[CMake] Distribution builds for LLDB standalone

Summary:
Enable `distribution` and `install-distribution` targets in LLDB standalone and pre-populate the cache accordingly on macOS.
Documentation for distribution builds is here: https://llvm.org/docs/BuildingADistribution.html

Reviewers: xiaobai, mgorny, JDevlieghere, davide, compnerd

Reviewed By: xiaobai, JDevlieghere

Subscribers: lldb-commits, #lldb

Tags: #lldb

Differential Revision: https://reviews.llvm.org/D64399

llvm-svn: 365616

lldb/CMakeLists.txt

@@ -216,3 +216,7 @@ if (NOT LLDB_DISABLE_PYTHON)
             COMMENT "Copying Python DLL to LLDB binaries directory.")
     endif ()
 endif ()
+
+if(LLDB_BUILT_STANDALONE)
+  llvm_distribution_add_targets()
+endif()

lldb/cmake/caches/Apple-lldb-macOS.cmake

@@ -15,5 +15,13 @@ set(LLDB_FRAMEWORK_INSTALL_DIR /Applications/Xcode.app/Contents/SharedFrameworks
 
 # Release builds may change these:
 set(CMAKE_OSX_DEPLOYMENT_TARGET 10.11 CACHE STRING "")
-set(LLDB_USE_SYSTEM_DEBUGSERVER ON CACHE BOOL "")
+set(LLDB_USE_SYSTEM_DEBUGSERVER OFF CACHE BOOL "")
 set(LLVM_EXTERNALIZE_DEBUGINFO OFF CACHE BOOL "")
+
+set(LLVM_DISTRIBUTION_COMPONENTS
+  lldb
+  liblldb
+  lldb-argdumper
+  darwin-debug
+  debugserver
+  CACHE STRING "")

lldb/cmake/modules/LLDBStandalone.cmake

@@ -85,6 +85,7 @@ if (CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
   include(TableGen)
   include(HandleLLVMOptions)
   include(CheckAtomic)
+  include(LLVMDistributionSupport)
 
   if (PYTHON_EXECUTABLE STREQUAL "")
     set(Python_ADDITIONAL_VERSIONS 3.5 3.4 3.3 3.2 3.1 3.0 2.7 2.6 2.5)