[llvm] [Offload] Enable shared-libs; compiler-rt as default RTLIB (PR #123568)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-backend-amdgpu

Author: Jan Patrick Lehr (jplehr)

<details>
<summary>Changes</summary>

This is the next step to move the CMake cache file builder closer to the build configuration we care about downstream.

---
Full diff: https://github.com/llvm/llvm-project/pull/123568.diff


1 Files Affected:

- (modified) offload/cmake/caches/AMDGPUBot.cmake (+2) 


``````````diff
diff --git a/offload/cmake/caches/AMDGPUBot.cmake b/offload/cmake/caches/AMDGPUBot.cmake
index 69bef91b2ce49e..405abcc28f98d6 100644
--- a/offload/cmake/caches/AMDGPUBot.cmake
+++ b/offload/cmake/caches/AMDGPUBot.cmake
@@ -5,6 +5,7 @@ set(CMAKE_INSTALL_PREFIX /tmp/llvm.install.test CACHE STRING "")
 
 # General settings
 set(CMAKE_BUILD_TYPE Release CACHE STRING "")
+set(BUILD_SHARED_LIBS ON CACHE BOOL "")
 set(CMAKE_C_COMPILER_LAUNCHER ccache CACHE STRING "")
 set(CMAKE_CXX_COMPILER_LAUNCHER ccache CACHE STRING "")
 
@@ -17,3 +18,4 @@ set(LLVM_TARGETS_TO_BUILD "host;AMDGPU" CACHE STRING "")
 set(LLVM_LIT_ARGS "-v --show-unsupported --timeout 100 --show-xfail -j 32" CACHE STRING "")
 
 set(CLANG_DEFAULT_LINKER "lld" CACHE STRING "")
+set(CLANG_DEFAULT_RTLIB "compiler-rt" STRING "")

``````````

</details>


https://github.com/llvm/llvm-project/pull/123568