Rework extension handling logic

We no longer support hxx{vector.}. Rather, the target type can decide,
e.g., based on a config variable, whether to append an extension. Also,
in the future we may support a syntax to specify that this is a complete
name, e.g., hxx{'vector'}.

1 files changed, 1 insertions, 1 deletions

diff --git a/build/prerequisite.cxx b/build/prerequisite.cxx
index 8d86392..71bde5f 100644
--- a/build/prerequisite.cxx
+++ b/build/prerequisite.cxx
@@ -46,7 +46,7 @@ namespace build
 
       os << p.name;
 
-      if (p.ext != nullptr)
+      if (p.ext != nullptr && !p.ext->empty ())
         os << '.' << *p.ext;
 
       os << '}';