try a little bit more flags for finding -lfl

glimpse/glimpse.spec

@@ -33,7 +33,7 @@ Distribution: OpenPKG [PRIV]
 Group:        Text
 License:      Commercial/Non-Profit
 Version:      4.16.2
-Release:      20020820
+Release:      20020821
 
 #   list of sources
 Source0:      http://www.webglimpse.net/allusers/glimpse-%{version}.tar.gz
@@ -59,6 +59,8 @@ AutoReqProv:  no
 %build
     CC="%{l_cc}" \
     CFLAGS="%{l_cflags -O}" \
+    CPPFLAGS="%{l_cppflags}" \
+    LDFLAGS="%{l_ldflags}" \
     ./configure \
         --prefix=%{l_prefix}
     %{l_make} %{l_mflags}