[svn-r18710] Purpose:

    Improve configure's large-file support control.

Description:

    Modified configure to now attempt to add defines necessary for
    supporting largefiles on all systems, instead of solely on linux. This 
    is in response to user requests to enable largefile support on Solaris 
    by default, as well as to give extra control on AIX (instead of just 
    jamming the necessary flag into the config files).

    The old --enable-linux-lfs flag is being deprecated in favor of the
    --enable-largefile flag (enabled by default), which can be used on all
    platforms. --disable-linux-lfs can still be used to disable largefile
    support (on linux) when the --enable-largefile flag is not specified.

    On systems where large files cannot be supported in this manner,
    configure will report as such.

Tested:

    h5committest
    AIX (NCSA's blue_print machine)
    duty, liberty, and linew.

1 files changed, 352 insertions, 55 deletions

diff --git a/configure b/configure
index 2444031..f976e33 100755
--- a/configure
+++ b/configure
@@ -881,7 +881,7 @@ DIRECT_VFD
 HAVE_DMALLOC
 CODESTACK
 INSTRUMENT
-LINUX_LFS
+LARGEFILE
 GPFS
 HDF5_HL
 CXX
@@ -989,6 +989,7 @@ enable_libtool_lock
 enable_static_exec
 enable_sharedlib_rpath
 enable_production
+enable_largefile
 enable_linux_lfs
 with_fnord
 with_dmalloc
@@ -1670,8 +1671,10 @@ Optional Features:
   --disable-sharedlib-rpath
                           Disable use of the '=Wl,-rpath' linker option
   --enable-production     Determines how to run the compiler.
-  --enable-linux-lfs      Enable support for large (64-bit) files on Linux.
-                          [default=check]
+  --disable-largefile     omit support for large files
+  --disable-linux-lfs     Disable support for large (64-bit) files on Linux.
+                          This option is deprecated in favor of
+                          --disable-largefile.
   --enable-threadsafe     Enable thread safe capability
   --enable-gpfs           Enable GPFS hints for the MPI/POSIX file driver.
                           [default=no]
@@ -3931,7 +3934,7 @@ $as_echo "done" >&6; }
  HDF_CXX=no
  HDF5_HL=yes
  GPFS=no
- LINUX_LFS=no
+ LARGEFILE=yes
 
