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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 (7f29bbe6 enabled 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.
97 lines
3.4 KiB
C++
97 lines
3.4 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 <memory>
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#include <set>
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#include <string>
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#include <utility>
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#include <vector>
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#include "cmsys/RegularExpression.hxx"
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class cmGeneratorTarget;
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class cmGlobalGenerator;
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class cmOrderDirectoriesConstraint;
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/** \class cmOrderDirectories
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* \brief Compute a safe runtime path order for a set of shared libraries.
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*/
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class cmOrderDirectories
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{
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public:
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cmOrderDirectories(cmGlobalGenerator* gg, cmGeneratorTarget const* target,
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const char* purpose);
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~cmOrderDirectories();
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cmOrderDirectories(const cmOrderDirectories&) = delete;
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cmOrderDirectories& operator=(const cmOrderDirectories&) = delete;
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void AddRuntimeLibrary(std::string const& fullPath,
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const char* soname = nullptr);
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void AddLinkLibrary(std::string const& fullPath);
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void AddUserDirectories(std::vector<std::string> const& extra);
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void AddLanguageDirectories(std::vector<std::string> const& dirs);
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void SetImplicitDirectories(std::set<std::string> const& implicitDirs);
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void SetLinkExtensionInfo(std::vector<std::string> const& linkExtensions,
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std::string const& removeExtRegex);
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std::vector<std::string> const& GetOrderedDirectories();
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private:
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cmGlobalGenerator* GlobalGenerator;
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cmGeneratorTarget const* Target;
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std::string Purpose;
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std::vector<std::string> OrderedDirectories;
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std::vector<std::unique_ptr<cmOrderDirectoriesConstraint>> ConstraintEntries;
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std::vector<std::unique_ptr<cmOrderDirectoriesConstraint>>
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ImplicitDirEntries;
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std::vector<std::string> UserDirectories;
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std::vector<std::string> LanguageDirectories;
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cmsys::RegularExpression RemoveLibraryExtension;
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std::vector<std::string> LinkExtensions;
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std::set<std::string> ImplicitDirectories;
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std::set<std::string> EmmittedConstraintSOName;
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std::set<std::string> EmmittedConstraintLibrary;
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std::vector<std::string> OriginalDirectories;
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std::map<std::string, int> DirectoryIndex;
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std::vector<int> DirectoryVisited;
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void CollectOriginalDirectories();
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int AddOriginalDirectory(std::string const& dir);
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void AddOriginalDirectories(std::vector<std::string> const& dirs);
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void FindConflicts();
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void FindImplicitConflicts();
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void OrderDirectories();
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void VisitDirectory(unsigned int i);
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void DiagnoseCycle();
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int WalkId;
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bool CycleDiagnosed;
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bool Computed;
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// Adjacency-list representation of runtime path ordering graph.
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// This maps from directory to those that must come *before* it.
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// Each entry that must come before is a pair. The first element is
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// the index of the directory that must come first. The second
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// element is the index of the runtime library that added the
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// constraint.
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using ConflictPair = std::pair<int, int>;
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struct ConflictList : public std::vector<ConflictPair>
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{
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};
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std::vector<ConflictList> ConflictGraph;
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// Compare directories after resolving symlinks.
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bool IsSameDirectory(std::string const& l, std::string const& r);
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bool IsImplicitDirectory(std::string const& dir);
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std::string const& GetRealPath(std::string const& dir);
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std::map<std::string, std::string> RealPaths;
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friend class cmOrderDirectoriesConstraint;
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friend class cmOrderDirectoriesConstraintLibrary;
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};
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