You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
100 lines
4.5 KiB
100 lines
4.5 KiB
# - Define macro to determine endian type
|
|
# Check if the system is big endian or little endian
|
|
# TEST_BIG_ENDIAN(VARIABLE)
|
|
# VARIABLE - variable to store the result to
|
|
#
|
|
|
|
MACRO(TEST_BIG_ENDIAN VARIABLE)
|
|
IF("HAVE_${VARIABLE}" MATCHES "^HAVE_${VARIABLE}$")
|
|
MESSAGE(STATUS "Check if the system is big endian")
|
|
MESSAGE(STATUS "Searching 16 bit integer")
|
|
|
|
INCLUDE(CheckTypeSize)
|
|
|
|
CHECK_TYPE_SIZE("unsigned short" CMAKE_SIZEOF_UNSIGNED_SHORT)
|
|
IF(CMAKE_SIZEOF_UNSIGNED_SHORT EQUAL 2)
|
|
MESSAGE(STATUS "Using unsigned short")
|
|
SET(CMAKE_16BIT_TYPE "unsigned short")
|
|
ELSE(CMAKE_SIZEOF_UNSIGNED_SHORT EQUAL 2)
|
|
CHECK_TYPE_SIZE("unsigned int" CMAKE_SIZEOF_UNSIGNED_INT)
|
|
IF(CMAKE_SIZEOF_UNSIGNED_INT)
|
|
MESSAGE(STATUS "Using unsigned int")
|
|
SET(CMAKE_16BIT_TYPE "unsigned int")
|
|
|
|
ELSE(CMAKE_SIZEOF_UNSIGNED_INT)
|
|
|
|
CHECK_TYPE_SIZE("unsigned long" CMAKE_SIZEOF_UNSIGNED_LONG)
|
|
IF(CMAKE_SIZEOF_UNSIGNED_LONG)
|
|
MESSAGE(STATUS "Using unsigned long")
|
|
SET(CMAKE_16BIT_TYPE "unsigned long")
|
|
ELSE(CMAKE_SIZEOF_UNSIGNED_LONG)
|
|
MESSAGE(FATAL_ERROR "no suitable type found")
|
|
ENDIF(CMAKE_SIZEOF_UNSIGNED_LONG)
|
|
|
|
ENDIF(CMAKE_SIZEOF_UNSIGNED_INT)
|
|
|
|
ENDIF(CMAKE_SIZEOF_UNSIGNED_SHORT EQUAL 2)
|
|
|
|
|
|
CONFIGURE_FILE("${CMAKE_ROOT}/Modules/TestEndianess.c.in"
|
|
"${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/TestEndianess.c"
|
|
IMMEDIATE @ONLY)
|
|
|
|
FILE(READ "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/TestEndianess.c"
|
|
TEST_ENDIANESS_FILE_CONTENT)
|
|
|
|
TRY_COMPILE(HAVE_${VARIABLE}
|
|
"${CMAKE_BINARY_DIR}"
|
|
"${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/TestEndianess.c"
|
|
OUTPUT_VARIABLE OUTPUT
|
|
COPY_FILE "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/TestEndianess.bin" )
|
|
|
|
IF(HAVE_${VARIABLE})
|
|
|
|
FILE(STRINGS "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/TestEndianess.bin"
|
|
CMAKE_TEST_ENDIANESS_STRINGS_LE LIMIT_COUNT 1 REGEX "THIS IS LITTLE ENDIAN")
|
|
|
|
FILE(STRINGS "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/TestEndianess.bin"
|
|
CMAKE_TEST_ENDIANESS_STRINGS_BE LIMIT_COUNT 1 REGEX "THIS IS BIG ENDIAN")
|
|
|
|
# on mac, if there are universal binaries built both will be true
|
|
# return the result depending on the machine on which cmake runs
|
|
IF(CMAKE_TEST_ENDIANESS_STRINGS_BE AND CMAKE_TEST_ENDIANESS_STRINGS_LE)
|
|
IF(CMAKE_SYSTEM_PROCESSOR MATCHES powerpc)
|
|
SET(CMAKE_TEST_ENDIANESS_STRINGS_BE TRUE)
|
|
SET(CMAKE_TEST_ENDIANESS_STRINGS_LE FALSE)
|
|
ELSE(CMAKE_SYSTEM_PROCESSOR MATCHES powerpc)
|
|
SET(CMAKE_TEST_ENDIANESS_STRINGS_BE FALSE)
|
|
SET(CMAKE_TEST_ENDIANESS_STRINGS_LE TRUE)
|
|
ENDIF(CMAKE_SYSTEM_PROCESSOR MATCHES powerpc)
|
|
MESSAGE(STATUS "TEST_BIG_ENDIAN found different results, consider setting CMAKE_OSX_ARCHITECTURES or CMAKE_TRY_COMPILE_OSX_ARCHITECTURES to one or no architecture !")
|
|
ENDIF(CMAKE_TEST_ENDIANESS_STRINGS_BE AND CMAKE_TEST_ENDIANESS_STRINGS_LE)
|
|
|
|
IF(CMAKE_TEST_ENDIANESS_STRINGS_LE)
|
|
SET(${VARIABLE} 0 CACHE INTERNAL "Result of TEST_BIG_ENDIAN" FORCE)
|
|
MESSAGE(STATUS "Check if the system is big endian - little endian")
|
|
ENDIF(CMAKE_TEST_ENDIANESS_STRINGS_LE)
|
|
|
|
IF(CMAKE_TEST_ENDIANESS_STRINGS_BE)
|
|
SET(${VARIABLE} 1 CACHE INTERNAL "Result of TEST_BIG_ENDIAN" FORCE)
|
|
MESSAGE(STATUS "Check if the system is big endian - big endian")
|
|
ENDIF(CMAKE_TEST_ENDIANESS_STRINGS_BE)
|
|
|
|
IF(NOT CMAKE_TEST_ENDIANESS_STRINGS_BE AND NOT CMAKE_TEST_ENDIANESS_STRINGS_LE)
|
|
MESSAGE(SEND_ERROR "TEST_BIG_ENDIAN found no result!")
|
|
ENDIF(NOT CMAKE_TEST_ENDIANESS_STRINGS_BE AND NOT CMAKE_TEST_ENDIANESS_STRINGS_LE)
|
|
|
|
FILE(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
|
|
"Determining if the system is big endian passed with the following output:\n${OUTPUT}\nTestEndianess.c:\n${TEST_ENDIANESS_FILE_CONTENT}\n\n")
|
|
|
|
ELSE(HAVE_${VARIABLE})
|
|
MESSAGE(STATUS "Check if the system is big endian - failed")
|
|
FILE(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
|
|
"Determining if the system is big endian failed with the following output:\n${OUTPUT}\nTestEndianess.c:\n${TEST_ENDIANESS_FILE_CONTENT}\n\n")
|
|
SET(${VARIABLE})
|
|
ENDIF(HAVE_${VARIABLE})
|
|
ENDIF("HAVE_${VARIABLE}" MATCHES "^HAVE_${VARIABLE}$")
|
|
ENDMACRO(TEST_BIG_ENDIAN)
|
|
|
|
|