Index: trunk/ppImage/configure.ac
===================================================================
--- trunk/ppImage/configure.ac	(revision 6902)
+++ trunk/ppImage/configure.ac	(revision 7508)
@@ -18,11 +18,12 @@
   [AS_HELP_STRING(--enable-optimize,enable compiler optimization)],
   [AC_MSG_RESULT(compile optimization enabled)
-   CFLAGS="${CFLAGS=} -O2"],
+   CFLAGS="-O2"],
   [AC_MSG_RESULT([compile optimization disabled])
-   CFLAGS="${CFLAGS=} -O0 -g"]
+   CFLAGS="-O0 -g"]
 )
 
 PKG_CHECK_MODULES([PSLIB], [pslib >= 0.9.0]) 
 PKG_CHECK_MODULES([PSMODULE], [psmodule >= 0.0.0]) 
+PKG_CHECK_MODULES([PSPHOT], [psphot >= 0.0.0]) 
 
 CFLAGS="${CFLAGS} -Wall -Werror -std=c99"