From 4976771e1178330334d2134eba55c64a37d56f0e Mon Sep 17 00:00:00 2001
From: Louis Dionne <ldionne@apple.com>
Date: Thu, 18 Jun 2020 14:04:01 -0400
Subject: [PATCH] [libc++] Add a dummy CMake file to include runtime
 subprojects

Add a simple CMakeLists.txt to build the runtimes in lockstep without
building all of LLVM. See [1] for details.

[1]: http://lists.llvm.org/pipermail/llvm-dev/2020-June/142384.html
---
 libcxx/utils/ci/apple-install-libcxx.sh |  2 +-
 libcxx/utils/ci/runtimes/CMakeLists.txt | 26 ++++++++++++++++++++++++++
 2 files changed, 27 insertions(+), 1 deletion(-)
 create mode 100644 libcxx/utils/ci/runtimes/CMakeLists.txt

diff --git a/libcxx/utils/ci/apple-install-libcxx.sh b/libcxx/utils/ci/apple-install-libcxx.sh
index 94997ef..ae20bf3 100755
--- a/libcxx/utils/ci/apple-install-libcxx.sh
+++ b/libcxx/utils/ci/apple-install-libcxx.sh
@@ -114,7 +114,7 @@ for arch in ${architectures}; do
     step "Building libc++.dylib and libc++abi.dylib for architecture ${arch}"
     mkdir -p "${build_dir}/${arch}"
     (cd "${build_dir}/${arch}" &&
-        xcrun --sdk "${sdk}" cmake "${llvm_root}/llvm" \
+        xcrun --sdk "${sdk}" cmake "${llvm_root}/libcxx/utils/ci/runtimes" \
             -GNinja \
             -DCMAKE_MAKE_PROGRAM="$(xcrun --sdk "${sdk}" --find ninja)" \
             -DLLVM_ENABLE_PROJECTS="libcxx;libcxxabi" \
diff --git a/libcxx/utils/ci/runtimes/CMakeLists.txt b/libcxx/utils/ci/runtimes/CMakeLists.txt
new file mode 100644
index 0000000..43ebf9e
--- /dev/null
+++ b/libcxx/utils/ci/runtimes/CMakeLists.txt
@@ -0,0 +1,26 @@
+cmake_minimum_required(VERSION 3.4.3)
+
+if(POLICY CMP0068)
+  cmake_policy(SET CMP0068 NEW)
+  set(CMAKE_BUILD_WITH_INSTALL_NAME_DIR ON)
+endif()
+
+if(POLICY CMP0075)
+  cmake_policy(SET CMP0075 NEW)
+endif()
+
+if(POLICY CMP0077)
+  cmake_policy(SET CMP0077 NEW)
+endif()
+
+set(PACKAGE_VERSION "11.0.0git")
+
+project(LLVM_RUNTIMES)
+
+# Include individual projects
+set(LLVM_ENABLE_PROJECTS "" CACHE STRING "Semicolon-separated list of runtimes to build.")
+
+set(LLVM_UMBRELLA_ROOT "${CMAKE_CURRENT_SOURCE_DIR}/../../../..")
+foreach(project IN LISTS LLVM_ENABLE_PROJECTS)
+    add_subdirectory("${LLVM_UMBRELLA_ROOT}/${project}" "${CMAKE_CURRENT_BINARY_DIR}/${project}")
+endforeach()
-- 
2.7.4