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# - Find Lustre compiler
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# Find the Lustre synchronous language compiler with associated includes path.
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# See https://cavale.enseeiht.fr/redmine/projects/lustrec
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# This module defines
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#  LUSTRE_COMPILER, the lustre compiler
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#  LUSTRE_COMPILER_VERSION, the version of the lustre compiler
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#  LUSTRE_INCLUDE_DIR, where to find dword.h, etc.
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#  LUSTRE_FOUND, If false, Lustre was not found.
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# On can set LUSTRE_PATH_HINT before using find_package(Lustre) and the
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# module with use the PATH as a hint to find lustrec.
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#
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# The hint can be given on the command line too:
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#   cmake -DLUSTRE_PATH_HINT=/DATA/ERIC/Lustre/lustre-x.y /path/to/source
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#
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# The module defines some functions:
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#   Lustre_Compile([NODE <Lustre Main Node>]
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#                  LUS_FILES <Lustre files>
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#                  [USER_C_FILES <C files>]
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#                  [VERBOSE <level>]
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#                  [LUSI]
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#                  LIBNAME <libraryName>)
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#
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# When used the Lustre_Compile macro define the variable
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# LUSTRE_GENERATED_C_FILES_<libraryName> in the parent scope
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# so that the caller can get (if needed) the list of Lustre generated files.
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# The VERBOSE level is a numeric value passed directly to the -verbose
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# command line option of the lustre compiler
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#
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include("/home/ploc/Local/share/helpful_functions.cmake")
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if(LUSTRE_PATH_HINT)
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  message(STATUS "FindLustre: using PATH HINT: ${LUSTRE_PATH_HINT}")
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else()
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  set(LUSTRE_PATH_HINT)
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endif()
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#One can add his/her own builtin PATH.
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#FILE(TO_CMAKE_PATH "/DATA/ERIC/Lustre/lustre-x.y" MYPATH)
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#list(APPEND LUSTRE_PATH_HINT ${MYPATH})
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# FIND_PROGRAM twice using NO_DEFAULT_PATH on first shot
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find_program(LUSTRE_COMPILER
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  NAMES lustrec
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  PATHS ${LUSTRE_PATH_HINT}
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  PATH_SUFFIXES bin
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  NO_DEFAULT_PATH
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  DOC "Path to the Lustre compiler command 'lustrec'")
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find_program(LUSTRE_COMPILER
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  NAMES lustrec
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  PATHS ${LUSTRE_PATH_HINT}
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  PATH_SUFFIXES bin
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  DOC "Path to the Lustre compiler command 'lustrec'")
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if(LUSTRE_COMPILER)
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    # get the path where the lustre compiler was found
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    get_filename_component(LUSTRE_PATH ${LUSTRE_COMPILER} PATH)
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    # remove bin
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    get_filename_component(LUSTRE_PATH ${LUSTRE_PATH} PATH)
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    # add path to LUSTRE_PATH_HINT
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    list(APPEND LUSTRE_PATH_HINT ${LUSTRE_PATH})
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    execute_process(COMMAND ${LUSTRE_COMPILER} -version
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        OUTPUT_VARIABLE LUSTRE_COMPILER_VERSION
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        OUTPUT_STRIP_TRAILING_WHITESPACE)
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    message(STATUS "Lustre compiler version is : ${LUSTRE_COMPILER_VERSION}")
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endif(LUSTRE_COMPILER)
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find_path(LUSTRE_INCLUDE_DIR
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          NAMES arrow.h
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          PATHS ${LUSTRE_PATH_HINT}
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          PATH_SUFFIXES include/lustrec
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          DOC "The Lustre include headers")
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# Macros used to compile a lustre library
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include(CMakeParseArguments)
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function(Lustre_Compile)
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  set(options LUSI)
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  set(oneValueArgs NODE LIBNAME VERBOSE)
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  set(multiValueArgs LUS_FILES USER_C_FILES)
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  cmake_parse_arguments(LUS "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN})
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  if(LUS_LUSI)
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    set(LUSTRE_LUSI_OPT "-lusi")
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  endif()
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  if (NOT LUS_LIBNAME)
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    message(FATAL_ERROR "You should specify LIBNAME for each Lustre_Compile call.")
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  endif()
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  if(LUS_NODE)
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    set(LUSTRE_NODE_OPT "-node;${LUS_NODE}")
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    set(LUSTRE_OUTPUT_DIR "${CMAKE_CURRENT_BINARY_DIR}/lus_${LUS_LIBNAME}/${LUS_NODE}")
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  else()
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    set(LUSTRE_NODE_OPT "")
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    set(LUSTRE_OUTPUT_DIR "${CMAKE_CURRENT_BINARY_DIR}/lus_${LUS_LIBNAME}")
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  endif()
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  if (LUS_VERBOSE)
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    set(LUSTRE_VERBOSE_OPT "-verbose;${LUS_VERBOSE}")
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  else()
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    # the default is to be quiet.
