diff options
Diffstat (limited to 'CMakeModules/CheckLFS.cmake')
| -rw-r--r-- | CMakeModules/CheckLFS.cmake | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/CMakeModules/CheckLFS.cmake b/CMakeModules/CheckLFS.cmake new file mode 100644 index 0000000..e2b0099 --- /dev/null +++ b/CMakeModules/CheckLFS.cmake @@ -0,0 +1,109 @@ +## Checks for large file support ## +include(CheckIncludeFile) +include(CheckSymbolExists) +include(CheckTypeSize) + +macro(check_lfs _isenable) + set(LFS_OFF_T "") + set(LFS_FOPEN "") + set(LFS_FSEEK "") + set(LFS_FTELL "") + set(LFS_PRID "") + + if(${_isenable}) + set(SAFE_CMAKE_REQUIRED_DEFINITIONS "${CMAKE_REQUIRED_DEFINITIONS}") + set(CMAKE_REQUIRED_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS} + -D_LARGEFILE_SOURCE -D_LARGE_FILES -D_FILE_OFFSET_BITS=64 + -D__STDC_LIMIT_MACROS -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS) + + check_include_file("sys/types.h" HAVE_SYS_TYPES_H) + check_include_file("inttypes.h" HAVE_INTTYPES_H) + check_include_file("stddef.h" HAVE_STDDEF_H) + check_include_file("stdint.h" HAVE_STDINT_H) + + # LFS type1: 8 <= sizeof(off_t), fseeko, ftello + check_type_size("off_t" SIZEOF_OFF_T) + if(SIZEOF_OFF_T GREATER 7) + check_symbol_exists("fseeko" "stdio.h" HAVE_FSEEKO) + check_symbol_exists("ftello" "stdio.h" HAVE_FTELLO) + if(HAVE_FSEEKO AND HAVE_FTELLO) + set(LFS_OFF_T "off_t") + set(LFS_FOPEN "fopen") + set(LFS_FSEEK "fseeko") + set(LFS_FTELL "ftello") + check_symbol_exists("PRIdMAX" "inttypes.h" HAVE_PRIDMAX) + if(HAVE_PRIDMAX) + set(LFS_PRID "PRIdMAX") + else(HAVE_PRIDMAX) + check_type_size("long" SIZEOF_LONG) + check_type_size("int" SIZEOF_INT) + if(SIZEOF_OFF_T GREATER SIZEOF_LONG) + set(LFS_PRID "\"lld\"") + elseif(SIZEOF_LONG GREATER SIZEOF_INT) + set(LFS_PRID "\"ld\"") + else(SIZEOF_OFF_T GREATER SIZEOF_LONG) + set(LFS_PRID "\"d\"") + endif(SIZEOF_OFF_T GREATER SIZEOF_LONG) + endif(HAVE_PRIDMAX) + endif(HAVE_FSEEKO AND HAVE_FTELLO) + endif(SIZEOF_OFF_T GREATER 7) + + # LFS type2: 8 <= sizeof(off64_t), fopen64, fseeko64, ftello64 + if(NOT LFS_OFF_T) + check_type_size("off64_t" SIZEOF_OFF64_T) + if(SIZEOF_OFF64_T GREATER 7) + check_symbol_exists("fopen64" "stdio.h" HAVE_FOPEN64) + check_symbol_exists("fseeko64" "stdio.h" HAVE_FSEEKO64) + check_symbol_exists("ftello64" "stdio.h" HAVE_FTELLO64) + if(HAVE_FOPEN64 AND HAVE_FSEEKO64 AND HAVE_FTELLO64) + set(LFS_OFF_T "off64_t") + set(LFS_FOPEN "fopen64") + set(LFS_FSEEK "fseeko64") + set(LFS_FTELL "ftello64") + check_symbol_exists("PRIdMAX" "inttypes.h" HAVE_PRIDMAX) + if(HAVE_PRIDMAX) + set(LFS_PRID "PRIdMAX") + else(HAVE_PRIDMAX) + check_type_size("long" SIZEOF_LONG) + check_type_size("int" SIZEOF_INT) + if(SIZEOF_OFF64_T GREATER SIZEOF_LONG) + set(LFS_PRID "\"lld\"") + elseif(SIZEOF_LONG GREATER SIZEOF_INT) + set(LFS_PRID "\"ld\"") + else(SIZEOF_OFF64_T GREATER SIZEOF_LONG) + set(LFS_PRID "\"d\"") + endif(SIZEOF_OFF64_T GREATER SIZEOF_LONG) + endif(HAVE_PRIDMAX) + endif(HAVE_FOPEN64 AND HAVE_FSEEKO64 AND HAVE_FTELLO64) + endif(SIZEOF_OFF64_T GREATER 7) + endif(NOT LFS_OFF_T) + + # LFS type3: 8 <= sizeof(__int64), _fseeki64, _ftelli64 + if(NOT LFS_OFF_T) + check_type_size("__int64" SIZEOF___INT64) + if(SIZEOF___INT64 GREATER 7) + check_symbol_exists("_fseeki64" "stdio.h" HAVE__FSEEKI64) + check_symbol_exists("_ftelli64" "stdio.h" HAVE__FTELLI64) + if(HAVE__FSEEKI64 AND HAVE__FTELLI64) + set(LFS_OFF_T "__int64") + set(LFS_FOPEN "fopen") + set(LFS_FSEEK "_fseeki64") + set(LFS_FTELL "_ftelli64") + set(LFS_PRID "\"I64d\"") + endif(HAVE__FSEEKI64 AND HAVE__FTELLI64) + endif(SIZEOF___INT64 GREATER 7) + endif(NOT LFS_OFF_T) + + set(CMAKE_REQUIRED_DEFINITIONS "${SAFE_CMAKE_REQUIRED_DEFINITIONS}") + endif(${_isenable}) + + if(NOT LFS_OFF_T) + ## not found + set(LFS_OFF_T "long") + set(LFS_FOPEN "fopen") + set(LFS_FSEEK "fseek") + set(LFS_FTELL "ftell") + set(LFS_PRID "\"ld\"") + endif(NOT LFS_OFF_T) + +endmacro(check_lfs) |