| 1 | #serial 6
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| 2 |
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| 3 | dnl By default, many hosts won't let programs access large files;
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| 4 | dnl one must use special compiler options to get large-file access to work.
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| 5 | dnl For more details about this brain damage please see:
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| 6 | dnl http://www.sas.com/standards/large.file/x_open.20Mar96.html
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| 7 |
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| 8 | dnl Written by Paul Eggert <eggert@twinsun.com>.
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| 9 |
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| 10 | dnl Internal subroutine of AC_SYS_LARGEFILE.
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| 11 | dnl AC_SYS_LARGEFILE_FLAGS(FLAGSNAME)
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| 12 | AC_DEFUN([AC_SYS_LARGEFILE_FLAGS],
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| 13 | [AC_CACHE_CHECK([for $1 value to request large file support],
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| 14 | ac_cv_sys_largefile_$1,
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| 15 | [if ($GETCONF LFS_$1) >conftest.1 2>conftest.2 && test ! -s conftest.2
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| 16 | then
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| 17 | ac_cv_sys_largefile_$1=`cat conftest.1`
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| 18 | else
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| 19 | ac_cv_sys_largefile_$1=no
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| 20 | ifelse($1, CFLAGS,
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| 21 | [case "$host_os" in
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| 22 | # HP-UX 10.20 requires -D__STDC_EXT__ with gcc 2.95.1.
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| 23 | changequote(, )dnl
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| 24 | hpux10.[2-9][0-9]* | hpux1[1-9]* | hpux[2-9][0-9]*)
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| 25 | changequote([, ])dnl
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| 26 | if test "$GCC" = yes; then
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| 27 | ac_cv_sys_largefile_CFLAGS=-D__STDC_EXT__
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| 28 | fi
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| 29 | ;;
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| 30 | # IRIX 6.2 and later require cc -n32.
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| 31 | changequote(, )dnl
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| 32 | irix6.[2-9]* | irix6.1[0-9]* | irix[7-9].* | irix[1-9][0-9]*)
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| 33 | changequote([, ])dnl
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| 34 | if test "$GCC" != yes; then
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| 35 | ac_cv_sys_largefile_CFLAGS=-n32
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| 36 | fi
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| 37 | esac
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| 38 | if test "$ac_cv_sys_largefile_CFLAGS" != no; then
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| 39 | ac_save_CC="$CC"
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| 40 | CC="$CC $ac_cv_sys_largefile_CFLAGS"
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| 41 | AC_TRY_LINK(, , , ac_cv_sys_largefile_CFLAGS=no)
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| 42 | CC="$ac_save_CC"
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| 43 | fi])
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| 44 | fi
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| 45 | rm -f conftest*])])
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| 46 |
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| 47 | dnl Internal subroutine of AC_SYS_LARGEFILE.
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| 48 | dnl AC_SYS_LARGEFILE_SPACE_APPEND(VAR, VAL)
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| 49 | AC_DEFUN([AC_SYS_LARGEFILE_SPACE_APPEND],
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| 50 | [case $2 in
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| 51 | no) ;;
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| 52 | ?*)
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| 53 | case "[$]$1" in
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| 54 | '') $1=$2 ;;
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| 55 | *) $1=[$]$1' '$2 ;;
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| 56 | esac ;;
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| 57 | esac])
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| 58 |
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| 59 | dnl Internal subroutine of AC_SYS_LARGEFILE.
