Groups   222 of 99+      julia-users › build and install Julia in Mac OSX 10.8 7 posts by 4 authors      Abhishek Sen    3 2 14     Hi all,  I am having following issues while installing Julia in MacOSX. I am not sure how to parse the error message. It will be awesome if someone could help me out on this. I couldn't find a similar discussion in the archive. If you are aware of such topic, please provide a link.  Undefined symbols for architecture x86_64:    _MAIN__ , referenced from:       _main in libgfortranbegin.a fmain.o  ld: symbol s  not found for architecture x86_64 collect2: ld returned 1 exit status make 4 :      libopenblasp-r0.2.8.dylib  Error 1 make 3 :      shared  Error 2     Clean the OpenBLAS build with 'make -C deps clean-openblas'. Rebuild with 'make OPENBLAS_USE_THREAD 0 if OpenBLAS had trouble linking libpthread.so, and with 'make OPENBLAS_TARGET_ARCH NEHALEM' if there were errors building SandyBridge support. Both these options can also be used simultaneously.     make 2 :      openblas-v0.2.8 libopenblas.dylib  Error 1 make 1 :      julia-release  Error 2 make:      release  Error 2  Regards, Abhishek      Jameson    3 2 14   I suspect that something is wrong with your fortran compiler.    0  0    Felix    3 2 14   Had a similar problem building julia the first time but re tried and it work, so re-try it.   0  0    Abhishek Sen    3 2 14   Unfortunately, it still doesn't work :    On Sunday, 2 March 2014 15:09:41 UTC-6, Felix wrote: Had a similar problem building julia the first time but re tried and it work, so re-try it.   0  0    David P. Sanders    3 3 14     El domingo, 2 de marzo de 2014 16:04:43 UTC-6, Abhishek Sen escribió: Unfortunately, it still doesn't work :   I had a possibly similar problem recently. My  solution  was to update homebrew and reinstall gfortran. If you are doing a parallel build, you may also want to try with different numbers of processes, and keep insisting, or even try a serial build.  If none of this works, I was asked to do  make   make.out 2  make.out  and post the output  make.out  as a gist so that people can look at it and try and work out what's going on...    On Sunday, 2 March 2014 15:09:41 UTC-6, Felix wrote: Had a similar problem building julia the first time but re tried and it work, so re-try it.      0  0    Felix    3 3 14   Try  make -C deps cleanall  then  make cleanall  and  make     0  0    Abhishek Sen    3 3 14   This issue has been solved. Problem was the fortran compiler. I was using homebrew to install it and ended up having an older version.   0  0