Author: Aaron Ballman Date: 2025-07-07T09:15:23-04:00 New Revision: 60630310e9a4033f9085b3874147824d8676b8a7
URL: https://github.com/llvm/llvm-project/commit/60630310e9a4033f9085b3874147824d8676b8a7 DIFF: https://github.com/llvm/llvm-project/commit/60630310e9a4033f9085b3874147824d8676b8a7.diff LOG: [clang-cl] Support /std:clatest (#147284) cl.exe has /std:clatest, analogous to /std:c++latest, which sets the language mode to the latest standard. For C, that's C23. This adds support for the option. Fixes #147233 Added: Modified: clang/docs/ReleaseNotes.rst clang/lib/Driver/ToolChains/Clang.cpp clang/test/Driver/cl-options.c Removed: ################################################################################ diff --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst index a6be59f1d6bd7..fddfc36d302b5 100644 --- a/clang/docs/ReleaseNotes.rst +++ b/clang/docs/ReleaseNotes.rst @@ -249,6 +249,8 @@ C Language Changes - The ``[[clang::assume()]]`` attribute is now correctly recognized in C. The ``__attribute__((assume()))`` form has always been supported, so the fix is specific to the attribute syntax used. +- The ``clang-cl`` driver now recognizes ``/std:clatest`` and sets the language + mode to C23. (#GH147233) C2y Feature Support ^^^^^^^^^^^^^^^^^^^ diff --git a/clang/lib/Driver/ToolChains/Clang.cpp b/clang/lib/Driver/ToolChains/Clang.cpp index 71d4f0af47179..7b8120da558f2 100644 --- a/clang/lib/Driver/ToolChains/Clang.cpp +++ b/clang/lib/Driver/ToolChains/Clang.cpp @@ -7212,6 +7212,8 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA, LanguageStandard = llvm::StringSwitch<StringRef>(StdArg->getValue()) .Case("c11", "-std=c11") .Case("c17", "-std=c17") + // TODO: add c23 when MSVC supports it. + .Case("clatest", "-std=c23") .Default(""); if (LanguageStandard.empty()) D.Diag(clang::diag::warn_drv_unused_argument) diff --git a/clang/test/Driver/cl-options.c b/clang/test/Driver/cl-options.c index eb079895a0a88..57e16e8795a28 100644 --- a/clang/test/Driver/cl-options.c +++ b/clang/test/Driver/cl-options.c @@ -362,6 +362,12 @@ // RUN: %clang_cl -c -### /std:c11 -- %s 2>&1 | FileCheck -check-prefix CHECK-C11 %s // CHECK-C11: -std=c11 +// RUN: %clang_cl -c -### /std:c17 -- %s 2>&1 | FileCheck -check-prefix CHECK-C17 %s +// CHECK-C17: -std=c17 + +// RUN: %clang_cl -c -### /std:clatest -- %s 2>&1 | FileCheck -check-prefix CHECK-CLATEST %s +// CHECK-CLATEST: -std=c23 + // For some warning ids, we can map from MSVC warning to Clang warning. // RUN: %clang_cl -wd4005 -wd4100 -wd4910 -wd4996 -wd12345678 -### -- %s 2>&1 | FileCheck -check-prefix=Wno %s // Wno: "-cc1" _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
