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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copyright/license notice headers that spell out copyright holder names and years are hard to maintain and often out-of-date or plain wrong.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.
110 lines
4.1 KiB
CMake
110 lines
4.1 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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# TestBigEndian
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# -------------
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#
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# Define macro to determine endian type
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#
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# Check if the system is big endian or little endian
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#
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# ::
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#
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# TEST_BIG_ENDIAN(VARIABLE)
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# VARIABLE - variable to store the result to
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macro(TEST_BIG_ENDIAN VARIABLE)
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if(NOT DEFINED HAVE_${VARIABLE})
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message(STATUS "Check if the system is big endian")
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message(STATUS "Searching 16 bit integer")
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include(CheckTypeSize)
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CHECK_TYPE_SIZE("unsigned short" CMAKE_SIZEOF_UNSIGNED_SHORT)
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if(CMAKE_SIZEOF_UNSIGNED_SHORT EQUAL 2)
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message(STATUS "Using unsigned short")
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set(CMAKE_16BIT_TYPE "unsigned short")
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else()
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CHECK_TYPE_SIZE("unsigned int" CMAKE_SIZEOF_UNSIGNED_INT)
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if(CMAKE_SIZEOF_UNSIGNED_INT)
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message(STATUS "Using unsigned int")
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set(CMAKE_16BIT_TYPE "unsigned int")
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else()
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CHECK_TYPE_SIZE("unsigned long" CMAKE_SIZEOF_UNSIGNED_LONG)
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if(CMAKE_SIZEOF_UNSIGNED_LONG)
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message(STATUS "Using unsigned long")
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set(CMAKE_16BIT_TYPE "unsigned long")
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else()
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message(FATAL_ERROR "no suitable type found")
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endif()
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endif()
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endif()
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configure_file("${CMAKE_ROOT}/Modules/TestEndianess.c.in"
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"${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/TestEndianess.c"
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@ONLY)
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file(READ "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/TestEndianess.c"
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TEST_ENDIANESS_FILE_CONTENT)
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try_compile(HAVE_${VARIABLE}
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"${CMAKE_BINARY_DIR}"
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"${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/TestEndianess.c"
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OUTPUT_VARIABLE OUTPUT
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COPY_FILE "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/TestEndianess.bin" )
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if(HAVE_${VARIABLE})
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file(STRINGS "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/TestEndianess.bin"
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CMAKE_TEST_ENDIANESS_STRINGS_LE LIMIT_COUNT 1 REGEX "THIS IS LITTLE ENDIAN")
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file(STRINGS "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/TestEndianess.bin"
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CMAKE_TEST_ENDIANESS_STRINGS_BE LIMIT_COUNT 1 REGEX "THIS IS BIG ENDIAN")
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# on mac, if there are universal binaries built both will be true
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# return the result depending on the machine on which cmake runs
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if(CMAKE_TEST_ENDIANESS_STRINGS_BE AND CMAKE_TEST_ENDIANESS_STRINGS_LE)
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if(CMAKE_SYSTEM_PROCESSOR MATCHES powerpc)
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set(CMAKE_TEST_ENDIANESS_STRINGS_BE TRUE)
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set(CMAKE_TEST_ENDIANESS_STRINGS_LE FALSE)
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else()
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set(CMAKE_TEST_ENDIANESS_STRINGS_BE FALSE)
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set(CMAKE_TEST_ENDIANESS_STRINGS_LE TRUE)
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endif()
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message(STATUS "TEST_BIG_ENDIAN found different results, consider setting CMAKE_OSX_ARCHITECTURES or CMAKE_TRY_COMPILE_OSX_ARCHITECTURES to one or no architecture !")
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endif()
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if(CMAKE_TEST_ENDIANESS_STRINGS_LE)
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set(${VARIABLE} 0 CACHE INTERNAL "Result of TEST_BIG_ENDIAN" FORCE)
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message(STATUS "Check if the system is big endian - little endian")
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endif()
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if(CMAKE_TEST_ENDIANESS_STRINGS_BE)
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set(${VARIABLE} 1 CACHE INTERNAL "Result of TEST_BIG_ENDIAN" FORCE)
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message(STATUS "Check if the system is big endian - big endian")
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endif()
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if(NOT CMAKE_TEST_ENDIANESS_STRINGS_BE AND NOT CMAKE_TEST_ENDIANESS_STRINGS_LE)
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message(SEND_ERROR "TEST_BIG_ENDIAN found no result!")
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endif()
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file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
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"Determining if the system is big endian passed with the following output:\n${OUTPUT}\nTestEndianess.c:\n${TEST_ENDIANESS_FILE_CONTENT}\n\n")
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else()
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message(STATUS "Check if the system is big endian - failed")
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file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
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"Determining if the system is big endian failed with the following output:\n${OUTPUT}\nTestEndianess.c:\n${TEST_ENDIANESS_FILE_CONTENT}\n\n")
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set(${VARIABLE})
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endif()
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endif()
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endmacro()
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