+# Check whether --enable-largefile or --disable-largefile was given.
+if test "${enable_largefile+set}" = set; then
+ enableval="$enable_largefile"
+
+fi;
+if test "$enable_largefile" != no; then
+
+ echo "$as_me:11983: checking for special C compiler options needed for large files" >&5
+echo $ECHO_N "checking for special C compiler options needed for large files... $ECHO_C" >&6
+if test "${ac_cv_sys_largefile_CC+set}" = set; then
+ echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+ ac_cv_sys_largefile_CC=no
+ if test "$GCC" != yes; then
+ ac_save_CC=$CC
+ while :; do
+ # IRIX 6.2 and later do not support large files by default,
+ # so use the C compiler's -n32 option if that helps.
+ cat >conftest.$ac_ext <<_ACEOF
+#line 11995 "configure"
+#include "confdefs.h"
+#include <sys/types.h>
+ /* Check that off_t can represent 2**63 - 1 correctly.
+ We can't simply define LARGE_OFF_T to be 9223372036854775807,
+ since some C++ compilers masquerading as C compilers
+ incorrectly reject 9223372036854775807. */
+#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
+ int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
+ && LARGE_OFF_T % 2147483647 == 1)
+ ? 1 : -1];
+int
+main (void)
+{
+
+ ;
+ return 0;
+}
+_ACEOF
+ rm -f conftest.$ac_objext
+if { (eval echo "$as_me:12015: \"$ac_compile\"") >&5
+ (eval $ac_compile) 2>&5
+ ac_status=$?
+ echo "$as_me:12018: \$? = $ac_status" >&5
+ (exit $ac_status); } &&
+ { ac_try='test -s conftest.$ac_objext'
+ { (eval echo "$as_me:12021: \"$ac_try\"") >&5
+ (eval $ac_try) 2>&5
+ ac_status=$?
+ echo "$as_me:12024: \$? = $ac_status" >&5
+ (exit $ac_status); }; }; then
+ break
+else
+ echo "$as_me: failed program was:" >&5
+cat conftest.$ac_ext >&5
+fi
+rm -f conftest.$ac_objext
+ CC="$CC -n32"
+ rm -f conftest.$ac_objext
+if { (eval echo "$as_me:12034: \"$ac_compile\"") >&5
+ (eval $ac_compile) 2>&5
+ ac_status=$?
+ echo "$as_me:12037: \$? = $ac_status" >&5
+ (exit $ac_status); } &&
+ { ac_try='test -s conftest.$ac_objext'
+ { (eval echo "$as_me:12040: \"$ac_try\"") >&5
+ (eval $ac_try) 2>&5
+ ac_status=$?
+ echo "$as_me:12043: \$? = $ac_status" >&5
+ (exit $ac_status); }; }; then
+ ac_cv_sys_largefile_CC=' -n32'; break
+else
+ echo "$as_me: failed program was:" >&5
+cat conftest.$ac_ext >&5
+fi
+rm -f conftest.$ac_objext
+ break
+ done
+ CC=$ac_save_CC
+ rm -f conftest.$ac_ext
+ fi
+fi
+echo "$as_me:12057: result: $ac_cv_sys_largefile_CC" >&5
+echo "${ECHO_T}$ac_cv_sys_largefile_CC" >&6
+ if test "$ac_cv_sys_largefile_CC" != no; then
+ CC=$CC$ac_cv_sys_largefile_CC
+ fi
+
+ echo "$as_me:12063: checking for _FILE_OFFSET_BITS value needed for large files" >&5
+echo $ECHO_N "checking for _FILE_OFFSET_BITS value needed for large files... $ECHO_C" >&6
+if test "${ac_cv_sys_file_offset_bits+set}" = set; then
+ echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+ while :; do
+ ac_cv_sys_file_offset_bits=no
+ cat >conftest.$ac_ext <<_ACEOF
+#line 12071 "configure"
+#include "confdefs.h"
+#include <sys/types.h>
+ /* Check that off_t can represent 2**63 - 1 correctly.
+ We can't simply define LARGE_OFF_T to be 9223372036854775807,
+ since some C++ compilers masquerading as C compilers
+ incorrectly reject 9223372036854775807. */
+#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
+ int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
+ && LARGE_OFF_T % 2147483647 == 1)
+ ? 1 : -1];
+int
+main (void)
+{
+
+ ;
+ return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:12091: \"$ac_compile\"") >&5
+ (eval $ac_compile) 2>&5
+ ac_status=$?
