Make tarballs work again

[builder.git] / source / tool.h

diff --git a/source/tool.h b/source/tool.h
index 3c3757fe794549365851170b6b1e461a1998fd74..6aee38b2ee6a59b62206c0f8617dd7e5df6cf590 100644 (file)
--- a/source/tool.h
+++ b/source/tool.h
@@ -7,6 +7,7 @@
 
 class Architecture;
 class Builder;
+class BuildInfo;
 class Component;
 class FileTarget;
 class Target;
@@ -73,6 +74,8 @@ public:
        alternative target type for tools that can create multiple kinds of targets. */ 
        virtual Target *create_target(const std::list<Target *> &, const std::string & = std::string()) const = 0;
 
+       virtual std::string create_build_signature(const BuildInfo &) const { return std::string(); }
+
        /** Invokes the tool to build a target.  This should not be called directly;
        use Target::build() instead. */
        virtual Task *run(const Target &) const = 0;