You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
142 lines
5.3 KiB
142 lines
5.3 KiB
15 years ago
|
# - Find flex executable and provides a macro to generate custom build rules
|
||
|
|
#
|
||
|
|
# The module defines the following variables:
|
||
|
|
# FLEX_FOUND - true is flex executable is found
|
||
|
|
# FLEX_EXECUTABLE - the path to the flex executable
|
||
|
|
# FLEX_VERSION - the version of flex
|
||
|
|
# FLEX_LIBRARIES - The flex libraries
|
||
|
|
#
|
||
|
|
# If flex is found on the system, the module provides the macro:
|
||
|
|
# FLEX_TARGET(Name FlexInput FlexOutput [COMPILE_FLAGS <string>])
|
||
|
|
# which creates a custom command to generate the <FlexOutput> file from
|
||
|
|
# the <FlexInput> file. If COMPILE_FLAGS option is specified, the next
|
||
|
|
# parameter is added to the flex command line. Name is an alias used to
|
||
|
|
# get details of this custom command. Indeed the macro defines the
|
||
|
|
# following variables:
|
||
|
|
# FLEX_${Name}_DEFINED - true is the macro ran successfully
|
||
|
|
# FLEX_${Name}_OUTPUTS - the source file generated by the custom rule, an
|
||
|
|
# alias for FlexOutput
|
||
|
|
# FLEX_${Name}_INPUT - the flex source file, an alias for ${FlexInput}
|
||
|
|
#
|
||
|
|
# Flex scanners oftenly use tokens defined by Bison: the code generated
|
||
|
|
# by Flex depends of the header generated by Bison. This module also
|
||
|
|
# defines a macro:
|
||
|
|
# ADD_FLEX_BISON_DEPENDENCY(FlexTarget BisonTarget)
|
||
|
|
# which adds the required dependency between a scanner and a parser
|
||
|
|
# where <FlexTarget> and <BisonTarget> are the first parameters of
|
||
|
|
# respectively FLEX_TARGET and BISON_TARGET macros.
|
||
|
|
#
|
||
|
|
#====================================================================
|
||
|
|
# Example:
|
||
|
|
#
|
||
|
|
# find_package(BISON)
|
||
|
|
# find_package(FLEX)
|
||
|
|
#
|
||
|
|
# BISON_TARGET(MyParser parser.y ${CMAKE_CURRENT_BINARY_DIR}/parser.cpp
|
||
|
|
# FLEX_TARGET(MyScanner lexer.l ${CMAKE_CURRENT_BIANRY_DIR}/lexer.cpp)
|
||
|
|
# ADD_FLEX_BISON_DEPENDENCY(MyScanner MyParser)
|
||
|
|
#
|
||
|
|
# include_directories(${CMAKE_CURRENT_BINARY_DIR})
|
||
|
|
# add_executable(Foo
|
||
|
|
# Foo.cc
|
||
|
|
# ${BISON_MyParser_OUTPUTS}
|
||
|
|
# ${FLEX_MyScanner_OUTPUTS}
|
||
|
|
# )
|
||
|
|
#====================================================================
|
||
|
|
|
||
|
|
#=============================================================================
|
||
|
|
# 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.
|
||
|
|
#=============================================================================
|
||
|
|
# (To distributed this file outside of CMake, substitute the full
|
||
|
|
# License text for the above reference.)
|
||
|
|
|
||
|
|
FIND_PROGRAM(FLEX_EXECUTABLE flex DOC "path to the flex executable")
|
||
|
|
MARK_AS_ADVANCED(FLEX_EXECUTABLE)
|
||
|
|
|
||
|
|
FIND_LIBRARY(FL_LIBRARY NAMES fl
|
||
|
|
DOC "path to the fl library")
|
||
|
|
MARK_AS_ADVANCED(FL_LIBRARY)
|
||
