From 06e32fd6c9dddeb6b73743504847e14605a57fab Mon Sep 17 00:00:00 2001
From: Kris Rowe <kris.rowe@anl.gov>
Date: Mon, 27 Nov 2023 23:07:04 -0600
Subject: [PATCH] Sets `OCCA_<MODE>_ENABLED` in CMake parent scope. (#720)

Intended for CMake builds which add occa as a subdirectory.
---
 CMakeLists.txt | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 481d1e663..a0710002e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.17 FATAL_ERROR)
+cmake_minimum_required (VERSION 3.21 FATAL_ERROR)
 
 #---[ CMake Config ]--------------------
 set_property(GLOBAL PROPERTY USE_FOLDERS ON)
@@ -244,6 +244,16 @@ if(ENABLE_METAL AND APPLE)
   endif()
 endif()
 #=======================================
+  
+if(NOT OCCA_IS_TOP_LEVEL)
+# OCCA is being built as a subdirectory in another project
+  set(OCCA_OPENMP_ENABLED ${OCCA_OPENMP_ENABLED} PARENT_SCOPE)
+  set(OCCA_CUDA_ENABLED ${OCCA_CUDA_ENABLED} PARENT_SCOPE)
+  set(OCCA_HIP_ENABLED ${OCCA_HIP_ENABLED} PARENT_SCOPE)
+  set(OCCA_DPCPP_ENABLED ${OCCA_DPCPP_ENABLED} PARENT_SCOPE)
+  set(OCCA_OPENCL_ENABLED ${OCCA_OPENCL_ENABLED} PARENT_SCOPE)
+  set(OCCA_METAL_ENABLED ${OCCA_METAL_ENABLED} PARENT_SCOPE)
+endif()
 
 # Generate CompiledDefines from libraries we found
 configure_file(