I'm trying to compile a program that I've been able to compile on several other Debian environments with no issues using the C11 <threads.h> library on a relatively fresh install of Debian Bullseye with "gcc (Debian 10.2.1-6) 10.2.1 20210110" installed
with the command
gcc -o <progname> -O3 -Wall -Wextra -std=c11 -lpthread <sourcefile>
and I'm getting a string of linker errors in the form of
undefined reference to 'mtx_unlock'
as well as mtx_lock mtx_init thrd_create etc.
But I'm not getting an error saying the threads.h file is absent. I tried removing the -lpthread argument from the compilation command but this changed nothing.
What is going wrong?
