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86578eccf2
Per-source copyright/license notice headers that spell out copyright holder names and years are hard to maintain and often out-of-date or plain wrong. Precise contributor information is already maintained automatically by the version control tool. Ultimately it is the receiver of a file who is responsible for determining its licensing status, and per-source notices are merely a convenience. Therefore it is simpler and more accurate for each source to have a generic notice of the license name and references to more detailed information on copyright holders and full license terms. Our `Copyright.txt` file now contains a list of Contributors whose names appeared source-level copyright notices. It also references version control history for more precise information. Therefore we no longer need to spell out the list of Contributors in each source file notice. Replace CMake per-source copyright/license notice headers with a short description of the license and links to `Copyright.txt` and online information available from "https://cmake.org/licensing". The online URL also handles cases of modules being copied out of our source into other projects, so we can drop our notices about replacing links with full license text. Run the `Utilities/Scripts/filter-notices.bash` script to perform the majority of the replacements mechanically. Manually fix up shebang lines and trailing newlines in a few files. Manually update the notices in a few files that the script does not handle.
45 lines
2.2 KiB
CMake
45 lines
2.2 KiB
CMake
# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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# file Copyright.txt or https://cmake.org/licensing for details.
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# This module is shared by multiple languages; use include blocker.
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if(__COMPILER_XL)
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return()
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endif()
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set(__COMPILER_XL 1)
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# Find the CreateExportList program that comes with this toolchain.
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find_program(CMAKE_XL_CreateExportList
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NAMES CreateExportList
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DOC "IBM XL CreateExportList tool"
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)
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macro(__compiler_xl lang)
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# Feature flags.
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set(CMAKE_${lang}_VERBOSE_FLAG "-V")
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set(CMAKE_${lang}_COMPILE_OPTIONS_PIC "-qpic")
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string(APPEND CMAKE_${lang}_FLAGS_DEBUG_INIT " -g")
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string(APPEND CMAKE_${lang}_FLAGS_RELEASE_INIT " -O")
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string(APPEND CMAKE_${lang}_FLAGS_MINSIZEREL_INIT " -O")
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string(APPEND CMAKE_${lang}_FLAGS_RELWITHDEBINFO_INIT " -g")
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set(CMAKE_${lang}_CREATE_PREPROCESSED_SOURCE "<CMAKE_${lang}_COMPILER> <DEFINES> <INCLUDES> <FLAGS> -E <SOURCE> > <PREPROCESSED_SOURCE>")
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set(CMAKE_${lang}_CREATE_ASSEMBLY_SOURCE "<CMAKE_${lang}_COMPILER> <DEFINES> <INCLUDES> <FLAGS> -S <SOURCE> -o <ASSEMBLY_SOURCE>")
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# CMAKE_XL_CreateExportList is part of the AIX XL compilers but not the linux ones.
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# If we found the tool, we'll use it to create exports, otherwise stick with the regular
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# create shared library compile line.
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if (CMAKE_XL_CreateExportList)
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# The compiler front-end passes all object files, archive files, and shared
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# library files named on the command line to CreateExportList to create a
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# list of all symbols to be exported from the shared library. This causes
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# all archive members to be copied into the shared library whether they are
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# needed or not. Instead we run the tool ourselves to pass only the object
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# files so that we export only the symbols actually provided by the sources.
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set(CMAKE_${lang}_CREATE_SHARED_LIBRARY
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"${CMAKE_XL_CreateExportList} <OBJECT_DIR>/objects.exp <OBJECTS>"
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"<CMAKE_${lang}_COMPILER> <CMAKE_SHARED_LIBRARY_${lang}_FLAGS> <LANGUAGE_COMPILE_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_${lang}_FLAGS> -Wl,-bE:<OBJECT_DIR>/objects.exp <SONAME_FLAG><TARGET_SONAME> -o <TARGET> <OBJECTS> <LINK_LIBRARIES>"
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)
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endif()
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endmacro()
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