[PATCH] D150473: [clang/Driver] Also consider `gnu++` standard when checking for modules support

[Argyrios Kyrtzidis via Phabricator via cfe-commits]

akyrtzi created this revision.
Herald added a project: All.
akyrtzi requested review of this revision.
Herald added subscribers: cfe-commits, MaskRay.
Herald added a project: clang.

Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D150473

Files:
  clang/lib/Driver/ToolChains/Clang.cpp
  clang/test/Driver/modules.cpp


Index: clang/test/Driver/modules.cpp
===================================================================
--- clang/test/Driver/modules.cpp
+++ clang/test/Driver/modules.cpp
@@ -4,6 +4,7 @@
 // Check compiling a module interface to a .pcm file.
 //
 // RUN: %clang -std=c++2a -x c++-module --precompile %s -o %t/module.pcm -v 2>&1 | FileCheck %s --check-prefix=CHECK-PRECOMPILE
+// RUN: %clang -std=gnu++2a -x c++-module --precompile %s -o %t/module-gnu.pcm -v 2>&1 | FileCheck %s --check-prefix=CHECK-PRECOMPILE
 //
 // CHECK-PRECOMPILE: -cc1 {{.*}} -emit-module-interface
 // CHECK-PRECOMPILE-SAME: -o {{.*}}.pcm
@@ -23,6 +24,7 @@
 //
 // RUN: %clang -std=c++2a -fmodule-file=%t/module.pcm -Dexport= %s -S -o %t/module.o -v 2>&1 | FileCheck %s --check-prefix=CHECK-USE
 // RUN: %clang -std=c++20 -fmodule-file=%t/module.pcm -Dexport= %s -S -o %t/module.o -v 2>&1 | FileCheck %s --check-prefix=CHECK-USE
+// RUN: %clang -std=gnu++20 -fmodule-file=%t/module-gnu.pcm -Dexport= %s -S -o %t/module.o -v 2>&1 | FileCheck %s --check-prefix=CHECK-USE
 //
 // CHECK-USE: -cc1 {{.*}} {{-emit-obj|-S}}
 // CHECK-USE-SAME: -fmodule-file={{.*}}.pcm
Index: clang/lib/Driver/ToolChains/Clang.cpp
===================================================================
--- clang/lib/Driver/ToolChains/Clang.cpp
+++ clang/lib/Driver/ToolChains/Clang.cpp
@@ -3672,9 +3672,11 @@
   // modules support by default.
   bool HaveStdCXXModules =
       IsCXX && Std &&
-      (Std->containsValue("c++2a") || Std->containsValue("c++20") ||
-       Std->containsValue("c++2b") || Std->containsValue("c++23") ||
-       Std->containsValue("c++latest"));
+      (Std->containsValue("c++2a") || Std->containsValue("gnu++2a") ||
+       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++latest") || Std->containsValue("gnu++latest"));
   bool HaveModules = HaveStdCXXModules;
 
   // -fmodules enables the use of precompiled modules (off by default).


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