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db44848f44
This patch makes include() and find_package() prefer cmake files located in CMAKE_ROOT over those in CMAKE_MODULE_PATH. This makes sure that the including file gets that file included which it expects, i.e. the one from cmake with which it was tested. It only changes behaviour when such an included file exists both in CMAKE_MODULE_PATH and in CMAKE_ROOT. This comes together with a new policy CMP0017, with default behaviour it behaves as it always did, but warns. With NEW behaviour it includes the file from CMAKE_ROOT instead from CMAKE_MODULE_PATH. This fixes (if CMP0017 is set) building KDE 4.5 with cmake >= 2.8.3. Also a basic test for this policy in included.
113 lines
4.2 KiB
C++
113 lines
4.2 KiB
C++
/*============================================================================
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CMake - Cross Platform Makefile Generator
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Copyright 2000-2009 Kitware, Inc., Insight Software Consortium
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Distributed under the OSI-approved BSD License (the "License");
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see accompanying file Copyright.txt for details.
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This software is distributed WITHOUT ANY WARRANTY; without even the
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implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the License for more information.
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============================================================================*/
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#ifndef cmPolicies_h
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#define cmPolicies_h
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#include "cmCustomCommand.h"
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class cmake;
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class cmMakefile;
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class cmPolicy;
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/** \class cmPolicies
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* \brief Handles changes in CMake behavior and policies
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*
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* See the cmake wiki section on policies for an overview of this class's
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* purpose
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*/
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class cmPolicies
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{
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public:
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cmPolicies();
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~cmPolicies();
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enum PolicyStatus { OLD, WARN, NEW, REQUIRED_IF_USED, REQUIRED_ALWAYS };
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static const char* PolicyStatusNames[];
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enum PolicyID
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{
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CMP0000, // Policy version specification
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CMP0001, // Ignore old compatibility variable
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CMP0002, // Target names must be unique
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CMP0003, // Linking does not include extra -L paths
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CMP0004, // Libraries linked may not have leading or trailing whitespace
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CMP0005, // Definition value escaping
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CMP0006, // BUNDLE install rules needed for MACOSX_BUNDLE targets
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CMP0007, // list command handling of empty elements
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CMP0008, // Full-path libraries must be a valid library file name
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CMP0009, // GLOB_RECURSE should not follow symlinks by default
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CMP0010, // Bad variable reference syntax is an error
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CMP0011, // Strong policy scope for include and find_package
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CMP0012, // Recognize numbers and boolean constants in if()
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CMP0013, // Duplicate binary directories not allowed
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CMP0014, // Input directories must have CMakeLists.txt
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CMP0015, // link_directories() treats paths relative to source dir
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CMP0016, // target_link_libraries() fails if only argument is not a target
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CMP0017, // Prefer files in CMAKE_ROOT when including from CMAKE_ROOT
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// Always the last entry. Useful mostly to avoid adding a comma
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// the last policy when adding a new one.
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CMPCOUNT
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};
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///! convert a string policy ID into a number
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bool GetPolicyID(const char *id, /* out */ cmPolicies::PolicyID &pid);
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std::string GetPolicyIDString(cmPolicies::PolicyID pid);
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///! Get the default status for a policy
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cmPolicies::PolicyStatus GetPolicyStatus(cmPolicies::PolicyID id);
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///! Define a Policy for CMake
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void DefinePolicy(cmPolicies::PolicyID id,
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const char *stringID,
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const char *shortDescription,
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const char *longDescription,
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unsigned int majorVersionIntroduced,
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unsigned int minorVersionIntroduced,
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unsigned int patchVersionIntroduced,
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unsigned int tweakVersionIntroduced,
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cmPolicies::PolicyStatus status);
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///! Set a policy level for this listfile
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bool ApplyPolicyVersion(cmMakefile *mf, const char *version);
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///! return a warning string for a given policy
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std::string GetPolicyWarning(cmPolicies::PolicyID id);
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///! return an error string for when a required policy is unspecified
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std::string GetRequiredPolicyError(cmPolicies::PolicyID id);
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///! return an error string for when a required policy is unspecified
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std::string GetRequiredAlwaysPolicyError(cmPolicies::PolicyID id);
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///! Get docs for policies
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void GetDocumentation(std::vector<cmDocumentationEntry>& v);
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/** Represent a set of policy values. */
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typedef std::map<PolicyID, PolicyStatus> PolicyMap;
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private:
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// might have to make these internal for VS6 not sure yet
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std::map<PolicyID,cmPolicy *> Policies;
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std::map<std::string,PolicyID> PolicyStringMap;
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void DiagnoseAncientPolicies(std::vector<PolicyID> const& ancient,
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unsigned int majorVer, unsigned int minorVer,
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unsigned int patchVer, cmMakefile* mf);
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bool GetPolicyDefault(cmMakefile* mf, std::string const& policy,
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cmPolicies::PolicyStatus* defaultStatus);
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};
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#endif
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