Compiles again, now with bootstrap-layer print implemented, but not yet tested.

To get print implemented, I also had to implement a lot of other things.

src/c/payloads/integer.c

@@ -0,0 +1,39 @@
+/**
+ *  payloads/integer.c
+ *
+ *  An integer. Doctrine here is that we are not implementing bignum arithmetic in
+ *  the bootstrap layer; an integer is, for now, just a 64 bit integer.
+ *
+ *  (c) 2026 Simon Brooke <simon@journeyman.cc>
+ *  Licensed under GPL version 2.0, or, at your option, any later version.
+ */
+
+#include <stdint.h>
+
+#include "memory/node.h"
+#include "memory/pointer.h"
+#include "memory/pso.h"
+#include "memory/pso2.h"
+#include "memory/tags.h"
+
+#include "debug.h"
+
+/**
+ * Allocate an integer cell representing this `value` and return a pso_pointer to it.
+ * @param value an integer value;
+ * @param more `nil`, or a pointer to the more significant cell(s) of this number.
+ * *NOTE* that if `more` is not `nil`, `value` *must not* exceed `MAX_INTEGER`.
+ */
+struct pso_pointer make_integer( int64_t value ) {
+    struct pso_pointer result = nil;
+    debug_print( L"Entering make_integer\n", DEBUG_ALLOC , 0);
+
+	result = allocate( INTEGERTAG, 2);
+	struct pso2 *cell = pointer_to_object( result );
+	cell->payload.integer.value = value;
+
+    debug_print( L"make_integer: returning\n", DEBUG_ALLOC , 0);
+    debug_dump_object( result, DEBUG_ALLOC, 0 );
+
+    return result;
+}