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Remove compatibility with CMake versions older than 3.0

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This compatibility has been deprecated since commit 3a4791548d
(Deprecate compatibility with CMake versions older than 3.5, 2023-02-09,
v3.27.0-rc1~508^2).  The behavior itself has been deprecated
since CMake 3.0.

Issue: #26613
This commit is contained in:
Brad King
2024-12-05 15:46:17 -05:00
parent 6973f8304e
commit 8e0a0291ef
8 changed files with 14 additions and 16 deletions
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4
Help/command/DEPRECATED_POLICY_VERSIONS.txt
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@@ -1,9 +1,9 @@
.. versionchanged:: 4.0
Compatibility with versions of CMake older than 2.8.12 is removed.
Compatibility with versions of CMake older than 3.0 is removed.
Calls to :command:`cmake_minimum_required(VERSION)` or
:command:`cmake_policy(VERSION)` that do not specify at least
2.8.12 as their policy version (optionally via ``...<max>``)
3.0 as their policy version (optionally via ``...<max>``)
will produce an error in CMake 4.0 and above.
.. versionchanged:: 3.31

2
Help/release/dev/remove-old-compatibility.rst
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@@ -1,7 +1,7 @@
remove-old-compatibility
------------------------
* Compatibility with versions of CMake older than 2.8.12 has been removed.
* Compatibility with versions of CMake older than 3.0 has been removed.
Calls to :command:`cmake_minimum_required` or :command:`cmake_policy`
that set the policy version to an older value now issue an error.
Note that calls to those commands can still support older versions of

2
Source/cmMakefile.cxx
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@@ -1604,7 +1604,7 @@ void cmMakefile::Configure()
this->SetCheckCMP0000(true);
// Implicitly set the version for the user.
cmPolicies::ApplyPolicyVersion(this, 2, 8, 12,
cmPolicies::ApplyPolicyVersion(this, 3, 0, 0,
cmPolicies::WarnCompat::Off);
}
}

14
Source/cmPolicies.cxx
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@@ -295,23 +295,21 @@ bool cmPolicies::ApplyPolicyVersion(cmMakefile* mf, unsigned int majorVer,
WarnCompat warnCompat)
{
// Error on policy versions for which support has been removed.
if (majorVer < 2 ||
(majorVer == 2 && (minorVer < 8 || (minorVer == 8 && patchVer < 12)))) {
if (majorVer < 3) {
if (IsFromLegacyInstallEXPORT(mf, majorVer, minorVer, patchVer)) {
// Silently tolerate cmake_policy calls generated by install(EXPORT)
// in CMake versions prior to 3.18.
majorVer = 2;
minorVer = 8;
patchVer = 12;
majorVer = 3;
minorVer = 0;
patchVer = 0;
} else {
mf->IssueMessage(MessageType::FATAL_ERROR,
"Compatibility with CMake < 2.8.12 has been removed "
"Compatibility with CMake < 3.0 has been removed "
"from CMake.\n" ADVICE_UPDATE_VERSION_ARGUMENT);
cmSystemTools::SetFatalErrorOccurred();
return false;
}
} else if ((majorVer < 3 || (majorVer == 3 && minorVer < 10)) &&
warnCompat == WarnCompat::On) {
} else if (majorVer == 3 && minorVer < 10 && warnCompat == WarnCompat::On) {
// Warn about policy versions for which support will be removed.
mf->IssueMessage(
MessageType::DEPRECATION_WARNING,

2
Tests/RunCMake/cmake_minimum_required/BeforeVersionRemoved-stderr.txt
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@@ -1,5 +1,5 @@
^CMake Error at BeforeVersionRemoved\.cmake:1 \(cmake_minimum_required\):
Compatibility with CMake < 2\.8\.12 has been removed from CMake\.
Compatibility with CMake < 3\.0 has been removed from CMake\.
Update the VERSION argument <min> value\. Or, use the <min>\.\.\.<max> syntax
to tell CMake that the project requires at least <min> but has been updated

2
Tests/RunCMake/cmake_minimum_required/BeforeVersionRemoved.cmake
View File

@@ -1 +1 @@
cmake_minimum_required(VERSION 2.8.11)
cmake_minimum_required(VERSION 2.8.12)

2
Tests/RunCMake/cmake_minimum_required/PolicyBeforeVersionRemoved-stderr.txt
View File

@@ -1,5 +1,5 @@
^CMake Error at PolicyBeforeVersionRemoved\.cmake:1 \(cmake_policy\):
Compatibility with CMake < 2\.8\.12 has been removed from CMake\.
Compatibility with CMake < 3\.0 has been removed from CMake\.
Update the VERSION argument <min> value\. Or, use the <min>\.\.\.<max> syntax
to tell CMake that the project requires at least <min> but has been updated

2
Tests/RunCMake/cmake_minimum_required/PolicyBeforeVersionRemoved.cmake
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@@ -1 +1 @@
cmake_policy(VERSION 2.8.11)
cmake_policy(VERSION 2.8.12)