代码：虽然安装了块，但无法检测到gfortran

我相信我的问题类似于这篇文章：Linux：尽管安装了gfortran却找不到lgfortran。但是，由于建议的答案并不能解决我的问题，对于像我这样绝望的Linux新手来说，除了再次询问，似乎别无选择。

这是问题所在。我安装了GNU fortran编译器4.8.4，可以在终端中找到它

$ which gfortran-4.8 
/usr/bin/gfortran-4.8

和

$ locate gfortran
/usr/bin/gfortran-4.7
/usr/bin/gfortran-4.8
/usr/bin/x86_64-linux-gnu-gfortran-4.7 
/usr/bin/x86_64-linux-gnu-gfortran-4.8
/usr/lib/gcc/x86_64-linux-gnu/4.7/libgfortran.a
/usr/lib/gcc/x86_64-linux-gnu/4.7/libgfortran.so
/usr/lib/gcc/x86_64-linux-gnu/4.7/libgfortran.spec
/usr/lib/gcc/x86_64-linux-gnu/4.7/libgfortranbegin.a
/usr/lib/gcc/x86_64-linux-gnu/4.8/libgfortran.a
/usr/lib/gcc/x86_64-linux-gnu/4.8/libgfortran.so
/usr/lib/gcc/x86_64-linux-gnu/4.8/libgfortran.spec
/usr/lib/gcc/x86_64-linux-gnu/4.8/libgfortranbegin.a
/usr/lib/x86_64-linux-gnu/libgfortran.so.3
/usr/lib/x86_64-linux-gnu/libgfortran.so.3.0.0
/usr/share/doc/gfortran-4.7
/usr/share/doc/gfortran-4.8
/usr/share/doc/libgfortran-4.7-dev
/usr/share/doc/libgfortran-4.8-dev
/usr/share/doc/libgfortran3
/usr/share/man/man1/gfortran-4.7.1.gz
/usr/share/man/man1/gfortran-4.8.1.gz
/usr/share/man/man1/x86_64-linux-gnu-gfortran-4.7.1.gz
/usr/share/man/man1/x86_64-linux-gnu-gfortran-4.8.1.gz
/var/cache/apt/archives/gfortran-4.7_4.7.3-12ubuntu1_amd64.deb
/var/cache/apt/archives/gfortran-4.8_4.8.4-2ubuntu1~14.04_amd64.deb
/var/cache/apt/archives/libgfortran-4.7-dev_4.7.3-12ubuntu1_amd64.deb
/var/cache/apt/archives/libgfortran-4.8-dev_4.8.4-2ubuntu1~14.04_amd64.deb
/var/cache/apt/archives/libgfortran3_4.8.4-2ubuntu1~14.04_amd64.deb
/var/lib/dpkg/info/gfortran-4.7.list
/var/lib/dpkg/info/gfortran-4.7.md5sums
/var/lib/dpkg/info/gfortran-4.8.list
/var/lib/dpkg/info/gfortran-4.8.md5sums
/var/lib/dpkg/info/libgfortran-4.7-dev:amd64.list
/var/lib/dpkg/info/libgfortran-4.7-dev:amd64.md5sums
/var/lib/dpkg/info/libgfortran-4.8-dev:amd64.list
/var/lib/dpkg/info/libgfortran-4.8-dev:amd64.md5sums
/var/lib/dpkg/info/libgfortran3:amd64.list
/var/lib/dpkg/info/libgfortran3:amd64.md5sums
/var/lib/dpkg/info/libgfortran3:amd64.postinst
/var/lib/dpkg/info/libgfortran3:amd64.postrm
/var/lib/dpkg/info/libgfortran3:amd64.shlibs
/var/lib/dpkg/info/libgfortran3:amd64.symbols

所以gfortran似乎已经安装了，尽管我不明白为什么在删除它后4.7版本仍然存在。

在设置Code：Blocks的全局编译器设置时，当我选择GNU Fortran编译器及其工具链可执行文件时，我尝试将安装目录设置为

/usr 

/usr/bin 

和

/usr/lib/gcc/x86_64-linux-gnu/4.8/

如前一篇文章中所建议的，代码：块告诉我

could not auto-detect installation path of "GNU Fortran Compiler".....

图像中显示了编译器配置的更多详细信息（感谢Mike的建议）。

这是我计算机上编译器的完整列表：

编译器列表