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/*============================================================================
CMake - Cross Platform Makefile Generator
Copyright 2000-2009 Kitware, Inc., Insight Software Consortium
Distributed under the OSI-approved BSD License (the "License");
see accompanying file Copyright.txt for details.
This software is distributed WITHOUT ANY WARRANTY; without even the
implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the License for more information.
============================================================================*/
#ifndef cmComputeTargetDepends_h
#define cmComputeTargetDepends_h
#include "cmStandardIncludes.h"
#include "cmGraphAdjacencyList.h"
#include <stack>
class cmComputeComponentGraph;
class cmGlobalGenerator;
class cmTarget;
class cmTargetDependSet;
/** \class cmComputeTargetDepends
* \brief Compute global interdependencies among targets.
*
* Static libraries may form cycles in the target dependency graph.
* This class evaluates target dependencies globally and adjusts them
* to remove cycles while preserving a safe build order.
*/
class cmComputeTargetDepends
{
public:
cmComputeTargetDepends(cmGlobalGenerator* gg);
~cmComputeTargetDepends();
bool Compute();
std::vector<cmTarget*> const& GetTargets() const { return this->Targets; }
void GetTargetDirectDepends(cmTarget* t, cmTargetDependSet& deps);
private:
void CollectTargets();
void CollectDepends();
void CollectTargetDepends(int depender_index);
void AddTargetDepend(int depender_index, const char* dependee_name,
bool linking);
void AddTargetDepend(int depender_index, cmTarget* dependee, bool linking);
bool ComputeFinalDepends(cmComputeComponentGraph const& ccg);
cmGlobalGenerator* GlobalGenerator;
bool DebugMode;
bool NoCycles;
// Collect all targets.
std::vector<cmTarget*> Targets;
std::map<cmTarget*, int> TargetIndex;
// Represent the target dependency graph. The entry at each
// top-level index corresponds to a depender whose dependencies are
// listed.
typedef cmGraphNodeList NodeList;
typedef cmGraphEdgeList EdgeList;
typedef cmGraphAdjacencyList Graph;
Graph InitialGraph;
Graph FinalGraph;
void DisplayGraph(Graph const& graph, const char* name);
// Deal with connected components.
void DisplayComponents(cmComputeComponentGraph const& ccg);
bool CheckComponents(cmComputeComponentGraph const& ccg);
void ComplainAboutBadComponent(cmComputeComponentGraph const& ccg, int c,
bool strong = false);
std::vector<int> ComponentHead;
std::vector<int> ComponentTail;
bool IntraComponent(std::vector<int> const& cmap, int c, int i, int* head,
std::set<int>& emitted, std::set<int>& visited);
};
#endif
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