Add transitive dependencies for source files

[builder.git] / source / target.h

diff --git a/source/target.h b/source/target.h
index 6b9cc90a0842de77c845982a1f6462d7c107caf6..64a132c9f13a0460f8608695cb632b88f3ed5522 100644 (file)
--- a/source/target.h
+++ b/source/target.h
@@ -17,6 +17,11 @@ class Tool;
 /**
 Targets make up the build graph.  This class is a base for all target types and
 handles many common tasks.  See also FileTarget and VirtualTarget.
+
+Targets can depend on other targets.  There are two kinds of dependencies:
+normal and transitive.  Normal dependencies will need to be built before the
+target itself, and will cause the target to be rebuilt if modified.  Transitive
+dependencies can be used by other targets further down the chain.
 */
 class Target
 {
@@ -49,6 +54,7 @@ protected:
        std::list<std::string> problems;
 
        Dependencies depends;
+       Dependencies trans_depends;
        Dependencies side_effects;
        Target *primary_target;
 
@@ -66,6 +72,8 @@ public:
        this won't be detected until the targets are prepared. */
        void add_dependency(Target &);
 
+       void add_transitive_dependency(Target &);
+
        /** Adds a side effect for the target.  Side effects are not built on their
        own, but together with their primary target. */
        void add_side_effect(Target &);
@@ -80,6 +88,8 @@ public:
        /// Returns the dependencies of the target, in the order they were added.
        const Dependencies &get_dependencies() const { return depends; }
 
+       const Dependencies &get_transitive_dependencies() const { return trans_depends; }
+
        /// Returns the side effects of the target.
        const Dependencies &get_side_effects() const { return side_effects; }