release-request-655284b0-7f0b-48b5-b01d-27f48a99f2c0-for-git_oc-mr1-release-4017105 snap-temp-L82600000064873863

Change-Id: I3498bddcdd82f82338d6a71f0a1ff13560bbf88b

Author: android-build-team Robot

.arcconfig

@@ -1,4 +1,4 @@
 {
   "project_id" : "libunwind",
-  "conduit_uri" : "http://reviews.llvm.org/"
+  "conduit_uri" : "https://reviews.llvm.org/"
 }

Android.bp

@@ -39,6 +39,7 @@ LIBUNWIND_CPPFLAGS = [
     "-Wextra",
     "-Wno-unused-function",
     "-Wno-unused-parameter",
+    "-Wno-unused-local-typedef",
     "-Werror",
 ]
 

CMakeLists.txt

@@ -2,37 +2,46 @@
 # Setup Project
 #===============================================================================
 
-cmake_minimum_required(VERSION 2.8.8)
+cmake_minimum_required(VERSION 3.4.3)
 
 if (POLICY CMP0042)
   cmake_policy(SET CMP0042 NEW) # Set MACOSX_RPATH=YES by default
 endif()
 
+# Add path for custom modules
+set(CMAKE_MODULE_PATH
+  "${CMAKE_CURRENT_SOURCE_DIR}/cmake"
+  "${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules"
+  ${CMAKE_MODULE_PATH}
+  )
+
 if (CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
   project(libunwind)
 
   # Rely on llvm-config.
   set(CONFIG_OUTPUT)
-  find_program(LLVM_CONFIG "llvm-config")
+  if(NOT LLVM_CONFIG_PATH)
+    find_program(LLVM_CONFIG_PATH "llvm-config")
+  endif()
   if (DEFINED LLVM_PATH)
     set(LLVM_INCLUDE_DIR ${LLVM_INCLUDE_DIR} CACHE PATH "Path to llvm/include")
     set(LLVM_PATH ${LLVM_PATH} CACHE PATH "Path to LLVM source tree")
     set(LLVM_MAIN_SRC_DIR ${LLVM_PATH})
     set(LLVM_CMAKE_PATH "${LLVM_PATH}/cmake/modules")
-  elseif (LLVM_CONFIG)
-    message(STATUS "Found LLVM_CONFIG as ${LLVM_CONFIG}")
-    set(CONFIG_COMMAND ${LLVM_CONFIG} "--includedir" "--prefix" "--src-root")
+  elseif(LLVM_CONFIG_PATH)
+    message(STATUS "Found LLVM_CONFIG_PATH as ${LLVM_CONFIG_PATH}")
+    set(CONFIG_COMMAND ${LLVM_CONFIG_PATH} "--includedir" "--prefix" "--src-root")
     execute_process(COMMAND ${CONFIG_COMMAND}
                     RESULT_VARIABLE HAD_ERROR
                     OUTPUT_VARIABLE CONFIG_OUTPUT)
     if (NOT HAD_ERROR)
       string(REGEX REPLACE "[ \t]*[\r\n]+[ \t]*" ";"
              CONFIG_OUTPUT ${CONFIG_OUTPUT})
-    else ()
+    else()
       string(REPLACE ";" " " CONFIG_COMMAND_STR "${CONFIG_COMMAND}")
       message(STATUS "${CONFIG_COMMAND_STR}")
       message(FATAL_ERROR "llvm-config failed with status ${HAD_ERROR}")
-    endif ()
+    endif()
 
