-dnl If available, use support for large files unless the user specified
-dnl one of the CPPFLAGS, LDFLAGS, or LIBS variables (<eggert@twinsun.com>
-dnl via GNU patch 2.5)
-dnl
-AC_DEFUN(LARGE_FILE_SUPPORT,
-[AC_MSG_CHECKING(whether large file support needs explicit enabling)
-ac_getconfs=''
-ac_result=yes
-ac_set=''
-ac_shellvars='CPPFLAGS LDFLAGS LIBS'
-for ac_shellvar in $ac_shellvars; do
- case $ac_shellvar in
- CPPFLAGS) ac_lfsvar=LFS_CFLAGS ac_lfs64var=LFS64_CFLAGS ;;
- *) ac_lfsvar=LFS_$ac_shellvar ac_lfs64var=LFS64_$ac_shellvar ;;
- esac
- eval test '"${'$ac_shellvar'+set}"' = set && ac_set=$ac_shellvar
- (getconf $ac_lfsvar) >/dev/null 2>&1 || { ac_result=no; break; }
- ac_getconf=`getconf $ac_lfsvar`
- ac_getconf64=`getconf $ac_lfs64var`
- ac_getconfs=$ac_getconfs$ac_getconf\ $ac_getconf64
- eval ac_test_$ac_shellvar="\$ac_getconf\ \$ac_getconf64"
-done
-case "$ac_result$ac_getconfs" in
-yes) ac_result=no ;;
-esac
-case "$ac_result$ac_set" in
-yes?*) ac_result="yes, but $ac_set is already set, so use its settings"
-esac
-AC_MSG_RESULT($ac_result)
-case $ac_result in
-yes)
- for ac_shellvar in $ac_shellvars; do
- eval $ac_shellvar=\$ac_test_$ac_shellvar
- done ;;
-esac
-])
+dnl ========= Large File Support ==============
+dnl By default, many hosts won't let programs access large files;
+dnl one must use special compiler options to get large-file access to work.
+dnl For more details about this brain damage please see:
+dnl http://www.sas.com/standards/large.file/x_open.20Mar96.html
+
+dnl Written by Paul Eggert <eggert@twinsun.com>.
+
+dnl Internal subroutine of AC_SYS_LARGEFILE.
+dnl AC_SYS_LARGEFILE_FLAGS(FLAGSNAME)
+AC_DEFUN(AC_SYS_LARGEFILE_FLAGS,
+ [AC_CACHE_CHECK([for $1 value to request large file support],
+ ac_cv_sys_largefile_$1,
+ [ac_cv_sys_largefile_$1=`($GETCONF LFS_$1) 2>/dev/null` || {
+ ac_cv_sys_largefile_$1=no
+ ifelse($1, CFLAGS,
+ [case "$host_os" in
+ # IRIX 6.2 and later require cc -n32.
+changequote(, )dnl
+ irix6.[2-9]* | irix6.1[0-9]* | irix[7-9].* | irix[1-9][0-9]*)
+changequote([, ])dnl
+ if test "$GCC" != yes; then
+ ac_cv_sys_largefile_CFLAGS=-n32
+ fi
+ ac_save_CC="$CC"
+ CC="$CC $ac_cv_sys_largefile_CFLAGS"
+ AC_TRY_LINK(, , , ac_cv_sys_largefile_CFLAGS=no)
+ CC="$ac_save_CC"
+ esac])
+ }])])
+
+dnl Internal subroutine of AC_SYS_LARGEFILE.
+dnl AC_SYS_LARGEFILE_SPACE_APPEND(VAR, VAL)
+AC_DEFUN(AC_SYS_LARGEFILE_SPACE_APPEND,
+ [case $2 in
+ no) ;;
+ ?*)
+ case "[$]$1" in
+ '') $1=$2 ;;
+ *) $1=[$]$1' '$2 ;;
+ esac ;;
+ esac])
+
+dnl Internal subroutine of AC_SYS_LARGEFILE.
