--- Makefile.am.link	2012-01-16 22:06:58.768919983 +0800
+++ Makefile.am	2012-01-16 22:08:48.637359769 +0800
@@ -35,6 +35,7 @@
 	-release $(LT_RELEASE)	\
 	-version-info $(LT_CURRENT):$(LT_REVISION):$(LT_AGE)
 endif
+libSDL_ttf_la_LIBADD = -lm
 
 pkgconfigdir = $(libdir)/pkgconfig
 pkgconfig_DATA = SDL_ttf.pc
--- Makefile.in.link	2012-01-16 22:08:11.498922382 +0800
+++ Makefile.in	2012-01-16 22:08:24.347363560 +0800
@@ -68,7 +68,7 @@
 	"$(DESTDIR)$(libSDL_ttfincludedir)"
 libLTLIBRARIES_INSTALL = $(INSTALL)
 LTLIBRARIES = $(lib_LTLIBRARIES)
-libSDL_ttf_la_LIBADD =
+libSDL_ttf_la_LIBADD = -lm
 am_libSDL_ttf_la_OBJECTS = SDL_ttf.lo
 libSDL_ttf_la_OBJECTS = $(am_libSDL_ttf_la_OBJECTS)
 libSDL_ttf_la_LINK = $(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) \