interpretor/libsndfile-1.0.25/M4/extra_largefile.m4

   1 dnl By default, many hosts won't let programs access large files;
   2 dnl one must use special compiler options to get large-file access to work.
   3 dnl For more details about this brain damage please see:
   4 dnl http://www.sas.com/standards/large.file/x_open.20Mar96.html
   5
   6 dnl Written by Paul Eggert <eggert@twinsun.com>.
   7
   8 dnl Internal subroutine of AC_SYS_EXTRA_LARGEFILE.
   9 dnl MN_SYS_EXTRA_LARGEFILE_FLAGS(FLAGSNAME)
  10 AC_DEFUN([MN_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.
  18 changequote(, )dnl
  19            irix6.[2-9]* | irix6.1[0-9]* | irix[7-9].* | irix[1-9][0-9]*)
  20 changequote([, ])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
  31 dnl Internal subroutine of AC_SYS_EXTRA_LARGEFILE.
  32 dnl AC_SYS_EXTRA_LARGEFILE_SPACE_APPEND(VAR, VAL)
  33 AC_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
  43 dnl Internal subroutine of AC_SYS_EXTRA_LARGEFILE.
  44 dnl AC_SYS_EXTRA_LARGEFILE_MACRO_VALUE(C-MACRO, CACHE-VAR, COMMENT, CODE-TO-SET-DEFAULT)
  45 AC_DEFUN([AC_SYS_EXTRA_LARGEFILE_MACRO_VALUE],
  46   [AC_CACHE_CHECK([for $1], $2,
  47      [$2=no
  48 changequote(, )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
  58 changequote([, ])dnl
  59       ])
  60    if test "[$]$2" != no; then
  61      AC_DEFINE_UNQUOTED([$1], [$]$2, [$3])
  62    fi])
  63
  64 AC_DEFUN([AC_SYS_EXTRA_LARGEFILE],
  65   [AC_REQUIRE([AC_CANONICAL_HOST])
  66    AC_ARG_ENABLE(largefile,
  67      [  --disable-largefile     omit support for large files])
  68    if test "$enable_largefile" != no; then
  69      AC_CHECK_TOOL(GETCONF, getconf)
  70      MN_SYS_EXTRA_LARGEFILE_FLAGS(CFLAGS)
  71      MN_SYS_EXTRA_LARGEFILE_FLAGS(LDFLAGS)
  72      MN_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