...

src/runtime/entry.s

@@ -0,0 +1,12 @@
+.intel_syntax noprefix
+
+.equ SYS_EXIT, 60
+
+.text
+.globl _start
+_start:
+    mov rdi, rsp
+    call main
+    mov rdi, rax
+    mov rax, SYS_EXIT
+    syscall

src/runtime/runtime.c

@@ -0,0 +1,17 @@
+#include <stdint.h>
+
+#define NUB_PANIC_ERROR_CODE 101
+
+uint64_t nub_cstring_length() { return 0; }
+
+uint64_t nub_string_length() {}
+
+void nub_memcpy() {}
+
+void nub_memset() {}
+
+void nub_panic() {}
+
+void nub_panic_array_oob() {}
+
+void nub_panic_oom() {}