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