antlr/runtime/Cpp/CMakeLists.txt

# -*- mode:cmake -*-
cmake_minimum_required (VERSION 2.8)
# 2.8 needed because of ExternalProject

# Detect build type, fallback to release and throw a warning if use didn't specify any
if(NOT CMAKE_BUILD_TYPE)
  message(WARNING "Build type not set, falling back to Release mode.
 To specify build type use:
 -DCMAKE_BUILD_TYPE=<mode> where <mode> is Debug or Release.")
  set(CMAKE_BUILD_TYPE "Release" CACHE STRING
       "Choose the type of build, options are: Debug Release."
       FORCE)
endif(NOT CMAKE_BUILD_TYPE)

if(NOT WITH_DEMO)
  message(STATUS "Building without demo. To enable demo build use: -DWITH_DEMO=True")
  set(WITH_DEMO False CACHE STRING
    "Chose to build with or without demo executable"
    FORCE)
endif(NOT WITH_DEMO)

option(WITH_LIBCXX "Building with clang++ and libc++(in Linux). To enable with: -DWITH_LIBCXX=On" On)

project(LIBANTLR4)

if(CMAKE_VERSION VERSION_EQUAL "3.0.0" OR
   CMAKE_VERSION VERSION_GREATER "3.0.0")
  CMAKE_POLICY(SET CMP0026 OLD)
  CMAKE_POLICY(SET CMP0045 OLD)
  CMAKE_POLICY(SET CMP0042 OLD)
  CMAKE_POLICY(SET CMP0059 OLD)
endif()

if(CMAKE_SYSTEM_NAME MATCHES "Linux")
  find_package(PkgConfig REQUIRED)
  pkg_check_modules(UUID REQUIRED uuid)
endif()
if(APPLE)
  find_library(COREFOUNDATION_LIBRARY CoreFoundation)
endif()

file(STRINGS "VERSION" ANTLR_VERSION)

if (WITH_DEMO)
  # Java is not necessary if building without demos.
  find_package(Java COMPONENTS Runtime REQUIRED)

  if (NOT ANTLR_JAR_LOCATION)
    message(FATAL_ERROR "Missing antlr4.jar location. You can specify it's path using: -DANTLR_JAR_LOCATION=<path>")
  else()
    get_filename_component(ANTLR_NAME ${ANTLR_JAR_LOCATION} NAME_WE)
    if(NOT EXISTS "${ANTLR_JAR_LOCATION}")
      message(FATAL_ERROR "Unable to find ${ANTLR_NAME} in ${ANTLR_JAR_LOCATION}")
    else()
      message(STATUS "Found ${ANTLR_NAME}: ${ANTLR_JAR_LOCATION}")
    endif()
  endif()
endif(WITH_DEMO)

set(MY_CXX_WARNING_FLAGS "  -Wall -pedantic -W")

# Initialize CXXFLAGS.
if("${CMAKE_VERSION}" VERSION_GREATER 3.1.0)
  set(CMAKE_CXX_STANDARD 11)
  set(CMAKE_CXX_STANDARD_REQUIRED ON)
else()
  set(CMAKE_CXX_FLAGS                "${CMAKE_CXX_FLAGS} -std=c++11")
  set(CMAKE_CXX_FLAGS_DEBUG          "${CMAKE_CXX_FLAGS_DEBUG} -std=c++11")
  set(CMAKE_CXX_FLAGS_MINSIZEREL     "${CMAKE_CXX_FLAGS_MINSIZEREL} -std=c++11")
  set(CMAKE_CXX_FLAGS_RELEASE        "${CMAKE_CXX_FLAGS_RELEASE} -std=c++11")
  set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO} -std=c++11")
endif()

set(CMAKE_CXX_FLAGS                "${CMAKE_CXX_FLAGS} -Wall ${MY_CXX_WARNING_FLAGS}")
set(CMAKE_CXX_FLAGS_DEBUG          "${CMAKE_CXX_FLAGS_DEBUG} -O0 -g ${MY_CXX_WARNING_FLAGS}")
set(CMAKE_CXX_FLAGS_MINSIZEREL     "${CMAKE_CXX_FLAGS_MINSIZEREL} -Os -DNDEBUG ${MY_CXX_WARNING_FLAGS}")
set(CMAKE_CXX_FLAGS_RELEASE        "${CMAKE_CXX_FLAGS_RELEASE} -O3 -DNDEBUG ${MY_CXX_WARNING_FLGAS}")
set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO} -O2 -g ${MY_CXX_WARNING_FLAGS}")

# Compiler-specific C++11 activation.
if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "GNU")
    execute_process(
        COMMAND ${CMAKE_CXX_COMPILER} -dumpversion OUTPUT_VARIABLE GCC_VERSION)
    # Just g++-5.0 and greater contain <codecvt> header. (test in ubuntu)
    if (NOT (GCC_VERSION VERSION_GREATER 5.0 OR GCC_VERSION VERSION_EQUAL 5.0))
        message(FATAL_ERROR "${PROJECT_NAME} requires g++ 5.0 or greater.")
    endif ()
elseif ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang" AND APPLE)
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -stdlib=libc++")
elseif ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang" AND CMAKE_SYSTEM_NAME MATCHES "Linux")
    execute_process(
        COMMAND ${CMAKE_CXX_COMPILER} -dumpversion OUTPUT_VARIABLE CLANG_VERSION)
    if (NOT (CLANG_VERSION VERSION_GREATER 4.2.1 OR CLANG_VERSION VERSION_EQUAL 4.2.1))
        message(FATAL_ERROR "${PROJECT_NAME} requires clang 4.2.1 or greater.")
    endif ()
    # You can use libc++ to compile this project when g++ is NOT greater than or equal to 5.0.
    if (WITH_LIBCXX)
        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -stdlib=libc++")
    endif()
else ()
    message(FATAL_ERROR "Your C++ compiler does not support C++11.")
endif ()


add_subdirectory(runtime)
if (WITH_DEMO)
 add_subdirectory(demo)
endif(WITH_DEMO)

install(FILES License.txt README.md VERSION 
        DESTINATION "share/doc/libantlr4")