DD4hepBuild.cmake

#=================================================================================
#
#  AIDA Detector description implementation for LCD
#---------------------------------------------------------------------------------
# Copyright (C) Organisation europeenne pour la Recherche nucleaire (CERN)
# All rights reserved.
#
# For the licensing terms see $DD4hepINSTALL/LICENSE.
# For the list of contributors see $DD4hepINSTALL/doc/CREDITS.
#
#=================================================================================

##set(DD4HEP_DEBUG_CMAKE 1)
message ( STATUS "INCLUDING DD4hepBuild.... c++11:${DD4HEP_USE_CXX11} c++14:${DD4HEP_USE_CXX14}" )

include ( CMakeParseArguments )
set ( DD4hepBuild_included ON )
##set ( DD4HEP_DEBUG_CMAKE ON )
##set ( CMAKE_CTEST_COMMAND ${CMAKE_CTEST_COMMAND} --test-output-size-passed 4096 )

#---------------------------------------------------------------------------------------------------
macro(dd4hep_to_parent_scope val)
  set ( ${val} ${${val}} PARENT_SCOPE )
endmacro(dd4hep_to_parent_scope)

find_package(Threads REQUIRED)

#---------------------------------------------------------------------------------------------------
#  MACRO: dd4hep_set_compiler_flags
#
#  Set compiler flags
#
#  \author  M.Frank
#  \version 1.0
#
#---------------------------------------------------------------------------------------------------
macro(dd4hep_set_compiler_flags)
  include(CheckCXXCompilerFlag)

  SET(COMPILER_FLAGS -Wall -Wextra -pedantic -Wshadow -Wformat-security -Wno-long-long -Wdeprecated -fdiagnostics-color=auto)

  # AppleClang/Clang specific warning flags
  if(CMAKE_CXX_COMPILER_ID MATCHES "^(Apple)?Clang$")
    set ( COMPILER_FLAGS ${COMPILER_FLAGS} -Winconsistent-missing-override -Wno-c++1z-extensions -Wheader-hygiene )
  endif()

  FOREACH( FLAG ${COMPILER_FLAGS} )
    ## meed to replace the minus or plus signs from the variables, because it is passed
    ## as a macro to g++ which causes a warning about no whitespace after macro
    ## definition
    STRING(REPLACE "-" "_" FLAG_WORD ${FLAG} )
    STRING(REPLACE "+" "P" FLAG_WORD ${FLAG_WORD} )

    CHECK_CXX_COMPILER_FLAG( "${FLAG}" CXX_FLAG_WORKS_${FLAG_WORD} )
    IF( ${CXX_FLAG_WORKS_${FLAG_WORD}} )
      MESSAGE ( STATUS "Adding ${FLAG} to CXX_FLAGS" )
      SET ( CMAKE_CXX_FLAGS "${FLAG} ${CMAKE_CXX_FLAGS} ")
    ELSE()
      MESSAGE ( STATUS "NOT Adding ${FLAG} to CXX_FLAGS" )
    ENDIF()
  ENDFOREACH()

  CHECK_CXX_COMPILER_FLAG("-std=c++14" CXX_FLAG_WORKS_CXX14)
  CHECK_CXX_COMPILER_FLAG("-std=c++11" CXX_FLAG_WORKS_CXX11)
  CHECK_CXX_COMPILER_FLAG("-ftls-model=global-dynamic" CXX_FLAG_WORKS_FTLS_global_dynamic)

  if (NOT CXX_FLAG_WORKS_CXX11)
    message( FATAL_ERROR "The provided compiler does not support the C++11 standard" )
  endif()

  if (NOT CXX_FLAG_WORKS_FTLS_global_dynamic)
    message( FATAL_ERROR "The provided compiler does not support the flag -ftls-model=global-dynamic" )
  endif()

  if ( DD4HEP_USE_CXX14 )
    set ( CMAKE_CXX_FLAGS "-std=c++14 -ftls-model=global-dynamic ${CMAKE_CXX_FLAGS} ")
    set ( DD4HEP_USE_CXX11 OFF ) 
    set ( DD4HEP_USE_STDCXX 14 )
    add_definitions(-DDD4HEP_USE_STDCXX=14)
  else()
    set ( CMAKE_CXX_FLAGS "-std=c++11 -ftls-model=global-dynamic ${CMAKE_CXX_FLAGS} ")
    set ( DD4HEP_USE_CXX14 OFF )
    set ( DD4HEP_USE_STDCXX 11 )
    add_definitions(-DDD4HEP_USE_STDCXX=11)
  endif()

