diff -ur wavbreaker-0.10.orig/configure.in wavbreaker-0.10/configure.in
--- wavbreaker-0.10.orig/configure.in	2008-06-02 09:44:27.000000000 +0300
+++ wavbreaker-0.10/configure.in	2008-06-14 15:28:26.000000000 +0300
@@ -30,6 +30,7 @@
 AC_PROG_CC
 AC_PROG_INSTALL
 AC_PROG_LN_S
+PKG_PROG_PKG_CONFIG
 
 # Checks for libraries.
 AC_CHECK_LIB([m], [cos])