+dnl AC_SYS_LARGEFILE_MACRO_VALUE(C-MACRO, CACHE-VAR, COMMENT, CODE-TO-SET-DEFAULT)
+AC_DEFUN(AC_SYS_LARGEFILE_MACRO_VALUE,
+ [AC_CACHE_CHECK([for $1], $2,
+ [$2=no
+changequote(, )dnl
+ $4
+ for ac_flag in $ac_cv_sys_largefile_CFLAGS no; do
+ case "$ac_flag" in
+ -D$1)
+ $2=1 ;;
+ -D$1=*)
+ $2=`expr " $ac_flag" : '[^=]*=\(.*\)'` ;;
+ esac
+ done
+changequote([, ])dnl
+ ])
+ if test "[$]$2" != no; then
+ AC_DEFINE_UNQUOTED([$1], [$]$2, [$3])
+ fi])
+
+AC_DEFUN(AC_BAC_LARGEFILE,
+ [AC_REQUIRE([AC_CANONICAL_HOST])
+ AC_ARG_ENABLE(largefile,
+ [ --disable-largefile omit support for large files])
+ if test "$enable_largefile" != no; then
+ AC_CHECK_TOOL(GETCONF, getconf)
+ AC_SYS_LARGEFILE_FLAGS(CFLAGS)
+ AC_SYS_LARGEFILE_FLAGS(LDFLAGS)
+ AC_SYS_LARGEFILE_FLAGS(LIBS)
+
+ for ac_flag in $ac_cv_sys_largefile_CFLAGS no; do
+ case "$ac_flag" in
+ no) ;;
+ -D_FILE_OFFSET_BITS=*) ;;
+ -D_LARGEFILE_SOURCE | -D_LARGEFILE_SOURCE=*) ;;
+ -D_LARGE_FILES | -D_LARGE_FILES=*) ;;
+ -D?* | -I?*)
+ AC_SYS_LARGEFILE_SPACE_APPEND(CPPFLAGS, "$ac_flag") ;;
+ *)
+ AC_SYS_LARGEFILE_SPACE_APPEND(CFLAGS, "$ac_flag") ;;
+ esac
+ done
+ AC_SYS_LARGEFILE_SPACE_APPEND(LDFLAGS, "$ac_cv_sys_largefile_LDFLAGS")
+ AC_SYS_LARGEFILE_SPACE_APPEND(LIBS, "$ac_cv_sys_largefile_LIBS")
+ AC_SYS_LARGEFILE_MACRO_VALUE(_FILE_OFFSET_BITS,
+ ac_cv_sys_file_offset_bits,
+ [Number of bits in a file offset, on hosts where this is settable.],
+ [case "$host_os" in
+ # HP-UX 10.20 and later
+ hpux10.[2-9][0-9]* | hpux1[1-9]* | hpux[2-9][0-9]*)
+ ac_cv_sys_file_offset_bits=64 ;;
+ esac])
+ AC_SYS_LARGEFILE_MACRO_VALUE(_LARGEFILE_SOURCE,
+ ac_cv_sys_largefile_source,
+ [Define to make fseeko etc. visible, on some hosts.],
+ [case "$host_os" in
+ # HP-UX 10.20 and later
+ hpux10.[2-9][0-9]* | hpux1[1-9]* | hpux[2-9][0-9]*)
+ ac_cv_sys_largefile_source=1 ;;
+ esac])
+ AC_SYS_LARGEFILE_MACRO_VALUE(_LARGE_FILES,
+ ac_cv_sys_large_files,
+ [Define for large files, on AIX-style hosts.],
+ [case "$host_os" in
+ # AIX 4.2 and later
+ aix4.[2-9]* | aix4.1[0-9]* | aix[5-9].* | aix[1-9][0-9]*)
+ ac_cv_sys_large_files=1 ;;
+ esac])
+ fi
+ ])
+dnl ==========================================================