From 8f7a0766195c2147dbf6bf2707e7e708a849d333 Mon Sep 17 00:00:00 2001
From: Jakob Hasse <jakob.hasse@espressif.com>
Date: Wed, 12 Apr 2023 10:14:58 +0800
Subject: [PATCH] cmake: C++23 only when not using clang

---
 tools/cmake/build.cmake | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/tools/cmake/build.cmake b/tools/cmake/build.cmake
index ac350594e9..687c5c9212 100644
--- a/tools/cmake/build.cmake
+++ b/tools/cmake/build.cmake
@@ -129,7 +129,12 @@ function(__build_set_lang_version)
         # Use latest supported versions.
         # Please update docs/en/api-guides/cplusplus.rst when changing this.
         set(c_std gnu17)
-        set(cxx_std gnu++23)
+        if(NOT ${env_idf_toolchain} STREQUAL "clang")
+            set(cxx_std gnu++23)
+        else()
+            # TODO: IDF-7241 - remove the exception for clang
+            set(cxx_std gnu++20)
+        endif()
     else()
         enable_language(C CXX)
         # Building for Linux target, fall back to an older version of the standard