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# - Find yacc executable and provides macros to generate custom build rules
# The module defines the following variables:
#
# YACC_EXECUTABLE - path to the yacc program
# YACC_FOUND - true if the program was found
#
# The minimum required version of yacc can be specified using the
# standard CMake syntax, e.g. find_package(YACC 2.1.3)
#
# If yacc is found, the module defines the macros:
# YACC_TARGET(<Name> <YaccInput> <CodeOutput> [VERBOSE <file>]
# [COMPILE_FLAGS <string>])
# which will create a custom rule to generate a parser. <YaccInput> is
# the path to a yacc file. <CodeOutput> is the name of the source file
# generated by yacc. A header file is also be generated, and contains
# the token list. If COMPILE_FLAGS option is specified, the next
# parameter is added in the yacc command line. if VERBOSE option is
# specified, <file> is created and contains verbose descriptions of the
# grammar and parser. The macro defines a set of variables:
# YACC_${Name}_DEFINED - true is the macro ran successfully
# YACC_${Name}_INPUT - The input source file, an alias for <YaccInput>
# YACC_${Name}_OUTPUT_SOURCE - The source file generated by yacc
# YACC_${Name}_OUTPUT_HEADER - The header file generated by yacc
# YACC_${Name}_OUTPUTS - The sources files generated by yacc
# YACC_${Name}_COMPILE_FLAGS - Options used in the yacc command line
#
# ====================================================================
#=============================================================================
# Copyright 2009 Kitware, Inc.
# Copyright 2006 Tristan Carel
#
# Distributed under the OSI-approved BSD License (the "License");
# see accompanying file Copyright.txt for details.
#
# This software is distributed WITHOUT ANY WARRANTY; without even the
# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
# See the License for more information.
#=============================================================================
# This file is based on the FindFLEX CMake macro, and adapted by ECMWF
#=============================================================================
# (C) Copyright 2011- ECMWF.
#
# This software is licensed under the terms of the Apache Licence Version 2.0
# which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
# In applying this licence, ECMWF does not waive the privileges and immunities
# granted to it by virtue of its status as an intergovernmental organisation nor
# does it submit to any jurisdiction.
FIND_PROGRAM(YACC_EXECUTABLE yacc DOC "path to the yacc/yacc executable")
MARK_AS_ADVANCED(YACC_EXECUTABLE)
IF(YACC_EXECUTABLE)
# the yacc commands should be executed with the C locale, otherwise
# the message (which are parsed) may be translated
SET(_Yacc_SAVED_LC_ALL "$ENV{LC_ALL}")
SET(ENV{LC_ALL} C)
SET(ENV{LC_ALL} ${_Yacc_SAVED_LC_ALL})
# internal macro
MACRO(YACC_TARGET_option_verbose Name YaccOutput filename)
LIST(APPEND YACC_TARGET_cmdopt "--verbose")
GET_FILENAME_COMPONENT(YACC_TARGET_output_path "${YaccOutput}" PATH)
GET_FILENAME_COMPONENT(YACC_TARGET_output_name "${YaccOutput}" NAME_WE)
ADD_CUSTOM_COMMAND(OUTPUT ${filename}
COMMAND ${CMAKE_COMMAND}
ARGS -E copy
"${YACC_TARGET_output_path}/${YACC_TARGET_output_name}.output"
"${filename}"
DEPENDS
