From 8bc49c97c0ed3b2bf68d0fe99e921eb5b798bac8 Mon Sep 17 00:00:00 2001
From: Allen Winter <allen.winter@kdab.com>
Date: Tue, 2 Apr 2024 09:13:00 -0400
Subject: [PATCH] cmake/ECM - sync to upstream

---
 cmake/ECM/modules/ECMGenerateHeaders.cmake | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/cmake/ECM/modules/ECMGenerateHeaders.cmake b/cmake/ECM/modules/ECMGenerateHeaders.cmake
index 1ae9cf2..ddd6066 100644
--- a/cmake/ECM/modules/ECMGenerateHeaders.cmake
+++ b/cmake/ECM/modules/ECMGenerateHeaders.cmake
@@ -176,7 +176,8 @@ function(ECM_GENERATE_HEADERS camelcase_forwarding_headers_var)
         endif()
 
         set(_actualheader "${CMAKE_CURRENT_SOURCE_DIR}/${EGH_RELATIVE}${originalbasename}.${EGH_HEADER_EXTENSION}")
-        if (NOT EXISTS ${_actualheader})
+        get_source_file_property(_generated "${_actualheader}" GENERATED)
+        if (NOT _generated AND NOT EXISTS ${_actualheader})
             message(FATAL_ERROR "Could not find \"${_actualheader}\"")
         endif()