| #include "cmPolicies.h" |
| |
| #include "cmAlgorithms.h" |
| #include "cmMakefile.h" |
| #include "cmState.h" |
| #include "cmStateTypes.h" |
| #include "cmSystemTools.h" |
| #include "cmVersion.h" |
| #include "cmake.h" |
| |
| #include <assert.h> |
| #include <ctype.h> |
| #include <sstream> |
| #include <stdio.h> |
| #include <string.h> |
| #include <vector> |
| |
| static bool stringToId(const char* input, cmPolicies::PolicyID& pid) |
| { |
| assert(input); |
| if (strlen(input) != 7) { |
| return false; |
| } |
| if (!cmHasLiteralPrefix(input, "CMP")) { |
| return false; |
| } |
| if (cmHasLiteralSuffix(input, "0000")) { |
| pid = cmPolicies::CMP0000; |
| return true; |
| } |
| for (int i = 3; i < 7; ++i) { |
| if (!isdigit(*(input + i))) { |
| return false; |
| } |
| } |
| long id; |
| if (!cmSystemTools::StringToLong(input + 3, &id)) { |
| return false; |
| } |
| if (id >= cmPolicies::CMPCOUNT) { |
| return false; |
| } |
| pid = cmPolicies::PolicyID(id); |
| return true; |
| } |
| |
| #define CM_SELECT_ID_VERSION(F, A1, A2, A3, A4, A5, A6) F(A1, A3, A4, A5) |
| #define CM_FOR_EACH_POLICY_ID_VERSION(POLICY) \ |
| CM_FOR_EACH_POLICY_TABLE(POLICY, CM_SELECT_ID_VERSION) |
| |
| #define CM_SELECT_ID_DOC(F, A1, A2, A3, A4, A5, A6) F(A1, A2) |
| #define CM_FOR_EACH_POLICY_ID_DOC(POLICY) \ |
| CM_FOR_EACH_POLICY_TABLE(POLICY, CM_SELECT_ID_DOC) |
| |
| static const char* idToString(cmPolicies::PolicyID id) |
| { |
| switch (id) { |
| #define POLICY_CASE(ID) \ |
| case cmPolicies::ID: \ |
| return #ID; |
| CM_FOR_EACH_POLICY_ID(POLICY_CASE) |
| #undef POLICY_CASE |
| case cmPolicies::CMPCOUNT: |
| return nullptr; |
| } |
| return nullptr; |
| } |
| |
| static const char* idToVersion(cmPolicies::PolicyID id) |
| { |
| switch (id) { |
| #define POLICY_CASE(ID, V_MAJOR, V_MINOR, V_PATCH) \ |
| case cmPolicies::ID: \ |
| return #V_MAJOR "." #V_MINOR "." #V_PATCH; |
| CM_FOR_EACH_POLICY_ID_VERSION(POLICY_CASE) |
| #undef POLICY_CASE |
| case cmPolicies::CMPCOUNT: |
| return nullptr; |
| } |
| return nullptr; |
| } |
| |
| static bool isPolicyNewerThan(cmPolicies::PolicyID id, unsigned int majorV, |
| unsigned int minorV, unsigned int patchV) |
| { |
| switch (id) { |
| #define POLICY_CASE(ID, V_MAJOR, V_MINOR, V_PATCH) \ |
| case cmPolicies::ID: \ |
| return (majorV < (V_MAJOR) || \ |
| (majorV == (V_MAJOR) && minorV + 1 < (V_MINOR) + 1) || \ |
| (majorV == (V_MAJOR) && minorV == (V_MINOR) && \ |
| patchV + 1 < (V_PATCH) + 1)); |
| CM_FOR_EACH_POLICY_ID_VERSION(POLICY_CASE) |
| #undef POLICY_CASE |
| case cmPolicies::CMPCOUNT: |
| return false; |
| } |
| return false; |
| } |
| |
| const char* idToShortDescription(cmPolicies::PolicyID id) |
| { |
| switch (id) { |
| #define POLICY_CASE(ID, SHORT_DESCRIPTION) \ |
| case cmPolicies::ID: \ |
| return SHORT_DESCRIPTION; |
| CM_FOR_EACH_POLICY_ID_DOC(POLICY_CASE) |
| #undef POLICY_CASE |
| case cmPolicies::CMPCOUNT: |
| return nullptr; |
| } |
| return nullptr; |
| } |
| |
| static void DiagnoseAncientPolicies( |
| std::vector<cmPolicies::PolicyID> const& ancient, unsigned int majorVer, |
| unsigned int minorVer, unsigned int patchVer, cmMakefile* mf) |
| { |
| std::ostringstream e; |
| e << "The project requests behavior compatible with CMake version \"" |
| << majorVer << "." << minorVer << "." << patchVer |
| << "\", which requires the OLD behavior for some policies:\n"; |
| for (cmPolicies::PolicyID i : ancient) { |
| e << " " << idToString(i) << ": " << idToShortDescription(i) << "\n"; |
| } |
| e << "However, this version of CMake no longer supports the OLD " |
| << "behavior for these policies. " |
| << "Please either update your CMakeLists.txt files to conform to " |
| << "the new behavior or use an older version of CMake that still " |
| << "supports the old behavior."; |
| mf->IssueMessage(cmake::FATAL_ERROR, e.str()); |
| } |
| |
| static bool GetPolicyDefault(cmMakefile* mf, std::string const& policy, |
| cmPolicies::PolicyStatus* defaultSetting) |
| { |
| std::string defaultVar = "CMAKE_POLICY_DEFAULT_" + policy; |
