From d7dfad3ffbdfadaf974d4cb59e3a48adddcbf5f1 Mon Sep 17 00:00:00 2001
From: Felix Schlepper <felix.schlepper@cern.ch>
Date: Sat, 7 Feb 2026 09:25:07 +0100
Subject: [PATCH 1/2] Enhance OpenMP detection for macOS

Updated OpenMP detection for macOS with hints to brew library paths and set required compile flags.
---
 dependencies/FindOpenMPMacOS.cmake | 40 ++++++++++++++++++++++--------
 1 file changed, 29 insertions(+), 11 deletions(-)

diff --git a/dependencies/FindOpenMPMacOS.cmake b/dependencies/FindOpenMPMacOS.cmake
index 264ce5398a331..c4efc788dd9e6 100644
--- a/dependencies/FindOpenMPMacOS.cmake
+++ b/dependencies/FindOpenMPMacOS.cmake
@@ -1,28 +1,46 @@
 find_library(OpenMP_LIBRARY
-    NAMES omp
+    NAMES omp libomp
+    HINTS
+        /opt/homebrew/opt/libomp/lib
+        /opt/homebrew/lib
+        /usr/local/opt/libomp/lib
+        /usr/local/lib
 )
 
 find_path(OpenMP_INCLUDE_DIR
-    omp.h
+    NAMES omp.h
+    HINTS
+        /opt/homebrew/opt/libomp/include
+        /opt/homebrew/include
+        /usr/local/opt/libomp/include
+        /usr/local/include
 )
 
 mark_as_advanced(OpenMP_LIBRARY OpenMP_INCLUDE_DIR)
 
 include(FindPackageHandleStandardArgs)
-find_package_handle_standard_args(OpenMP DEFAULT_MSG
-    OpenMP_LIBRARY OpenMP_INCLUDE_DIR)
+find_package_handle_standard_args(
+    OpenMPMacOS
+    DEFAULT_MSG
+    OpenMP_LIBRARY OpenMP_INCLUDE_DIR
+)
 
-if (OpenMP_FOUND)
+if (OpenMPMacOS_FOUND)
     set(OpenMP_LIBRARIES ${OpenMP_LIBRARY})
     set(OpenMP_INCLUDE_DIRS ${OpenMP_INCLUDE_DIR})
-    set(OpenMP_COMPILE_OPTIONS -Xpreprocessor -fopenmp)
 
-    set(OpenMP_CXX_FOUND True)
-    set(OpenMPMacOS_FOUND True)
-    add_library(OpenMP::OpenMP_CXX SHARED IMPORTED)
+    set(OpenMP_CXX_FOUND TRUE)
+    set(OpenMP_FOUND TRUE)
+
+    add_library(OpenMP::OpenMP_CXX INTERFACE IMPORTED)
     set_target_properties(OpenMP::OpenMP_CXX PROPERTIES
-        IMPORTED_LOCATION ${OpenMP_LIBRARIES}
         INTERFACE_INCLUDE_DIRECTORIES "${OpenMP_INCLUDE_DIRS}"
-        INTERFACE_COMPILE_OPTIONS "${OpenMP_COMPILE_OPTIONS}"
+        INTERFACE_COMPILE_OPTIONS "-Xclang;-fopenmp"
+        INTERFACE_LINK_LIBRARIES "${OpenMP_LIBRARIES}"
+    )
+    message(STATUS
+        "Found OpenMP (macOS workaround): "
+        "library=${OpenMP_LIBRARY}, "
+        "include=${OpenMP_INCLUDE_DIR}"
     )
 endif()

From 0492de8d04a3f58726d3754ada352153e4f3350b Mon Sep 17 00:00:00 2001
From: Felix Schlepper <felix.schlepper@cern.ch>
Date: Sat, 7 Feb 2026 09:31:24 +0100
Subject: [PATCH 2/2] Add copyright and license details to CMake file

Added copyright and licensing information to FindOpenMPMacOS.cmake.
---
 dependencies/FindOpenMPMacOS.cmake | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/dependencies/FindOpenMPMacOS.cmake b/dependencies/FindOpenMPMacOS.cmake
index c4efc788dd9e6..6ebcf563c2136 100644
--- a/dependencies/FindOpenMPMacOS.cmake
+++ b/dependencies/FindOpenMPMacOS.cmake
@@ -1,3 +1,14 @@
+# Copyright 2019-2026 CERN and copyright holders of ALICE O2.
+# See https://alice-o2.web.cern.ch/copyright for details of the copyright holders.
+# All rights not expressly granted are reserved.
+#
+# This software is distributed under the terms of the GNU General Public
+# License v3 (GPL Version 3), copied verbatim in the file "COPYING".
+#
+# In applying this license CERN does not waive the privileges and immunities
+# granted to it by virtue of its status as an Intergovernmental Organization
+# or submit itself to any jurisdiction.
+
 find_library(OpenMP_LIBRARY
     NAMES omp libomp
     HINTS