diff -Naur ftgl-2.1.3~rc5.orig/test/Makefile.am ftgl-2.1.3~rc5/test/Makefile.am
--- ftgl-2.1.3~rc5.orig/test/Makefile.am	2008-06-02 03:10:10.000000000 +0200
+++ ftgl-2.1.3~rc5/test/Makefile.am	2012-04-01 06:59:36.523040292 +0200
@@ -52,7 +52,7 @@
 
 CXXTest_CXXFLAGS = $(FT2_CFLAGS) $(GL_CFLAGS)
 CXXTest_LDFLAGS = $(FT2_LIBS) $(GLUT_LIBS) -lcppunit
-CXXTest_LDADD = ../src/libftgl.la
+CXXTest_LDADD = ../src/libftgl.la -lm
 
 CTest_SOURCES = \
     CTest.c \