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clang-cl: add c++23 support via /clang:-std= and remove CPP11AsCPP14Mixin

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clang-cl supports C++11 natively, so CPP11AsCPP14Mixin is not needed.
Override get_option_std_args to use /clang:-std=c++N for all standards
except c++latest/vc++latest which still require /std:c++latest. Add
c++23 and vc++23 to the supported standards list.

Fixes #15845
This commit is contained in:
Koushik Nakka
2026-05-28 16:26:55 -04:00
committed by Dylan Baker
parent 1e50fe1adb
commit 3b7c81d462
1 changed files with 19 additions and 2 deletions
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21
mesonbuild/compilers/cpp.py
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@@ -942,7 +942,7 @@ class VisualStudioCPPCompiler(CPP11AsCPP14Mixin, VisualStudioLikeCPPCompilerMixi
def get_cpp_modules_args(self) -> T.List[str]:
return ['/interface']
class ClangClCPPCompiler(CPP11AsCPP14Mixin, VisualStudioLikeCPPCompilerMixin, ClangClCompiler, CPPCompiler):
class ClangClCPPCompiler(VisualStudioLikeCPPCompilerMixin, ClangClCompiler, CPPCompiler):
id = 'clang-cl'
@@ -955,9 +955,26 @@ class ClangClCPPCompiler(CPP11AsCPP14Mixin, VisualStudioLikeCPPCompilerMixin, Cl
ClangClCompiler.__init__(self, target)
def get_options(self) -> 'MutableKeyedOptionDictType':
cpp_stds = ['none', 'c++11', 'vc++11', 'c++14', 'vc++14', 'c++17', 'vc++17', 'c++20', 'vc++20', 'c++latest']
cpp_stds = ['none', 'c++11', 'vc++11', 'c++14', 'vc++14', 'c++17', 'vc++17', 'c++20', 'vc++20', 'c++23', 'vc++23', 'c++latest']
return self._get_options_impl(super().get_options(), cpp_stds)
def get_option_std_args(self, target: BuildTarget, subproject: T.Optional[str] = None) -> T.List[str]:
std = self.get_compileropt_value('std', target, subproject)
assert isinstance(std, str)
if std == 'none':
return []
# c++latest and vc++latest have no /clang:-std= equivalent
if std in {'c++latest', 'vc++latest'}:
args = ['/std:c++latest']
if std == 'c++latest':
args.append('/permissive-')
return args
# vc++ variants: permissive mode, strip 'vc++' prefix to get clang std name
if std.startswith('vc++'):
return [f'/clang:-std=c++{std[4:]}']
# c++ variants: strict conformance mode
return [f'/clang:-std={std}', '/permissive-']
def get_cpp_modules_args(self) -> T.List[str]:
# clang-cl does not support /interface.
return ['-fmodules', '-fmodules-ts']