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55 lines
2.2 KiB
55 lines
2.2 KiB
# Copyright (c) 2009, 2019, Oracle and/or its affiliates. All rights reserved.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License, version 2.0,
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# as published by the Free Software Foundation.
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#
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# This program is also distributed with certain software (including
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# but not limited to OpenSSL) that is licensed under separate terms,
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# as designated in a particular file or component or in included license
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# documentation. The authors of MySQL hereby grant you an additional
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# permission to link the program and your derivative works with the
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# separately licensed software that they have included with MySQL.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License, version 2.0, for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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# This should be REQUIRED, but we have to support source tarball build.
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# https://dev.mysql.com/doc/refman/8.0/en/source-installation.html
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FIND_PACKAGE(BISON)
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IF(NOT BISON_FOUND)
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MESSAGE(WARNING "No bison found!!")
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RETURN()
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ENDIF()
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IF(BISON_VERSION VERSION_LESS "2.1")
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MESSAGE(FATAL_ERROR
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"Bison version ${BISON_VERSION} is old. Please update to version 2.1 or higher"
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)
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ELSE()
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IF(BISON_VERSION VERSION_LESS "2.4")
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# Don't use --warnings since unsupported
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SET(BISON_FLAGS_WARNINGS "" CACHE INTERNAL "BISON 2.x flags")
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ELSEIF(BISON_VERSION VERSION_LESS "3.0")
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# Enable all warnings
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SET(BISON_FLAGS_WARNINGS
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"--warnings=all"
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CACHE INTERNAL "BISON 2.x flags")
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ELSE()
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# TODO: replace with "--warnings=all"
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# For the backward compatibility with 2.x, suppress warnings:
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# * no-yacc: for --yacc
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# * no-empty-rule: for empty rules without %empty
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# * no-precedence: for useless precedence or/and associativity rules
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SET(BISON_FLAGS_WARNINGS
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"--warnings=all,no-yacc,no-empty-rule,no-precedence"
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CACHE INTERNAL "BISON 3.x flags")
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ENDIF()
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ENDIF()
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