53056
`gem install nmatrix-lapacke`をしたところ下記のようなエラーが出まして，正常にインストールされていない模様です．  
対処法を調査してもわからないので，どなたかご教授お願い致します

以下，エラーログです．

```

    $ gem install nmatrix-lapacke
    Building native extensions. This could take a while...
    ERROR:  Error installing nmatrix-lapacke:
        ERROR: Failed to build gem native extension.
    
        current directory: /gpfs/home/home1/t163202/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/nmatrix-lapacke-0.2.4/ext/nmatrix_lapacke
    /gpfs/home/home1/t163202/.rbenv/versions/2.5.1/bin/ruby -r ./siteconf20190226-36390-ps5zbi.rb extconf.rb
    using C++ standard... c++11
    g++ reports version... gcc
    checking for rb_array_const_ptr() in ruby.h... yes
    checking for -llapack... no
    creating nmatrix_lapacke_config.h
    creating Makefile
    
    current directory: /gpfs/home/home1/t163202/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/nmatrix-lapacke-0.2.4/ext/nmatrix_lapacke
    make "DESTDIR=" clean
    
    current directory: /gpfs/home/home1/t163202/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/nmatrix-lapacke-0.2.4/ext/nmatrix_lapacke
    make "DESTDIR="
    compiling nmatrix_lapacke.cpp
    cc1plus: warning: command line option '-Wimplicit-int' is valid for C/ObjC but not for C++
    cc1plus: warning: unrecognized command line option '-Wno-self-assign'
    cc1plus: warning: unrecognized command line option '-Wno-constant-logical-operand'
    cc1plus: warning: unrecognized command line option '-Wno-parentheses-equality'
    cc1plus: warning: unrecognized command line option '-Wno-tautological-compare'
    compiling math_lapacke.cpp
    cc1plus: warning: command line option '-Wimplicit-int' is valid for C/ObjC but not for C++
    cc1plus: warning: unrecognized command line option '-Wno-self-assign'
    cc1plus: warning: unrecognized command line option '-Wno-constant-logical-operand'
    cc1plus: warning: unrecognized command line option '-Wno-parentheses-equality'
    cc1plus: warning: unrecognized command line option '-Wno-tautological-compare'
    compiling lapacke.cpp
    cc1plus: warning: command line option '-Wimplicit-int' is valid for C/ObjC but not for C++
    cc1plus: warning: unrecognized command line option '-Wno-self-assign'
    cc1plus: warning: unrecognized command line option '-Wno-constant-logical-operand'
    cc1plus: warning: unrecognized command line option '-Wno-parentheses-equality'
    cc1plus: warning: unrecognized command line option '-Wno-tautological-compare'
    linking shared-object nmatrix_lapacke.so
    /home/1/t163202/.linuxbrew/bin/ld: cannot find -llapack
    collect2: error: ld returned 1 exit status
    make: *** [nmatrix_lapacke.so] エラー 1
    
    make failed, exit code 2
    
    Gem files will remain installed in /gpfs/home/home1/t163202/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/gems/nmatrix-lapacke-0.2.4 for inspection.
    Results logged to /gpfs/home/home1/t163202/.rbenv/versions/2.5.1/lib/ruby/gems/2.5.0/extensions/x86_64-linux/2.5.0-static/nmatrix-lapacke-0.2.4/gem_make.out
    
```
CC BY-SA 4.0
2019-02-26T08:16:13.240
53051
2019-02-26T13:28:35.810
30173
question
ruby rubygems
gemのインストールエラーがわからない
依存するlapackというパッケージが存在しないためにエラーとなっています。  
お使いのOSに該当のライブラリを導入して再度インストールしてみてください。

<https://qiita.com/AnchorBlues/items/69c1744de818b5e045ab>  
<https://www.atmarkit.co.jp/flinux/rensai/linuxtips/a115makeerror.html>
CC BY-SA 4.0
2019-02-26T13:28:35.810
53056
2019-02-26T13:28:35.810
10174
53051
answer