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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 cmComputeLinkDepends_h
#define cmComputeLinkDepends_h
#include "cmStandardIncludes.h"
#include "cmTarget.h"
#include "cmGraphAdjacencyList.h"
#include <queue>
class cmComputeComponentGraph;
class cmGlobalGenerator;
class cmLocalGenerator;
class cmMakefile;
class cmTarget;
class cmake;
/** \class cmComputeLinkDepends
* \brief Compute link dependencies for targets.
*/
class cmComputeLinkDepends
{
public:
cmComputeLinkDepends(cmTarget const* target, const std::string& config,
cmTarget const* head);
~cmComputeLinkDepends();
// Basic information about each link item.
struct LinkEntry
{
std::string Item;
cmTarget const* Target;
bool IsSharedDep;
bool IsFlag;
LinkEntry(): Item(), Target(0), IsSharedDep(false), IsFlag(false) {}
LinkEntry(LinkEntry const& r):
Item(r.Item), Target(r.Target), IsSharedDep(r.IsSharedDep),
IsFlag(r.IsFlag) {}
};
typedef std::vector<LinkEntry> EntryVector;
EntryVector const& Compute();
void SetOldLinkDirMode(bool b);
std::set<cmTarget const*> const& GetOldWrongConfigItems() const
{ return this->OldWrongConfigItems; }
private:
// Context information.
cmTarget const* Target;
cmTarget const* HeadTarget;
cmMakefile* Makefile;
cmLocalGenerator* LocalGenerator;
cmGlobalGenerator const* GlobalGenerator;
cmake* CMakeInstance;
bool DebugMode;
// Configuration information.
bool HasConfig;
std::string Config;
cmTarget::LinkLibraryType LinkType;
// Output information.
EntryVector FinalLinkEntries;
typedef cmTarget::LinkLibraryVectorType LinkLibraryVectorType;
std::map<std::string, int>::iterator
AllocateLinkEntry(std::string const& item);
int AddLinkEntry(int depender_index, std::string const& item);
void AddVarLinkEntries(int depender_index, const char* value);
void AddDirectLinkEntries();
void AddLinkEntries(int depender_index,
std::vector<std::string> const& libs);
cmTarget const* FindTargetToLink(int depender_index,
const std::string& name);
// One entry for each unique item.
std::vector<LinkEntry> EntryList;
std::map<std::string, int> LinkEntryIndex;
// BFS of initial dependencies.
struct BFSEntry
{
int Index;
const char* LibDepends;
};
std::queue<BFSEntry> BFSQueue;
void FollowLinkEntry(BFSEntry const&);
// Shared libraries that are included only because they are
// dependencies of other shared libraries, not because they are part
// of the interface.
struct SharedDepEntry
{
std::string Item;
int DependerIndex;
};
std::queue<SharedDepEntry> SharedDepQueue;
std::set<int> SharedDepFollowed;
void FollowSharedDeps(int depender_index,
cmTarget::LinkInterface const* iface,
bool follow_interface = false);
void QueueSharedDependencies(int depender_index,
std::vector<std::string> const& deps);
void HandleSharedDependency(SharedDepEntry const& dep);
// Dependency inferral for each link item.
struct DependSet: public std::set<int> {};
struct DependSetList: public std::vector<DependSet> {};
std::vector<DependSetList*> InferredDependSets;
void InferDependencies();
// Ordering constraint graph adjacency list.
typedef cmGraphNodeList NodeList;
typedef cmGraphEdgeList EdgeList;
typedef cmGraphAdjacencyList Graph;
Graph EntryConstraintGraph;
void CleanConstraintGraph();
void DisplayConstraintGraph();
// Ordering algorithm.
void OrderLinkEntires();
std::vector<char> ComponentVisited;
std::vector<int> ComponentOrder;
int ComponentOrderId;
struct PendingComponent
{
// The real component id. Needed because the map is indexed by
// component topological index.
int Id;
// The number of times the component needs to be seen. This is
// always 1 for trivial components and is initially 2 for
// non-trivial components.
int Count;
// The entries yet to be seen to complete the component.
std::set<int> Entries;
};
std::map<int, PendingComponent> PendingComponents;
cmComputeComponentGraph* CCG;
std::vector<int> FinalLinkOrder;
void DisplayComponents();
void VisitComponent(unsigned int c);
void VisitEntry(int index);
PendingComponent& MakePendingComponent(unsigned int component);
int ComputeComponentCount(NodeList const& nl);
void DisplayFinalEntries();
// Record of the original link line.
std::vector<int> OriginalEntries;
// Compatibility help.
bool OldLinkDirMode;
void CheckWrongConfigItem(int depender_index, std::string const& item);
std::set<cmTarget const*> OldWrongConfigItems;
};
#endif
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