# This is the top-level CMakeLists.txt file for the Clazy project.
#
# To build the man page from POD, run 'make man' after CMake (assumes perl is available)
# To install the resulting man page, run 'make install'
# The man page is not available on Windows.
#

project(ClangLazy)

cmake_minimum_required(VERSION 3.3)
include(FeatureSummary)
include(GenerateExportHeader)
include("GNUInstallDirs")

# Version setup
set(CLAZY_VERSION_MAJOR "1")
set(CLAZY_VERSION_MINOR "4")
set(CLAZY_VERSION_PATCH "0")
set(CLAZY_VERSION "${CLAZY_VERSION_MAJOR}.${CLAZY_VERSION_MINOR}.${CLAZY_VERSION_PATCH}")
set(CLAZY_PRINT_VERSION "${CLAZY_VERSION_MAJOR}.${CLAZY_VERSION_MINOR}")

set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${CMAKE_CURRENT_LIST_DIR}/cmake)
if (NOT CLAZY_BUILD_WITH_CLANG)
  find_package(Clang 3.9 MODULE REQUIRED)
endif()

set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)

add_definitions(-D__STDC_LIMIT_MACROS -D__STDC_CONSTANT_MACROS)
add_definitions(-D_GNU_SOURCE -DHAVE_CLANG_CONFIG_H)

option(CLAZY_BUILD_UTILS_LIB "Enable this option to build a library so you can reuse clazy's utility functions" OFF)
option(CLAZY_AST_MATCHERS_CRASH_WORKAROUND "Disable AST Matchers if being built with clang. See bug #392223" ON)

if (CLAZY_AST_MATCHERS_CRASH_WORKAROUND AND "${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
    message("Enabling AST Matchers workaround. Consider building with gcc instead. See bug #392223.")
    add_definitions(-DCLAZY_DISABLE_AST_MATCHERS)
endif()

if(CLAZY_BUILD_UTILS_LIB)
  add_definitions(-DCLAZY_BUILD_UTILS_LIB)
endif()

if(NOT CLAZY_BUILD_WITH_CLANG AND MSVC AND NOT CLANG_LIBRARY_IMPORT)
  message(FATAL_ERROR "\nOn MSVC you need to pass -DCLANG_LIBRARY_IMPORT=C:/path/to/llvm-build/lib/clang.lib to cmake when building Clazy.\nAlso make sure you've built LLVM with -DLLVM_EXPORT_SYMBOLS_FOR_PLUGINS=ON")
endif()

if(MSVC)
  # disable trigger-happy warnings from Clang/LLVM headers
  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /wd4267 /wd4244 /wd4291 /wd4800 /wd4141 /wd4146 /wd4251")
elseif(CMAKE_COMPILER_IS_GNUCXX OR CMAKE_CXX_COMPILER_ID MATCHES "Clang")
  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -fno-common -Woverloaded-virtual -Wcast-qual -fno-strict-aliasing -pedantic -Wno-long-long -Wall -W -Wno-unused-parameter -Wwrite-strings -fno-exceptions -fno-rtti")
endif()

set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} -Wl,-flat_namespace -Wl,-undefined -Wl,suppress")
if(WIN32)
  add_definitions(-D_CRT_SECURE_NO_WARNINGS)
else()
  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fPIC")
endif()

# Look for std::regex support
message("Looking for std::regex support...")
try_run(RUN_RESULT COMPILE_RESULT ${CMAKE_BINARY_DIR} ${CMAKE_CURRENT_LIST_DIR}/.cmake_has_regex_test.cpp)

if(RUN_RESULT EQUAL 0)
  set(HAS_STD_REGEX TRUE)
else()
  set(HAS_STD_REGEX FALSE)
  add_definitions(-DNO_STD_REGEX)
  message("old-style-connect check is disabled due to missing std::regex support")
  message("Suppressions are disabled due to missing std::regex support")
endif()

include(ClazySources.cmake)

include_directories(${CMAKE_BINARY_DIR})
include_directories(${CLANG_INCLUDE_DIRS} ${CMAKE_CURRENT_LIST_DIR} ${CMAKE_CURRENT_LIST_DIR}/src)
link_directories("${LLVM_INSTALL_PREFIX}/lib" ${LLVM_LIBRARY_DIRS})

