Add support for rule-specific variables, use to fix cc.type data race

1 files changed, 6 insertions, 2 deletions

diff --git a/build2/dump.hxx b/build2/dump.hxx
index 74ecbe7..e9a3b30 100644
--- a/build2/dump.hxx
+++ b/build2/dump.hxx
@@ -8,15 +8,19 @@
 #include <build2/types.hxx>
 #include <build2/utility.hxx>
 
+#include <build2/action.hxx>
+
 namespace build2
 {
   class scope;
   class target;
 
-  // Dump the build state to diag_stream.
+  // Dump the build state to diag_stream. If action is specified, then assume
+  // rules have been matched for this action and dump action-specific
+  // information (like rule-specific variables).
   //
   void
-  dump ();
+  dump (optional<action> = nullopt);
 
   void
   dump (const scope&, const char* ind = "");