From 51ea7a333ae96e0d66629675b16d731a59f569ba Mon Sep 17 00:00:00 2001
From: Khem Raj <raj.khem@gmail.com>
Date: Thu, 19 May 2016 23:11:45 -0700
Subject: [PATCH] compiler-rt: Simplify cross-compilation. Don't use
 native-compiled llvm-config.

    Note: AddLLVM.cmake does not expose the LLVM source directory.
    So if you want to run the test suite, you need to either:

    1) set LLVM_MAIN_SRC_DIR explicitly (to find lit.py)
    2) change AddLLVM.cmake to point to an installed 'lit'.
    3) add_subdirectory(compiler-rt/test) from clang instead of compiler-rt.

https://us.codeaurora.org/patches/quic/llvm/50683/compiler-rt-cross-compilation.patch

Signed-off-by: Greg Fitzgerald <gregf@codeaurora.org>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
---
 compiler-rt/CMakeLists.txt | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/compiler-rt/CMakeLists.txt b/compiler-rt/CMakeLists.txt
index 8d768a404f2..1b1a29dc25a 100644
--- a/compiler-rt/CMakeLists.txt
+++ b/compiler-rt/CMakeLists.txt
@@ -74,7 +74,16 @@ set(COMPILER_RT_BAREMETAL_BUILD OFF CACHE BOOL
   "Build for a bare-metal target.")
 
 if (COMPILER_RT_STANDALONE_BUILD)
-  load_llvm_config()
+  find_package(LLVM REQUIRED)
+  list(APPEND CMAKE_MODULE_PATH "${LLVM_CMAKE_DIR}")
+
+  # Variables that AddLLVM.cmake depends on (included by AddCompilerRT)
+  set(LLVM_TOOLS_BINARY_DIR "${LLVM_INSTALL_PREFIX}/bin")
+  set(LLVM_LIBRARY_DIR "${LLVM_INSTALL_PREFIX}/lib")
+
+  set(LLVM_LIBRARY_OUTPUT_INTDIR
+    ${CMAKE_BINARY_DIR}/${CMAKE_CFG_INTDIR}/lib${LLVM_LIBDIR_SUFFIX})
+
   if (TARGET intrinsics_gen)
     # Loading the llvm config causes this target to be imported so place it
     # under the appropriate folder in an IDE.