     list(GET CONFIG_OUTPUT 0 INCLUDE_DIR)
     list(GET CONFIG_OUTPUT 1 LLVM_OBJ_ROOT)
@@ -41,51 +50,63 @@ if (CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
     set(LLVM_INCLUDE_DIR ${INCLUDE_DIR} CACHE PATH "Path to llvm/include")
     set(LLVM_BINARY_DIR ${LLVM_OBJ_ROOT} CACHE PATH "Path to LLVM build tree")
     set(LLVM_MAIN_SRC_DIR ${MAIN_SRC_DIR} CACHE PATH "Path to LLVM source tree")
-    set(LLVM_CMAKE_PATH "${LLVM_BINARY_DIR}/share/llvm/cmake")
     set(LLVM_LIT_PATH "${LLVM_PATH}/utils/lit/lit.py")
-  else ()
+
+    # --cmakedir is supported since llvm r291218 (4.0 release)
+    execute_process(
+      COMMAND ${LLVM_CONFIG_PATH} --cmakedir
+      RESULT_VARIABLE HAD_ERROR
+      OUTPUT_VARIABLE CONFIG_OUTPUT
+      ERROR_QUIET)
+    if(NOT HAD_ERROR)
+      string(STRIP "${CONFIG_OUTPUT}" LLVM_CMAKE_PATH)
+    else()
+      set(LLVM_CMAKE_PATH
+          "${LLVM_BINARY_DIR}/lib${LLVM_LIBDIR_SUFFIX}/cmake/llvm")
+    endif()
+  else()
     message(FATAL_ERROR "llvm-config not found and LLVM_MAIN_SRC_DIR not defined. "
                         "Reconfigure with -DLLVM_CONFIG=path/to/llvm-config "
                         "or -DLLVM_PATH=path/to/llvm-source-root.")
-  endif ()
+  endif()
 
   if (EXISTS ${LLVM_CMAKE_PATH})
     list(APPEND CMAKE_MODULE_PATH "${LLVM_CMAKE_PATH}")
     include("${LLVM_CMAKE_PATH}/AddLLVM.cmake")
     include("${LLVM_CMAKE_PATH}/HandleLLVMOptions.cmake")
-  else ()
+  else()
     message(FATAL_ERROR "Not found: ${LLVM_CMAKE_PATH}")
-  endif ()
+  endif()
 
   set(PACKAGE_NAME libunwind)
-  set(PACKAGE_VERSION 3.8.0svn)
+  set(PACKAGE_VERSION 5.0.0svn)
   set(PACKAGE_STRING "${PACKAGE_NAME} ${PACKAGE_VERSION}")
   set(PACKAGE_BUGREPORT "[email protected]")
 
   if (EXISTS ${LLVM_MAIN_SRC_DIR}/utils/lit/lit.py)
     set(LLVM_LIT ${LLVM_MAIN_SRC_DIR}/utils/lit/lit.py)
-  else ()
+  else()
     # Seek installed Lit.
     find_program(LLVM_LIT "lit.py" ${LLVM_MAIN_SRC_DIR}/utils/lit
                  DOC "Path to lit.py")
-  endif ()
+  endif()
 
   if (LLVM_LIT)
     # Define the default arguments to use with 'lit', and an option for the user
     # to override.
     set(LIT_ARGS_DEFAULT "-sv")
     if (MSVC OR XCODE)
       set(LIT_ARGS_DEFAULT "${LIT_ARGS_DEFAULT} --no-progress-bar")
-    endif ()
+    endif()
     set(LLVM_LIT_ARGS "${LIT_ARGS_DEFAULT}" CACHE STRING "Default options for lit")
 
     # On Win32 hosts, provide an option to specify the path to the GnuWin32 tools.
     if (WIN32 AND NOT CYGWIN)
       set(LLVM_LIT_TOOLS_DIR "" CACHE PATH "Path to GnuWin32 tools")
-    endif ()
-  else ()
+    endif()
+  else()
     set(LLVM_INCLUDE_TESTS OFF)
-  endif ()
+  endif()
 
   set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib${LLVM_LIBDIR_SUFFIX})
   set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib${LLVM_LIBDIR_SUFFIX})
@@ -97,15 +118,37 @@ endif()
 #===============================================================================
 # Setup CMake Options
 #===============================================================================
+include(HandleCompilerRT)
 
