cmPolicies: Introduce XMacro table for policy data.

Use it to populate the policy enum.

Source/cmPolicies.h

@@ -17,6 +17,202 @@
 class cmMakefile;
 class cmPolicy;
 
+#define CM_FOR_EACH_POLICY_TABLE(POLICY, SELECT) \
+  SELECT(POLICY, CMP0000, \
+    "A minimum required CMake version must be specified.", \
+    2, 6, 0, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0001, \
+    "CMAKE_BACKWARDS_COMPATIBILITY should no longer be used.", \
+    2, 6, 0, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0002, \
+  "Logical target names must be globally unique.", \
+    2, 6, 0, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0003, \
+    "Libraries linked via full path no longer produce linker search paths.", \
+    2, 6, 0, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0004, \
+    "Libraries linked may not have leading or trailing whitespace.", \
+    2, 6, 0, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0005, \
+    "Preprocessor definition values are now escaped automatically.", \
+    2, 6, 0, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0006, \
+    "Installing MACOSX_BUNDLE targets requires a BUNDLE DESTINATION.", \
+    2, 6, 0, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0007, \
+    "list command no longer ignores empty elements.", \
+    2, 6, 0, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0008, \
+    "Libraries linked by full-path must have a valid library file name.", \
+    2, 6, 1, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0009, \
+    "FILE GLOB_RECURSE calls should not follow symlinks by default.", \
+    2, 6, 2, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0010, \
+    "Bad variable reference syntax is an error.", \
+    2, 6, 3, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0011, \
+    "Included scripts do automatic cmake_policy PUSH and POP.", \
+    2, 6, 3, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0012, \
+    "if() recognizes numbers and boolean constants.", \
+    2, 8, 0, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0013, \
+    "Duplicate binary directories are not allowed.", \
+    2, 8, 0, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0014, \
+    "Input directories must have CMakeLists.txt.", \
+    2, 8, 0, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0015, \
+    "link_directories() treats paths relative to the source dir.", \
+    2, 8, 1, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0016, \
+    "target_link_libraries() reports error if its only argument " \
+    "is not a target.", \
+    2, 8, 3, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0017, \
+    "Prefer files from the CMake module directory when including from " \
+    "there.", \
+    2, 8, 4, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0018, \
+    "Ignore CMAKE_SHARED_LIBRARY_<Lang>_FLAGS variable.", \
+    2, 8, 9, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0019, \
+    "Do not re-expand variables in include and link information.", \
+    2, 8, 11, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0020, \
+    "Automatically link Qt executables to qtmain target on Windows.", \
+    2, 8, 11, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0021, \
+    "Fatal error on relative paths in INCLUDE_DIRECTORIES target property.", \
+    2, 8, 12, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0022, \
+    "INTERFACE_LINK_LIBRARIES defines the link interface.", \
+    2, 8, 12, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0023, \
+    "Plain and keyword target_link_libraries signatures cannot be mixed.", \
+    2, 8, 12, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0024, \
+    "Disallow include export result.", \
+    3, 0, 0, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0025, \
+    "Compiler id for Apple Clang is now AppleClang.", \
+    3, 0, 0, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0026, \
+    "Disallow use of the LOCATION target property.", \
+    3, 0, 0, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0027, \
+    "Conditionally linked imported targets with missing include " \
+    "directories.", \
+    3, 0, 0, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0028, \
+    "Double colon in target name means ALIAS or IMPORTED target.", \
+    3, 0, 0, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0029, \
+    "The subdir_depends command should not be called.", \
+    3, 0, 0, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0030, \
