Day 1. Assembly code is being generated, on a monkey see, monkey do basis;

but it doesn't link because of a missing library; and having moved source
files around the Makefile currently doesn't work.

src/c/day1.c

@@ -0,0 +1,26 @@
+/**
+ *  day1.c
+ *
+ *  Grendel: a compiling Beowulf reimplementation.
+ *
+ *  Day 1 of work towards a compiler... eventually..
+ *
+ *  This is a straight copy of Noah Zentzis' work. There's no original work of
+ *  mine here, yet
+ *
+ *  (c) 2026 Simon Brooke <simon@journeyman.cc>
+ *  Licensed under GPL version 2.0, or, at your option, any later version.
+ */
+
+#include <stdio.h>
+#include <stdint.h>
+#include <string.h>
+
+__attribute__((__cdecl__))
+extern int lisp_entry();
+
+int main(int argc, const char **argv) {
+    int val = lisp_entry();
+    printf("%d\n", val);
+    return 0;
+}