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    set(LUSTRE_VERBOSE_OPT "-verbose;0")
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  endif()
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  file(MAKE_DIRECTORY ${LUSTRE_OUTPUT_DIR})
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  set(GLOBAL_LUSTRE_GENERATED_C_FILES "")
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  set(GLOBAL_LUSTRE_DEP_C_FILES "")
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  # create list of generated C files in parent scope
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  set(LUSTRE_GENERATED_C_FILES_${LUS_LIBNAME} "" PARENT_SCOPE)
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  foreach(LFILE IN LISTS LUS_LUS_FILES)
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    get_lustre_name_ext(${LFILE} L E)
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    if ("${E}" STREQUAL "lus")
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      set(LUSTRE_GENERATED_FILES ${LUSTRE_OUTPUT_DIR}/${L}.h ${LUSTRE_OUTPUT_DIR}/${L}.c ${LUSTRE_OUTPUT_DIR}/${L}_alloc.h)
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      set(LUSTRE_DEP_FILES "")
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      if(LUS_NODE)
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         list(APPEND LUSTRE_GENERATED_FILES ${LUSTRE_OUTPUT_DIR}/${L}_main.c)
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         list(APPEND LUSTRE_DEP_FILES ${LUSTRE_INCLUDE_DIR}/io_frontend.c)
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      endif()
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    elseif("${E}" STREQUAL "lusi")
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      set(LUSTRE_GENERATED_FILES ${LUSTRE_OUTPUT_DIR}/${L}.h)
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    endif()
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    list(APPEND GLOBAL_LUSTRE_GENERATED_C_FILES ${LUSTRE_GENERATED_FILES})
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    list(APPEND GLOBAL_LUSTRE_DEP_FILES ${LUSTRE_DEP_FILES}) # todo: add if not already in the list
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    set(LUSTRE_GENERATED_FILES ${LUSTRE_GENERATED_FILES} ${LUSTRE_OUTPUT_DIR}/${L}.lusic)
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    if (LUS_LUSI)
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      add_custom_command(
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         OUTPUT ${CMAKE_CURRENT_SOURCE_DIR}/${LFILE}i
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         COMMAND ${LUSTRE_COMPILER} ${LUSTRE_LUSI_OPT} ${LFILE}
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         DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/${LFILE}
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         WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
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         COMMENT "Compile Lustre source(s): ${LFILE} with option -lusi."
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         )
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      message(STATUS "lustrec will produce lusi file: ${LFILE}i")
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    endif()
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    add_custom_command(
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      OUTPUT ${LUSTRE_GENERATED_FILES}
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      COMMAND ${LUSTRE_COMPILER} ${LUSTRE_VERBOSE_OPT} ${LUSTRE_NODE_OPT} -d ${LUSTRE_OUTPUT_DIR} ${LFILE}
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      DEPENDS ${LFILE}
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      WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
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      COMMENT "Compile Lustre source(s): ${LFILE} (generates: ${LUSTRE_GENERATED_FILES})."
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      )
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    set_source_files_properties(${LUSTRE_GENERATED_FILES} PROPERTIES GENERATED TRUE)
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  endforeach()
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  include_directories(${LUSTRE_INCLUDE_DIR} ${CMAKE_CURRENT_SOURCE_DIR} ${LUSTRE_OUTPUT_DIR})
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  if(LUS_NODE)
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  add_executable(${LUS_LIBNAME}
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              ${GLOBAL_LUSTRE_GENERATED_C_FILES} ${GLOBAL_LUSTRE_DEP_FILES} ${LUS_USER_C_FILES}
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              )
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  else()
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  add_library(${LUS_LIBNAME} SHARED
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              ${GLOBAL_LUSTRE_GENERATED_C_FILES} ${GLOBAL_LUSTRE_DEP_FILES} ${LUS_USER_C_FILES}
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              )
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  endif()
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  set_target_properties(${LUS_LIBNAME} PROPERTIES COMPILE_FLAGS "-std=c99")
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  set(LUSTRE_GENERATED_C_FILES_${LUS_LIBNAME} "${GLOBAL_LUSTRE_GENERATED_C_FILES}" PARENT_SCOPE)
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  message(STATUS "Lustre: Added rule for building lustre library: ${LUS_LIBNAME}")
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endfunction(Lustre_Compile)
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# handle the QUIETLY and REQUIRED arguments and set LUSTRE_FOUND to TRUE if
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# all listed variables are TRUE
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include(FindPackageHandleStandardArgs)
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FIND_PACKAGE_HANDLE_STANDARD_ARGS(LUSTRE
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                                  REQUIRED_VARS LUSTRE_COMPILER LUSTRE_INCLUDE_DIR)
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# VERSION FPHSA options not handled by CMake version < 2.8.2)
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#                                  VERSION_VAR LUSTRE_COMPILER_VERSION)
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mark_as_advanced(LUSTRE_INCLUDE_DIR)