diff -r -u graphviz-2.38.0/cmd/tools/Makefile.am src/cmd/tools/Makefile.am
--- graphviz-2.38.0/cmd/tools/Makefile.am	2014-04-13 13:40:25.000000000 -0700
+++ src/cmd/tools/Makefile.am	2016-04-09 09:34:27.178979677 -0700
@@ -135,6 +135,7 @@
 gc_SOURCES = gc.c
 
 gc_LDADD = \
+	$(top_builddir)/lib/common/libcommon_C.la \
 	$(top_builddir)/lib/ingraphs/libingraphs_C.la \
 	$(top_builddir)/lib/cgraph/libcgraph.la
 
Only in src/cmd/tools: Makefile.am~
diff -r -u graphviz-2.38.0/cmd/tools/Makefile.in src/cmd/tools/Makefile.in
--- graphviz-2.38.0/cmd/tools/Makefile.in	2014-04-13 13:41:53.000000000 -0700
+++ src/cmd/tools/Makefile.in	2016-04-09 09:35:23.858509449 -0700
@@ -722,6 +722,7 @@
 
 gc_SOURCES = gc.c
 gc_LDADD = \
+	$(top_builddir)/lib/common/libcommon_C.la \
 	$(top_builddir)/lib/ingraphs/libingraphs_C.la \
 	$(top_builddir)/lib/cgraph/libcgraph.la
 
Only in src/cmd/tools: Makefile.in~