cc -O2 -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations stdatomic/atomic_flag_test_and_set.c -o stdatomic/atomic_flag_test_and_set -D_POSIX_C_SOURCE=202405L  -lm -lpthread -lrt  -lintl -lcrypt
ld: ../out/netbsd/include/stdatomic/atomic_flag_test_and_set.o:(.data+0x0): undefined reference to `atomic_flag_test_and_set'