1 # - Find bison executable and provides macros to generate custom build rules
2 # The module defines the following variables:
4 # BISON_EXECUTABLE - path to the bison program
5 # BISON_VERSION - version of bison
6 # BISON_FOUND - true if the program was found
8 # If bison is found, the module defines the macros:
9 # BISON_TARGET(<Name> <YaccInput> <CodeOutput> [VERBOSE <file>]
10 # [COMPILE_FLAGS <string>])
11 # which will create a custom rule to generate a parser. <YaccInput> is
12 # the path to a yacc file. <CodeOutput> is the name of the source file
13 # generated by bison. A header file is also be generated, and contains
14 # the token list. If COMPILE_FLAGS option is specified, the next
15 # parameter is added in the bison command line. if VERBOSE option is
16 # specified, <file> is created and contains verbose descriptions of the
17 # grammar and parser. The macro defines a set of variables:
18 # BISON_${Name}_DEFINED - true is the macro ran successfully
19 # BISON_${Name}_INPUT - The input source file, an alias for <YaccInput>
20 # BISON_${Name}_OUTPUT_SOURCE - The source file generated by bison
21 # BISON_${Name}_OUTPUT_HEADER - The header file generated by bison
22 # BISON_${Name}_OUTPUTS - The sources files generated by bison
23 # BISON_${Name}_COMPILE_FLAGS - Options used in the bison command line
25 # ====================================================================
29 # BISON_TARGET(MyParser parser.y ${CMAKE_CURRENT_BINARY_DIR}/parser.cpp)
30 # add_executable(Foo main.cpp ${BISON_MyParser_OUTPUTS})
31 # ====================================================================
33 #=============================================================================
34 # Copyright 2009 Kitware, Inc.
35 # Copyright 2006 Tristan Carel
37 # Distributed under the OSI-approved BSD License (the "License");
38 # see accompanying file Copyright.txt for details.
40 # This software is distributed WITHOUT ANY WARRANTY; without even the
41 # implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
42 # See the License for more information.
43 #=============================================================================
44 # (To distributed this file outside of CMake, substitute the full
45 # License text for the above reference.)
47 FIND_PROGRAM(BISON_EXECUTABLE bison DOC "path to the bison executable")
48 MARK_AS_ADVANCED(BISON_EXECUTABLE)
52 EXECUTE_PROCESS(COMMAND ${BISON_EXECUTABLE} --version
53 OUTPUT_VARIABLE BISON_version_output
54 ERROR_VARIABLE BISON_version_error
55 RESULT_VARIABLE BISON_version_result
56 OUTPUT_STRIP_TRAILING_WHITESPACE)
57 IF(NOT ${BISON_version_result} EQUAL 0)
58 MESSAGE(SEND_ERROR "Command \"${BISON_EXECUTABLE} --version\" failed with output:\n${BISON_version_error}")
60 STRING(REGEX REPLACE "^bison \\(GNU Bison\\) ([^\n]+)\n.*" "\\1"
61 BISON_VERSION "${BISON_version_output}")
65 MACRO(BISON_TARGET_option_verbose Name BisonOutput filename)
66 LIST(APPEND BISON_TARGET_cmdopt "--verbose")
67 GET_FILENAME_COMPONENT(BISON_TARGET_output_path "${BisonOutput}" PATH)
