linkergnu-toolchain

How do I link a library file in GCC that does not start with lib?


When I link a library such as libm in with ld, I need to drop the lib prefix. What if the file does not follow this naming convention? Is there a way to link it other than renaming the file?


Solution

  • You can link against any library, e.g. foo.a, by specifying full path to it on the link line:

    gcc main.o /path/to/foo.a
    

    What you lose with non-standard library name is the ability for the linker to search for it, e.g. this will not work:

    gcc main.o -L/path/to foo.a
    

    You can avoid that lack of search by using -l:foo.a syntax:

    gcc main.o -L/path/one -L/path/two -l:foo.a
    

    When I link a library such as libm in with ld

    Note that in general you should not link anything with ld. Use the compiler driver instead -- it adds objects and libraries to the link line that are required for correct result.