  if ( THREADS_HAVE_PTHREAD_ARG )
    set ( CMAKE_CXX_FLAGS           "${CMAKE_CXX_FLAGS} -pthread")
    SET ( CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -pthread")
  elif ( CMAKE_THREAD_LIBS_INIT )
    SET ( CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} ${CMAKE_THREAD_LIBS_INIT}")
  endif()

  if( ("${CMAKE_CXX_COMPILER_ID}" EQUAL "Clang") OR ("${CMAKE_CXX_COMPILER_ID}" EQUAL "GNU") )
    SET ( CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -Wl,--no-undefined")
  endif()

  if("${CMAKE_CXX_COMPILER_ID}" EQUAL "AppleClang")
    SET ( CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -Wl,-undefined,error")
  endif()

 #rpath treatment
 if (APPLE)
   # use, i.e. don't skip the full RPATH for the build tree
   SET(CMAKE_SKIP_BUILD_RPATH  FALSE)

   # when building, don't use the install RPATH already
   # (but later on when installing)
   SET(CMAKE_BUILD_WITH_INSTALL_RPATH FALSE)

   SET(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_PREFIX}/lib")

   # add the automatically determined parts of the RPATH
   # which point to directories outside the build tree to the install RPATH
   SET(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE)

   # the RPATH to be used when installing, but only if it's not a system directory
   LIST(FIND CMAKE_PLATFORM_IMPLICIT_LINK_DIRECTORIES "${CMAKE_INSTALL_PREFIX}/lib" isSystemDir)
   IF("${isSystemDir}" STREQUAL "-1")
     SET(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_PREFIX}/lib")
   ENDIF("${isSystemDir}" STREQUAL "-1")
 endif()
endmacro(dd4hep_set_compiler_flags)

#---------------------------------------------------------------------------------------------------
#  dd4hep_debug
#
#  Print messages if debug flag is enabled
#
#  \author  M.Frank
#  \version 1.0
#
#---------------------------------------------------------------------------------------------------
function ( dd4hep_debug msg )
  if( NOT "${DD4HEP_DEBUG_CMAKE}" STREQUAL "" ) 
    get_property(pkg DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR} PROPERTY PACKAGE_NAME)
    string ( LENGTH "${msg}" lmsg ) 
    if ( ${lmsg} GREATER 1024 )
      string ( SUBSTRING "${msg}" 0 132 pmsg ) 
      message( STATUS "D++> [${pkg}] ${pmsg}" )
    else()
      message( STATUS "D++> [${pkg}] ${msg}" )
    endif()
  endif()
endfunction( dd4hep_debug )

#---------------------------------------------------------------------------------------------------
#  dd4hep_include_directories
#
#  Same as include_directories but treat all external packages as SYSTEM -> no warnings
#
#  \author  A.Sailer
#  \version 1.0
#
#---------------------------------------------------------------------------------------------------
function ( dd4hep_include_directories pkg_incs )
  FOREACH( INCDIR ${pkg_incs} )
    string(FIND "${INCDIR}" "${CMAKE_SOURCE_DIR}" out)
    IF("${out}" EQUAL 0)
      INCLUDE_DIRECTORIES( ${INCDIR} )
    ELSE()
      INCLUDE_DIRECTORIES( SYSTEM ${INCDIR} )
    ENDIF()
  ENDFOREACH()
endfunction( dd4hep_include_directories )

#---------------------------------------------------------------------------------------------------
#  dd4hep_print
#
#
#  \author  M.Frank
#  \version 1.0
#
#---------------------------------------------------------------------------------------------------
function ( dd4hep_print msg )
  message ( STATUS ${msg} )
endfunction ( dd4hep_print )

function ( dd4hep_skipmsg msg )
  message ( STATUS "SKIPPED !!!!!!!!!!!!!!  ${msg}" )
endfunction ( dd4hep_skipmsg )

#---------------------------------------------------------------------------------------------------
#  dd4hep_fatal
#
#
#  \author  M.Frank
#  \version 1.0
#
#---------------------------------------------------------------------------------------------------
function ( dd4hep_fatal msg )
  get_property(pkg DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR} PROPERTY PACKAGE_NAME)
  if ( "${pkg}" STREQUAL "" )
    message ( FATAL_ERROR "++> ${msg}" )
  else()
    message ( FATAL_ERROR "++> [${pkg}] ${msg}" )
  endif()
endfunction ( dd4hep_fatal )

#---------------------------------------------------------------------------------------------------