diff -Naur a/parse.c b/parse.c
--- a/parse.c	2023-09-22 19:07:10.453654092 -0400
+++ b/parse.c	2023-09-22 19:07:20.410630094 -0400
@@ -965,16 +965,6 @@
   }
 }
 
-char *memmem (char *haystack, size_t haystacklen,
-              char *needle, size_t needlelen)
-{
-  char *c;
-  for (c = haystack; c <= haystack + haystacklen - needlelen; c++)
-    if (!memcmp (c, needle, needlelen))
-      return c;
-  return NULL;
-}
-
 /*
    Identify which camera created this file, and set global variables
    accordingly.	 Return nonzero if the file cannot be decoded.