diff -urp slock-0.9.orig/config.mk slock-0.9/config.mk
--- slock-0.9.orig/config.mk	2008-07-29 22:22:46.000000000 +0400
+++ slock-0.9/config.mk	2009-03-16 10:52:56.000000000 +0300
@@ -15,8 +15,8 @@ LIBS = -L/usr/lib -lc -lcrypt -L${X11LIB
 
 # flags
 CPPFLAGS = -DVERSION=\"${VERSION}\" -DHAVE_SHADOW_H
-CFLAGS = -std=c99 -pedantic -Wall -Os ${INCS} ${CPPFLAGS}
-LDFLAGS = -s ${LIBS}
+CFLAGS = ${RPM_OPT_FLAGS} ${INCS} ${CPPFLAGS}
+LDFLAGS = ${LIBS}
 
 # On *BSD remove -DHAVE_SHADOW_H from CPPFLAGS and add -DHAVE_BSD_AUTH
 # On OpenBSD and Darwin remove -lcrypt from LIBS