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# - Find bison executable and provides macros to generate custom build rules
# The module defines the following variables:
#
# BISON_EXECUTABLE - path to the bison program
# BISON_VERSION - version of bison
# BISON_FOUND - true if the program was found
#
# If bison is found, the module defines the macros:
# BISON_TARGET(<Name> <YaccInput> <CodeOutput> [VERBOSE <file>]
# [COMPILE_FLAGS <string>] [HEADER <FILE>])
# 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 bison. A header file containing the token list is also
# generated according to bison's -d option by default or if the HEADER
# option is used, the argument is passed to bison's --defines option to
# specify output file. If COMPILE_FLAGS option is specified, the next
# parameter is added in the bison 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:
# BISON_${Name}_DEFINED - true is the macro ran successfully
# BISON_${Name}_INPUT - The input source file, an alias for <YaccInput>
# BISON_${Name}_OUTPUT_SOURCE - The source file generated by bison
# BISON_${Name}_OUTPUT_HEADER - The header file generated by bison
# BISON_${Name}_OUTPUTS - The sources files generated by bison
# BISON_${Name}_COMPILE_FLAGS - Options used in the bison command line
#
# ====================================================================
# Example:
#
# find_package(BISON)
# BISON_TARGET(MyParser parser.y ${CMAKE_CURRENT_BINARY_DIR}/parser.cpp)
# add_executable(Foo main.cpp ${BISON_MyParser_OUTPUTS})
# ====================================================================
#=============================================================================
# Copyright 2009 Kitware, Inc.
# Copyright 2006 Tristan Carel
# Modified 2010 by Jon Siwek, adding HEADER option
#
# Distributed under the OSI-approved BSD License (the "License"):
# CMake - Cross Platform Makefile Generator
# Copyright 2000-2009 Kitware, Inc., Insight Software Consortium
# All rights reserved.
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
#
# * Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# * Neither the names of Kitware, Inc., the Insight Software Consortium,
# nor the names of their contributors may be used to endorse or promote
# products derived from this software without specific prior written
# permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# 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.
#=============================================================================
FIND_PROGRAM(BISON_EXECUTABLE bison DOC "path to the bison executable")
MARK_AS_ADVANCED(BISON_EXECUTABLE)
IF(BISON_EXECUTABLE)
EXECUTE_PROCESS(COMMAND ${BISON_EXECUTABLE} --version
OUTPUT_VARIABLE BISON_version_output
ERROR_VARIABLE BISON_version_error
RESULT_VARIABLE BISON_version_result
OUTPUT_STRIP_TRAILING_WHITESPACE)
IF(NOT ${BISON_version_result} EQUAL 0)
MESSAGE(SEND_ERROR "Command \"${BISON_EXECUTABLE} --version\" failed with output:\n${BISON_version_error}")
ELSE()
STRING(REGEX REPLACE "^bison \\(GNU Bison\\) ([^\n]+)\n.*" "\\1"
BISON_VERSION "${BISON_version_output}")
ENDIF()
# internal macro
MACRO(BISON_TARGET_option_verbose Name BisonOutput filename)
LIST(APPEND BISON_TARGET_cmdopt "--verbose")
GET_FILENAME_COMPONENT(BISON_TARGET_output_path "${BisonOutput}" PATH)
GET_FILENAME_COMPONENT(BISON_TARGET_output_name "${BisonOutput}" NAME_WE)
ADD_CUSTOM_COMMAND(OUTPUT ${filename}
COMMAND ${CMAKE_COMMAND}
ARGS -E copy
"${BISON_TARGET_output_path}/${BISON_TARGET_output_name}.output"
"${filename}"
DEPENDS
"${BISON_TARGET_output_path}/${BISON_TARGET_output_name}.output"
