lnn.c:4:9: fatal error: 'nanomsg/nn.h' file not found, torch nn安装错误解决办法

问题:

    ubuntu@ubuntu-PC:~/liujie/luarocks-2.1.0$ sudo luarocks install nn

    Installing https://rocks.moonscript.org/nn-1.0.4-1.src.rock...
    Using https://rocks.moonscript.org/nn-1.0.4-1.src.rock... switching to 'build' mode
    gcc -O2 -fPIC -I/usr/include/lua5.1 -c lnn.c -o lnn.o
    lnn.c:4:23: fatal error: nanomsg/nn.h: No such file or directory
    compilation terminated.

    Error: Build error: Failed compiling object lnn.o

解决办法:

    sudo ~/torch/install/bin/luarocks install nn

    其中, ~/torch/指的是torch的安装路径