forked from osmocom/wireshark
61 lines
1.8 KiB
CMake
61 lines
1.8 KiB
CMake
#
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# - Find bison/yacc executable
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#
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INCLUDE(FindChocolatey)
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FIND_PROGRAM(YACC_EXECUTABLE
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NAMES
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win_bison
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bison
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yacc
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PATHS
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${CHOCOLATEY_BIN_PATH}
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/bin
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/usr/bin
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/usr/local/bin
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/sbin
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)
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INCLUDE(FindPackageHandleStandardArgs)
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FIND_PACKAGE_HANDLE_STANDARD_ARGS(YACC DEFAULT_MSG YACC_EXECUTABLE)
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MARK_AS_ADVANCED(YACC_EXECUTABLE)
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# Specifying "%pure-parser" will fail with a deprecation warning in
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# Bison 3.4 and later. Specifying "%define api.pure" doesn't work with
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# Berkeley YACC and older versions of Bison (such as 2.3, which ships
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# with macOS). If we're using Bison and it's new, configure our .y.in
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# files with "%define api.pure", otherwise use "%pure-parser".
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set(YACC_PURE_PARSER_DIRECTIVE "%pure-parser")
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if(YACC_EXECUTABLE)
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execute_process(COMMAND ${YACC_EXECUTABLE} -V OUTPUT_VARIABLE _yacc_full_version)
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string(REGEX MATCH "[1-9]+\.[0-9]+" _yacc_major_minor ${_yacc_full_version})
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if (_yacc_full_version MATCHES "GNU Bison" AND _yacc_major_minor VERSION_GREATER "2.6")
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set(YACC_PURE_PARSER_DIRECTIVE "%define api.pure")
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endif()
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endif()
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MACRO(ADD_YACC_FILES _source _generated)
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FOREACH (_current_FILE ${ARGN})
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configure_file(${_current_FILE}.in ${_current_FILE})
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GET_FILENAME_COMPONENT(_in ${CMAKE_CURRENT_BINARY_DIR}/${_current_FILE} ABSOLUTE)
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GET_FILENAME_COMPONENT(_basename ${_current_FILE} NAME_WE)
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SET(_out ${CMAKE_CURRENT_BINARY_DIR}/${_basename}.c)
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ADD_CUSTOM_COMMAND(
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OUTPUT ${_out}
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COMMAND ${YACC_EXECUTABLE}
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-d
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-p ${_basename}
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-o${_out}
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${_in}
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DEPENDS ${_in}
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)
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LIST(APPEND ${_source} ${_in})
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LIST(APPEND ${_generated} ${_out})
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ENDFOREACH (_current_FILE)
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ENDMACRO(ADD_YACC_FILES)
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