--- configure.in.orig	2009-09-09 21:18:25.000000000 +0100
+++ configure.in	2009-09-09 21:18:43.000000000 +0100
@@ -7,4 +7,5 @@
 AC_C_CONST
 AC_HEADER_TIME
 AC_CHECK_FUNCS(gettimeofday)
+AC_CHECK_LIB(m, sin)
 AC_OUTPUT(Makefile src/Makefile src/include/Makefile fann.pc fann.spec)