clang -O2   -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations signal/sigaltstack.c -o signal/sigaltstack -D_POSIX_C_SOURCE=202405L  -lm   -lintl
../out/minix/include/signal/sigaltstack.o:(.data+0x0): undefined reference to `__sigaltstack14'
clang: error: linker command failed with exit code 1 (use -v to see invocation)