1 ## Checks for large file support ## 2 include(CheckIncludeFile) 3 include(CheckSymbolExists) 4 include(CheckTypeSize) 5 6 macro(check_lfs _isenable) 7 set(LFS_OFF_T "") 8 set(LFS_FOPEN "") 9 set(LFS_FSEEK "") 10 set(LFS_FTELL "") 11 set(LFS_PRID "") 12 13 if(${_isenable}) 14 set(SAFE_CMAKE_REQUIRED_DEFINITIONS "${CMAKE_REQUIRED_DEFINITIONS}") 15 set(CMAKE_REQUIRED_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS} 16 -D_LARGEFILE_SOURCE -D_LARGE_FILES -D_FILE_OFFSET_BITS=64 17 -D__STDC_LIMIT_MACROS -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS) 18 19 check_include_file("sys/types.h" HAVE_SYS_TYPES_H) 20 check_include_file("inttypes.h" HAVE_INTTYPES_H) 21 check_include_file("stddef.h" HAVE_STDDEF_H) 22 check_include_file("stdint.h" HAVE_STDINT_H) 23 24 # LFS type1: 8 <= sizeof(off_t), fseeko, ftello 25 check_type_size("off_t" SIZEOF_OFF_T) 26 if(SIZEOF_OFF_T GREATER 7) 27 check_symbol_exists("fseeko" "stdio.h" HAVE_FSEEKO) 28 check_symbol_exists("ftello" "stdio.h" HAVE_FTELLO) 29 if(HAVE_FSEEKO AND HAVE_FTELLO) 30 set(LFS_OFF_T "off_t") 31 set(LFS_FOPEN "fopen") 32 set(LFS_FSEEK "fseeko") 33 set(LFS_FTELL "ftello") 34 check_symbol_exists("PRIdMAX" "inttypes.h" HAVE_PRIDMAX) 35 if(HAVE_PRIDMAX) 36 set(LFS_PRID "PRIdMAX") 37 else(HAVE_PRIDMAX) 38 check_type_size("long" SIZEOF_LONG) 39 check_type_size("int" SIZEOF_INT) 40 if(SIZEOF_OFF_T GREATER SIZEOF_LONG) 41 set(LFS_PRID "\"lld\"") 42 elseif(SIZEOF_LONG GREATER SIZEOF_INT) 43 set(LFS_PRID "\"ld\"") 44 else(SIZEOF_OFF_T GREATER SIZEOF_LONG) 45 set(LFS_PRID "\"d\"") 46 endif(SIZEOF_OFF_T GREATER SIZEOF_LONG) 47 endif(HAVE_PRIDMAX) 48 endif(HAVE_FSEEKO AND HAVE_FTELLO) 49 endif(SIZEOF_OFF_T GREATER 7) 50 51 # LFS type2: 8 <= sizeof(off64_t), fopen64, fseeko64, ftello64 52 if(NOT LFS_OFF_T) 53 check_type_size("off64_t" SIZEOF_OFF64_T) 54 if(SIZEOF_OFF64_T GREATER 7) 55 check_symbol_exists("fopen64" "stdio.h" HAVE_FOPEN64) 56 check_symbol_exists("fseeko64" "stdio.h" HAVE_FSEEKO64) 57 check_symbol_exists("ftello64" "stdio.h" HAVE_FTELLO64) 58 if(HAVE_FOPEN64 AND HAVE_FSEEKO64 AND HAVE_FTELLO64) 59 set(LFS_OFF_T "off64_t") 60 set(LFS_FOPEN "fopen64") 61 set(LFS_FSEEK "fseeko64") 62 set(LFS_FTELL "ftello64") 63 check_symbol_exists("PRIdMAX" "inttypes.h" HAVE_PRIDMAX) 64 if(HAVE_PRIDMAX) 65 set(LFS_PRID "PRIdMAX") 66 else(HAVE_PRIDMAX) 67 check_type_size("long" SIZEOF_LONG) 68 check_type_size("int" SIZEOF_INT) 69 if(SIZEOF_OFF64_T GREATER SIZEOF_LONG) 70 set(LFS_PRID "\"lld\"") 71 elseif(SIZEOF_LONG GREATER SIZEOF_INT) 72 set(LFS_PRID "\"ld\"") 73 else(SIZEOF_OFF64_T GREATER SIZEOF_LONG) 74 set(LFS_PRID "\"d\"") 75 endif(SIZEOF_OFF64_T GREATER SIZEOF_LONG) 76 endif(HAVE_PRIDMAX) 77 endif(HAVE_FOPEN64 AND HAVE_FSEEKO64 AND HAVE_FTELLO64) 78 endif(SIZEOF_OFF64_T GREATER 7) 79 endif(NOT LFS_OFF_T) 80 81 # LFS type3: 8 <= sizeof(__int64), _fseeki64, _ftelli64 82 if(NOT LFS_OFF_T) 83 check_type_size("__int64" SIZEOF___INT64) 84 if(SIZEOF___INT64 GREATER 7) 85 check_symbol_exists("_fseeki64" "stdio.h" HAVE__FSEEKI64) 86 check_symbol_exists("_ftelli64" "stdio.h" HAVE__FTELLI64) 87 if(HAVE__FSEEKI64 AND HAVE__FTELLI64) 88 set(LFS_OFF_T "__int64") 89 set(LFS_FOPEN "fopen") 90 set(LFS_FSEEK "_fseeki64") 91 set(LFS_FTELL "_ftelli64") 92 set(LFS_PRID "\"I64d\"") 93 endif(HAVE__FSEEKI64 AND HAVE__FTELLI64) 94 endif(SIZEOF___INT64 GREATER 7) 95 endif(NOT LFS_OFF_T) 96 97 set(CMAKE_REQUIRED_DEFINITIONS "${SAFE_CMAKE_REQUIRED_DEFINITIONS}") 98 endif(${_isenable}) 99 100 if(NOT LFS_OFF_T) 101 ## not found 102 set(LFS_OFF_T "long") 103 set(LFS_FOPEN "fopen") 104 set(LFS_FSEEK "fseek") 105 set(LFS_FTELL "ftell") 106 set(LFS_PRID "\"ld\"") 107 endif(NOT LFS_OFF_T) 108 109 endmacro(check_lfs) 110
