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After a brew upgrade every time I try to compile a .c file I get the following error:

ld: library not found for -lgcc
collect2: error: ld returned 1 exit status

Wrappers like mpicc still work though. I tried relinking with brew link --overwrite gcc, but got no working results, as it is already linked. brew doctor doesn't give me a hint.

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  • What is library gcc? What is the full line you are using to compile? .c files are compiled to .o and are not linked. Why use brew's gcc rather than Apple's clang?
    – mmmmmm
    Jun 21, 2016 at 11:10
  • @Mark, just compiling a simple Hello World program with gcc -o helloworld helloworld.c fails and shows that error.
    – tulians
    Jun 21, 2016 at 11:12
  • Where is gcc i.e. what does type -p gcc show
    – mmmmmm
    Jun 21, 2016 at 11:13
  • It's in /usr/local/bin/gcc
    – tulians
    Jun 21, 2016 at 11:14
  • See github.com/Homebrew/legacy-homebrew/issues/40653 what version of Xcode do you have
    – mmmmmm
    Jun 21, 2016 at 11:34

1 Answer 1

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I'm not sure with it's like this, but if I compile with gcc-4.9 (as the gcc version I have instaled is version 4.9.2) instead of gcc it works as it should. So the compilation sentence that seems to work is gcc-4.9 -o exec_name program.c. If someone knows why it is like this I would be interested to know.

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