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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_FILE <Lustre file>
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#                  [USER_C_FILES <C files>]
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#                  [VERBOSE <level>]
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#		   [OPTIONS <options>]
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#				[DIR <directory dest>])
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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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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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# 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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  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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  NO_DEFAULT_PATH
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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 ${LUSTRE_PATH_HINT}
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          PATH_SUFFIXES include/lustrec
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          DOC "The Lustre include headers")
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# Macros used to compile a lustre library
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include(CMakeParseArguments)
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function(Lustre_Compile)
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  set(options "")
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  set(oneValueArgs  NODE VERBOSE LUS_FILE DIR DST_DIR)
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  set(multiValueArgs  OPTS USER_C_FILES )
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  cmake_parse_arguments(LUS "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN})
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  get_filename_component(L ${LUS_LUS_FILE} NAME_WE)
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  get_filename_component(E ${LUS_LUS_FILE} EXT)
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  set(LUSTREC_ARGS "")
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  if(LUS_DST_DIR)
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    set(OUTPUT_PATH "${LUS_DST_DIR}")
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  else()
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    set(OUTPUT_PATH "${CMAKE_CURRENT_BINARY_DIR}")
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  endif()
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  if(LUS_NODE)
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    set(LUSTRE_OUTPUT_DIR "${OUTPUT_PATH}/${L}/node_${LUS_NODE}")
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    set(LUSTREC_ARGS ${LUSTREC_ARGS} -node ${LUS_NODE} )
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  else()
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    set(LUSTRE_OUTPUT_DIR "${OUTPUT_PATH}/${L}")
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  endif()
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  if(LUS_OPTS)
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    CUT_OPTIONS("${LUS_OPTS}" LUS_OPTS_CUT)
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    if(LUS_NODE)
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	set(LUSTRE_OUTPUT_DIR "${LUSTRE_OUTPUT_DIR}_${LUS_OPTS_CUT}")
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    else(LUS_NODE)
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	set(LUSTRE_OUTPUT_DIR "${LUSTRE_OUTPUT_DIR}/${LUS_OPTS_CUT}")
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    endif(LUS_NODE)
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	set(LUSTREC_ARGS ${LUSTREC_ARGS} ${LUS_OPTS} )
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  endif(LUS_OPTS)
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  if (LUS_VERBOSE)
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    set(LUSTRE_VERBOSE_OPT "-verbose ${LUS_VERBOSE}")
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    set(LUSTREC_ARGS ${LUSTREC_ARGS} -verbose ${LUS_VERBOSE} )
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  endif()
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  set(LUSTRE_GENERATED_FILES "")
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  file(MAKE_DIRECTORY ${LUSTRE_OUTPUT_DIR})
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  # create list of generated C files in parent scope
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  if ("${E}" STREQUAL ".lus")
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	set(LUSTRE_GENERATED_FILES ${LUSTRE_OUTPUT_DIR}/${L}.h   ${LUSTRE_OUTPUT_DIR}/${L}.lusic )
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	if (LUS_NODE)
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		set(LUSTRE_GENERATED_FILES ${LUSTRE_GENERATED_FILES} ${LUSTRE_OUTPUT_DIR}/${L}.c ${LUSTRE_OUTPUT_DIR}/${L}_alloc.h ${LUSTRE_OUTPUT_DIR}/${L}_main.c ${LUSTRE_OUTPUT_DIR}/${L}.makefile)
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	endif(LUS_NODE)
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	if(LUS_OPTS MATCHES "horn")
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		set(LUSTRE_GENERATED_FILES ${LUSTRE_GENERATED_FILES} ${LUSTRE_OUTPUT_DIR}/${L}.smt2)
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	endif(LUS_OPTS MATCHES "horn")
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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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  if(LUS_DIR)
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	set(LUSTRE_OUTPUT_DIR ${LUS_DIR} )
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  endif()
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  set(LUSTREC_ARGS ${LUSTREC_ARGS} -d ${LUSTRE_OUTPUT_DIR} ${LUS_LUS_FILE})
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  set(LUSTREC_ARGS_${L}_${LUS_NODE}_${LUS_OPTS_CUT} "${LUSTREC_ARGS}" PARENT_SCOPE)
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  set(LUSTRE_GENERATED_FILES_${L}_${LUS_NODE}_${LUS_OPTS_CUT} "${LUSTRE_GENERATED_FILES}" PARENT_SCOPE)
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  set(LUSTRE_OUTPUT_DIR_${L}_${LUS_NODE}_${LUS_OPTS_CUT} "${LUSTRE_OUTPUT_DIR}" PARENT_SCOPE)
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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)
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