http://bugzilla.xfce.org/show_bug.cgi?id=8229

Fix underlinking. See below. Function "floor" and math.h is used in common.c which is part of libdict.

/path/to/ld: ../lib/.libs/libdict.a(libdict_la-common.o): undefined reference to symbol 'floor@@GLIBC_2.2.5'
/path/to/ld: note: 'floor@@GLIBC_2.2.5' is defined in DSO /lib64/libm.so.6 so try adding it to the linker command line
/lib/libm.so.6: could not read symbols: Invalid operation
collect2: ld returned 1 exit status

--- lib/Makefile.am
+++ lib/Makefile.am
@@ -34,7 +34,8 @@
 libdict_la_LIBADD =								\
 	$(LIBXFCE4PANEL_LIBS)						\
 	$(LIBXFCEGUI4_LIBS)							\
-	@GTHREAD_LIBS@
+	@GTHREAD_LIBS@								\
+	-lm
 
 
 noinst_DATA = 									\