+ echo "$as_me:12094: \$? = $ac_status" >&5
+ (exit $ac_status); } &&
+ { ac_try='test -s conftest.$ac_objext'
+ { (eval echo "$as_me:12097: \"$ac_try\"") >&5
+ (eval $ac_try) 2>&5
+ ac_status=$?
+ echo "$as_me:12100: \$? = $ac_status" >&5
+ (exit $ac_status); }; }; then
+ break
+else
+ echo "$as_me: failed program was:" >&5
+cat conftest.$ac_ext >&5
+fi
+rm -f conftest.$ac_objext conftest.$ac_ext
+ cat >conftest.$ac_ext <<_ACEOF
+#line 12109 "configure"
+#include "confdefs.h"
+#define _FILE_OFFSET_BITS 64
+#include <sys/types.h>
+ /* Check that off_t can represent 2**63 - 1 correctly.
+ We can't simply define LARGE_OFF_T to be 9223372036854775807,
+ since some C++ compilers masquerading as C compilers
+ incorrectly reject 9223372036854775807. */
+#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
+ int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
+ && LARGE_OFF_T % 2147483647 == 1)
+ ? 1 : -1];
+int
+main (void)
+{
+
+ ;
+ return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:12130: \"$ac_compile\"") >&5
+ (eval $ac_compile) 2>&5
+ ac_status=$?
+ echo "$as_me:12133: \$? = $ac_status" >&5
+ (exit $ac_status); } &&
+ { ac_try='test -s conftest.$ac_objext'
+ { (eval echo "$as_me:12136: \"$ac_try\"") >&5
+ (eval $ac_try) 2>&5
+ ac_status=$?
+ echo "$as_me:12139: \$? = $ac_status" >&5
+ (exit $ac_status); }; }; then
+ ac_cv_sys_file_offset_bits=64; break
+else
+ echo "$as_me: failed program was:" >&5
+cat conftest.$ac_ext >&5
+fi
+rm -f conftest.$ac_objext conftest.$ac_ext
+ break
+done
+fi
+echo "$as_me:12150: result: $ac_cv_sys_file_offset_bits" >&5
+echo "${ECHO_T}$ac_cv_sys_file_offset_bits" >&6
+if test "$ac_cv_sys_file_offset_bits" != no; then
+
+cat >>confdefs.h <<EOF
+#define _FILE_OFFSET_BITS $ac_cv_sys_file_offset_bits
+EOF
+
+fi
+rm -rf conftest*
+ echo "$as_me:12160: checking for _LARGE_FILES value needed for large files" >&5
+echo $ECHO_N "checking for _LARGE_FILES value needed for large files... $ECHO_C" >&6
+if test "${ac_cv_sys_large_files+set}" = set; then
+ echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+ while :; do
+ ac_cv_sys_large_files=no
+ cat >conftest.$ac_ext <<_ACEOF
+#line 12168 "configure"
+#include "confdefs.h"
+#include <sys/types.h>
+ /* Check that off_t can represent 2**63 - 1 correctly.
+ We can't simply define LARGE_OFF_T to be 9223372036854775807,
+ since some C++ compilers masquerading as C compilers
+ incorrectly reject 9223372036854775807. */
+#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
+ int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
+ && LARGE_OFF_T % 2147483647 == 1)
+ ? 1 : -1];
+int
+main (void)
+{
+
+ ;
+ return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:12188: \"$ac_compile\"") >&5
+ (eval $ac_compile) 2>&5
+ ac_status=$?
+ echo "$as_me:12191: \$? = $ac_status" >&5
+ (exit $ac_status); } &&
+ { ac_try='test -s conftest.$ac_objext'
+ { (eval echo "$as_me:12194: \"$ac_try\"") >&5
+ (eval $ac_try) 2>&5
+ ac_status=$?
+ echo "$as_me:12197: \$? = $ac_status" >&5
+ (exit $ac_status); }; }; then
+ break
+else
+ echo "$as_me: failed program was:" >&5
+cat conftest.$ac_ext >&5
+fi
+rm -f conftest.$ac_objext conftest.$ac_ext
+ cat >conftest.$ac_ext <<_ACEOF
+#line 12206 "configure"
+#include "confdefs.h"
+#define _LARGE_FILES 1
+#include <sys/types.h>
+ /* Check that off_t can represent 2**63 - 1 correctly.
+ We can't simply define LARGE_OFF_T to be 9223372036854775807,
+ since some C++ compilers masquerading as C compilers
+ incorrectly reject 9223372036854775807. */
+#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
+ int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
+ && LARGE_OFF_T % 2147483647 == 1)
+ ? 1 : -1];
+int
+main (void)
+{
+
+ ;
+ return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:12227: \"$ac_compile\"") >&5
+ (eval $ac_compile) 2>&5
+ ac_status=$?
