diff -pur speech_tools-orig/config/rules/defaults.mak speech_tools/config/rules/defaults.mak
--- speech_tools-orig/config/rules/defaults.mak	2001-04-04 13:55:32.000000000 +0200
+++ speech_tools/config/rules/defaults.mak	2018-03-14 07:57:50.330139925 +0100
@@ -196,6 +196,6 @@ endif
 ## Link a program (not including libraries)
 
 ifndef LINK_COMMAND
-    LINK_COMMAND = $(CXX) $(LINKFLAGS) $(TEMPLATES) 
+    LINK_COMMAND = $(CXX) $(LINKFLAGS) $(OS_LIBS) $(TEMPLATES) 
 endif
 
Only in speech_tools/config/rules: defaults.mak.orig