Debian ICU packages does not ship a .pc file
Index: adminutil-1.1.8/adminutil.pc.in
===================================================================
--- adminutil-1.1.8.orig/adminutil.pc.in	2010-05-23 22:50:47.000000000 +0200
+++ adminutil-1.1.8/adminutil.pc.in	2010-05-23 22:51:06.000000000 +0200
@@ -6,6 +6,6 @@
 Name: @PACKAGE_NAME@
 Description: Utility library for directory server administration
 Version: @PACKAGE_VERSION@
-Requires: nspr, nss, svrcore, mozldap, icu
+Requires: nspr, nss, svrcore, mozldap
 Libs: -ladmsslutil -ladminutil
 Cflags: -I${includedir}/admsslutil -I${includedir}/adminutil
