diff options
| author | Chris Robinson <[email protected]> | 2014-08-05 05:05:05 -0700 |
|---|---|---|
| committer | Chris Robinson <[email protected]> | 2014-08-05 05:05:05 -0700 |
| commit | 951870b18978eab89391f43c3c5b85e0700eb198 (patch) | |
| tree | 08b1ed3bd32ac06786d795f4215cd748e0ad2fd3 /cmake/CheckFileOffsetBits.cmake | |
| parent | bda39c5038e67bdad0c39a3c311136167aad3d15 (diff) | |
Enable large file support
Diffstat (limited to 'cmake/CheckFileOffsetBits.cmake')
| -rw-r--r-- | cmake/CheckFileOffsetBits.cmake | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/cmake/CheckFileOffsetBits.cmake b/cmake/CheckFileOffsetBits.cmake new file mode 100644 index 00000000..8b549b69 --- /dev/null +++ b/cmake/CheckFileOffsetBits.cmake @@ -0,0 +1,39 @@ +# - Check if the _FILE_OFFSET_BITS macro is needed for large files +# CHECK_FILE_OFFSET_BITS() +# +# The following variables may be set before calling this macro to +# modify the way the check is run: +# +# CMAKE_REQUIRED_FLAGS = string of compile command line flags +# CMAKE_REQUIRED_DEFINITIONS = list of macros to define (-DFOO=bar) +# CMAKE_REQUIRED_INCLUDES = list of include directories +# Copyright (c) 2009, Chris Robinson +# +# Redistribution and use is allowed according to the terms of the LGPL license. + + +MACRO(CHECK_FILE_OFFSET_BITS) + + IF(NOT DEFINED _FILE_OFFSET_BITS) + MESSAGE(STATUS "Checking _FILE_OFFSET_BITS for large files") + TRY_COMPILE(__WITHOUT_FILE_OFFSET_BITS_64 + ${CMAKE_BINARY_DIR} + ${CMAKE_SOURCE_DIR}/cmake/CheckFileOffsetBits.c + COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS}) + IF(NOT __WITHOUT_FILE_OFFSET_BITS_64) + TRY_COMPILE(__WITH_FILE_OFFSET_BITS_64 + ${CMAKE_BINARY_DIR} + ${CMAKE_SOURCE_DIR}/cmake/CheckFileOffsetBits.c + COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS} -D_FILE_OFFSET_BITS=64) + ENDIF(NOT __WITHOUT_FILE_OFFSET_BITS_64) + + IF(NOT __WITHOUT_FILE_OFFSET_BITS_64 AND __WITH_FILE_OFFSET_BITS_64) + SET(_FILE_OFFSET_BITS 64 CACHE INTERNAL "_FILE_OFFSET_BITS macro needed for large files") + MESSAGE(STATUS "Checking _FILE_OFFSET_BITS for large files - 64") + ELSE(NOT __WITHOUT_FILE_OFFSET_BITS_64 AND __WITH_FILE_OFFSET_BITS_64) + SET(_FILE_OFFSET_BITS "" CACHE INTERNAL "_FILE_OFFSET_BITS macro needed for large files") + MESSAGE(STATUS "Checking _FILE_OFFSET_BITS for large files - not needed") + ENDIF(NOT __WITHOUT_FILE_OFFSET_BITS_64 AND __WITH_FILE_OFFSET_BITS_64) + ENDIF(NOT DEFINED _FILE_OFFSET_BITS) + +ENDMACRO(CHECK_FILE_OFFSET_BITS)
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