[llvm] [offload] Permit redefining OPENMP_STANDALONE_BUILD (PR #157253)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-offload

Author: Michał Górny (mgorny)

<details>
<summary>Changes</summary>

Permit redefining `OPENMP_STANDALONE_BUILD` to make it possible to build offload correctly via runtimes build (i.e. build where the top-level project is `runtimes`).  This follows the same logic in `openmp` component.

---
Full diff: https://github.com/llvm/llvm-project/pull/157253.diff


1 Files Affected:

- (modified) offload/CMakeLists.txt (+2-1) 


``````````diff
diff --git a/offload/CMakeLists.txt b/offload/CMakeLists.txt
index 38fa77e41bb53..a16c7dff3fd04 100644
--- a/offload/CMakeLists.txt
+++ b/offload/CMakeLists.txt
@@ -4,7 +4,8 @@
 cmake_minimum_required(VERSION 3.20.0)
 set(LLVM_SUBPROJECT_TITLE "liboffload")
 
-if ("${CMAKE_SOURCE_DIR}" STREQUAL "${CMAKE_CURRENT_SOURCE_DIR}")
+# Permit redefining OPENMP_STANDALONE_BUILD when doing a runtimes build.
+if (OPENMP_STANDALONE_BUILD OR "${CMAKE_SOURCE_DIR}" STREQUAL "${CMAKE_CURRENT_SOURCE_DIR}")
   set(OPENMP_STANDALONE_BUILD TRUE)
   project(offload C CXX ASM)
 else()

``````````

</details>


https://github.com/llvm/llvm-project/pull/157253