efc427fdce
This adds a cmake module, FindABIMap, which looks for abimap and provides functions to generate a symbol version linker script. The module can be included using find_package(ABIMap). This also adds the option to compile with symbol versioning. The symbol list is obtained from the header files by filtering those marked with the LIBSSH_API modifier. Such symbols are used as input to generate the version script used by the linker. The version script is automatically updated as new symbols marked with LIBSSH_API are added to the header files. If any symbol is removed, the build will fail due to break in the ABI. Symbol versioning is enabled by default if abimap has been found. It is disabled in non-UNIX platforms. It can be disabled by passing "-DWITH_SYMBOL_VERSIONING=OFF" option to cmake. Pair-Programmed-With: Andreas Schneider <asn@cryptomilk.org> Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com> Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
89 строки
2.3 KiB
CMake
89 строки
2.3 KiB
CMake
#
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# Copyright (c) 2018 Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
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#
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# Redistribution and use is allowed according to the terms of the New
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# BSD license.
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# For details see the accompanying COPYING-CMAKE-SCRIPTS file.
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#
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#.rst:
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# ExtractSymbols
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# --------------
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#
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# This is a helper script for FindABImap.cmake.
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#
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# Extract symbols from header files and output a list to a file.
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# This script is run in build time to extract symbols from the provided header
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# files. This way, symbols added or removed can be checked and used to update
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# the symbol version script.
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#
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# All symbols followed by the character ``'('`` are extracted. If a
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# ``FILTER_PATTERN`` is provided, only the lines containing the given string are
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# considered.
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#
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# Expected defined variables
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# --------------------------
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#
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# ``HEADERS_LIST_FILE``:
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# Required, expects a file containing the list of header files to be parsed.
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#
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# ``OUTPUT_PATH``:
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# Required, expects the output file path.
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#
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# Optionally defined variables
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# ----------------------------
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#
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# ``FILTER_PATTERN``:
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# Expects a string. Only lines containing the given string will be considered
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# when extracting symbols.
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#
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if (NOT DEFINED OUTPUT_PATH)
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message(SEND_ERROR "OUTPUT_PATH not defined")
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endif()
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if (NOT DEFINED HEADERS_LIST_FILE)
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message(SEND_ERROR "HEADERS not defined")
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endif()
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file(READ ${HEADERS_LIST_FILE} HEADERS_LIST)
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set(symbols)
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foreach(header ${HEADERS_LIST})
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# Filter only lines containing the FILTER_PATTERN
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file(STRINGS ${header} contain_filter
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REGEX "^.*${FILTER_PATTERN}.*[(]"
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)
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# Remove function-like macros
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foreach(line ${contain_filter})
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if (NOT ${line} MATCHES ".*#[ ]*define")
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list(APPEND not_macro ${line})
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endif()
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endforeach()
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set(functions)
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# Get only the function names followed by '('
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foreach(line ${not_macro})
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string(REGEX MATCHALL "[a-zA-Z0-9_]+[ ]*[(]" func ${line})
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list(APPEND functions ${func})
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endforeach()
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set(extracted_symbols)
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# Remove '('
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foreach(line ${functions})
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string(REGEX REPLACE "[(]" "" symbol ${line})
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string(STRIP "${symbol}" symbol)
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list(APPEND extracted_symbols ${symbol})
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endforeach()
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list(APPEND symbols ${extracted_symbols})
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endforeach()
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list(REMOVE_DUPLICATES symbols)
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file(WRITE ${OUTPUT_PATH} "${symbols}")
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