1dnl By default, many hosts won't let programs access large files; 2dnl one must use special compiler options to get large-file access to work. 3dnl For more details about this brain damage please see: 4dnl http://www.sas.com/standards/large.file/x_open.20Mar96.html 5 6dnl Written by Paul Eggert <eggert@twinsun.com>. 7 8dnl Internal subroutine of AC_SYS_EXTRA_LARGEFILE. 9dnl AC_SYS_EXTRA_LARGEFILE_FLAGS(FLAGSNAME) 10AC_DEFUN([AC_SYS_EXTRA_LARGEFILE_FLAGS], 11 [AC_CACHE_CHECK([for $1 value to request large file support], 12 ac_cv_sys_largefile_$1, 13 [ac_cv_sys_largefile_$1=`($GETCONF LFS_$1) 2>/dev/null` || { 14 ac_cv_sys_largefile_$1=no 15 ifelse($1, CFLAGS, 16 [case "$host_os" in 17 # IRIX 6.2 and later require cc -n32. 18changequote(, )dnl 19 irix6.[2-9]* | irix6.1[0-9]* | irix[7-9].* | irix[1-9][0-9]*) 20changequote([, ])dnl 21 if test "$GCC" != yes; then 22 ac_cv_sys_largefile_CFLAGS=-n32 23 fi 24 ac_save_CC="$CC" 25 CC="$CC $ac_cv_sys_largefile_CFLAGS" 26 AC_TRY_LINK(, , , ac_cv_sys_largefile_CFLAGS=no) 27 CC="$ac_save_CC" 28 esac]) 29 }])]) 30 31dnl Internal subroutine of AC_SYS_EXTRA_LARGEFILE. 32dnl AC_SYS_EXTRA_LARGEFILE_SPACE_APPEND(VAR, VAL) 33AC_DEFUN([AC_SYS_EXTRA_LARGEFILE_SPACE_APPEND], 34 [case $2 in 35 no) ;; 36 ?*) 37 case "[$]$1" in 38 '') $1=$2 ;; 39 *) $1=[$]$1' '$2 ;; 40 esac ;; 41 esac]) 42 43dnl Internal subroutine of AC_SYS_EXTRA_LARGEFILE. 44dnl AC_SYS_EXTRA_LARGEFILE_MACRO_VALUE(C-MACRO, CACHE-VAR, COMMENT, CODE-TO-SET-DEFAULT) 45AC_DEFUN([AC_SYS_EXTRA_LARGEFILE_MACRO_VALUE], 46 [AC_CACHE_CHECK([for $1], $2, 47 [$2=no 48changequote(, )dnl 49 $4 50 for ac_flag in $ac_cv_sys_largefile_CFLAGS no; do 51 case "$ac_flag" in 52 -D$1) 53 $2=1 ;; 54 -D$1=*) 55 $2=`expr " $ac_flag" : '[^=]*=\(.*\)'` ;; 56 esac 57 done 58changequote([, ])dnl 59 ]) 60 if test "[$]$2" != no; then 61 AC_DEFINE_UNQUOTED([$1], [$]$2, [$3]) 62 fi]) 63 64AC_DEFUN([AC_SYS_EXTRA_LARGEFILE], 65 [AC_REQUIRE([AC_CANONICAL_HOST]) 66 AC_ARG_ENABLE(largefile, 67 [ --disable-largefile omit support for large files]) 68 if test "$enable_largefile" != no; then 69 AC_CHECK_TOOL(GETCONF, getconf) 70 AC_SYS_EXTRA_LARGEFILE_FLAGS(CFLAGS) 71 AC_SYS_EXTRA_LARGEFILE_FLAGS(LDFLAGS) 72 AC_SYS_EXTRA_LARGEFILE_FLAGS(LIBS) 73 74 for ac_flag in $ac_cv_sys_largefile_CFLAGS no; do 75 case "$ac_flag" in 76 no) ;; 77 -D_FILE_OFFSET_BITS=*) ;; 78 -D_LARGEFILE_SOURCE | -D_LARGEFILE_SOURCE=*) ;; 79 -D_LARGE_FILES | -D_LARGE_FILES=*) ;; 80 -D?* | -I?*) 81 AC_SYS_EXTRA_LARGEFILE_SPACE_APPEND(CPPFLAGS, "$ac_flag") ;; 82 *) 83 AC_SYS_EXTRA_LARGEFILE_SPACE_APPEND(CFLAGS, "$ac_flag") ;; 84 esac 85 done 86 AC_SYS_EXTRA_LARGEFILE_SPACE_APPEND(LDFLAGS, "$ac_cv_sys_largefile_LDFLAGS") 87 AC_SYS_EXTRA_LARGEFILE_SPACE_APPEND(LIBS, "$ac_cv_sys_largefile_LIBS") 88 AC_SYS_EXTRA_LARGEFILE_MACRO_VALUE(_FILE_OFFSET_BITS, 89 ac_cv_sys_file_offset_bits, 90 [Number of bits in a file offset, on hosts where this is settable.]) 91 [case "$host_os" in 92 # HP-UX 10.20 and later 93 hpux10.[2-9][0-9]* | hpux1[1-9]* | hpux[2-9][0-9]*) 94 ac_cv_sys_file_offset_bits=64 ;; 95 esac] 96 AC_SYS_EXTRA_LARGEFILE_MACRO_VALUE(_LARGEFILE_SOURCE, 97 ac_cv_sys_largefile_source, 98 [Define to make fseeko etc. visible, on some hosts.], 99 [case "$host_os" in 100 # HP-UX 10.20 and later 101 hpux10.[2-9][0-9]* | hpux1[1-9]* | hpux[2-9][0-9]*) 102 ac_cv_sys_largefile_source=1 ;; 103 esac]) 104 AC_SYS_EXTRA_LARGEFILE_MACRO_VALUE(_LARGE_FILES, 105 ac_cv_sys_large_files, 106 [Define for large files, on AIX-style hosts.], 107 [case "$host_os" in 108 # AIX 4.2 and later 109 aix4.[2-9]* | aix4.1[0-9]* | aix[5-9].* | aix[1-9][0-9]*) 110 ac_cv_sys_large_files=1 ;; 111 esac]) 112 fi 113 ]) 114 115