 # Define options.
+option(LIBUNWIND_BUILD_32_BITS "Build 32 bit libunwind" ${LLVM_BUILD_32_BITS})
 option(LIBUNWIND_ENABLE_ASSERTIONS "Enable assertions independent of build mode." ON)
 option(LIBUNWIND_ENABLE_PEDANTIC "Compile with pedantic enabled." ON)
 option(LIBUNWIND_ENABLE_WERROR "Fail and stop if a warning is triggered." OFF)
 option(LIBUNWIND_ENABLE_SHARED "Build libunwind as a shared library." ON)
+option(LIBUNWIND_ENABLE_STATIC "Build libunwind as a static library." ON)
+option(LIBUNWIND_ENABLE_CROSS_UNWINDING "Enable cross-platform unwinding support." OFF)
+option(LIBUNWIND_ENABLE_ARM_WMMX "Enable unwinding support for ARM WMMX registers." OFF)
+option(LIBUNWIND_ENABLE_THREADS "Build libunwind with threading support." ON)
+option(LIBUNWIND_USE_COMPILER_RT "Use compiler-rt instead of libgcc" OFF)
+option(LIBUNWIND_INCLUDE_DOCS "Build the libunwind documentation." ${LLVM_INCLUDE_DOCS})
+
+set(LIBUNWIND_TARGET_TRIPLE "" CACHE STRING "Target triple for cross compiling.")
+set(LIBUNWIND_GCC_TOOLCHAIN "" CACHE PATH "GCC toolchain for cross compiling.")
+set(LIBUNWIND_SYSROOT "" CACHE PATH "Sysroot for cross compiling.")
+
+if (NOT LIBUNWIND_ENABLE_SHARED AND NOT LIBUNWIND_ENABLE_STATIC)
+  message(FATAL_ERROR "libunwind must be built as either a shared or static library.")
+endif()
 
-set(LIBUNWIND_GCC_TOOLCHAIN "" CACHE STRING "GCC toolchain for cross compiling.")
-set(LIBUNWIND_SYSROOT "" CACHE STRING "Sysroot for cross compiling.")
+# Check that we can build with 32 bits if requested.
+if (CMAKE_SIZEOF_VOID_P EQUAL 8 AND NOT WIN32)
+  if (LIBUNWIND_BUILD_32_BITS AND NOT LLVM_BUILD_32_BITS) # Don't duplicate the output from LLVM
+    message(STATUS "Building 32 bits executables and libraries.")
+  endif()
+elseif(LIBUNWIND_BUILD_32_BITS)
+  message(FATAL_ERROR "LIBUNWIND_BUILD_32_BITS=ON is not supported on this platform.")
+endif()
 
 #===============================================================================
 # Configure System
@@ -116,17 +159,15 @@ set(CMAKE_MODULE_PATH
     "${CMAKE_CURRENT_SOURCE_DIR}/cmake"
     ${CMAKE_MODULE_PATH})
 
-# Configure compiler.
-include(config-ix)
-
 set(LIBUNWIND_COMPILER    ${CMAKE_CXX_COMPILER})
 set(LIBUNWIND_SOURCE_DIR  ${CMAKE_CURRENT_SOURCE_DIR})
 set(LIBUNWIND_BINARY_DIR  ${CMAKE_CURRENT_BINARY_DIR})
 set(LIBUNWIND_LIBRARY_DIR ${CMAKE_BINARY_DIR}/lib${LLVM_LIBDIR_SUFFIX})
 
-#===============================================================================
-# Setup Compiler Flags
-#===============================================================================
+set(LIBUNWIND_C_FLAGS "")
+set(LIBUNWIND_CXX_FLAGS "")
+set(LIBUNWIND_COMPILE_FLAGS "")
+set(LIBUNWIND_LINK_FLAGS "")
 
 # Get required flags.
 macro(append_if list condition var)
@@ -135,10 +176,33 @@ macro(append_if list condition var)
   endif()
 endmacro()
 
-set(LIBUNWIND_C_FLAGS "")
-set(LIBUNWIND_CXX_FLAGS "")
-set(LIBUNWIND_COMPILE_FLAGS "")
-set(LIBUNWIND_LINK_FLAGS "")
+macro(add_target_flags_if condition var)
+  if (${condition})
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${var}")
+    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${var}")
+    list(APPEND LIBUNWIND_COMPILE_FLAGS ${var})
+    list(APPEND LIBUNWIND_LINK_FLAGS ${var})
+  endif()
+endmacro()
+
+add_target_flags_if(LIBUNWIND_BUILD_32_BITS "-m32")
+add_target_flags_if(LIBUNWIND_TARGET_TRIPLE
+          "--target=${LIBUNWIND_TARGET_TRIPLE}")
+add_target_flags_if(LIBUNWIND_GCC_TOOLCHAIN
+          "--gcc-toolchain=${LIBUNWIND_GCC_TOOLCHAIN}")
+add_target_flags_if(LIBUNWIND_SYSROOT
+          "--sysroot=${LIBUNWIND_SYSROOT}")
+
+# Configure compiler.
+include(config-ix)
+
+if (LIBUNWIND_USE_COMPILER_RT)
+  list(APPEND LIBUNWIND_LINK_FLAGS "-rtlib=compiler-rt")
+endif()
+
+#===============================================================================
+# Setup Compiler Flags
+#===============================================================================
 
 append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WERROR_FLAG -Werror=return-type)
 
