[clang] 80b62cb - Enable c++20 modules support for c++23preview in clang-cl (#173663)

[via cfe-commits]

Author: ruki
Date: 2026-01-05T03:35:15Z
New Revision: 80b62cb9b979bf560ea17c127b1e85749376a6a2

URL: https://github.com/llvm/llvm-project/commit/80b62cb9b979bf560ea17c127b1e85749376a6a2
DIFF: https://github.com/llvm/llvm-project/commit/80b62cb9b979bf560ea17c127b1e85749376a6a2.diff

LOG: Enable c++20 modules support for c++23preview in clang-cl (#173663)

Fixes https://github.com/llvm/llvm-project/issues/173544

Co-authored-by: Chuanqi Xu <yedeng.yd at linux.alibaba.com>

Added: 
    

Modified: 
    clang/lib/Driver/ToolChains/Clang.cpp

Removed: 
    


################################################################################
diff  --git a/clang/lib/Driver/ToolChains/Clang.cpp b/clang/lib/Driver/ToolChains/Clang.cpp
index 060deb79e0c6f..8692200b40a69 100644
--- a/clang/lib/Driver/ToolChains/Clang.cpp
+++ b/clang/lib/Driver/ToolChains/Clang.cpp
@@ -7222,9 +7222,10 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
        Std->containsValue("c++20") || Std->containsValue("gnu++20") ||
        Std->containsValue("c++2b") || Std->containsValue("gnu++2b") ||
        Std->containsValue("c++23") || Std->containsValue("gnu++23") ||
-       Std->containsValue("c++2c") || Std->containsValue("gnu++2c") ||
-       Std->containsValue("c++26") || Std->containsValue("gnu++26") ||
-       Std->containsValue("c++latest") || Std->containsValue("gnu++latest"));
+       Std->containsValue("c++23preview") || Std->containsValue("c++2c") ||
+       Std->containsValue("gnu++2c") || Std->containsValue("c++26") ||
+       Std->containsValue("gnu++26") || Std->containsValue("c++latest") ||
+       Std->containsValue("gnu++latest"));
   bool HaveModules =
       RenderModulesOptions(C, D, Args, Input, Output, HaveCxx20, CmdArgs);