CMake/Source/cmPolicies.h

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Simplify CMake per-source license notices Per-source copyright/license notice headers that spell out copyright holder names and years are hard to maintain and often out-of-date or plain wrong. Precise contributor information is already maintained automatically by the version control tool. Ultimately it is the receiver of a file who is responsible for determining its licensing status, and per-source notices are merely a convenience. Therefore it is simpler and more accurate for each source to have a generic notice of the license name and references to more detailed information on copyright holders and full license terms. Our `Copyright.txt` file now contains a list of Contributors whose names appeared source-level copyright notices. It also references version control history for more precise information. Therefore we no longer need to spell out the list of Contributors in each source file notice. Replace CMake per-source copyright/license notice headers with a short description of the license and links to `Copyright.txt` and online information available from "https://cmake.org/licensing". The online URL also handles cases of modules being copied out of our source into other projects, so we can drop our notices about replacing links with full license text. Run the `Utilities/Scripts/filter-notices.bash` script to perform the majority of the replacements mechanically. Manually fix up shebang lines and trailing newlines in a few files. Manually update the notices in a few files that the script does not handle.
2016-09-27 22:01:08 +03:00
/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
file Copyright.txt or https://cmake.org/licensing for details. */
#ifndef cmPolicies_h
#define cmPolicies_h
#include <cmConfigure.h> // IWYU pragma: keep
#include <bitset>
#include <string>
class cmMakefile;
#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 not 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) \
SELECT(POLICY, CMP0061, \
"CTest does not by default tell make to ignore errors (-i).", 3, 3, \
0, cmPolicies::WARN) \
SELECT(POLICY, CMP0062, "Disallow install() of export() result.", 3, 3, 0, \
cmPolicies::WARN) \
SELECT(POLICY, CMP0063, \
"Honor visibility properties for all target types.", 3, 3, 0, \
cmPolicies::WARN) \
SELECT(POLICY, CMP0064, "Support new TEST if() operator.", 3, 4, 0, \
cmPolicies::WARN) \
SELECT(POLICY, CMP0065, \
"Do not add flags to export symbols from executables without " \
"the ENABLE_EXPORTS target property.", \
3, 4, 0, cmPolicies::WARN) \
SELECT(POLICY, CMP0066, \
"Honor per-config flags in try_compile() source-file signature.", 3, \
7, 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)
#define CM_FOR_EACH_TARGET_POLICY(F) \
F(CMP0003) \
F(CMP0004) \
F(CMP0008) \
F(CMP0020) \
F(CMP0021) \
F(CMP0022) \
F(CMP0027) \
F(CMP0038) \
F(CMP0041) \
F(CMP0042) \
F(CMP0046) \
F(CMP0052) \
F(CMP0060) \
F(CMP0063) \
F(CMP0065)
/** \class cmPolicies
* \brief Handles changes in CMake behavior and policies
*
* See the cmake wiki section on
* <a href="https://cmake.org/Wiki/CMake/Policies">policies</a>
* for an overview of this class's purpose
*/
class cmPolicies
{
public:
/// Status of a policy
enum PolicyStatus
{
OLD, ///< Use old behavior
WARN, ///< Use old behavior but issue a warning
NEW, ///< Use new behavior
/// Issue an error if user doesn't set policy status to NEW and hits the
/// check
REQUIRED_IF_USED,
REQUIRED_ALWAYS ///< Issue an error unless user sets policy status to NEW.
};
/// Policy identifiers
enum PolicyID
{
#define POLICY_ENUM(POLICY_ID) POLICY_ID,
CM_FOR_EACH_POLICY_ID(POLICY_ENUM)
#undef POLICY_ENUM
/** \brief Always the last entry.
*
* Useful mostly to avoid adding a comma the last policy when adding a new
* one.
*/
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CMPCOUNT
};
///! convert a string policy ID into a number
static bool GetPolicyID(const char* id, /* out */ cmPolicies::PolicyID& pid);
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///! Get the default status for a policy
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static cmPolicies::PolicyStatus GetPolicyStatus(cmPolicies::PolicyID id);
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///! Set a policy level for this listfile
static bool ApplyPolicyVersion(cmMakefile* mf, const char* version);
///! return a warning string for a given policy
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static 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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static std::string GetRequiredPolicyError(cmPolicies::PolicyID id);
///! return an error string for when a required policy is unspecified
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static std::string GetRequiredAlwaysPolicyError(cmPolicies::PolicyID id);
/** Represent a set of policy values. */
struct PolicyMap
{
PolicyStatus Get(PolicyID id) const;
void Set(PolicyID id, PolicyStatus status);
bool IsDefined(PolicyID id) const;
bool IsEmpty() const;
private:
#define POLICY_STATUS_COUNT 3
std::bitset<cmPolicies::CMPCOUNT * POLICY_STATUS_COUNT> Status;
};
};
#endif