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92 lines
3.8 KiB
92 lines
3.8 KiB
5 months ago
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# Copyright (c) 2009, 2010, 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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#
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# Rules for checking that the abi/api has not changed.
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#
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# The following steps are followed in the do_abi_check rule below
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#
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# 1) Generate preprocessor output for the files that need to
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# be tested for abi/api changes. use -nostdinc to prevent
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# generation of preprocessor output for system headers. This
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# results in messages in stderr saying that these headers
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# were not found. Redirect the stderr output to /dev/null
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# to prevent seeing these messages.
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# 2) sed the output to
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# 2.1) remove blank lines and lines that begin with "# "
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# 2.2) When gcc -E is run on the Mac OS and solaris sparc platforms it
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# introduces a line of output that shows up as a difference between
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# the .pp and .out files. Remove these OS specific preprocessor text
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# inserted by the preprocessor.
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# 3) diff the generated file and the canons (.pp files already in
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# the repository).
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# 4) delete the .out file that is generated.
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#
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# If the diff fails, the generated file is not removed. This will
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# be useful for analysis of ABI differences (e.g. using a visual
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# diff tool).
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#
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# A ABI change that causes a build to fail will always be accompanied
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# by new canons (.out files). The .out files that are not removed will
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# be replaced as the new .pp files.
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#
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# e.g. If include/mysql/plugin.h has an ABI change then this rule would
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# leave a <build directory>/abi_check.out file.
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#
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# A developer with a justified API change will then do a
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# mv <build directory>/abi_check.out include/mysql/plugin.pp
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# to replace the old canons with the new ones.
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#
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SET(abi_check_out ${BINARY_DIR}/abi_check.out)
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FOREACH(file ${ABI_HEADERS})
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GET_FILENAME_COMPONENT(header_basename ${file} NAME)
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SET(tmpfile ${BINARY_DIR}/${header_basename}.pp.tmp)
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EXECUTE_PROCESS(
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COMMAND ${COMPILER}
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-E -nostdinc -dI -DMYSQL_ABI_CHECK -I${SOURCE_DIR}/include
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-I${BINARY_DIR}/include -I${SOURCE_DIR}/include/mysql -I${SOURCE_DIR}/sql
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-I${SOURCE_DIR}/libbinlogevents/export
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${file}
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ERROR_QUIET OUTPUT_FILE ${tmpfile})
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EXECUTE_PROCESS(
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COMMAND sed -e "/^# /d"
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-e "/^[ ]*$/d"
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-e "/^#pragma GCC set_debug_pwd/d"
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-e "/^#ident/d"
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RESULT_VARIABLE result OUTPUT_FILE ${abi_check_out} INPUT_FILE ${tmpfile})
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IF(NOT ${result} EQUAL 0)
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MESSAGE(FATAL_ERROR "sed returned error ${result}")
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ENDIF()
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FILE(REMOVE ${tmpfile})
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EXECUTE_PROCESS(
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COMMAND diff -w ${file}.pp ${abi_check_out} RESULT_VARIABLE result)
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IF(NOT ${result} EQUAL 0)
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MESSAGE(FATAL_ERROR
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"ABI check found difference between ${file}.pp and ${abi_check_out}")
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ENDIF()
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FILE(REMOVE ${abi_check_out})
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ENDFOREACH()
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