COMMENT "[BISON][${Name}] Copying bison verbose table to ${filename}"
WORKING_DIRECTORY ${CMAKE_SOURCE_DIR})
SET(BISON_${Name}_VERBOSE_FILE ${filename})
LIST(APPEND BISON_TARGET_extraoutputs
"${BISON_TARGET_output_path}/${BISON_TARGET_output_name}.output")
ENDMACRO(BISON_TARGET_option_verbose)
# internal macro
MACRO(BISON_TARGET_option_extraopts Options)
SET(BISON_TARGET_extraopts "${Options}")
SEPARATE_ARGUMENTS(BISON_TARGET_extraopts)
LIST(APPEND BISON_TARGET_cmdopt ${BISON_TARGET_extraopts})
ENDMACRO(BISON_TARGET_option_extraopts)
#============================================================
# BISON_TARGET (public macro)
#============================================================
#
MACRO(BISON_TARGET Name BisonInput BisonOutput)
SET(BISON_TARGET_output_header "")
#SET(BISON_TARGET_command_opt "")
SET(BISON_TARGET_cmdopt "")
SET(BISON_TARGET_outputs "${BisonOutput}")
IF(NOT ${ARGC} EQUAL 3 AND
NOT ${ARGC} EQUAL 5 AND
NOT ${ARGC} EQUAL 7 AND
NOT ${ARGC} EQUAL 9)
MESSAGE(SEND_ERROR "Usage")
ELSE()
# Parsing parameters
IF(${ARGC} GREATER 5 OR ${ARGC} EQUAL 5)
IF("${ARGV3}" STREQUAL "VERBOSE")
BISON_TARGET_option_verbose(${Name} ${BisonOutput} "${ARGV4}")
ENDIF()
IF("${ARGV3}" STREQUAL "COMPILE_FLAGS")
BISON_TARGET_option_extraopts("${ARGV4}")
ENDIF()
IF("${ARGV3}" STREQUAL "HEADER")
set(BISON_TARGET_output_header "${ARGV4}")
ENDIF()
ENDIF()
IF(${ARGC} GREATER 7 OR ${ARGC} EQUAL 7)
IF("${ARGV5}" STREQUAL "VERBOSE")
BISON_TARGET_option_verbose(${Name} ${BisonOutput} "${ARGV6}")
ENDIF()
IF("${ARGV5}" STREQUAL "COMPILE_FLAGS")
BISON_TARGET_option_extraopts("${ARGV6}")
ENDIF()
IF("${ARGV5}" STREQUAL "HEADER")
set(BISON_TARGET_output_header "${ARGV6}")
ENDIF()
ENDIF()
IF(${ARGC} EQUAL 9)
IF("${ARGV7}" STREQUAL "VERBOSE")
BISON_TARGET_option_verbose(${Name} ${BisonOutput} "${ARGV8}")
ENDIF()
IF("${ARGV7}" STREQUAL "COMPILE_FLAGS")
BISON_TARGET_option_extraopts("${ARGV8}")
ENDIF()
IF("${ARGV7}" STREQUAL "HEADER")
set(BISON_TARGET_output_header "${ARGV8}")
ENDIF()
ENDIF()
IF(BISON_TARGET_output_header)
# Header's name passed in as argument to be used in --defines option
LIST(APPEND BISON_TARGET_cmdopt
"--defines=${BISON_TARGET_output_header}")
set(BISON_${Name}_OUTPUT_HEADER ${BISON_TARGET_output_header})
ELSE()
# Header's name generated by bison (see option -d)
LIST(APPEND BISON_TARGET_cmdopt "-d")
STRING(REGEX REPLACE "^(.*)(\\.[^.]*)$" "\\2" _fileext "${ARGV2}")
STRING(REPLACE "c" "h" _fileext ${_fileext})
STRING(REGEX REPLACE "^(.*)(\\.[^.]*)$" "\\1${_fileext}"
BISON_${Name}_OUTPUT_HEADER "${ARGV2}")
ENDIF()
LIST(APPEND BISON_TARGET_outputs "${BISON_${Name}_OUTPUT_HEADER}")
ADD_CUSTOM_COMMAND(OUTPUT ${BISON_TARGET_outputs}
${BISON_TARGET_extraoutputs}
COMMAND ${BISON_EXECUTABLE}
ARGS ${BISON_TARGET_cmdopt} -o ${ARGV2} ${ARGV1}
DEPENDS ${ARGV1}
COMMENT "[BISON][${Name}] Building parser with bison ${BISON_VERSION}"
WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})
# define target variables
SET(BISON_${Name}_DEFINED TRUE)
SET(BISON_${Name}_INPUT ${ARGV1})
SET(BISON_${Name}_OUTPUTS ${BISON_TARGET_outputs})
SET(BISON_${Name}_COMPILE_FLAGS ${BISON_TARGET_cmdopt})
SET(BISON_${Name}_OUTPUT_SOURCE "${BisonOutput}")
ENDIF(NOT ${ARGC} EQUAL 3 AND
NOT ${ARGC} EQUAL 5 AND
NOT ${ARGC} EQUAL 7 AND
NOT ${ARGC} EQUAL 9)
ENDMACRO(BISON_TARGET)
#
#============================================================
ENDIF(BISON_EXECUTABLE)
INCLUDE(FindPackageHandleStandardArgs)
FIND_PACKAGE_HANDLE_STANDARD_ARGS(BISON DEFAULT_MSG BISON_EXECUTABLE)
# FindBISON.cmake ends here
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