Add config.bin.target var/hint, use to decide libso{} install mode

Normally the user doesn't need to specify config.bin.target explicitly
since the cxx module will hint it. We now also have the whole set of
target's components:

bin.target.{cpu,vendor,system,version,class}

1 files changed, 1 insertions, 1 deletions

diff --git a/build2/variable.cxx b/build2/variable.cxx
index fdee0dd..17a9d52 100644
--- a/build2/variable.cxx
+++ b/build2/variable.cxx
@@ -694,7 +694,7 @@ namespace build2
   }
 
   pair<reference_wrapper<value>, bool> variable_map::
-  assign (const variable& var)
+  insert (const variable& var)
   {
     auto r (m_.emplace (var, value (var.type)));
     value& v (r.first->second);