neatogen: add linking to cgraph

E.g. constraint.c uses agopen from lib/cgraph/graph.c.

This removes the need to link to cgraph for downstream libraries that
do not explicitly use cgraph.

diff --git a/lib/neatogen/CMakeLists.txt b/lib/neatogen/CMakeLists.txt
index 412b71d106b8454ff72be5e91bb89885d12b8ecb..722d413b1e305f4871de582deebf685dc74b0299 100644 (file)
--- a/lib/neatogen/CMakeLists.txt
+++ b/lib/neatogen/CMakeLists.txt
@@ -100,3 +100,7 @@ target_include_directories(neatogen PRIVATE
     ${GRAPHVIZ_LIB_DIR}/pack
     ${GRAPHVIZ_LIB_DIR}/pathplan
 )
+
+target_link_libraries(neatogen PRIVATE
+    cgraph
+)