|
|
SET(FLEX_LIBRARIES ${FL_LIBRARY})
|
||
|
|
|
||
|
|
IF(FLEX_EXECUTABLE)
|
||
|
|
|
||
|
|
EXECUTE_PROCESS(COMMAND ${FLEX_EXECUTABLE} --version
|
||
|
|
OUTPUT_VARIABLE FLEX_version_output
|
||
|
|
ERROR_VARIABLE FLEX_version_error
|
||
|
|
RESULT_VARIABLE FLEX_version_result
|
||
|
|
OUTPUT_STRIP_TRAILING_WHITESPACE)
|
||
|
|
IF(NOT ${FLEX_version_result} EQUAL 0)
|
||
|
|
MESSAGE(SEND_ERROR "Command \"${FLEX_EXECUTABLE} --version\" failed with output:\n${FLEX_version_error}")
|
||
|
|
ELSE()
|
||
|
|
STRING(REGEX REPLACE "^flex (.*)$" "\\1"
|
||
|
|
FLEX_VERSION "${FLEX_version_output}")
|
||
|
|
ENDIF()
|
||
|
|
|
||
|
|
#============================================================
|
||
|
|
# FLEX_TARGET (public macro)
|
||
|
|
#============================================================
|
||
|
|
#
|
||
|
|
MACRO(FLEX_TARGET Name Input Output)
|
||
|
|
SET(FLEX_TARGET_usage "FLEX_TARGET(<Name> <Input> <Output> [COMPILE_FLAGS <string>]")
|
||
|
|
IF(${ARGC} GREATER 3)
|
||
|
|
IF(${ARGC} EQUAL 5)
|
||
|
|
IF("${ARGV3}" STREQUAL "COMPILE_FLAGS")
|
||
|
|
SET(FLEX_EXECUTABLE_opts "${ARGV4}")
|
||
|
|
SEPARATE_ARGUMENTS(FLEX_EXECUTABLE_opts)
|
||
|
|
ELSE()
|
||
|
|
MESSAGE(SEND_ERROR ${FLEX_TARGET_usage})
|
||
|
|
ENDIF()
|
||
|
|
ELSE()
|
||
|
|
MESSAGE(SEND_ERROR ${FLEX_TARGET_usage})
|
||
|
|
ENDIF()
|
||
|
|
ENDIF()
|
||
|
|
|
||
|
|
ADD_CUSTOM_COMMAND(OUTPUT ${Output}
|
||
|
|
COMMAND ${FLEX_EXECUTABLE}
|
||
|
|
ARGS ${FLEX_EXECUTABLE_opts} -o${Output} ${Input}
|
||
|
|
DEPENDS ${Input}
|
||
|
|
COMMENT "[FLEX][${Name}] Building scanner with flex ${FLEX_VERSION}"
|
||
|
|
WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})
|
||
|
|
|
||
|
|
SET(FLEX_${Name}_DEFINED TRUE)
|
||
|
|
SET(FLEX_${Name}_OUTPUTS ${Output})
|
||
|
|
SET(FLEX_${Name}_INPUT ${Input})
|
||
|
|
SET(FLEX_${Name}_COMPILE_FLAGS ${FLEX_EXECUTABLE_opts})
|
||
|
|
ENDMACRO(FLEX_TARGET)
|
||
|
|
#============================================================
|
||
|
|
|
||
|
|
|
||
|
|
#============================================================
|
||
|
|
# ADD_FLEX_BISON_DEPENDENCY (public macro)
|
||
|
|
#============================================================
|
||
|
|
#
|
||
|
|
MACRO(ADD_FLEX_BISON_DEPENDENCY FlexTarget BisonTarget)
|
||
|
|
|
||
|
|
IF(NOT FLEX_${FlexTarget}_OUTPUTS)
|
||
|
|
MESSAGE(SEND_ERROR "Flex target `${FlexTarget}' does not exists.")
|
||
|
|
ENDIF()
|
||
|
|
|
||
|
|
IF(NOT BISON_${BisonTarget}_OUTPUT_HEADER)
|
||
|
|
MESSAGE(SEND_ERROR "Bison target `${BisonTarget}' does not exists.")
|
||
|
|
ENDIF()
|
||
|
|
|
||
|
|
SET_SOURCE_FILES_PROPERTIES(${FLEX_${FlexTarget}_OUTPUTS}
|
||
|
|
PROPERTIES OBJECT_DEPENDS ${BISON_${BisonTarget}_OUTPUT_HEADER})
|
||
|
|
ENDMACRO(ADD_FLEX_BISON_DEPENDENCY)
|
||
|
|
#============================================================
|
||
|
|
|
||
|
|
ENDIF(FLEX_EXECUTABLE)
|
||
|
|
|
||
|
|
INCLUDE(FindPackageHandleStandardArgs)
|
||
|
|
FIND_PACKAGE_HANDLE_STANDARD_ARGS(FLEX DEFAULT_MSG FLEX_EXECUTABLE)
|
||
|
|
|
||
|
|
# FindFLEX.cmake ends here
|