Add abstract c_inc{} and cxx_inc{} target types

These abstract base target types are meant for deriving additional target
types (for example, Qt moc{}) that can be #include'd in C and C++ translation
units, respectively. In particular, only such targets will be considered to
reverse-lookup extensions to target types (see dyndep_rule::map_extension()
for background).

1 files changed, 13 insertions, 0 deletions

diff --git a/libbuild2/cxx/target.cxx b/libbuild2/cxx/target.cxx
index 5ead620..37096c3 100644
--- a/libbuild2/cxx/target.cxx
+++ b/libbuild2/cxx/target.cxx
@@ -90,5 +90,18 @@ namespace build2
       &file_search,
       target_type::flag::none
     };
+
+    const target_type cxx_inc::static_type
+    {
+      "cxx_inc",
+      &cc::static_type,
+      nullptr,
+      nullptr,
+      nullptr,
+      nullptr,
+      nullptr,
+      &target_search,
+      target_type::flag::none
+    };
   }
 }