Completely reengineered version of CMake build system (Johny)

[u/mrichter/AliRoot.git] / cmake / ALICE_CMake.cmake

# AliRoot Build System Utility Macro and Function definitions
#
# Author: Johny Jose (johny.jose@cern.ch)
#         Port of previous Makefile build to cmake

cmake_minimum_required(VERSION 2.8 FATAL_ERROR)

macro(ALICE_DevFlagsOutput)

  if(ALICEDEV STREQUAL "YES")
    message(STATUS "FFLAGS    : ${FFLAGS}")
    message(STATUS "CXXFLAGS  : ${CXXFLAGS}")
    message(STATUS "CFLAGS    : ${CFLAGS}")
    message(STATUS "SOFLAGS   : ${SOFLAGS}")
    message(STATUS "LDFLAGS   : ${LDFLAGS}")
    message(STATUS "SHLIB     : ${SHLIB}")
    message(STATUS "SYSLIBS   : ${SYSLIBS}")
    message(STATUS "CINTFLAGS : ${CINTFLAGS}")
  endif(ALICEDEV STREQUAL "YES")

endmacro(ALICE_DevFlagsOutput)

function(ALICE_CleanOutput _output input)

  string(REGEX REPLACE "\n" " " clean ${input})
  set(${_output} ${clean} PARENT_SCOPE)

endfunction(ALICE_CleanOutput)

function(ALICE_CorrectPaths _output value )

  set(corrected)
  foreach(path ${value})
    set(external)
    string(REGEX MATCH "^/" external ${path})
    if(NOT external)
      list(APPEND corrected "${CMAKE_SOURCE_DIR}/${path}" )
    else()
      list(APPEND corrected ${path})
    endif(NOT external)
  endforeach(path)
  set(${_output} ${corrected} PARENT_SCOPE)

endfunction(ALICE_CorrectPaths)

function(ALICE_Format _output prefix suffix input)

# DevNotes - input should be put in quotes or the complete list does not get passed to the function
  set(format)
  foreach(arg ${input})
    set(item ${arg})
    if(prefix)
      string(REGEX MATCH "^${prefix}" pre ${arg})
    endif(prefix)
    if(suffix)
      string(REGEX MATCH "${suffix}$" suf ${arg})
    endif(suffix)
    if(NOT pre)
      set(item "${prefix}${item}")
    endif(NOT pre)
    if(NOT suf)
      set(item "${item}${suffix}")
    endif(NOT suf)
    list(APPEND format ${item})
  endforeach(arg)
  set(${_output} ${format} PARENT_SCOPE)

endfunction(ALICE_Format)

function(ALICE_CheckLibraries _output input)

  set(format)
  foreach(arg ${input})
    set(item ${arg})
    string(REGEX MATCH "^(/|-)" preformatted ${item})
    if(NOT preformatted)
      set(item "-l${item}")
    endif(NOT preformatted)
    list(APPEND format ${item})
  endforeach(arg)
  set(${_output} ${format} PARENT_SCOPE)
  
endfunction(ALICE_CheckLibraries)

function(ALICE_RootConfig _output parameters)

  if(ROOT_CONFIG)
    execute_process(COMMAND ${ROOT_CONFIG} ${parameters} OUTPUT_VARIABLE result ERROR_VARIABLE error OUTPUT_STRIP_TRAILING_WHITESPACE )
    if(error)
      message(FATAL_ERROR "root-config ERROR : ${error}")
    endif(error)
    ALICE_CleanOutput(result "${result}")
    set(${_output} "${result}" PARENT_SCOPE)
  else()
    message(FATAL_ERROR "root-config not found")
  endif(ROOT_CONFIG)

endfunction(ALICE_RootConfig)

macro(ALICE_CheckOutOfSourceBuild)
  
  #Check if previous in-source build failed
  if(EXISTS ${CMAKE_SOURCE_DIR}/CMakeCache.txt OR EXISTS ${CMAKE_SOURCE_DIR}/CMakeFiles)
    message(FATAL_ERROR "CMakeCache.txt or CMakeFiles exists in source directory! Please remove them before running cmake $ALICE_ROOT")
  endif(EXISTS ${CMAKE_SOURCE_DIR}/CMakeCache.txt OR EXISTS ${CMAKE_SOURCE_DIR}/CMakeFiles)
  
