Configure/disfigure src_root saving/removing support; fsdir{} injection

We can now build out-of-tree.

1 files changed, 6 insertions, 4 deletions

diff --git a/build/config/module.cxx b/build/config/module.cxx
index dca6ede..41c2526 100644
--- a/build/config/module.cxx
+++ b/build/config/module.cxx
@@ -28,15 +28,17 @@ namespace build
     void
     init (scope& root, scope& base, const location& l)
     {
-      tracer trace ("config::init");
-
       //@@ TODO: avoid multiple inits (generally, for modules).
       //
-      level4 ([&]{trace << "for " << root.path () << '/';});
+
+      tracer trace ("config::init");
 
       if (&root != &base)
         fail (l) << "config module must be initialized in project root scope";
 
+      const path& out_root (root.path ());
+      level4 ([&]{trace << "for " << out_root << '/';});
+
       // Register meta-operations.
       //
       if (root.meta_operations.insert (configure) != configure_id ||
@@ -45,7 +47,7 @@ namespace build
 
       // Register the build/config.build sourcing trigger.
       //
-      root.triggers[path ("build/config.build")] = &trigger;
+      root.triggers[out_root / path ("build/config.build")] = &trigger;
     }
   }
 }