compilation erreor with rpath= on mac

I have a compilation error when I try to compile the code on my mac when I use the arch file generated by arch/build_arch-auto.sh. The problem comes from the use of -Wl,-rpath=.

A fix is given on this page, I had to remplace the =by a ,: -Wl,-rpath,.

If I understand correctly, this fix is necessary when gcc uses clangas a linker.

We need to figure out if this fix is working on other machines...