  #Get Real Paths of the source and binary directories
  get_filename_component(srcdir "${CMAKE_SOURCE_DIR}" REALPATH)
  get_filename_component(bindir "${CMAKE_BINARY_DIR}" REALPATH)
  
  #Check for in-source builds
  if(${srcdir} STREQUAL ${bindir})
    message(FATAL_ERROR "AliRoot cannot be built in-source! Please run cmake $ALICE_ROOT outside the source directory")
  endif(${srcdir} STREQUAL ${bindir})

endmacro(ALICE_CheckOutOfSourceBuild)

macro(ALICE_ConfigureCompiler)

  if(ALIDEBUG STREQUAL "YES")
    set(ALICE_TARGET ${ALICE_TARGET}DEBUG)
    message("Befor ${CXXFLAGS}")
    string(REGEX MATCHALL "-O[^ ]*" FFLAGS ${FFLAGS})
    string(REGEX MATCHALL "-O[^ ]*" CXXFLAGS ${CXXFLAGS})
    message("After ${CXXFLAGS}")
    string(REGEX MATCHALL "-O[^ ]*" CFLAGS ${CFLAGS})
    string(REGEX MATCHALL "-O[^ ]*" SOFLAGS ${SOFLAGS})
    string(REGEX MATCHALL "-O[^ ]*" LDFLAGS ${LDFLAGS})
    set(FFLAGS "-g ${FFLAGS}")
    set(CXXFLAGS "-g ${CXXFLAGS}")
    set(CFLAGS "-g ${CFLAGS}")
    set(SOFLAGS "-g ${SOFLAGS}")
    set(LDFLAGS "-g ${LDFLAGS}")
  endif(ALIDEBUG STREQUAL "YES")

  if(ALIPROFILE STREQUAL "YES")
    set(ALICE_TARGET ${ALICE_TARGET}PROF)
    set(FFLAGS "-pg ${FFLAGS}")
    set(CXXFLAGS "-pg ${CXXFLAGS}")
    set(CFLAGS "-pg ${CFLAGS}")
    set(SOFLAGS "-pg ${SOFLAGS}")
    set(LDFLAGS "-pg ${LDFLAGS}")
  endif(ALIPROFILE STREQUAL "YES")

  ALICE_RootConfig(RCFLAGS --auxcflags)
  ALICE_RootConfig(RLFLAGS --ldflags)

  set(CXXFLAGS "${CXXFLAGS} ${RCFLAGS}")
  set(CFLAGS  "${CFLAGS} ${RCFLAGS}")
  set(SOFLAGS "${SOFLAGS} ${RLFLAGS}")
  set(LDFLAGS "${LDFLAGS} ${RLFLAGS}")

  if(NOT ALICXXWARN STREQUAL "NO")
    set(CXXFLAGS "${CXXFLAGS} ${CXXWARN}")
  endif(NOT ALICXXWARN STREQUAL "NO")

  set(CXXFLAGS "${DATEFLAGS} ${CXXFLAGS}")
  set(CFLAGS "${DATEFLAGS} ${CFLAGS}")
  set(CINTFLAGS "${DATEFLAGS}")

endmacro(ALICE_ConfigureCompiler)

macro(ALICE_ConfigurePlatform)
  
  ALICE_GetTarget()
  include("CMake${ALICE_TARGET}")
  
endmacro(ALICE_ConfigurePlatform)

macro(ALICE_GetTarget)
  
  #Set ALICE_TARGET if it has not been set yet
  if(NOT ALICE_TARGET)  
    set(ALICE_TARGET $ENV{ALICE_TARGET})
    #If ALICE_TARGET is not defined assign default values
    if(NOT ALICE_TARGET)
      message(WARNING "Environment variable ALICE_TARGET is not set ! Setting to default value.")
      ALICE_RootConfig(ALICE_TARGET --arch)
      message("ALICE_TARGET set to ${ALICE_TARGET}")
    endif(NOT ALICE_TARGET)
  endif(NOT ALICE_TARGET)

endmacro(ALICE_GetTarget) 

macro(ALICE_ResetPackage)

  set(MODDIR ${MODULE})
  set(MODDIRI ${PROJECT_SOURCE_DIR}/${MODULE})

  set(SRCS)
  set(HDRS)
  set(FSRCS)
  set(DHDR)
  set(CSRCS)
  set(CHDRS)
  set(EINCLUDE)
  set(EDEFINE)
  set(ELIBS)
  set(ELIBSDIR)
  set(PACKFFLAGS)
  set(PACKCXXFLAGS)
  set(PACKCFLAGS)
  set(PACKDYFLAGS)
  set(PACKSOFLAGS)
  set(PACKLDFLAGS)
  set(PACKBLIBS)
  set(EXPORT)
  set(EHDRS)
  set(CINTHDRS)
  set(CINTAUTOLINK)
  set(ARLIBS)
  set(SHLIBS)

