Uploaded Test files
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# 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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Define macro to determine endian type
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Check if the system is big endian or little endian
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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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#]=======================================================================]
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include(CheckTypeSize)
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macro(TEST_BIG_ENDIAN VARIABLE)
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if(NOT DEFINED HAVE_${VARIABLE})
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message(CHECK_START "Check if the system is big endian")
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message(CHECK_START "Searching 16 bit integer")
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if(CMAKE_C_COMPILER_LOADED)
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set(_test_language "C")
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elseif(CMAKE_CXX_COMPILER_LOADED)
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set(_test_language "CXX")
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else()
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message(FATAL_ERROR "TEST_BIG_ENDIAN needs either C or CXX language enabled")
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endif()
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CHECK_TYPE_SIZE("unsigned short" CMAKE_SIZEOF_UNSIGNED_SHORT LANGUAGE ${_test_language})
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if(CMAKE_SIZEOF_UNSIGNED_SHORT EQUAL 2)
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message(CHECK_PASS "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 LANGUAGE ${_test_language})
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if(CMAKE_SIZEOF_UNSIGNED_INT)
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message(CHECK_PASS "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 LANGUAGE ${_test_language})
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if(CMAKE_SIZEOF_UNSIGNED_LONG)
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message(CHECK_PASS "Using unsigned long")
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set(CMAKE_16BIT_TYPE "unsigned long")
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else()
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message(FATAL_ERROR "no suitable type found")
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endif()
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endif()
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endif()
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if(_test_language STREQUAL "CXX")
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set(_test_file "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/TestEndianess.cpp")
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else()
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set(_test_file "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/TestEndianess.c")
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endif()
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configure_file("${CMAKE_ROOT}/Modules/TestEndianess.c.in"
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${_test_file}
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@ONLY)
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file(READ ${_test_file} TEST_ENDIANESS_FILE_CONTENT)
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try_compile(HAVE_${VARIABLE}
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"${CMAKE_BINARY_DIR}"
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${_test_file}
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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(CHECK_PASS "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(CHECK_PASS "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(CHECK_FAIL "TEST_BIG_ENDIAN found no result!")
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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(CHECK_FAIL "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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