Add replacement library files

lib/xmalloc.c

@@ -0,0 +1,21 @@
+/*
+ * xmalloc.c
+ *
+ * Simple error-checking version of malloc()
+ *
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+
+void *xmalloc(size_t size)
+{
+  void *p = malloc(size);
+
+  if ( !p ) {
+    fprintf(stderr, "Out of memory!\n");
+    exit(128);
+  }
+
+  return p;
+}