"${YACC_TARGET_output_path}/${YACC_TARGET_output_name}.output"
COMMENT "[YACC][${Name}] Copying yacc verbose table to ${filename}"
WORKING_DIRECTORY ${CMAKE_SOURCE_DIR})
SET(YACC_${Name}_VERBOSE_FILE ${filename})
LIST(APPEND YACC_TARGET_extraoutputs
"${YACC_TARGET_output_path}/${YACC_TARGET_output_name}.output")
ENDMACRO(YACC_TARGET_option_verbose)
# internal macro
MACRO(YACC_TARGET_option_extraopts Options)
SET(YACC_TARGET_extraopts "${Options}")
SEPARATE_ARGUMENTS(YACC_TARGET_extraopts)
LIST(APPEND YACC_TARGET_cmdopt ${YACC_TARGET_extraopts})
ENDMACRO(YACC_TARGET_option_extraopts)
#============================================================
# YACC_TARGET (public macro)
#============================================================
#
MACRO(YACC_TARGET Name YaccInput YaccOutput)
SET(YACC_TARGET_output_header "")
SET(YACC_TARGET_cmdopt "")
SET(YACC_TARGET_outputs "${YaccOutput}")
IF(NOT ${ARGC} EQUAL 3 AND NOT ${ARGC} EQUAL 5 AND NOT ${ARGC} EQUAL 7)
MESSAGE(SEND_ERROR "Usage")
ELSE()
# Parsing parameters
IF(${ARGC} GREATER 5 OR ${ARGC} EQUAL 5)
IF("${ARGV3}" STREQUAL "VERBOSE")
YACC_TARGET_option_verbose(${Name} ${YaccOutput} "${ARGV4}")
ENDIF()
IF("${ARGV3}" STREQUAL "COMPILE_FLAGS")
YACC_TARGET_option_extraopts("${ARGV4}")
ENDIF()
ENDIF()
IF(${ARGC} EQUAL 7)
IF("${ARGV5}" STREQUAL "VERBOSE")
YACC_TARGET_option_verbose(${Name} ${YaccOutput} "${ARGV6}")
ENDIF()
IF("${ARGV5}" STREQUAL "COMPILE_FLAGS")
YACC_TARGET_option_extraopts("${ARGV6}")
ENDIF()
ENDIF()
# Header's name generated by yacc (see option -d)
LIST(APPEND YACC_TARGET_cmdopt "-d")
STRING(REGEX REPLACE "^(.*)(\\.[^.]*)$" "\\2" _fileext "${ARGV2}")
STRING(REPLACE "c" "h" _fileext ${_fileext})
STRING(REGEX REPLACE "^(.*)(\\.[^.]*)$" "\\1${_fileext}"
YACC_${Name}_OUTPUT_HEADER "${ARGV2}")
LIST(APPEND YACC_TARGET_outputs "${YACC_${Name}_OUTPUT_HEADER}")
# message ( STATUS "${YACC_EXECUTABLE} ${YACC_TARGET_cmdopt} ${CMAKE_CURRENT_BINARY_DIR}/${ARGV1}" )
# message ( STATUS "${CMAKE_COMMAND} -E rename ${CMAKE_CURRENT_BINARY_DIR}/y.tab.h ${YACC_${Name}_OUTPUT_HEADER}" )
# message ( STATUS "${CMAKE_COMMAND} -E rename ${CMAKE_CURRENT_BINARY_DIR}/y.tab.c ${ARGV2}" )
ADD_CUSTOM_COMMAND(OUTPUT ${YACC_TARGET_outputs} ${YACC_TARGET_extraoutputs}
COMMAND ${CMAKE_COMMAND} -E copy_if_different ${CMAKE_CURRENT_SOURCE_DIR}/${ARGV1} ${CMAKE_CURRENT_BINARY_DIR}
COMMAND ${YACC_EXECUTABLE} ${YACC_TARGET_cmdopt} ${CMAKE_CURRENT_BINARY_DIR}/${ARGV1}
COMMAND ${CMAKE_COMMAND} -E rename ${CMAKE_CURRENT_BINARY_DIR}/y.tab.h ${YACC_${Name}_OUTPUT_HEADER}
COMMAND ${CMAKE_COMMAND} -E rename ${CMAKE_CURRENT_BINARY_DIR}/y.tab.c ${ARGV2}
DEPENDS ${ARGV1}
COMMENT "[YACC][${Name}] Building parser with yacc"
WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
# define target variables
SET(YACC_${Name}_DEFINED TRUE)
SET(YACC_${Name}_INPUT ${ARGV1})
SET(YACC_${Name}_OUTPUTS ${YACC_TARGET_outputs})
SET(YACC_${Name}_COMPILE_FLAGS ${YACC_TARGET_cmdopt})
SET(YACC_${Name}_OUTPUT_SOURCE "${YaccOutput}")
ENDIF(NOT ${ARGC} EQUAL 3 AND NOT ${ARGC} EQUAL 5 AND NOT ${ARGC} EQUAL 7)
ENDMACRO(YACC_TARGET)
#
#============================================================
ENDIF(YACC_EXECUTABLE)
FIND_PACKAGE_HANDLE_STANDARD_ARGS(YACC REQUIRED_VARS YACC_EXECUTABLE )
# FindYACC.cmake ends here
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