linker woes - undefined reference

Question

I\'m having a problem with my compiler telling me there is an \'undefined reference to\' a function I want to use in a library. Let me share some info on the problem:

Answer 1

I guess you have to add the path where the linker can find the libraray. In gcc/ld you can do this with -L and libraray with -l.

-Ldir, --library-path=dir

Search directory dir before standard search directories (this option must precede the -l option that searches that directory).

-larch, --library=archive

Include the archive file arch in the list of files to link.

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Response to answers - there is no .a library file, just .h and .c in the library, so -l isn't approriate

Then you may have to create the libraray first?

gcc -c mylib.c -o mylib.o
ar  rcs libmylib.a      mylib.o