From a84ff43b183181e0a12c6d5e31c1f366d39ce2fe Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Mon, 31 Jul 2017 18:42:47 +0200
Subject: Experimental (and probably broken) pkg-config generation support

---
 build2/target.hxx | 27 ++++++++++++++++++++++++---
 1 file changed, 24 insertions(+), 3 deletions(-)

(limited to 'build2/target.hxx')

diff --git a/build2/target.hxx b/build2/target.hxx
index 7cc7f95..3af533f 100644
--- a/build2/target.hxx
+++ b/build2/target.hxx
@@ -250,7 +250,8 @@ namespace build2
     // - Member variable lookup skips the ad hoc group (since the group is
     //   the first member, this is normally what we want).
     //
-    // Use add_adhoc_member() from algorithms to add an ad hoc member.
+    // Use add_adhoc_member(), find_adhoc_member() from algorithms to manage
+    // ad hoc members.
     //
     const_ptr<target> member = nullptr;
 
@@ -1686,8 +1687,8 @@ namespace build2
     virtual const target_type& dynamic_type () const {return static_type;}
   };
 
-  // Common implementation of the target factory, extension, and
-  // search functions.
+  // Common implementation of the target factory, extension, and search
+  // functions.
   //
   template <typename T>
   pair<target*, optional<string>>
@@ -1700,6 +1701,26 @@ namespace build2
     return make_pair (new T (move (d), move (o), move (n)), move (e));
   }
 
+  template <typename T, const char* ext>
+  static pair<target*, optional<string>>
+  file_factory (const target_type& tt,
+                dir_path d,
+                dir_path o,
+                string n,
+                optional<string> e)
+  {
+    // A generic file target type doesn't imply any extension while a very
+    // specific one (say man1) may have a fixed extension. So if one wasn't
+    // specified and this is not a dynamically derived target type, then set
+    // it to fixed ext rather than unspecified. For file{} itself we make it
+    // empty which means we treat file{foo} as file{foo.}.
+    //
+    if (!e && ext != nullptr && tt.factory == &file_factory<T, ext>)
+      e = string (ext);
+
+    return make_pair (new T (move (d), move (o), move (n)), move (e));
+  }
+
   // Return fixed target extension.
   //
   template <const char* ext>
-- 
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