tests: do not unconditionally depend on dlsym #923
Merged
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Older versions of glibc do not have dl as builtin in. Thus include libdl when it's available.
While at it also make the mock library to depend hard on the presents of dlsym. It's only necessary for s390.
Fixes: cbbfdd0 ("test/mock: pass thru unknown ioctls")
Reported-by: Steven Seungcheol Lee [email protected]