Receive “undefined symbol” error when loading library with dlopen

Question

I\'m writing some code that uses dynamic shared libraries as plugins.

My command line for building the shared libraries looks like:

cc -shared -fPIC          


        

Answer 1

Correct solution is to add -rdynamic to the link command of the main executable. This will add appropriate option to ld (which, when using GNU ld, happens to be --export-dynamic).

Adding --export-dynamic directly is technically incorrect: it's a linker option, and so should be added as -Wl,--export-dynamic, or -Wl,-E. This is also less portable than -rdynamic (other linkers have an equivalent, but the option itself is different).