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# Copyright (c) 2009 Sun Microsystems, Inc.
# Use is subject to license terms.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
IF(CMAKE_SYSTEM_NAME MATCHES "SunOS")
# On Solaris, /opt/csw often contains a newer bison
IF(NOT BISON_EXECUTABLE AND EXISTS /opt/csw/bin/bison)
SET(BISON_EXECUTABLE /opt/csw/bin/bison)
ENDIF()
ENDIF()
FIND_PROGRAM(BISON_EXECUTABLE bison DOC "path to the bison executable")
MARK_AS_ADVANCED(BISON_EXECUTABLE "")
IF(NOT BISON_EXECUTABLE)
MESSAGE("Warning: Bison executable not found in PATH")
ELSEIF(BISON_EXECUTABLE AND NOT BISON_USABLE)
# Check version as well
EXEC_PROGRAM(${BISON_EXECUTABLE} ARGS --version OUTPUT_VARIABLE BISON_VERSION_STR)
# Get first line in case it's multiline
STRING(REGEX REPLACE "([^\n]+).*" "\\1" FIRST_LINE "${BISON_VERSION_STR}")
# get version information
STRING(REGEX REPLACE ".* ([0-9]+)\\.([0-9]+)" "\\1" BISON_VERSION_MAJOR "${FIRST_LINE}")
STRING(REGEX REPLACE ".* ([0-9]+)\\.([0-9]+)" "\\2" BISON_VERSION_MINOR "${FIRST_LINE}")
IF (BISON_VERSION_MAJOR LESS 2)
MESSAGE("Warning: bison version is old. please update to version 2")
ELSE()
SET(BISON_USABLE 1 CACHE INTERNAL "Bison version 2 or higher")
ENDIF()
ENDIF()
# Use bison to generate C++ and header file
MACRO (RUN_BISON input_yy output_cc output_h name_prefix)
IF(BISON_TOO_OLD)
IF(EXISTS ${output_cc} AND EXISTS ${output_h})
SET(BISON_USABLE FALSE)
ENDIF()
ENDIF()
IF(BISON_USABLE)
# Workaround for VS regenerating output even
# when outputs are up-to-date. At least, fix output timestamp
# after build so that files that depend on generated header are
# not rebuilt.
IF(CMAKE_GENERATOR MATCHES "Visual Studio")
FIND_PROGRAM(TOUCH_EXECUTABLE touch DOC "Path to touch executable"
PATHS "C:/Program Files/Git/usr/bin"
"C:/Program Files (x86)/Git/usr/bin")
IF(TOUCH_EXECUTABLE)
SET(VS_FIX_OUTPUT_TIMESTAMPS
COMMAND ${TOUCH_EXECUTABLE} -r ${input_yy} ${output_cc}
COMMAND ${TOUCH_EXECUTABLE} -r ${input_yy} ${output_h})
ENDIF()
ENDIF()
ADD_CUSTOM_COMMAND(
OUTPUT ${output_cc}
${output_h}
COMMAND ${BISON_EXECUTABLE} -y -p ${name_prefix}
--output=${output_cc}
--defines=${output_h}
${input_yy}
${VS_FIX_OUTPUT_TIMESTAMPS}
DEPENDS ${input_yy}
)
ELSE()
# Bison is missing or not usable, e.g too old
IF(EXISTS ${output_cc} AND EXISTS ${output_h})
IF(${input_yy} IS_NEWER_THAN ${output_cc} OR ${input_yy} IS_NEWER_THAN ${output_h})
# Possibly timestamps are messed up in source distribution.
MESSAGE("Warning: no usable bison found, ${input_yy} will not be rebuilt.")
ENDIF()
ELSE()
# Output files are missing, bail out.
SET(ERRMSG
"Bison (GNU parser generator) is required to build MySQL."
"Please install bison."
)
IF(WIN32)
SET(ERRMSG ${ERRMSG}
"You can download bison from http://gnuwin32.sourceforge.net/packages/bison.htm "
"Choose 'Complete package, except sources' installation. We recommend to "
"install bison into a directory without spaces, e.g C:\\GnuWin32.")
ENDIF()
MESSAGE(FATAL_ERROR ${ERRMSG})
ENDIF()
ENDIF()
ENDMACRO()
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