Missing ___emutls_get_address with gcc-4.7 and openMP

Question

I am trying to compile a program using a self-compiled GCC-4.7.1 on Mac OS 10.8.2. The program uses openMP and the compilation succeeds; however, when I try to run the program,

Answer 1

I had exactly the same problem. In my case it was caused by linking against a library (I don't remember which one) of an older version of gcc installed by XCode, which was in /usr/lib. When I corrected it to link against the newer gcc library of the version I used for compiling (in /usr/local) this error was fixed.

So just check your built executable and all the libraries it is linked with using

otool -L EXECUTABLE_OR_DYLIB

And if you find anything linked with a library of an older gcc, fix that.