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| 60 | dnl AC_SYS_LARGEFILE_MACRO_VALUE(C-MACRO, CACHE-VAR, COMMENT, CODE-TO-SET-DEFAULT)
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| 61 | AC_DEFUN([AC_SYS_LARGEFILE_MACRO_VALUE],
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| 62 | [AC_CACHE_CHECK([for $1], $2,
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| 63 | [$2=no
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| 64 | changequote(, )dnl
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| 65 | $4
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| 66 | for ac_flag in $ac_cv_sys_largefile_CFLAGS no; do
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| 67 | case "$ac_flag" in
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| 68 | -D$1)
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| 69 | $2=1 ;;
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| 70 | -D$1=*)
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| 71 | $2=`expr " $ac_flag" : '[^=]*=\(.*\)'` ;;
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| 72 | esac
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| 73 | done
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| 74 | changequote([, ])dnl
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| 75 | ])
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| 76 | if test "[$]$2" != no; then
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| 77 | AC_DEFINE_UNQUOTED([$1], [$]$2, [$3])
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| 78 | fi])
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| 79 |
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| 80 | AC_DEFUN([AC_SYS_LARGEFILE],
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| 81 | [AC_REQUIRE([AC_CANONICAL_HOST])
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| 82 | AC_ARG_ENABLE(largefile,
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| 83 | [ --disable-largefile omit support for large files])
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| 84 | if test "$enable_largefile" != no; then
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| 85 | AC_CHECK_TOOL(GETCONF, getconf)
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| 86 | AC_SYS_LARGEFILE_FLAGS(CFLAGS)
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| 87 | AC_SYS_LARGEFILE_FLAGS(LDFLAGS)
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| 88 | AC_SYS_LARGEFILE_FLAGS(LIBS)
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| 89 |
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| 90 | for ac_flag in $ac_cv_sys_largefile_CFLAGS no; do
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| 91 | case "$ac_flag" in
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| 92 | no) ;;
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| 93 | -D_FILE_OFFSET_BITS=*) ;;
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| 94 | -D_LARGEFILE_SOURCE | -D_LARGEFILE_SOURCE=*) ;;
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| 95 | -D_LARGE_FILES | -D_LARGE_FILES=*) ;;
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| 96 | -D?* | -I?*)
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| 97 | AC_SYS_LARGEFILE_SPACE_APPEND(CPPFLAGS, "$ac_flag") ;;
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| 98 | *)
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| 99 | AC_SYS_LARGEFILE_SPACE_APPEND(CFLAGS, "$ac_flag") ;;
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| 100 | esac
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| 101 | done
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| 102 | AC_SYS_LARGEFILE_SPACE_APPEND(LDFLAGS, "$ac_cv_sys_largefile_LDFLAGS")
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| 103 | AC_SYS_LARGEFILE_SPACE_APPEND(LIBS, "$ac_cv_sys_largefile_LIBS")
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| 104 | AC_SYS_LARGEFILE_MACRO_VALUE(_FILE_OFFSET_BITS,
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| 105 | ac_cv_sys_file_offset_bits,
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| 106 | [Number of bits in a file offset, on hosts where this is settable.],
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| 107 | [case "$host_os" in
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| 108 | # HP-UX 10.20 and later
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| 109 | hpux10.[2-9][0-9]* | hpux1[1-9]* | hpux[2-9][0-9]*)
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| 110 | ac_cv_sys_file_offset_bits=64 ;;
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| 111 | esac])
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| 112 | AC_SYS_LARGEFILE_MACRO_VALUE(_LARGEFILE_SOURCE,
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| 113 | ac_cv_sys_largefile_source,
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| 114 | [Define to make fseeko etc. visible, on some hosts.],
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| 115 | [case "$host_os" in
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| 116 | # HP-UX 10.20 and later
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| 117 | hpux10.[2-9][0-9]* | hpux1[1-9]* | hpux[2-9][0-9]*)
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| 118 | ac_cv_sys_largefile_source=1 ;;
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| 119 | esac])
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| 120 | AC_SYS_LARGEFILE_MACRO_VALUE(_LARGE_FILES,
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| 121 | ac_cv_sys_large_files,
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| 122 | [Define for large files, on AIX-style hosts.],
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| 123 | [case "$host_os" in
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| 124 | # AIX 4.2 and later
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| 125 | aix4.[2-9]* | aix4.1[0-9]* | aix[5-9].* | aix[1-9][0-9]*)
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| 126 | ac_cv_sys_large_files=1 ;;
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| 127 | esac])
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| 128 | fi
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| 129 | ])
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