+ echo "$as_me:12230: \$? = $ac_status" >&5
+ (exit $ac_status); } &&
+ { ac_try='test -s conftest.$ac_objext'
+ { (eval echo "$as_me:12233: \"$ac_try\"") >&5
+ (eval $ac_try) 2>&5
+ ac_status=$?
+ echo "$as_me:12236: \$? = $ac_status" >&5
+ (exit $ac_status); }; }; then
+ ac_cv_sys_large_files=1; break
+else
+ echo "$as_me: failed program was:" >&5
+cat conftest.$ac_ext >&5
+fi
+rm -f conftest.$ac_objext conftest.$ac_ext
+ break
+done
+fi
+echo "$as_me:12247: result: $ac_cv_sys_large_files" >&5
+echo "${ECHO_T}$ac_cv_sys_large_files" >&6
+if test "$ac_cv_sys_large_files" != no; then
+
+cat >>confdefs.h <<EOF
+#define _LARGE_FILES $ac_cv_sys_large_files
+EOF
+
+fi
+rm -rf conftest*
+fi
+
+ if test "$enable_largefile" != no ; then
+ echo "$as_me:12260: checking for _LARGEFILE_SOURCE value needed for large files" >&5
+echo $ECHO_N "checking for _LARGEFILE_SOURCE value needed for large files... $ECHO_C" >&6
+if test "${ac_cv_sys_largefile_source+set}" = set; then
+ echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+ while :; do
+ ac_cv_sys_largefile_source=no
+ cat >conftest.$ac_ext <<_ACEOF
+#line 12268 "configure"
+#include "confdefs.h"
+#include <stdio.h>
+int
+main (void)
+{
+return !fseeko;
+ ;
+ return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:12280: \"$ac_compile\"") >&5
+ (eval $ac_compile) 2>&5
+ ac_status=$?
+ echo "$as_me:12283: \$? = $ac_status" >&5
+ (exit $ac_status); } &&
+ { ac_try='test -s conftest.$ac_objext'
+ { (eval echo "$as_me:12286: \"$ac_try\"") >&5
+ (eval $ac_try) 2>&5
+ ac_status=$?
+ echo "$as_me:12289: \$? = $ac_status" >&5
+ (exit $ac_status); }; }; then
+ break
+else
+ echo "$as_me: failed program was:" >&5
+cat conftest.$ac_ext >&5
+fi
+rm -f conftest.$ac_objext conftest.$ac_ext
+ cat >conftest.$ac_ext <<_ACEOF
+#line 12298 "configure"
+#include "confdefs.h"
+#define _LARGEFILE_SOURCE 1
+#include <stdio.h>
+int
+main (void)
+{
+return !fseeko;
+ ;
+ return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:12311: \"$ac_compile\"") >&5
+ (eval $ac_compile) 2>&5
+ ac_status=$?
+ echo "$as_me:12314: \$? = $ac_status" >&5
+ (exit $ac_status); } &&
+ { ac_try='test -s conftest.$ac_objext'
+ { (eval echo "$as_me:12317: \"$ac_try\"") >&5
+ (eval $ac_try) 2>&5
+ ac_status=$?
+ echo "$as_me:12320: \$? = $ac_status" >&5
+ (exit $ac_status); }; }; then
+ ac_cv_sys_largefile_source=1; break
+else
+ echo "$as_me: failed program was:" >&5
+cat conftest.$ac_ext >&5
+fi
+rm -f conftest.$ac_objext conftest.$ac_ext
+ break
+done
+fi
+echo "$as_me:12331: result: $ac_cv_sys_largefile_source" >&5
+echo "${ECHO_T}$ac_cv_sys_largefile_source" >&6
+if test "$ac_cv_sys_largefile_source" != no; then
+
+cat >>confdefs.h <<EOF
+#define _LARGEFILE_SOURCE $ac_cv_sys_largefile_source
+EOF
+
+fi
+rm -rf conftest*
+
+# We used to try defining _XOPEN_SOURCE=500 too, to work around a bug
+# in glibc 2.1.3, but that breaks too many other things.
+# If you want fseeko and ftello with glibc, upgrade to a fixed glibc.
