clang -O2  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations signal/pthread_sigmask.c -o signal/pthread_sigmask -D_POSIX_C_SOURCE=202405L  -lm  -lintl
../out/minix/include/signal/pthread_sigmask.o:(.data+0x0): undefined reference to `pthread_sigmask'
clang: error: linker command failed with exit code 1 (use -v to see invocation)