Add $config.export() function

This is similar to the config.export variable functionality except it can be
called from within buildfiles.

Note that this function can only be used during configure unless the config
module creation was forced for other meta-operations with config.module=true
in bootstrap.build.

1 files changed, 1 insertions, 2 deletions

diff --git a/libbuild2/test/init.cxx b/libbuild2/test/init.cxx
index 5681b37..af112fb 100644
--- a/libbuild2/test/init.cxx
+++ b/libbuild2/test/init.cxx
@@ -137,8 +137,7 @@ namespace build2
         return true;
       }
 
-      const dir_path& out_root (rs.out_path ());
-      l5 ([&]{trace << "for " << out_root;});
+      l5 ([&]{trace << "for " << rs;});
 
       assert (mod != nullptr);
       module& m (static_cast<module&> (*mod));