--- ./unix/configure.orig	2009-04-16 14:25:12.000000000 -0500
+++ ./unix/configure	2013-09-12 13:32:24.274604436 -0500
@@ -640,7 +640,24 @@
     D_USE_BZ2="-DUSE_BZIP2"
     L_BZ2="${BZLF} -lbz2"
   else
-    echo "-- bzip2 sources not found - no bzip2 support"
+    echo "  Check if OS already has bzip2 library installed"
+    cat > conftest.c << _EOF_
+#include "bzlib.h"
+int main()
+{
+  bz_stream strm;
+  BZ2_bzCompressEnd(&strm);
+  return 0;
+}
+_EOF_
+    $CC $CFLAGS -o conftest conftest.c -lbz2 > /dev/null 2>/dev/null
+    if test $? -eq 0; then
+      echo "-- OS supports bzip2 - linking in bzip2"
+      D_USE_BZ2="-DUSE_BZIP2"
+      L_BZ2="${BZLF} -lbz2"
+    else
+      echo "-- Either bzlib.h or libbz2.a not found - no bzip2"
+    fi
   fi
 fi