gcc not working and solved (Mac)

By afrescoUncategorized

Installing SID problem:

After successfully installing the first part of SID and continuing the instructions below:

cd SID

mkdir Build

cd Build

cmake -DCMAKE_C_COMPILER=/opt/local/bin/gcc -DCMAKE_CXX_COMPILER=/opt/local/bin/c++ ..

An error occurred, gcc wasn’t found. When I tried in terminal “gcc -v” it showed that it was installed and gave the installed directory, but when I entered the directory I only found c++. When used “which gcc” it gave the directory: “usr/bin/gcc” which is not the one we need.

So I continued by trying to install gcc via sudo port and the Error: “Port gcc not found” appeared. Solved this by adding the version number: “sudo port install gcc7”.

After successful installation again tried “which gcc” which still gave me the “usr/bin/gcc”, meaning, it still didn’t work. Since I need it to be in /opt/local/bin.

At the end it was solved with: “sudo ln -s g++-mp-7 g++” and “sudo ln -s g++ -mp-7 c++”.

Finally, make sure you “export PATH=/usr/local/mysql/bin:$PATH”, and continue with the installation (sudo make install, etc).

 

One thought on “gcc not working and solved (Mac)”

  1. Perfect. Just for the sake of clarity:

    the symbolic link command (ln -s) must be done in the “/opt/local/bin” directory where the versioned gcc/g++/c++ reside.
    I am still searching, but I do not understand why this links are not done automatically at installation time. For example on my Mac, using the “readlink” commad (could have used “ls -l”):
    % readlink -f /opt/local/bin/c++
    /opt/local/bin/c++-mp-6
    % readlink -f /opt/local/bin/gcc
    /opt/local/bin/gcc-mp-6
    % readlink -f /opt/local/bin/g++
    /opt/local/bin/g++-mp-6

    L.

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