macro(link_to_llvm name is_standalone)
  foreach(clang_lib ${CLANG_LIBS})
    if(MSVC)
      get_filename_component(LIB_FILENAME ${clang_lib} NAME)
      if(LIB_FILENAME STREQUAL "clangFrontend.lib")
        # On MSVC we don't link against clangFrontend.lib, instead we link against clang.exe (via clang.lib)
        # Otherwise the clazy plugin would have it's own plugin registry and clang wouldn't see it.
        # This way clazy registers with clang.
        continue()
      endif()
    endif()

    target_link_libraries(${name} ${clang_lib})
  endforeach()

  foreach(llvm_lib ${LLVM_LIBS})
    if(NOT ${is_standalone} AND NOT APPLE AND NOT MINGW AND NOT MSVC)
        ## Don't link against LLVMSupport, causes: CommandLine Error: Option 'view-background' registered more than once!
        if (NOT llvm_lib MATCHES ".*LLVMSupport.*")
            target_link_libraries(${name} ${llvm_lib})
        endif()
    else()
        target_link_libraries(${name} ${llvm_lib})
    endif()
  endforeach()

  foreach(user_lib ${USER_LIBS})
    target_link_libraries(${name} ${user_lib})
  endforeach()

  foreach(llvm_system_lib ${LLVM_SYSTEM_LIBS})
    target_link_libraries(${name} ${llvm_system_lib})
  endforeach()

  if(WIN32)
    target_link_libraries(${name} version.lib)
  endif()
endmacro()

macro(add_clang_plugin name)
  set(srcs ${ARGN})

  add_library(${name} SHARED ${srcs})

  if(SYMBOL_FILE)
    set_target_properties(${name} PROPERTIES LINK_FlAGS "-exported_symbols_list ${SYMBOL_FILE}")
  endif()

  link_to_llvm(${name} FALSE)

  if(MSVC)
    target_link_libraries(${name} ${CLANG_LIBRARY_IMPORT}) # Link against clang.exe to share the plugin registry
  endif()

  if(CLAZY_BUILD_UTILS_LIB)
    target_link_libraries(${name} clazylib)
  endif()
endmacro()

if(CLAZY_BUILD_UTILS_LIB)
  # clazylib version
  set(clazylib_VERSION_MAJOR 0)
  set(clazylib_VERSION_MINOR 1)
  # Enable the full x.y.z version only for release versions
  set(clazylib_VERSION_PATCH 0)

  set(clazylib_VERSION ${clazylib_VERSION_MAJOR}.${clazylib_VERSION_MINOR})
  add_library(clazylib SHARED ${CLAZY_LIB_SRC})
  link_to_llvm(clazylib FALSE)
  generate_export_header(clazylib)
  set_target_properties(clazylib PROPERTIES VERSION ${clazylib_VERSION} SOVERSION ${clazylib_VERSION_MAJOR})
  install(TARGETS clazylib EXPORT LibClazyExport
    RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
    ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
  )
endif()

set(SYMBOL_FILE Lazy.exports)

if (NOT CLAZY_BUILD_WITH_CLANG)
  add_clang_plugin(ClangLazy ${CLAZY_PLUGIN_SRCS})
  set_target_properties(ClangLazy PROPERTIES
    LINKER_LANGUAGE CXX
    PREFIX ""
  )

  install(TARGETS ClangLazy
    RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
    ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
  )

  set(SHARE_INSTALL_DIR ${CMAKE_INSTALL_DATAROOTDIR} CACHE STRING "Share directory name")

  if(NOT WIN32)
    configure_file(${CMAKE_CURRENT_LIST_DIR}/clazy.cmake ${CMAKE_BINARY_DIR}/clazy @ONLY)
    install(FILES ${CMAKE_BINARY_DIR}/clazy DESTINATION bin PERMISSIONS OWNER_WRITE OWNER_EXECUTE OWNER_READ GROUP_EXECUTE GROUP_READ WORLD_READ WORLD_EXECUTE)
  else()
    install(FILES ${CMAKE_CURRENT_LIST_DIR}/clazy.bat DESTINATION bin PERMISSIONS OWNER_WRITE OWNER_EXECUTE OWNER_READ GROUP_EXECUTE GROUP_READ WORLD_READ WORLD_EXECUTE)
    if(MSVC)
      install(FILES ${CMAKE_CURRENT_LIST_DIR}/clazy-cl.bat DESTINATION bin PERMISSIONS OWNER_WRITE OWNER_EXECUTE OWNER_READ GROUP_EXECUTE GROUP_READ WORLD_READ WORLD_EXECUTE)
    endif()
  endif()

