X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Ftool.h;h=6aee38b2ee6a59b62206c0f8617dd7e5df6cf590;hb=1324d8e99c6fa3fa11db1a90fb0b9fc23c490247;hp=3c3757fe794549365851170b6b1e461a1998fd74;hpb=0368a9c1972ff5fd6cd8984901ff0bdbd86afc9f;p=builder.git

diff --git a/source/tool.h b/source/tool.h
index 3c3757f..6aee38b 100644
--- 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;