Mildly working build process with argument parsing

lib/xalloc.c

@@ -0,0 +1,44 @@
+#include "xalloc.h"
+#include "../lib/logger.h"
+
+#include <stdlib.h>
+
+void die() __attribute__((noreturn));
+
+void* xcalloc(size_t count, size_t size)
+{
+	void* res = calloc(count, size);
+	if (res == NULL) {
+		die();
+	}
+	return res;
+}
+
+void xfree(void *ptr)
+{
+	free(ptr);
+}
+
+void* xmalloc(size_t size)
+{
+	void* res = malloc(size);
+	if (res == NULL) {
+		die();
+	}
+	return res;
+}
+
+void* xrealloc(void *ptr, size_t size)
+{
+	void* res = realloc(ptr, size);
+	if (res == NULL) {
+		die();
+	}
+	return res;
+}
+
+void die()
+{
+	log_fatal("zmap", "Out of memory");
+}
+

lib/xalloc.h

@@ -0,0 +1,14 @@
+#ifndef ZMAP_ALLOC_H
+#define ZMAP_ALLOC_H
+
+#include <stddef.h>
+
+void* xcalloc(size_t count, size_t size);
+
+void xfree(void *ptr);
+
+void* xmalloc(size_t size);
+
+void* xrealloc(void *ptr, size_t size);
+
+#endif