68 GET_FILENAME_COMPONENT(BISON_TARGET_output_name "${BisonOutput}" NAME_WE)
69 ADD_CUSTOM_COMMAND(OUTPUT ${filename}
70 COMMAND ${CMAKE_COMMAND}
72 "${BISON_TARGET_output_path}/${BISON_TARGET_output_name}.output"
75 "${BISON_TARGET_output_path}/${BISON_TARGET_output_name}.output"
76 COMMENT "[BISON][${Name}] Copying bison verbose table to ${filename}"
77 WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}/Source)
78 SET(BISON_${Name}_VERBOSE_FILE ${filename})
79 LIST(APPEND BISON_TARGET_extraoutputs
80 "${BISON_TARGET_output_path}/${BISON_TARGET_output_name}.output")
81 ENDMACRO(BISON_TARGET_option_verbose)
84 MACRO(BISON_TARGET_option_extraopts Options)
85 SET(BISON_TARGET_extraopts "${Options}")
86 SEPARATE_ARGUMENTS(BISON_TARGET_extraopts)
87 LIST(APPEND BISON_TARGET_cmdopt ${BISON_TARGET_extraopts})
88 ENDMACRO(BISON_TARGET_option_extraopts)
90 #============================================================
91 # BISON_TARGET (public macro)
92 #============================================================
94 MACRO(BISON_TARGET Name BisonInput BisonOutput)
95 SET(BISON_TARGET_output_header "")
96 SET(BISON_TARGET_command_opt "")
97 SET(BISON_TARGET_outputs "${BisonOutput}")
98 IF(NOT ${ARGC} EQUAL 3 AND NOT ${ARGC} EQUAL 5 AND NOT ${ARGC} EQUAL 7)
99 MESSAGE(SEND_ERROR "Usage")
102 IF(${ARGC} GREATER 5 OR ${ARGC} EQUAL 5)
103 IF("${ARGV3}" STREQUAL "VERBOSE")
104 BISON_TARGET_option_verbose(${Name} ${BisonOutput} "${ARGV4}")
106 IF("${ARGV3}" STREQUAL "COMPILE_FLAGS")
107 BISON_TARGET_option_extraopts("${ARGV4}")
112 IF("${ARGV5}" STREQUAL "VERBOSE")
113 BISON_TARGET_option_verbose(${Name} ${BisonOutput} "${ARGV6}")
116 IF("${ARGV5}" STREQUAL "COMPILE_FLAGS")
117 BISON_TARGET_option_extraopts("${ARGV6}")
121 # Header's name generated by bison (see option -d)
122 LIST(APPEND BISON_TARGET_cmdopt "-d")
123 STRING(REGEX REPLACE "^(.*)(\\.[^.]*)$" "\\2" _fileext "${ARGV2}")
124 STRING(REPLACE "c" "h" _fileext ${_fileext})
125 STRING(REGEX REPLACE "^(.*)(\\.[^.]*)$" "\\1${_fileext}"
126 BISON_${Name}_OUTPUT_HEADER "${ARGV2}")
127 LIST(APPEND BISON_TARGET_outputs "${BISON_${Name}_OUTPUT_HEADER}")
129 ADD_CUSTOM_COMMAND(OUTPUT ${BISON_TARGET_outputs}
130 ${BISON_TARGET_extraoutputs}
131 COMMAND ${BISON_EXECUTABLE}
132 ARGS ${BISON_TARGET_cmdopt} -o ${ARGV2} ${ARGV1}
134 COMMENT "[BISON][${Name}] Building parser with bison ${BISON_VERSION}"
135 WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})
137 # define target variables
138 SET(BISON_${Name}_DEFINED TRUE)
139 SET(BISON_${Name}_INPUT ${ARGV1})
140 SET(BISON_${Name}_OUTPUTS ${BISON_TARGET_outputs})
141 SET(BISON_${Name}_COMPILE_FLAGS ${BISON_TARGET_cmdopt})
142 SET(BISON_${Name}_OUTPUT_SOURCE "${BisonOutput}")
144 ENDIF(NOT ${ARGC} EQUAL 3 AND NOT ${ARGC} EQUAL 5 AND NOT ${ARGC} EQUAL 7)
145 ENDMACRO(BISON_TARGET)
147 #============================================================
149 ENDIF(BISON_EXECUTABLE)
151 INCLUDE(FindPackageHandleStandardArgs)
152 FIND_PACKAGE_HANDLE_STANDARD_ARGS(BISON DEFAULT_MSG BISON_EXECUTABLE)
154 # FindBISON.cmake ends here