  #HLT Variables
  set(MODULE_HDRS)
  set(MODULE_SRCS)
  set(MODULE_DHDR)
  set(CLASS_HDRS)
  set(LIBRARY_DEP)
  set(HLTDEFS)
  set(HLTSOFLAGS) 


  set(PSRCS)
  set(PHDRS)
  set(PFSRCS)
  set(PDHDR)
  set(PCSRCS)
  set(PCHDRS)
  set(PEINCLUDE)
  set(PEDEFINE)
  set(PELIBS)
  set(PELIBSDIR)
  set(PPACKFFLAGS)
  set(PPACKCXXFLAGS)
  set(PPACKCFLAGS)
  set(PPACKDYFLAGS)
  set(PPACKSOFLAGS)
  set(PPACKLDFLAGS)
  set(PPACKBLIBS)
  set(PEXPORT)
  set(PEHDRS)
  set(PCINTHDRS)
  set(PCINTAUTOLINK)
  set(PARLIBS)
  set(PSHLIBS)
  set(PDS)

endmacro(ALICE_ResetPackage)

function(ALICE_SetPackageVariable _var ext setvalue unsetvalue )

#DevNotes - setvalue and unsetcalue should both be put in quotes or cmake throws an error if they have undefined values
  if(setvalue)
    set(${_var} ${setvalue} PARENT_SCOPE)
    set(${PACKAGE}${ext} ${setvalue} PARENT_SCOPE)
  else()
    set(${_var} ${unsetvalue} PARENT_SCOPE)
    set(${PACKAGE}${ext} ${unsetvalue} PARENT_SCOPE)
  endif(setvalue)

endfunction(ALICE_SetPackageVariable)

macro(ALICE_BuildPackage)
 
  list(APPEND EINCLUDE STEER) 

  ALICE_SetPackageVariable(PFFLAGS "FFLAGS" "${PACKFFLAGS}" "${FFLAGS}")
  ALICE_SetPackageVariable(PCFLAGS "CFLAGS" "${PACKCFLAGS}" "${CFLAGS}")
  ALICE_SetPackageVariable(PCXXFLAGS "CXXFLAGS" "${PACKCXXFLAGS}" "${CXXFLAGS}")
  ALICE_SetPackageVariable(PSOFLAGS "SOFLAGS" "${PACKSOFLAGS}" "${SOFLAGS}")
  ALICE_SetPackageVariable(PLDFLAGS "LDFLAGS" "${PACKLDFLAGS}" "${LDFLAGS}")
  ALICE_SetPackageVariable(PDCXXFLAGS "DCXXFLAGS" "${PACKDCXXFLAGS}" "${CXXFLAGSNO}")
  ALICE_SetPackageVariable(PBLIBS "BLIBS" "${PACKBLIBS}" "${LIBS}")

  set(WITHDICT)
  if(DHDR OR CINTAUTOLINK)
    set(WITHDICT TRUE)
  endif(DHDR OR CINTAUTOLINK)

  ALICE_SetPackageVariable(PEDEFINE "EDEFINE" "${EDEFINE}" "${EDEFINE}")
  ALICE_SetPackageVariable(PEXPORT "EXPORT" "${EXPORT}" "${EXPORT}")
  ALICE_SetPackageVariable(PEXPORTDEST "EXPORTDEST" "${CMAKE_INCLUDE_EXPORT_DIRECTORY}" "${CMAKE_INCLUDE_EXPORT_DIRECTORY}")
  ALICE_SetPackageVariable(PINC "INC" "${EINCLUDE};${MODULE}" "${EINCLUDE};${MODULE}")
  ALICE_SetPackageVariable(PELIBS "ELIBS" "${ELIBS}" "${ELIBS}")
  ALICE_SetPackageVariable(PELIBSDIR "ELIBSDIR" "${ELIBSDIR}" "${ELIBSDIR}")
  