| std::string defaultValue = mf->GetSafeDefinition(defaultVar); |
| if (defaultValue == "NEW") { |
| *defaultSetting = cmPolicies::NEW; |
| } else if (defaultValue == "OLD") { |
| *defaultSetting = cmPolicies::OLD; |
| } else if (defaultValue.empty()) { |
| *defaultSetting = cmPolicies::WARN; |
| } else { |
| std::ostringstream e; |
| e << defaultVar << " has value \"" << defaultValue |
| << "\" but must be \"OLD\", \"NEW\", or \"\" (empty)."; |
| mf->IssueMessage(cmake::FATAL_ERROR, e.str()); |
| return false; |
| } |
| |
| return true; |
| } |
| |
| bool cmPolicies::ApplyPolicyVersion(cmMakefile* mf, const char* version) |
| { |
| std::string ver = "2.4.0"; |
| |
| if (version && strlen(version) > 0) { |
| ver = version; |
| } |
| |
| unsigned int majorVer = 2; |
| unsigned int minorVer = 0; |
| unsigned int patchVer = 0; |
| unsigned int tweakVer = 0; |
| |
| // parse the string |
| if (sscanf(ver.c_str(), "%u.%u.%u.%u", &majorVer, &minorVer, &patchVer, |
| &tweakVer) < 2) { |
| std::ostringstream e; |
| e << "Invalid policy version value \"" << ver << "\". " |
| << "A numeric major.minor[.patch[.tweak]] must be given."; |
| mf->IssueMessage(cmake::FATAL_ERROR, e.str()); |
| return false; |
| } |
| |
| // it is an error if the policy version is less than 2.4 |
| if (majorVer < 2 || (majorVer == 2 && minorVer < 4)) { |
| mf->IssueMessage( |
| cmake::FATAL_ERROR, |
| "Compatibility with CMake < 2.4 is not supported by CMake >= 3.0. " |
| "For compatibility with older versions please use any CMake 2.8.x " |
| "release or lower."); |
| return false; |
| } |
| |
| // It is an error if the policy version is greater than the running |
| // CMake. |
| if (majorVer > cmVersion::GetMajorVersion() || |
| (majorVer == cmVersion::GetMajorVersion() && |
| minorVer > cmVersion::GetMinorVersion()) || |
| (majorVer == cmVersion::GetMajorVersion() && |
| minorVer == cmVersion::GetMinorVersion() && |
| patchVer > cmVersion::GetPatchVersion()) || |
| (majorVer == cmVersion::GetMajorVersion() && |
| minorVer == cmVersion::GetMinorVersion() && |
| patchVer == cmVersion::GetPatchVersion() && |
| tweakVer > cmVersion::GetTweakVersion())) { |
| std::ostringstream e; |
| e << "An attempt was made to set the policy version of CMake to \"" |
| << version << "\" which is greater than this version of CMake. " |
| << "This is not allowed because the greater version may have new " |
| << "policies not known to this CMake. " |
| << "You may need a newer CMake version to build this project."; |
| mf->IssueMessage(cmake::FATAL_ERROR, e.str()); |
| return false; |
| } |
| |
| // now loop over all the policies and set them as appropriate |
| std::vector<cmPolicies::PolicyID> ancientPolicies; |
| for (PolicyID pid = cmPolicies::CMP0000; pid != cmPolicies::CMPCOUNT; |
| pid = PolicyID(pid + 1)) { |
| if (isPolicyNewerThan(pid, majorVer, minorVer, patchVer)) { |
| if (cmPolicies::GetPolicyStatus(pid) == cmPolicies::REQUIRED_ALWAYS) { |
| ancientPolicies.push_back(pid); |
| } else { |
| cmPolicies::PolicyStatus status = cmPolicies::WARN; |
| if (!GetPolicyDefault(mf, idToString(pid), &status) || |
| !mf->SetPolicy(pid, status)) { |
| return false; |
| } |
| if (pid == cmPolicies::CMP0001 && |
| (status == cmPolicies::WARN || status == cmPolicies::OLD)) { |
| if (!(mf->GetState()->GetInitializedCacheValue( |
| "CMAKE_BACKWARDS_COMPATIBILITY"))) { |
| // Set it to 2.4 because that is the last version where the |
| // variable had meaning. |
| mf->AddCacheDefinition( |
| "CMAKE_BACKWARDS_COMPATIBILITY", "2.4", |
| "For backwards compatibility, what version of CMake " |
| "commands and " |
| "syntax should this version of CMake try to support.", |
| cmStateEnums::STRING); |
| } |
| } |
| } |
| } else { |
| if (!mf->SetPolicy(pid, cmPolicies::NEW)) { |
| return false; |
| } |
| } |
| } |
| |
| // Make sure the project does not use any ancient policies. |
| if (!ancientPolicies.empty()) { |
| DiagnoseAncientPolicies(ancientPolicies, majorVer, minorVer, patchVer, mf); |
| cmSystemTools::SetFatalErrorOccured(); |
