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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copyright/license notice headers that spell out copyright holder names and years are hard to maintain and often out-of-date or plain wrong.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.
66 lines
2.5 KiB
CMake
66 lines
2.5 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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#.rst:
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# FindLibArchive
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# --------------
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#
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# Find libarchive library and headers
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#
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# The module defines the following variables:
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#
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# ::
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#
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# LibArchive_FOUND - true if libarchive was found
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# LibArchive_INCLUDE_DIRS - include search path
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# LibArchive_LIBRARIES - libraries to link
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# LibArchive_VERSION - libarchive 3-component version number
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find_path(LibArchive_INCLUDE_DIR
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NAMES archive.h
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PATHS
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"[HKEY_LOCAL_MACHINE\\SOFTWARE\\GnuWin32\\LibArchive;InstallPath]/include"
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)
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find_library(LibArchive_LIBRARY
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NAMES archive libarchive
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PATHS
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"[HKEY_LOCAL_MACHINE\\SOFTWARE\\GnuWin32\\LibArchive;InstallPath]/lib"
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)
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mark_as_advanced(LibArchive_INCLUDE_DIR LibArchive_LIBRARY)
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# Extract the version number from the header.
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if(LibArchive_INCLUDE_DIR AND EXISTS "${LibArchive_INCLUDE_DIR}/archive.h")
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# The version string appears in one of three known formats in the header:
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# #define ARCHIVE_LIBRARY_VERSION "libarchive 2.4.12"
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# #define ARCHIVE_VERSION_STRING "libarchive 2.8.4"
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# #define ARCHIVE_VERSION_ONLY_STRING "3.2.0"
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# Match any format.
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set(_LibArchive_VERSION_REGEX "^#define[ \t]+ARCHIVE[_A-Z]+VERSION[_A-Z]*[ \t]+\"(libarchive +)?([0-9]+)\\.([0-9]+)\\.([0-9]+)[^\"]*\".*$")
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file(STRINGS "${LibArchive_INCLUDE_DIR}/archive.h" _LibArchive_VERSION_STRING LIMIT_COUNT 1 REGEX "${_LibArchive_VERSION_REGEX}")
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if(_LibArchive_VERSION_STRING)
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string(REGEX REPLACE "${_LibArchive_VERSION_REGEX}" "\\2.\\3.\\4" LibArchive_VERSION "${_LibArchive_VERSION_STRING}")
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endif()
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unset(_LibArchive_VERSION_REGEX)
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unset(_LibArchive_VERSION_STRING)
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endif()
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# Handle the QUIETLY and REQUIRED arguments and set LIBARCHIVE_FOUND
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# to TRUE if all listed variables are TRUE.
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# (Use ${CMAKE_ROOT}/Modules instead of ${CMAKE_CURRENT_LIST_DIR} because CMake
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# itself includes this FindLibArchive when built with an older CMake that does
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# not provide it. The older CMake also does not have CMAKE_CURRENT_LIST_DIR.)
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include(${CMAKE_ROOT}/Modules/FindPackageHandleStandardArgs.cmake)
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find_package_handle_standard_args(LibArchive
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REQUIRED_VARS LibArchive_LIBRARY LibArchive_INCLUDE_DIR
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VERSION_VAR LibArchive_VERSION
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)
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set(LibArchive_FOUND ${LIBARCHIVE_FOUND})
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unset(LIBARCHIVE_FOUND)
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if(LibArchive_FOUND)
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set(LibArchive_INCLUDE_DIRS ${LibArchive_INCLUDE_DIR})
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set(LibArchive_LIBRARIES ${LibArchive_LIBRARY})
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endif()
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