+    "The use_mangled_mesa command should not be called.", \
+    3, 0, 0, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0031, \
+    "The load_command command should not be called.", \
+    3, 0, 0, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0032, \
+    "The output_required_files command should not be called.", \
+    3, 0, 0, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0033, \
+    "The export_library_dependencies command should not be called.", \
+    3, 0, 0, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0034, \
+    "The utility_source command should not be called.", \
+    3, 0, 0, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0035, \
+    "The variable_requires command should not be called.", \
+    3, 0, 0, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0036, \
+    "The build_name command should not be called.", \
+    3, 0, 0, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0037, \
+    "Target names should not be reserved and should match a validity " \
+    "pattern.", \
+    3, 0, 0, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0038, \
+    "Targets may not link directly to themselves.", \
+    3, 0, 0, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0039, \
+    "Utility targets may not have link dependencies.", \
+    3, 0, 0, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0040, \
+    "The target in the TARGET signature of add_custom_command() must " \
+    "exist.", \
+    3, 0, 0, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0041, \
+    "Error on relative include with generator expression.", \
+    3, 0, 0, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0042, \
+    "MACOSX_RPATH is enabled by default.", \
+    3, 0, 0, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0043, \
+    "Ignore COMPILE_DEFINITIONS_<Config> properties.", \
+    3, 0, 0, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0044, \
+    "Case sensitive <LANG>_COMPILER_ID generator expressions.", \
+    3, 0, 0, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0045, \
+    "Error on non-existent target in get_target_property.", \
+    3, 0, 0, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0046, \
+    "Error on non-existent dependency in add_dependencies.", \
+    3, 0, 0, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0047, \
+    "Use QCC compiler id for the qcc drivers on QNX.", \
+    3, 0, 0, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0048, \
+    "project() command manages VERSION variables.", \
+    3, 0, 0, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0049, \
+    "Do not expand variables in target source entries.", \
+    3, 0, 0, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0050, \
+    "Disallow add_custom_command SOURCE signatures.", \
+    3, 0, 0, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0051, \
+    "List TARGET_OBJECTS in SOURCES target property.", \
+    3, 1, 0, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0052, \
+    "Reject source and build dirs in installed " \
+    "INTERFACE_INCLUDE_DIRECTORIES.", \
+    3, 1, 0, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0053, \
+    "Simplify variable reference and escape sequence evaluation.", \
+    3, 1, 0, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0054, \
+    "Only interpret if() arguments as variables or keywords when unquoted.", \
+    3, 1, 0, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0055, \
+    "Strict checking for break() command.", \
+    3, 2, 0, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0056, \
+    "Honor link flags in try_compile() source-file signature.", \
+    3, 2, 0, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0057, \
+    "Support new IN_LIST if() operator.", \
+    3, 3, 0, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0058, \
+    "Ninja requires custom command byproducts to be explicit.", \
+    3, 3, 0, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0059, \
+    "Do no treat DEFINITIONS as a built-in directory property.", \
+    3, 3, 0, cmPolicies::WARN) \
+  SELECT(POLICY, CMP0060, \
+    "Link libraries by full path even in implicit directories.", \
+    3, 3, 0, cmPolicies::WARN)
+
+#define CM_SELECT_ID(F, A1, A2, A3, A4, A5, A6) F(A1)
+#define CM_FOR_EACH_POLICY_ID(POLICY) \
+  CM_FOR_EACH_POLICY_TABLE(POLICY, CM_SELECT_ID)
+
+
 /** \class cmPolicies
  * \brief Handles changes in CMake behavior and policies
  *
