blob: e397d284f6de5e694ec3168d00f769f4fdd958ba (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
|
# - 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
# FLEX_INCLUDE_DIRS - The path to the flex headers
#
# The minimum required version of flex can be specified using the
# standard syntax, e.g. find_package(FLEX 2.5.13)
#
#
# 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 ${CMAKE_CURRENT_BINARY_DIR}/lexer.cpp)
# ADD_FLEX_BISON_DEPENDENCY(MyScanner MyParser)
#
# include_directories(${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 distribute 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")
find_path(FLEX_INCLUDE_DIR FlexLexer.h
DOC "Path to the flex headers")
mark_as_advanced(FL_LIBRARY FLEX_INCLUDE_DIR)
set(FLEX_INCLUDE_DIRS ${FLEX_INCLUDE_DIR})
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 ${FLEX_version_result} EQUAL 0)
if(FLEX_FIND_REQUIRED)
message(SEND_ERROR "Command \"${FLEX_EXECUTABLE} --version\" failed with output:\n${FLEX_version_output}\n${FLEX_version_error}")
else()
message("Command \"${FLEX_EXECUTABLE} --version\" failed with output:\n${FLEX_version_output}\n${FLEX_version_error}\nFLEX_VERSION will not be available")
endif()
else()
# older versions of flex printed "/full/path/to/executable version X.Y"
# newer versions use "basename(executable) X.Y"
get_filename_component(FLEX_EXE_NAME "${FLEX_EXECUTABLE}" NAME)
string(REGEX REPLACE "^.*${FLEX_EXE_NAME}\"? (version )?([0-9]+[^ ]*)$" "\\2"
FLEX_VERSION "${FLEX_version_output}")
unset(FLEX_EXE_NAME)
endif()
#============================================================
# FLEX_TARGET (public macro)
#============================================================
#
macro(FLEX_TARGET Name Input Output)
set(FLEX_TARGET_usage "FLEX_TARGET(<Name> <Input> <Output> [COMPILE_FLAGS <string>]")
if(${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 ${FLEX_EXECUTABLE_opts})
endmacro()
#============================================================
#============================================================
# ADD_FLEX_BISON_DEPENDENCY (public macro)
#============================================================
#
macro(ADD_FLEX_BISON_DEPENDENCY FlexTarget BisonTarget)
if(NOT FLEX_${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()
#============================================================
endif()
include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
FIND_PACKAGE_HANDLE_STANDARD_ARGS(FLEX REQUIRED_VARS FLEX_EXECUTABLE
VERSION_VAR FLEX_VERSION)
# FindFLEX.cmake ends here
|
