FindBISON

Find bison executable and provide a macro 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

The minimum required version of bison can be specified using the standard CMake syntax, e.g. find_package(BISON 2.1.3).

If bison is found, the module defines the macro:

BISON_TARGET(<Name> <YaccInput> <CodeOutput>
             [COMPILE_FLAGS <flags>]
             [DEFINES_FILE <file>]
             [VERBOSE [<file>]]
             [REPORT_FILE <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 is also be generated, and contains the token list.

Changed in version 3.14: When CMP0088 is set to NEW, bison runs in the CMAKE_CURRENT_BINARY_DIR directory.

The options are:

COMPILE_FLAGS <flags>

Specify flags to be added to the bison command line.

DEFINES_FILE <file>

New in version 3.4.

Specify a non-default header <file> to be generated by bison.

VERBOSE [<file>]

Tell bison to write a report file of the grammar and parser.

Deprecated since version 3.7: If <file> is given, it specifies path the report file is copied to. [<file>] is left for backward compatibility of this module. Use VERBOSE REPORT_FILE <file>.

REPORT_FILE <file>

New in version 3.7.

Specify a non-default report <file>, if generated.

The macro defines the following 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

All files generated by bison including the source, the header and the report

BISON_<Name>_COMPILE_FLAGS

Options used in the bison command line

Example usage:

find_package(BISON)
BISON_TARGET(MyParser parser.y ${CMAKE_CURRENT_BINARY_DIR}/parser.cpp
             DEFINES_FILE ${CMAKE_CURRENT_BINARY_DIR}/parser.h)
add_executable(Foo main.cpp ${BISON_MyParser_OUTPUTS})