Comment # 12 on bug 1182252 from Richard Biener

For sure in case the shared object dlopens plugins for example that use
pthreads
it's wrong to elide -lpthread.  --as-needed is prone to breaking this kind of
special links.

Note that libpthread is actually a linker script:

/* GNU ld script
   Use the shared library, but some functions are only in
   the static library, so try that secondarily.  */
OUTPUT_FORMAT(elf64-x86-64)
GROUP ( /lib64/libpthread.so.0 /usr/lib64/libpthread_nonshared.a )

so it should eventually be possible to elide --as-needed here in the script
in some way?

Or simply add SUSE_ASNEEDED=0 in the spec file (or drop this long-standing
patch).