@@ -44,78 +240,9 @@ public:
   /// Policy identifiers
   enum PolicyID
   {
-    CMP0000, ///< Policy version specification
-    CMP0001, ///< Ignore old compatibility variable
-    CMP0002, ///< Target names must be unique
-    CMP0003, ///< Linking does not include extra -L paths
-    CMP0004, ///< Libraries linked may not have leading or trailing whitespace
-    CMP0005, ///< Definition value escaping
-    CMP0006, ///< BUNDLE install rules needed for MACOSX_BUNDLE targets
-    CMP0007, ///< list command handling of empty elements
-    CMP0008, ///< Full-path libraries must be a valid library file name
-    CMP0009, ///< GLOB_RECURSE should not follow symlinks by default
-    CMP0010, ///< Bad variable reference syntax is an error
-    CMP0011, ///< Strong policy scope for include and find_package
-    CMP0012, ///< Recognize numbers and boolean constants in if()
-    CMP0013, ///< Duplicate binary directories not allowed
-    CMP0014, ///< Input directories must have CMakeLists.txt
-    CMP0015, ///< link_directories() treats paths relative to source dir
-    /// target_link_libraries() fails if only argument is not a target
-    CMP0016,
-    CMP0017, ///< Prefer files in CMAKE_ROOT when including from CMAKE_ROOT
-    CMP0018, ///< Ignore language flags for shared libs, and adhere to
-    /// POSITION_INDEPENDENT_CODE property and *_COMPILE_OPTIONS_PI{E,C}
-    /// instead.
-    CMP0019, ///< No variable re-expansion in include and link info
-    CMP0020, ///< Automatically link Qt executables to qtmain target
-    CMP0021, ///< Fatal error on relative paths in INCLUDE_DIRECTORIES
-    /// target property
-    CMP0022, ///< INTERFACE_LINK_LIBRARIES defines the link interface
-    CMP0023, ///< Disallow mixing keyword and plain tll signatures
-    CMP0024, ///< Disallow including export() result.
-    CMP0025, ///< Compiler id for Apple Clang is now AppleClang
-    CMP0026, ///< Disallow use of the LOCATION target property.
-    CMP0027, ///< Conditionally linked imported targets with missing include
-    /// directories.
-    CMP0028, ///< Double colon in target name means ALIAS or IMPORTED target.
-    CMP0029, ///< Disallow command: subdir_depends
-    CMP0030, ///< Disallow command: use_mangled_mesa
-    CMP0031, ///< Disallow command: load_command
-    CMP0032, ///< Disallow command: output_required_files
-    CMP0033, ///< Disallow command: export_library_dependencies
-    CMP0034, ///< Disallow command: utility_source
-    CMP0035, ///< Disallow command: variable_requires
-    CMP0036, ///< Disallow command: build_name
-    CMP0037, ///< Target names should not be reserved and
-    /// should match a validity pattern.
-    CMP0038, ///< Targets may not link directly to themselves
-    CMP0039, ///< Utility targets may not have link dependencies
-    CMP0040, ///< The target in the TARGET signature of
-    /// add_custom_command() must exist.
-    CMP0041, ///< Error on relative include with generator expression
-    CMP0042, ///< Enable MACOSX_RPATH by default
-    CMP0043, ///< Ignore COMPILE_DEFINITIONS_<Config> properties
-    CMP0044, ///< Case sensitive <LANG>_COMPILER_ID generator expressions
-    CMP0045, ///< Error on non-existent target in get_target_property
-    CMP0046, ///< Error on non-existent dependency in add_dependencies
-    CMP0047, ///< Use QCC compiler id for the qcc drivers on QNX.
-    CMP0048, ///< project() command manages VERSION variables
-    CMP0049, ///< Do not expand variables in target source entries
-    CMP0050, ///< Disallow add_custom_command SOURCE signatures
-    CMP0051, ///< List TARGET_OBJECTS in SOURCES target property
-    CMP0052, ///< Reject source and build dirs in installed
-    /// INTERFACE_INCLUDE_DIRECTORIES
-
-    CMP0053, ///< Simplify variable reference and escape sequence evaluation
-    CMP0054, ///< Only interpret if() arguments as variables
-    /// or keywords when unquoted.
-    CMP0055, ///< Strict checking for break() command.
-    CMP0056, ///< Honor link flags in try_compile() source-file signature.
-    CMP0057, ///< Support new IN_LIST if() operator.
-    CMP0058, ///< Ninja requires custom command byproducts to be explicit
-    CMP0059, ///< Do not treat ``DEFINITIONS`` as a built-in directory
-    /// property.
-    CMP0060, ///< Link libraries by full path even in implicit directories.
+#define POLICY_ENUM(POLICY_ID) POLICY_ID,
+    CM_FOR_EACH_POLICY_ID(POLICY_ENUM)
+#undef POLICY_ENUM
 
     /** \brief Always the last entry.
      *