159 lines
6.3 KiB
CMake
159 lines
6.3 KiB
CMake
# - Find gperf executable and provides a macro to generate custom build rules
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#
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# The module defines the following variables:
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# GPERF_FOUND - true is gperf executable is found
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# GPERF_EXECUTABLE - the path to the gperf executable
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# GPERF_VERSION - the version of gperf
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# GPERF_LIBRARIES - The gperf libraries
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#
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# The minimum required version of gperf can be specified using the
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# standard syntax, e.g. FIND_PACKAGE(GPERF 2.5.13)
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#
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#
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# If gperf is found on the system, the module provides the macro:
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# GPERF_TARGET(Name GperfInput GperfOutput [COMPILE_FLAGS <string>])
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# which creates a custom command to generate the <GperfOutput> file from
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# the <GperfInput> file. If COMPILE_FLAGS option is specified, the next
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# parameter is added to the gperf command line. Name is an alias used to
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# get details of this custom command. Indeed the macro defines the
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# following variables:
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# GPERF_${Name}_DEFINED - true is the macro ran successfully
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# GPERF_${Name}_OUTPUTS - the source file generated by the custom rule, an
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# alias for GperfOutput
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# GPERF_${Name}_INPUT - the gperf source file, an alias for ${GperfInput}
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#
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# Gperf scanners oftenly use tokens defined by Bison: the code generated
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# by Gperf depends of the header generated by Bison. This module also
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# defines a macro:
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# ADD_GPERF_BISON_DEPENDENCY(GperfTarget BisonTarget)
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# which adds the required dependency between a scanner and a parser
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# where <GperfTarget> and <BisonTarget> are the first parameters of
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# respectively GPERF_TARGET and BISON_TARGET macros.
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#
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# ====================================================================
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# Example:
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#
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# find_package(GPERF)
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#
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# GPERF_TARGET(MyHash hash.gperf ${CMAKE_CURRENT_BINARY_DIR}/hash.c)
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#
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# ====================================================================
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#=============================================================================
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# Copyright 2009 Kitware, Inc.
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# Copyright 2006 Tristan Carel
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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#
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# * Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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#
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# * Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# * Neither the names of Kitware, Inc., the Insight Software Consortium,
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# nor the names of their contributors may be used to endorse or promote
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# products derived from this software without specific prior written
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# permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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# HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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FIND_PROGRAM(GPERF_EXECUTABLE gperf DOC "path to the gperf executable")
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MARK_AS_ADVANCED(GPERF_EXECUTABLE)
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FIND_LIBRARY(FL_LIBRARY NAMES fl
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DOC "path to the fl library")
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MARK_AS_ADVANCED(FL_LIBRARY)
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SET(GPERF_LIBRARIES ${FL_LIBRARY})
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IF(GPERF_EXECUTABLE)
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EXECUTE_PROCESS(COMMAND ${GPERF_EXECUTABLE} --version
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OUTPUT_VARIABLE GPERF_version_output
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ERROR_VARIABLE GPERF_version_error
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RESULT_VARIABLE GPERF_version_result
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OUTPUT_STRIP_TRAILING_WHITESPACE)
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SET(ENV{LC_ALL} ${_Bison_SAVED_LC_ALL})
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IF(NOT ${GPERF_version_result} EQUAL 0)
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MESSAGE(SEND_ERROR "Command \"${GPERF_EXECUTABLE} --version\" failed with output:\n${GPERF_version_error}")
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ELSE()
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STRING(REGEX REPLACE "^GNU gperf ([^\n]+)\n.*" "\\1"
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GPERF_VERSION "${GPERF_version_output}")
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ENDIF()
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#============================================================
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# GPERF_TARGET (public macro)
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#============================================================
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#
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MACRO(GPERF_TARGET Name Input Output)
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SET(GPERF_TARGET_usage "GPERF_TARGET(<Name> <Input> <Output> [COMPILE_FLAGS <string>]")
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IF(${ARGC} GREATER 3)
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IF(${ARGC} EQUAL 5)
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IF("${ARGV3}" STREQUAL "COMPILE_FLAGS")
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SET(GPERF_EXECUTABLE_opts "${ARGV4}")
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SEPARATE_ARGUMENTS(GPERF_EXECUTABLE_opts)
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ELSE()
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MESSAGE(SEND_ERROR ${GPERF_TARGET_usage})
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ENDIF()
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ELSE()
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MESSAGE(SEND_ERROR ${GPERF_TARGET_usage})
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ENDIF()
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ENDIF()
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ADD_CUSTOM_COMMAND(OUTPUT ${Output}
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COMMAND ${GPERF_EXECUTABLE}
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ARGS ${GPERF_EXECUTABLE_opts} < ${Input} > ${Output}
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DEPENDS ${Input}
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COMMENT "[GPERF][${Name}] Building hash with gperf ${GPERF_VERSION}"
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WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})
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SET(GPERF_${Name}_DEFINED TRUE)
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SET(GPERF_${Name}_OUTPUTS ${Output})
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SET(GPERF_${Name}_INPUT ${Input})
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SET(GPERF_${Name}_COMPILE_FLAGS ${GPERF_EXECUTABLE_opts})
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ENDMACRO(GPERF_TARGET)
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#============================================================
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#============================================================
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# ADD_GPERF_BISON_DEPENDENCY (public macro)
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#============================================================
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#
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MACRO(ADD_GPERF_BISON_DEPENDENCY GperfTarget BisonTarget)
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IF(NOT GPERF_${GperfTarget}_OUTPUTS)
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MESSAGE(SEND_ERROR "Gperf target `${GperfTarget}' does not exists.")
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ENDIF()
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IF(NOT BISON_${BisonTarget}_OUTPUT_HEADER)
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MESSAGE(SEND_ERROR "Bison target `${BisonTarget}' does not exists.")
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ENDIF()
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SET_SOURCE_FILES_PROPERTIES(${GPERF_${GperfTarget}_OUTPUTS}
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PROPERTIES OBJECT_DEPENDS ${BISON_${BisonTarget}_OUTPUT_HEADER})
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ENDMACRO(ADD_GPERF_BISON_DEPENDENCY)
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#============================================================
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ENDIF(GPERF_EXECUTABLE)
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INCLUDE(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
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FIND_PACKAGE_HANDLE_STANDARD_ARGS(GPERF REQUIRED_VARS GPERF_EXECUTABLE
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VERSION_VAR GPERF_VERSION)
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# FindGPERF.cmake ends here
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