In <list-3012157@2rosenthals.com>, on 02/01/22
    at 12:27 AM, "Lewis G Rosenthal" <gnuports@2rosenthals.com> said:

Hi Lewis,

How snowed in are you?

I'm using gcc 9.2.0. I wonder if I should try building with a different
gcc,  and if the behavior is different (different=does not require a full
path to  the library), perhaps a bug report is in order?

I doubt that's going to do anything helpful in this case.  To see the
buitin specs, use:

   gcc -dumpspecs

Search for pthreads and compare what the option provides to what the link
says is provided on other platforms.  We support -pthread, but not
-pthreads.  It is somewhat interesting that considering the age of this
link, our gcc's have never supported the -pthreads option.