/lib
Copying the shared library to /opt/OpenBLAS/lib
Generating openblas.pc in /opt/OpenBLAS/lib/pkgconfig
Generating OpenBLASConfig.cmake in /opt/OpenBLAS/lib/cmake/openblas
Generating OpenBLASConfigVersion.cmake in /opt/OpenBLAS/lib/cmake/openblas
Install OK!
make[1]: Leaving directory '/home/lbg/下载/OpenBLAS'

编译好的文件夹大小40M

（5）执行以下命令完成安装

   ln -s /opt/OpenBLAS/lib/libopenblas.so  /usr/lib/libblas.so.3

   ln -s /opt/OpenBLAS/lib/liblapack.so.3 /usr/lib/liblapack.so.3
   再次运行程序，则不会发生此类错误

make时报错：

/usr/bin/ld: cannot find -lgfortran Check what version of gcc, g++, and gfortran you have:g++ --versiongcc --versiongfortran --version

结果gfortran也有，在目录/usr/lib/x86_64-linux-gnu/里面，

sudo ln -s /usr/lib/x86_64-linux-gnu/libgfortran.so.3 /usr/lib/libgfortran.so

就可以了




使用编译例子：

gcc testOpenBlas.c  -I /opt/OpenBLAS/include/ -L/opt/OpenBLAS/lib -lopenblas