cb185d93d2
The commit "modified the if command to address bug 9123 some" changed
the if() command behavior with respect to named boolean constants. It
introduced policy CMP0012 to provide compatibility. However, it also
changed behavior with respect to numbers (like '2') but did not cover
the change with the policy. Also, the behavior it created for numbers
is confusing ('2' is false).
This commit teaches if() to recognize numbers again, and treats them
like the C language does in terms of boolean conversion. We also fix
the CMP0012 check to trigger in all cases where the result of boolean
coersion differs from that produced by CMake 2.6.4.
105 lines
3.8 KiB
C++
105 lines
3.8 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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// 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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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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};
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#endif
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