+echo "$as_me:12345: checking for fseeko" >&5
+echo $ECHO_N "checking for fseeko... $ECHO_C" >&6
+if test "${ac_cv_func_fseeko+set}" = set; then
+ echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+ cat >conftest.$ac_ext <<_ACEOF
+#line 12351 "configure"
+#include "confdefs.h"
+#include <stdio.h>
+int
+main (void)
+{
+return fseeko && fseeko (stdin, 0, 0);
+ ;
+ return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext conftest$ac_exeext
+if { (eval echo "$as_me:12363: \"$ac_link\"") >&5
+ (eval $ac_link) 2>&5
+ ac_status=$?
+ echo "$as_me:12366: \$? = $ac_status" >&5
+ (exit $ac_status); } &&
+ { ac_try='test -s conftest$ac_exeext'
+ { (eval echo "$as_me:12369: \"$ac_try\"") >&5
+ (eval $ac_try) 2>&5
+ ac_status=$?
+ echo "$as_me:12372: \$? = $ac_status" >&5
+ (exit $ac_status); }; }; then
+ ac_cv_func_fseeko=yes
+else
+ echo "$as_me: failed program was:" >&5
+cat conftest.$ac_ext >&5
+ac_cv_func_fseeko=no
+fi
+rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
+fi
+echo "$as_me:12382: result: $ac_cv_func_fseeko" >&5
+echo "${ECHO_T}$ac_cv_func_fseeko" >&6
+if test $ac_cv_func_fseeko = yes; then
+
+cat >>confdefs.h <<\EOF
+#define HAVE_FSEEKO 1
+EOF
+
+fi
+
+ # Normally we would collect these definitions in the config.h,
+ # but (like _XOPEN_SOURCE), some environments rely on having these
+ # defined before any of the system headers are included. Another
+ # case comes up with C++, e.g., on AIX the compiler compiles the
+ # header files by themselves before looking at the body files it is
+ # told to compile. For ncurses, those header files do not include
+ # the config.h
+ if test "$ac_cv_sys_large_files" != no
+ then
+
+ test -n "$CPPFLAGS" && CPPFLAGS="$CPPFLAGS "
+ CPPFLAGS="${CPPFLAGS}-D_LARGE_FILES"
+
+ fi
+ if test "$ac_cv_sys_largefile_source" != no
+ then
+
+ test -n "$CPPFLAGS" && CPPFLAGS="$CPPFLAGS "
+ CPPFLAGS="${CPPFLAGS}-D_LARGEFILE_SOURCE"
+
+ fi
+ if test "$ac_cv_sys_file_offset_bits" != no
+ then
+
+ test -n "$CPPFLAGS" && CPPFLAGS="$CPPFLAGS "
+ CPPFLAGS="${CPPFLAGS}-D_FILE_OFFSET_BITS=$ac_cv_sys_file_offset_bits"
+
+ fi
+
+ echo "$as_me:12421: checking whether to use struct dirent64" >&5
+echo $ECHO_N "checking whether to use struct dirent64... $ECHO_C" >&6
+if test "${cf_cv_struct_dirent64+set}" = set; then
+ echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+
+ cat >conftest.$ac_ext <<_ACEOF
+#line 12428 "configure"
+#include "confdefs.h"
+
+#pragma GCC diagnostic error "-Wincompatible-pointer-types"
+#include <sys/types.h>
+#include <dirent.h>
+
+int
+main (void)
+{
+
+ /* if transitional largefile support is setup, this is true */
+ extern struct dirent64 * readdir(DIR *);
+ struct dirent64 *x = readdir((DIR *)0);
+ struct dirent *y = readdir((DIR *)0);
+ int z = x - y;
+
+ ;
+ return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:12450: \"$ac_compile\"") >&5
+ (eval $ac_compile) 2>&5
+ ac_status=$?
+ echo "$as_me:12453: \$? = $ac_status" >&5
+ (exit $ac_status); } &&
+ { ac_try='test -s conftest.$ac_objext'
+ { (eval echo "$as_me:12456: \"$ac_try\"") >&5
+ (eval $ac_try) 2>&5
+ ac_status=$?
+ echo "$as_me:12459: \$? = $ac_status" >&5
+ (exit $ac_status); }; }; then
+ cf_cv_struct_dirent64=yes
+else
+ echo "$as_me: failed program was:" >&5
+cat conftest.$ac_ext >&5
+cf_cv_struct_dirent64=no
+fi
+rm -f conftest.$ac_objext conftest.$ac_ext
+
+fi
+echo "$as_me:12470: result: $cf_cv_struct_dirent64" >&5
+echo "${ECHO_T}$cf_cv_struct_dirent64" >&6
+ test "$cf_cv_struct_dirent64" = yes &&
+cat >>confdefs.h <<\EOF
+#define HAVE_STRUCT_DIRENT64 1
+EOF
+