@@ -189,36 +253,71 @@ if (LIBUNWIND_ENABLE_ASSERTIONS)
   # MSVC doesn't like _DEBUG on release builds. See PR 4379.
   if (NOT MSVC)
     list(APPEND LIBUNWIND_COMPILE_FLAGS -D_DEBUG)
-  endif ()
+  endif()
 
   # On Release builds cmake automatically defines NDEBUG, so we
   # explicitly undefine it:
   if (uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE")
     list(APPEND LIBUNWIND_COMPILE_FLAGS -UNDEBUG)
-  endif ()
+  endif()
 else()
   if (NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE")
     list(APPEND LIBUNWIND_COMPILE_FLAGS -DNDEBUG)
-  endif ()
-endif ()
+  endif()
+endif()
+
+# Cross-unwinding
+if (NOT LIBUNWIND_ENABLE_CROSS_UNWINDING)
+  list(APPEND LIBUNWIND_COMPILE_FLAGS -D_LIBUNWIND_IS_NATIVE_ONLY)
+endif()
+
+# Threading-support
+if (NOT LIBUNWIND_ENABLE_THREADS)
+  list(APPEND LIBUNWIND_COMPILE_FLAGS -D_LIBUNWIND_HAS_NO_THREADS)
+endif()
+
+# ARM WMMX register support
+if (LIBUNWIND_ENABLE_ARM_WMMX)
+  # __ARM_WMMX is a compiler pre-define (as per the ACLE 2.0). Clang does not
+  # define this macro for any supported target at present. Therefore, here we
+  # provide the option to explicitly enable support for WMMX registers in the
+  # unwinder.
+  list(APPEND LIBUNWIND_COMPILE_FLAGS -D__ARM_WMMX)
+endif()
 
 # This is the _ONLY_ place where add_definitions is called.
 if (MSVC)
   add_definitions(-D_CRT_SECURE_NO_WARNINGS)
-endif ()
-
-append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_TARGET_TRIPLE
-          "-target ${LIBUNWIND_TARGET_TRIPLE}")
-append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_GCC_TOOLCHAIN
-          "-gcc-toolchain ${LIBUNWIND_GCC_TOOLCHAIN}")
-append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_SYSROOT
-          "--sysroot=${LIBUNWIND_SYSROOT}")
+endif()
 
 #===============================================================================
 # Setup Source Code
 #===============================================================================
 
 include_directories(include)
 
+find_path(
+  LIBUNWIND_LIBCXX_INCLUDES_INTERNAL
+  __libcpp_version
+  PATHS ${LLVM_MAIN_SRC_DIR}/projects/libcxx/include
+        ${LLVM_MAIN_SRC_DIR}/runtimes/libcxx/include
+  NO_DEFAULT_PATH
+)
+if ((NOT LIBUNWIND_STANDALONE_BUILD OR HAVE_LIBCXX) AND
+    IS_DIRECTORY "${LIBUNWIND_LIBCXX_INCLUDES_INTERNAL}")
+  set(LIBUNWIND_CXX_INCLUDE_PATHS_DEFAULT "${LIBUNWIND_LIBCXX_INCLUDES_INTERNAL}")
+endif()
+
+set(LIBUNWIND_CXX_INCLUDE_PATHS "${LIBUNWIND_CXX_INCLUDE_PATHS_DEFAULT}" CACHE PATH
+    "Paths to C++ header directories separated by ';'.")
+
+if (NOT LIBUNWIND_CXX_INCLUDE_PATHS STREQUAL "")
+  list(APPEND LIBUNWIND_CXX_FLAGS -nostdinc++)
+  include_directories("${LIBUNWIND_CXX_INCLUDE_PATHS}")
+endif()
+
 add_subdirectory(src)
 
+if (LIBUNWIND_INCLUDE_DOCS)
+  add_subdirectory(docs)
+endif()