  ALICE_SetPackageVariable(PCS "CS" "${CSRCS}" "${CSRCS}")
  ALICE_SetPackageVariable(PCH "CH" "${CHDRS}" "${CHDRS}")
  
  ALICE_SetPackageVariable(PFS "FS" "${FSRCS}" "${FSRCS}")

  ALICE_SetPackageVariable(PS "S" "${SRCS}" "${SRCS}")
  ALICE_SetPackageVariable(PH "H" "${HDRS} ${EHDRS}" "${HDRS} ${EHDRS}")
  ALICE_SetPackageVariable(PCINTHDRS "CINTHDRS" "${CINTHDRS}" "${PH}")
  
  string( REPLACE ".h" "" PCINTCLASSES "${PCINTHDRS}")
  set ( ${PACKAGE}CINTCLASSES ${PCINTCLASSES})

  ALICE_SetPackageVariable(PDH "DH" "${DHDR}" "")

  if(CINTAUTOLINK)
    ALICE_SetPackageVariable(PDAL "DAL" "${CMAKE_CURRENT_BINARY_DIR}/G__${PACKAGE}AutoLinkDef.h" "${CMAKE_CURRENT_BINARY_DIR}/G__${PACKAGE}AutoLinkDef.h")
    ALICE_SetPackageVariable(PDH "DH" "${PDAL}" "${PDAL}")
    ALICE_GenerateLinkDef()
  endif(CINTAUTOLINK)

  if(lib)
    list(APPEND ${MODULE}LIBS ${PACKAGE})
    list(APPEND ALLLIBS ${PACKAGE})
    list(APPEND ${MODULE}ALIBS ${PACKAGE}_a)
    list(APPEND ALLALIBS ${PACKAGE}_a)
    list(APPEND BINLIBS ${PACKAGE})
  else()
    list(APPEND ALLEXECS ${PACKAGE})
  endif(lib)

  list(APPEND INCLUDEFILES ${PEXPORTDEST})
  ALICE_CopyHeaders()
  if(WITHDICT)  
    ALICE_SetPackageVariable(PDS "DS" "G__${PACKAGE}.cxx" "G__${PACKAGE}.cxx")
    ALICE_GenerateDictionary()
  else()
    if(lib)
      message(STATUS "No dictionary generated for ${PACKAGE}")  
    endif(lib)
  endif(WITHDICT)
  
  if(PS OR PCS OR PFS)
    if(lib)
      ALICE_BuildLibrary()
    elseif(bin)
      ALICE_BuildExecutable()
    endif(lib)
  endif(PS OR PCS OR PFS)

endmacro(ALICE_BuildPackage)


macro(ALICE_BuildModule)

  add_definitions(-D_MODULE="${MODULE}")
  foreach(PACKAGEFILE ${PACKAGES})
      set(lib)
      set(bin)
      string(REGEX MATCH "CMakelib" lib ${PACKAGEFILE})
      string(REGEX MATCH "CMakebin" bin ${PACKAGEFILE})
      get_filename_component(PACKAGE ${PACKAGEFILE} NAME)
      string(REGEX REPLACE "^CMake(lib|bin)(.*)\\.pkg" "\\2" PACKAGE ${PACKAGE})
      if(ALICEDEV)
        message("Adding package ${PACKAGE} in ${MODULE}")
      endif(ALICEDEV)
      ALICE_ResetPackage()
      include(${PACKAGEFILE})
      ALICE_BuildPackage()
     
      get_property(EXCLUDEPACKAGE TARGET ${PACKAGE} PROPERTY EXCLUDE_FROM_ALL) 
      if(NOT EXCLUDEPACKAGE)
        install(TARGETS ${PACKAGE} 
                RUNTIME DESTINATION bin
                LIBRARY DESTINATION lib
                ARCHIVE DESTINATION bin)
      endif(NOT EXCLUDEPACKAGE)
  endforeach(PACKAGEFILE)

endmacro(ALICE_BuildModule)

macro(ALICE_GenerateDictionary)
 
  if(ALICEDEV STREQUAL "YES")
    message("Generating Dictionary rule for ${PACKAGE}")
    message("${ROOTCINT} -f ${PDS} -c ${PEDEFINE} ${CINTFLAGS} ${PINC} ${PCINTHDRS} ${PDH}")
  endif(ALICEDEV STREQUAL "YES")
 
