Re: Undefined use of weak symbols in gnulib

[Bruno Haible]

Andreas Schwab wrote:
> It is likely that the use of weak pthread symbols is not confined to
> gnulib.

Yes. Between 2000 and 2010 I heard a couple of times "Multithreading
support is only available through libpthread. It is a common technique
to use weak symbols to distinguish a program linked with -lpthread
from a program not linked with -lpthread (and such a program is
single-threaded)".

Also, people were saying "dlopen of libpthread does not work" [1][2].

Bruno

[1] https://jmmv.dev/2004/11/dynamic-open-of-libpthread-considered.html
[2] https://sourceware.org/bugzilla/show_bug.cgi?id=18192