  # Install the explanation README's
  set(DOC_INSTALL_DIR ${SHARE_INSTALL_DIR}/doc/clazy)

  include(${CMAKE_CURRENT_LIST_DIR}/readmes.cmake)

  install(FILES ${README_LEVEL0_FILES} DESTINATION ${DOC_INSTALL_DIR}/level0)
  install(FILES ${README_LEVEL1_FILES} DESTINATION ${DOC_INSTALL_DIR}/level1)
  install(FILES ${README_LEVEL2_FILES} DESTINATION ${DOC_INSTALL_DIR}/level2)
  install(FILES ${README_LEVEL3_FILES} DESTINATION ${DOC_INSTALL_DIR}/level3)
  install(FILES ${README_manuallevel_FILES} DESTINATION ${DOC_INSTALL_DIR}/manuallevel)

  # Install more doc files
  install(FILES README.md COPYING-LGPL2.txt checks.json DESTINATION ${DOC_INSTALL_DIR})

  # Build docs
  set(MAN_INSTALL_DIR "${SHARE_INSTALL_DIR}/man/man1")
  add_subdirectory(docs)

  if(CLAZY_BUILD_UTILS_LIB)
    # Install public headers
    set(CLAZY_LIB_INCLUDES
      src/AccessSpecifierManager.h
      src/checkbase.h
      src/checkmanager.h
      src/clazy_export.h
      src/clazy_stl.h
      src/ContextUtils.h
      src/FixItUtils.h
      src/HierarchyUtils.h
      src/LoopUtils.h
      src/MacroUtils.h
      src/QtUtils.h
      src/SuppressionManager.h
      src/StmtBodyRange.h
      src/StringUtils.h
      src/TemplateUtils.h
      src/TypeUtils.h
      src/Utils.h
      src/ClazyContext.h
      )
    install(FILES ${CLAZY_LIB_INCLUDES} DESTINATION include/clazy)
  endif()

  # rpath
  set(CMAKE_SKIP_BUILD_RPATH FALSE)
  set(CMAKE_BUILD_WITH_INSTALL_RPATH FALSE)
  set(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR}")
  set(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE)
  list(FIND CMAKE_PLATFORM_IMPLICIT_LINK_DIRECTORIES "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR}" isSystemDir)
  if("${isSystemDir}" STREQUAL "-1")
    set(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR}")
  endif("${isSystemDir}" STREQUAL "-1")

  # Build clazy-standalone
  add_executable(clazy-standalone ${CLAZY_STANDALONE_SRCS})

  if(MSVC)
    # On MSVC clang-standalone crashes with a meaningless backtrace if linked to ClangLazy.dll
    target_link_libraries(clazy-standalone clangFrontend)
  else()
    target_link_libraries(clazy-standalone ClangLazy)
  endif()

  link_to_llvm(clazy-standalone TRUE)

  install(TARGETS clazy-standalone DESTINATION bin PERMISSIONS OWNER_WRITE OWNER_EXECUTE OWNER_READ GROUP_EXECUTE GROUP_READ WORLD_READ WORLD_EXECUTE)

  set(CPACK_PACKAGE_VERSION_MAJOR ${CLAZY_VERSION_MAJOR})
  set(CPACK_PACKAGE_VERSION_MINOR ${CLAZY_VERSION_MINOR})
  set(CPACK_PACKAGE_VERSION_PATCH ${CLAZY_VERSION_PATCH})
  include(CPack)
else()
  set(LLVM_LINK_COMPONENTS
    Support
    )
  add_clang_library(clazyPlugin
    ${CLAZY_PLUGIN_SRCS}

    LINK_LIBS
    clangFrontend
    clangDriver
    clangCodeGen
    clangSema
    clangAnalysis
    clangRewriteFrontend
    clangRewrite
    clangAST
    clangASTMatchers
    clangParse
    clangLex
    clangBasic
    clangARCMigrate
    clangEdit
    clangFrontendTool
    clangRewrite
    clangSerialization
    clangTooling
    clangStaticAnalyzerCheckers
    clangStaticAnalyzerCore
    clangStaticAnalyzerFrontend
    )
  add_executable(clazy-standalone ${CLAZY_STANDALONE_SRCS})

  target_link_libraries(clazy-standalone clazyPlugin)

  install(TARGETS clazy-standalone DESTINATION bin PERMISSIONS OWNER_WRITE OWNER_EXECUTE OWNER_READ GROUP_EXECUTE GROUP_READ WORLD_READ WORLD_EXECUTE)
endif()