From 3bf918e29359ff3c3aa10b477d52d577235ca40b Mon Sep 17 00:00:00 2001
From: Marco Bubke <marco.bubke@qt.io>
Date: Thu, 6 Mar 2025 09:45:27 +0100
Subject: [PATCH] Increase concept diagnostics depth only for C++

Before it was tested if the C++ compiler would be GCC. It was not
testing if the compiler would be C++.

Fixes: QTCREATORBUG-32583
Change-Id: I2ca3614dc4a429bc594fade81b86cedceb2ef98c
Reviewed-by: Eike Ziller <eike.ziller@qt.io>
---
 cmake/QtCreatorAPIInternal.cmake | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/cmake/QtCreatorAPIInternal.cmake b/cmake/QtCreatorAPIInternal.cmake
index 37e0f017b3d..ce7489b4c18 100644
--- a/cmake/QtCreatorAPIInternal.cmake
+++ b/cmake/QtCreatorAPIInternal.cmake
@@ -196,9 +196,7 @@ function(qtc_enable_sanitize _target _sanitize_flags)
 endfunction()
 
 function(qtc_deeper_concept_diagnostic_depth _target)
-  if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
-    target_compile_options("${_target}" PUBLIC -fconcepts-diagnostics-depth=8)
-  endif()
+  target_compile_options("${_target}" PRIVATE $<$<COMPILE_LANG_AND_ID:CXX,GNU>:-fconcepts-diagnostics-depth=8>)
 endfunction()
 
 function(qtc_add_link_flags_no_undefined target)