libunwind: add new build logic
This replicates most of the build infrastructure from libc++abi ported to
libunwind. This allows building libunwind without requiring libc++abi.
git-svn-id: https://llvm.org/svn/llvm-project/libunwind/trunk@235795 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 0000000..f8a8cc8
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,225 @@
+#===============================================================================
+# Setup Project
+#===============================================================================
+
+cmake_minimum_required(VERSION 2.8.8)
+
+if (POLICY CMP0042)
+ cmake_policy(SET CMP0042 NEW) # Set MACOSX_RPATH=YES by default
+endif()
+
+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 (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")
+ 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 ${CONFIG_OUTPUT})
+ else ()
+ string(REPLACE ";" " " CONFIG_COMMAND_STR "${CONFIG_COMMAND}")
+ message(STATUS "${CONFIG_COMMAND_STR}")
+ message(FATAL_ERROR "llvm-config failed with status ${HAD_ERROR}")
+ endif ()
+
+ list(GET CONFIG_OUTPUT 0 INCLUDE_DIR)
+ list(GET CONFIG_OUTPUT 1 LLVM_OBJ_ROOT)
+ list(GET CONFIG_OUTPUT 2 MAIN_SRC_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 ()
+ 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 ()
+
+ 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 ()
+ message(FATAL_ERROR "Not found: ${LLVM_CMAKE_PATH}")
+ endif ()
+
+ set(PACKAGE_NAME libunwind)
+ set(PACKAGE_VERSION 3.7.0svn)
+ set(PACKAGE_STRING "${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 ()
+ # Seek installed Lit.
+ find_program(LLVM_LIT "lit.py" ${LLVM_MAIN_SRC_DIR}/utils/lit
+ DOC "Path to lit.py")
+ endif ()
+
+ if (LLVM_LIT)
+ # Define the default arguments to use with 'lit', and an option for the user
+ # to override.
+ set(LIT_ARGS_DEFAULT "-sv")
+ if (MSVC OR XCODE)
+ set(LIT_ARGS_DEFAULT "${LIT_ARGS_DEFAULT} --no-progress-bar")
+ endif ()
+ 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 ()
+ set(LLVM_INCLUDE_TESTS OFF)
+ 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})
+else()
+ set(LLVM_MAIN_SRC_DIR "${CMAKE_SOURCE_DIR}" CACHE PATH "Path to LLVM source tree")
+ set(LLVM_LIT "${CMAKE_SOURCE_DIR}/utils/lit/lit.py")
+endif()
+
+#===============================================================================
+# Setup CMake Options
+#===============================================================================
+
+# Define options.
+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_WERROR "Fail and stop if a warning is triggered." OFF)
+option(LIBUNWIND_ENABLE_SHARED "Build libunwind as a shared library." ON)
+
+set(LIBUNWIND_GCC_TOOLCHAIN "" CACHE STRING "GCC toolchain for cross compiling.")
+set(LIBUNWIND_SYSROOT "" CACHE STRING "Sysroot for cross compiling.")
+
+#===============================================================================
+# Configure System
+#===============================================================================
+
+# Add path for custom modules
+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
+#===============================================================================
+
+# Get required flags.
+macro(append_if list condition var)
+ if (${condition})
+ list(APPEND ${list} ${var})
+ endif()
+endmacro()
+
+set(LIBUNWIND_C_FLAGS "")
+set(LIBUNWIND_CXX_FLAGS "")
+set(LIBUNWIND_COMPILE_FLAGS "")
+set(LIBUNWIND_LINK_FLAGS "")
+
+append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WERROR_FLAG -Werror=return-type)
+
+# Get warning flags
+append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_W_FLAG -W)
+append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WALL_FLAG -Wall)
+append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WCHAR_SUBSCRIPTS_FLAG -Wchar-subscripts)
+append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WCONVERSION_FLAG -Wconversion)
+append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WMISMATCHED_TAGS_FLAG -Wmismatched-tags)
+append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WMISSING_BRACES_FLAG -Wmissing-braces)
+append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WNEWLINE_EOF_FLAG -Wnewline-eof)
+append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WNO_UNUSED_FUNCTION_FLAG -Wno-unused-function)
+append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WSHADOW_FLAG -Wshadow)
+append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WSHORTEN_64_TO_32_FLAG -Wshorten-64-to-32)
+append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WSIGN_COMPARE_FLAG -Wsign-compare)
+append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WSIGN_CONVERSION_FLAG -Wsign-conversion)
+append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WSTRICT_ALIASING_FLAG -Wstrict-aliasing=2)
+append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WSTRICT_OVERFLOW_FLAG -Wstrict-overflow=4)
+append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WUNUSED_PARAMETER_FLAG -Wunused-parameter)
+append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WUNUSED_VARIABLE_FLAG -Wunused-variable)
+append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WWRITE_STRINGS_FLAG -Wwrite-strings)
+append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WUNDEF_FLAG -Wundef)
+
+if (LIBUNWIND_ENABLE_WERROR)
+ append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WERROR_FLAG -Werror)
+ append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WX_FLAG -WX)
+else()
+ append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_WNO_ERROR_FLAG -Wno-error)
+ append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_NO_WX_FLAG -WX-)
+endif()
+
+if (LIBUNWIND_ENABLE_PEDANTIC)
+ append_if(LIBUNWIND_COMPILE_FLAGS LIBUNWIND_HAS_PEDANTIC_FLAG -pedantic)
+endif()
+
+# Get feature flags.
+# Exceptions
+# Catches C++ exceptions only and tells the compiler to assume that extern C
+# functions never throw a C++ exception.
+append_if(LIBUNWIND_CXX_FLAGS LIBUNWIND_HAS_FSTRICT_ALIASING_FLAG -fstrict-aliasing)
+append_if(LIBUNWIND_CXX_FLAGS LIBUNWIND_HAS_EHSC_FLAG -EHsc)
+
+append_if(LIBUNWIND_C_FLAGS LIBUNWIND_HAS_FUNWIND_TABLES -funwind-tables)
+
+# Assert
+string(TOUPPER "${CMAKE_BUILD_TYPE}" uppercase_CMAKE_BUILD_TYPE)
+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 ()
+
+ # 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 ()
+else()
+ if (NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE")
+ list(APPEND LIBUNWIND_COMPILE_FLAGS -DNDEBUG)
+ endif ()
+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}")
+
+#===============================================================================
+# Setup Source Code
+#===============================================================================
+
+include_directories(include)
+
+add_subdirectory(src)
+
