--- zip30/unix/configure	2008-06-19 23:32:20.000000000 +0000
+++ zip30/unix/configure	2012-09-18 02:05:09.176402799 +0000
@@ -403,6 +403,10 @@ 
 # Added 11/4/2003 EG
 # Revised 8/12/2004 EG
 
+if test -n "${LARGEFILE_SUPPORTED}"; then
+   echo -- Assuming large files are supported
+   CFLAGS="${CFLAGS} -DLARGE_FILE_SUPPORT"
+else
 echo Check for Large File Support
 cat > conftest.c << _EOF_
 # define _LARGEFILE_SOURCE       /* some OSes need this for fseeko */
@@ -448,6 +452,7 @@ 
     echo -- no Large File Support - conftest returned $r
   fi
 fi
+fi
 
 
 # Check for wide char for Unicode support