| return false; |
| } |
| |
| return true; |
| } |
| |
| bool cmPolicies::GetPolicyID(const char* id, cmPolicies::PolicyID& pid) |
| { |
| return stringToId(id, pid); |
| } |
| |
| ///! return a warning string for a given policy |
| std::string cmPolicies::GetPolicyWarning(cmPolicies::PolicyID id) |
| { |
| std::ostringstream msg; |
| msg << "Policy " << idToString(id) << " is not set: " |
| "" |
| << idToShortDescription(id) << " " |
| "Run \"cmake --help-policy " |
| << idToString(id) << "\" for " |
| "policy details. " |
| "Use the cmake_policy command to set the policy " |
| "and suppress this warning."; |
| return msg.str(); |
| } |
| |
| std::string cmPolicies::GetPolicyDeprecatedWarning(cmPolicies::PolicyID id) |
| { |
| std::ostringstream msg; |
| /* clang-format off */ |
| msg << |
| "The OLD behavior for policy " << idToString(id) << " " |
| "will be removed from a future version of CMake.\n" |
| "The cmake-policies(7) manual explains that the OLD behaviors of all " |
| "policies are deprecated and that a policy should be set to OLD only " |
| "under specific short-term circumstances. Projects should be ported " |
| "to the NEW behavior and not rely on setting a policy to OLD." |
| ; |
| /* clang-format on */ |
| return msg.str(); |
| } |
| |
| ///! return an error string for when a required policy is unspecified |
| std::string cmPolicies::GetRequiredPolicyError(cmPolicies::PolicyID id) |
| { |
| std::ostringstream error; |
| error << "Policy " << idToString(id) << " is not set to NEW: " |
| "" |
| << idToShortDescription(id) << " " |
| "Run \"cmake --help-policy " |
| << idToString(id) |
| << "\" for " |
| "policy details. " |
| "CMake now requires this policy to be set to NEW by the project. " |
| "The policy may be set explicitly using the code\n" |
| " cmake_policy(SET " |
| << idToString(id) << " NEW)\n" |
| "or by upgrading all policies with the code\n" |
| " cmake_policy(VERSION " |
| << idToVersion(id) |
| << ") # or later\n" |
| "Run \"cmake --help-command cmake_policy\" for more information."; |
| return error.str(); |
| } |
| |
| ///! Get the default status for a policy |
| cmPolicies::PolicyStatus cmPolicies::GetPolicyStatus( |
| cmPolicies::PolicyID /*unused*/) |
| { |
| return cmPolicies::WARN; |
| } |
| |
| std::string cmPolicies::GetRequiredAlwaysPolicyError(cmPolicies::PolicyID id) |
| { |
| std::string pid = idToString(id); |
| std::ostringstream e; |
| e << "Policy " << pid << " may not be set to OLD behavior because this " |
| << "version of CMake no longer supports it. " |
| << "The policy was introduced in " |
| << "CMake version " << idToVersion(id) |
| << ", and use of NEW behavior is now required." |
| << "\n" |
| << "Please either update your CMakeLists.txt files to conform to " |
| << "the new behavior or use an older version of CMake that still " |
| << "supports the old behavior. " |
| << "Run cmake --help-policy " << pid << " for more information."; |
| return e.str(); |
| } |
| |
| cmPolicies::PolicyStatus cmPolicies::PolicyMap::Get( |
| cmPolicies::PolicyID id) const |
| { |
| PolicyStatus status = cmPolicies::WARN; |
| |
| if (this->Status[(POLICY_STATUS_COUNT * id) + OLD]) { |
| status = cmPolicies::OLD; |
| } else if (this->Status[(POLICY_STATUS_COUNT * id) + NEW]) { |
| status = cmPolicies::NEW; |
| } |
| return status; |
| } |
| |
| void cmPolicies::PolicyMap::Set(cmPolicies::PolicyID id, |
| cmPolicies::PolicyStatus status) |
| { |
| this->Status[(POLICY_STATUS_COUNT * id) + OLD] = (status == OLD); |
| this->Status[(POLICY_STATUS_COUNT * id) + WARN] = (status == WARN); |
| this->Status[(POLICY_STATUS_COUNT * id) + NEW] = (status == NEW); |
| } |
| |
| bool cmPolicies::PolicyMap::IsDefined(cmPolicies::PolicyID id) const |
| { |
| return this->Status[(POLICY_STATUS_COUNT * id) + OLD] || |
| this->Status[(POLICY_STATUS_COUNT * id) + WARN] || |
| this->Status[(POLICY_STATUS_COUNT * id) + NEW]; |
| } |
| |
| bool cmPolicies::PolicyMap::IsEmpty() const |
| { |
| return this->Status.none(); |
| } |
