I'm wondering if I've stumbled upon a bug in ld's --as-needed or
something I was not aware of, here's an example, foo.c:
extern void gtk_main();
int main() {
gtk_main();
}
Now, libgtk (as of FC5) contains lots of undefined gdk_* symbols, so
trying "gcc -lgtk foo.c" on the above fails as expected, and "gcc -lgdk
-lgtk foo.c" succeeds, again as expected. However, to my surprise, "gcc
-Wl,--as-needed -lgdk -lgtk foo.c" fails:
/tmp/ccImoouo.o: In function `main':
foo.c:(.text+0xa): undefined reference to `gtk_main'
collect2: ld returned 1 exit status
Is this how --as-needed should behave? Ie. the linker does not appear
to notice that linking with libgdk is actually needed in this case and
drops it -> boom.
gtk+ is just an easy-to-find example in Fedora, and in its case,
eliminating the non-weak symbols in libgtk by linking it with libgdk
would most likely be the correct way around the problem, ditto with the
majority of other undefined-non-weak-symbols-in-shared-libs cases out
there. But don't pay attention to those details, I'm curious whether
the above demonstrates a problem in --as-needed or not.
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