  # Split up all arguments

  set(DEDEFINE ${PEDEFINE})
  set(DCINTFLAGS ${CINTFLAGS})
  set(DINC ${PINC})
  set(DCINTHDRS ${PCINTHDRS})
  set(DDH ${PDH})
  separate_arguments(DEDEFINE)
  separate_arguments(DCINTFLAGS)
  separate_arguments(DINC)
  separate_arguments(DCINTHDRS)
  separate_arguments(DDH)
  # Format neccesary arguments
  ALICE_Format(DINC "-I" "" "${DINC};${CMAKE_INCLUDE_EXPORT_DIRECTORY}")
  set_source_files_properties(${PDS} PROPERTIES GENERATED TRUE)
  add_custom_command(OUTPUT  ${PDS}
                     COMMAND cd ${PROJECT_SOURCE_DIR} && ${ROOTCINT} -f ${CMAKE_CURRENT_BINARY_DIR}/${PDS} -c -D_MODULE=\\\"${MODULE}\\\" ${DEDEFINE} ${DCINTFLAGS} ${DINC} ${DCINTHDRS} ${DDH}
                     WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
                     DEPENDS ${DCINTHDRS} ${DDH}
                     )
  add_custom_target(G${PACKAGE})
  add_dependencies(G${PACKAGE} ${PDS})

endmacro(ALICE_GenerateDictionary)

macro(ALICE_BuildLibrary)

  ALICE_DevFlagsOutput()
  set(CMAKE_CXX_FLAGS "${PEDEFINE} ${PCXXFLAGS}")
  set(CMAKE_C_FLAGS "${PEDEFINE} ${PCFLAGS}")
  set(CMAKE_Fortran_FLAGS ${PEDEFINE} ${PFFLAGS})
  set(CMAKE_SHARED_LINKER_FLAGS ${PSOFLAGS}) 
  set(CMAKE_MODULE_LINKER_FLAGS ${PLDFLAGS})
  
  
  separate_arguments(PINC)
  separate_arguments(EINCLUDE)
  separate_arguments(PELIBSDIR)
  separate_arguments(PBLIBS)
  separate_arguments(PELIBS)
  separate_arguments(SHLIB)

  ALICE_Format(PELIBSDIR "-L" "" "${PELIBSDIR}")
  ALICE_CheckLibraries(PBLIBS "${PBLIBS}")
  ALICE_CheckLibraries(PELIBS "${PELIBS}")

  ALICE_CorrectPaths(EINCLUDE "${EINCLUDE}")
  ALICE_CorrectPaths(PINC "${PINC}")

  include_directories(SYSTEM ${ROOTINCDIR})
  include_directories(${PINC})  
  include_directories(${EINCLUDE})
  include_directories(${CMAKE_INCLUDE_EXPORT_DIRECTORY})
  
  add_library(${PACKAGE} SHARED ${PCS} ${PFS} ${PS} ${PDS})
  

  if(PELIBS OR SHLIB)
    target_link_libraries(${PACKAGE} ${PELIBSDIR} ${PELIBS} ${SHLIB})
  endif(PELIBS OR SHLIB)
  
  add_dependencies(${MODULE}-all ${PACKAGE})
     
  add_library(${PACKAGE}_a STATIC EXCLUDE_FROM_ALL ${PCS} ${PFS} ${PS} ${PDS})
  if(PELIBS OR ALLIB)
    target_link_libraries(${PACKAGE}_a ${PELIBSDIR} ${PELIBS} ${ALLIB})
  endif(PELIBS OR ALLIB)

  add_dependencies(${MODULE}-static ${PACKAGE}_a)
  if(ALIPROFILE STREQUAL "YES")
    add_dependencies(${MODULE}-all ${MODULE}-static)
  endif(ALIPROFILE STREQUAL "YES")

  list(FIND EXCLUDEMODULES ${MODULE} RESULT)
  if(NOT RESULT STREQUAL "-1")
    message(STATUS "${MODULE} will not be built by default. Type make ${MODULE}-all to build.")
    set_property(TARGET ${PACKAGE} PROPERTY EXCLUDE_FROM_ALL TRUE)
  endif(NOT RESULT STREQUAL "-1")

endmacro(ALICE_BuildLibrary)

macro(ALICE_BuildExecutable)

