From 06d8fe2932a581c3f5427efd6aad36e0ee1e9af4 Mon Sep 17 00:00:00 2001
From: Laurent Aphecetche <laurent.aphecetche@gmail.com>
Date: Sun, 8 Feb 2026 17:29:50 +0100
Subject: [PATCH] [CMake] Use OUTPUT_NAME if defined in
 ROOT_GENERATE_DICTIONARY

---
 cmake/modules/RootMacros.cmake | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/cmake/modules/RootMacros.cmake b/cmake/modules/RootMacros.cmake
index 87c95d2e7ddf3..934f91542ec35 100644
--- a/cmake/modules/RootMacros.cmake
+++ b/cmake/modules/RootMacros.cmake
@@ -528,7 +528,13 @@ function(ROOT_GENERATE_DICTIONARY dictionary)
     if (NOT ${ARG_MODULE} STREQUAL ${library_target_name})
 #      message(AUTHOR_WARNING "The MODULE argument ${ARG_MODULE} and the deduced library name "
 #        "${library_target_name} mismatch. Deduction stem: ${dictionary}.")
-      set(library_target_name ${ARG_MODULE})
+      get_target_property(custom_name ${ARG_MODULE} OUTPUT_NAME)
+      if(NOT custom_name STREQUAL "custom_name-NOTFOUND")
+        # if the OUTPUT_NAME propery has been set, use that as library_target_name
+        set(library_target_name ${custom_name})
+      else()
+        set(library_target_name ${ARG_MODULE})
+      endif()
     endif()
   endif(ARG_MODULE)