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diff --git a/lib/art/gen_art_config.c b/lib/art/gen_art_config.c
new file mode 100644
index 0000000..8d88815
--- /dev/null
+++ b/lib/art/gen_art_config.c
@@ -0,0 +1,52 @@
+#include <stdio.h>
+#include "config.h"
+#include <stdlib.h>
+
+/**
+ * A little utility function to generate header info.
+ *
+ * Yes, it would be possible to do this using more "native" autoconf
+ * features, but I personally find this approach to be cleaner.
+ *
+ * The output of this program is generally written to art_config.h,
+ * which is installed in libart's include dir.
+ **/
+
+static void
+die (char *why)
+{
+  fprintf (stderr, "gen_art_config: %s\n", why);
+  exit (1);
+}
+
+int
+main (int argc, char **argv)
+{
+  printf ("/* Automatically generated by gen_art_config.c */\n"
+	  "\n"
+	  "#define ART_SIZEOF_CHAR %d\n"
+	  "#define ART_SIZEOF_SHORT %d\n"
+	  "#define ART_SIZEOF_INT %d\n"
+	  "#define ART_SIZEOF_LONG %d\n"
+	  "\n",
+	  (int)sizeof(char), (int)sizeof(short), (int)sizeof(int), (int)sizeof(long));
+
+  if (sizeof(char) == 1)
+    printf ("typedef unsigned char art_u8;\n");
+  else
+    die ("sizeof(char) != 1");
+
+  if (sizeof(short) == 2)
+    printf ("typedef unsigned short art_u16;\n");
+  else
+    die ("sizeof(short) != 2");
+
+  if (sizeof(int) == 4)
+    printf ("typedef unsigned int art_u32;\n");
+  else if (sizeof(long) == 4)
+    printf ("typedef unsigned long art_u32;\n");
+  else
+    die ("sizeof(int) != 4 and sizeof(long) != 4");
+
+  return 0;
+}