  ALICE_DevFlagsOutput()
  set(CMAKE_CXX_FLAGS "${PEDEFINE} ${PCXXFLAGS} ${EXEFLAGS}")
  set(CMAKE_C_FLAGS "${PEDEFINE} ${PCFLAGS} ${EXEFLAGS}")
  set(CMAKE_Fortran_FLAGS "${PEDEFINE} ${PFFLAGS} ${EXEFLAGS}")
  set(CMAKE_SHARED_LINKER_FLAGS ${PSOFLAGS}) 
  set(CMAKE_MODULE_LINKER_FLAGS ${PLDFLAGS})
  
  separate_arguments(PINC)
  separate_arguments(EINCLUDE)
  separate_arguments(PELIBSDIR)
  separate_arguments(PBLIBS)
  separate_arguments(PELIBS)
  separate_arguments(SHLIB)

  ALICE_Format(PELIBSDIR "-L" "" "${PELIBSDIR}")
  ALICE_CheckLibraries(PBLIBS "${PBLIBS}")
  #ALICE_CheckLibraries(PELIBS "${PELIBS}")

  ALICE_CorrectPaths(EINCLUDE "${EINCLUDE}")
  ALICE_CorrectPaths(PINC "${PINC}")

  include_directories(SYSTEM ${ROOTINCDIR})
  include_directories(${PINC})  
  include_directories(${EINCLUDE})
  include_directories(${CMAKE_INCLUDE_EXPORT_DIRECTORY})

  if(ALIPROFILE STREQUAL "YES")
    add_executable(${PACKAGE} ${PFS} ${PCS} ${PS} ${PDS})
    if(ARLIBS OR SHLIBS OR PBLIBS OR EXEFLAGS)
      target_link_libraries(${PACKAGE} ${ARLIBS} ${SHLIBS} ${PBLIBS} ${EXEFLAGS})
    endif(ARLIBS OR SHLIBS OR PBLIBS OR EXEFLAGS)
    add_dependencies(${MODULE}-all ${PACKAGE})
  else()
    add_executable(${PACKAGE} ${PFS} ${PCS} ${PS} ${PDS})
    if(PELIBS OR PBLIBS OR EXEFLAGS)
      target_link_libraries(${PACKAGE} ${BINLIBDIRS} ${PELIBSDIR} ${PELIBS} ${PBLIBS} ${EXEFLAGS})
    endif(PELIBS OR PBLIBS OR EXEFLAGS)
    add_dependencies(${MODULE}-all ${PACKAGE})
  endif(ALIPROFILE STREQUAL "YES")

  list(FIND EXCLUDEMODULES ${MODULE} RESULT)
  if(NOT RESULT STREQUAL "-1")
    set_property(TARGET ${PACKAGE} PROPERTY EXCLUDE_FROM_ALL TRUE)
  endif(NOT RESULT STREQUAL "-1")

endmacro(ALICE_BuildExecutable)

macro(ALICE_CopyHeaders)
  
  if(NOT EXPORT )
    set(HEADERS)
  else()
    set(HEADERS ${EXPORT})
  endif(NOT EXPORT)
  foreach(header ${HEADERS})
      configure_file(${header} ${PEXPORTDEST} COPYONLY)
      install(FILES ${header} DESTINATION include)
  endforeach(header)

endmacro(ALICE_CopyHeaders)

macro(ALICE_GenerateLinkDef)

  file (WRITE ${PDAL} "//--------------------------------------------------------------------------------\n")
  file (APPEND ${PDAL} "// This is an automatically generated Root Dictionary Linkdef file for ${PACKAGE}\n")
  file (APPEND ${PDAL} "// !!! DO NOT EDIT THIS FILE !!!\n")
  file (APPEND ${PDAL} "#ifdef __CINT__\n")
  file (APPEND ${PDAL} "#pragma link off all globals;\n")
  file (APPEND ${PDAL} "#pragma link off all classes;\n")
  file (APPEND ${PDAL} "#pragma link off all functions;\n")
  foreach (class ${PCINTCLASSES})
    get_filename_component(classname ${class} NAME)
    file(APPEND ${PDAL} "#pragma link C++ class ${classname}+;\n")
  endforeach(class)
  file (APPEND ${PDAL} "#endif\n")
endmacro(ALICE_GenerateLinkDef)