diff -Naur gts-0.7.6/src/Makefile.am gts-0.7.6.tpg/src/Makefile.am
--- gts-0.7.6/src/Makefile.am	2005-01-19 04:48:22.000000000 +0000
+++ gts-0.7.6.tpg/src/Makefile.am	2009-02-11 10:44:29.000000000 +0000
@@ -15,6 +15,8 @@
 libgts_la_LDFLAGS = -version-info $(LT_CURRENT):$(LT_REVISION):$(LT_AGE)\
 	-release $(LT_RELEASE) -export-dynamic
 
+libgts_la_LIBADD = -lm
+
 libgts_la_DEPENDENCIES = \
 	predicates_init.h