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bdca8b01d2
#pragma once is a widely supported compiler pragma, even though it is not part of the C++ standard. Many of the issues keeping #pragma once from being standardized (distributed filesystems, build farms, hard links, etc.) do not apply to CMake - it is easy to build CMake on a single machine. CMake also does not install any header files which can be consumed by other projects (though cmCPluginAPI.h has been deliberately omitted from this conversion in case anyone is still using it.) Finally, #pragma once has been required to build CMake since at least August 2017 (7f29bbe6enabled server mode unconditionally, which had been using #pragma once since September 2016 (b13d3e0d)). The fact that we now require C++11 filters out old compilers, and it is unlikely that there is a compiler which supports C++11 but does not support #pragma once.
107 lines
3.8 KiB
C++
107 lines
3.8 KiB
C++
/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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file Copyright.txt or https://cmake.org/licensing for details. */
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#pragma once
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#include "cmConfigure.h" // IWYU pragma: keep
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#include <map>
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#include <set>
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#include <string>
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#include <vector>
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#include "cmGraphAdjacencyList.h"
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#include "cmListFileCache.h"
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class cmComputeComponentGraph;
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class cmGeneratorTarget;
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class cmGlobalGenerator;
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class cmLinkItem;
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class cmTargetDependSet;
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/** \class cmComputeTargetDepends
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* \brief Compute global interdependencies among targets.
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*
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* Static libraries may form cycles in the target dependency graph.
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* This class evaluates target dependencies globally and adjusts them
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* to remove cycles while preserving a safe build order.
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*/
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class cmComputeTargetDepends
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{
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public:
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cmComputeTargetDepends(cmGlobalGenerator* gg);
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~cmComputeTargetDepends();
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bool Compute();
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std::vector<cmGeneratorTarget const*> const& GetTargets() const
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{
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return this->Targets;
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}
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void GetTargetDirectDepends(cmGeneratorTarget const* t,
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cmTargetDependSet& deps);
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private:
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struct TargetSideEffects
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{
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std::set<cmGeneratorTarget const*> CustomCommandSideEffects;
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std::map<std::string, std::set<cmGeneratorTarget const*>>
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LanguageSideEffects;
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};
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void CollectTargets();
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void CollectDepends();
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void CollectTargetDepends(int depender_index);
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void AddTargetDepend(int depender_index, cmLinkItem const& dependee_name,
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bool linking, bool cross);
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void AddTargetDepend(int depender_index, cmGeneratorTarget const* dependee,
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cmListFileBacktrace const& dependee_backtrace,
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bool linking, bool cross);
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void CollectSideEffects();
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void CollectSideEffectsForTarget(std::set<int>& visited, int depender_index);
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void ComputeIntermediateGraph();
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void OptimizeLinkDependencies(cmGeneratorTarget const* gt,
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cmGraphEdgeList& outputEdges,
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cmGraphEdgeList const& inputEdges);
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bool ComputeFinalDepends(cmComputeComponentGraph const& ccg);
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void AddInterfaceDepends(int depender_index, cmLinkItem const& dependee_name,
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const std::string& config,
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std::set<cmLinkItem>& emitted);
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void AddInterfaceDepends(int depender_index,
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cmGeneratorTarget const* dependee,
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cmListFileBacktrace const& dependee_backtrace,
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const std::string& config,
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std::set<cmLinkItem>& emitted);
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cmGlobalGenerator* GlobalGenerator;
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bool DebugMode;
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bool NoCycles;
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// Collect all targets.
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std::vector<cmGeneratorTarget const*> Targets;
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std::map<cmGeneratorTarget const*, int> TargetIndex;
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// Represent the target dependency graph. The entry at each
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// top-level index corresponds to a depender whose dependencies are
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// listed.
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using NodeList = cmGraphNodeList;
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using EdgeList = cmGraphEdgeList;
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using Graph = cmGraphAdjacencyList;
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Graph InitialGraph;
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Graph IntermediateGraph;
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Graph FinalGraph;
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std::vector<TargetSideEffects> SideEffects;
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void DisplayGraph(Graph const& graph, const std::string& name);
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void DisplaySideEffects();
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// Deal with connected components.
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void DisplayComponents(cmComputeComponentGraph const& ccg,
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const std::string& name);
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bool CheckComponents(cmComputeComponentGraph const& ccg);
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void ComplainAboutBadComponent(cmComputeComponentGraph const& ccg, int c,
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bool strong = false);
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std::vector<int> ComponentHead;
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std::vector<int> ComponentTail;
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bool IntraComponent(std::vector<int> const& cmap, int c, int i, int* head,
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std::set<int>& emitted, std::set<int>& visited);
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};
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