  CODESTACK=no
  HAVE_DMALLOC=no
@@ -8253,13 +8256,13 @@ if test "${lt_cv_nm_interface+set}" = set; then :
 else
   lt_cv_nm_interface="BSD nm"
   echo "int some_variable = 0;" > conftest.$ac_ext
-  (eval echo "\"\$as_me:8256: $ac_compile\"" >&5)
+  (eval echo "\"\$as_me:8259: $ac_compile\"" >&5)
   (eval "$ac_compile" 2>conftest.err)
   cat conftest.err >&5
-  (eval echo "\"\$as_me:8259: $NM \\\"conftest.$ac_objext\\\"\"" >&5)
+  (eval echo "\"\$as_me:8262: $NM \\\"conftest.$ac_objext\\\"\"" >&5)
   (eval "$NM \"conftest.$ac_objext\"" 2>conftest.err > conftest.out)
   cat conftest.err >&5
-  (eval echo "\"\$as_me:8262: output\"" >&5)
+  (eval echo "\"\$as_me:8265: output\"" >&5)
   cat conftest.out >&5
   if $GREP 'External.*some_variable' conftest.out > /dev/null; then
     lt_cv_nm_interface="MS dumpbin"
@@ -9464,7 +9467,7 @@ ia64-*-hpux*)
   ;;
 *-*-irix6*)
   # Find out which ABI we are using.
-  echo '#line 9467 "configure"' > conftest.$ac_ext
+  echo '#line 9470 "configure"' > conftest.$ac_ext
   if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
   (eval $ac_compile) 2>&5
   ac_status=$?
@@ -11784,11 +11787,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:11787: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:11790: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:11791: \$? = $ac_status" >&5
+   echo "$as_me:11794: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings other than the usual output.
@@ -12123,11 +12126,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:12126: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:12129: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:12130: \$? = $ac_status" >&5
+   echo "$as_me:12133: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings other than the usual output.
@@ -12228,11 +12231,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:12231: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:12234: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>out/conftest.err)
    ac_status=$?
    cat out/conftest.err >&5
-   echo "$as_me:12235: \$? = $ac_status" >&5
+   echo "$as_me:12238: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s out/conftest2.$ac_objext
    then
      # The compiler can only warn and ignore the option if not recognized
@@ -12283,11 +12286,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:12286: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:12289: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>out/conftest.err)
    ac_status=$?
    cat out/conftest.err >&5
-   echo "$as_me:12290: \$? = $ac_status" >&5
+   echo "$as_me:12293: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s out/conftest2.$ac_objext
    then
      # The compiler can only warn and ignore the option if not recognized
@@ -14714,7 +14717,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 14717 "configure"
+#line 14720 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -14810,7 +14813,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 14813 "configure"
+#line 14816 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -16782,11 +16785,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:16785: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:16788: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:16789: \$? = $ac_status" >&5
+   echo "$as_me:16792: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings other than the usual output.
@@ -16881,11 +16884,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:16884: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:16887: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>out/conftest.err)
    ac_status=$?
    cat out/conftest.err >&5
-   echo "$as_me:16888: \$? = $ac_status" >&5
+   echo "$as_me:16891: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s out/conftest2.$ac_objext
    then
      # The compiler can only warn and ignore the option if not recognized
@@ -16933,11 +16936,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:16936: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:16939: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>out/conftest.err)
    ac_status=$?
    cat out/conftest.err >&5
-   echo "$as_me:16940: \$? = $ac_status" >&5
+   echo "$as_me:16943: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s out/conftest2.$ac_objext
    then
      # The compiler can only warn and ignore the option if not recognized
@@ -18450,11 +18453,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:18453: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:18456: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:18457: \$? = $ac_status" >&5
+   echo "$as_me:18460: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings other than the usual output.
@@ -18549,11 +18552,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:18552: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:18555: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>out/conftest.err)
    ac_status=$?
    cat out/conftest.err >&5
-   echo "$as_me:18556: \$? = $ac_status" >&5
+   echo "$as_me:18559: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s out/conftest2.$ac_objext
    then
      # The compiler can only warn and ignore the option if not recognized
@@ -18601,11 +18604,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:18604: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:18607: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>out/conftest.err)
    ac_status=$?
    cat out/conftest.err >&5
-   echo "$as_me:18608: \$? = $ac_status" >&5
+   echo "$as_me:18611: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s out/conftest2.$ac_objext
    then
      # The compiler can only warn and ignore the option if not recognized
@@ -21184,40 +21187,333 @@ done
     ;;
 esac
 
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if configure should try to set up large file support" >&5
+$as_echo_n "checking if configure should try to set up large file support... " >&6; }
+
+# Check whether --enable-largefile was given.
+if test "${enable_largefile+set}" = set; then :
+  enableval=$enable_largefile;
+fi
+
+
 case "$host_cpu-$host_vendor-$host_os" in
   *linux*)
-                # Check whether --enable-linux-lfs was given.
+    # Check whether --enable-linux-lfs was given.
 if test "${enable_linux_lfs+set}" = set; then :
   enableval=$enable_linux_lfs;
 fi
 
 
-    LINUX_LFS="no"
-    case "X-$enable_linux_lfs" in
-      X-yes)
-        LINUX_LFS=yes
-        ;;
-      X-no)
-        ;;
-      X-|*)
-        MAJOR_VER="`uname -r | cut -d '.' -f1`"
-        MINOR_VER="`uname -r | cut -d '.' -f2`"
+    if test "$enable_linux_lfs" = no; then
+      if test "$enable_largefile" != yes; then
+        enable_largefile=no
+      fi
+    fi
+    ;;
+esac
 
-        if test ${MAJOR_VER} -gt 2 -o ${MAJOR_VER} -eq 2 -a ${MINOR_VER} -ge 4; then
-          LINUX_LFS="yes"
-        fi
-        ;;
-    esac
+if test "$enable_largefile" != no; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
 
-    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for large file support mode on Linux" >&5
-$as_echo_n "checking for large file support mode on Linux... " >&6; }
-    if test "X$LINUX_LFS" = "Xyes"; then
-      { $as_echo "$as_me:${as_lineno-$LINENO}: result: enabled" >&5
-$as_echo "enabled" >&6; }
-      AM_CPPFLAGS="-D_FILE_OFFSET_BITS=64 -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE $AM_CPPFLAGS"
-    else
-      { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled" >&5
-$as_echo "disabled" >&6; }
+      { $as_echo "$as_me:${as_lineno-$LINENO}: checking for special C compiler options needed for large files" >&5
+$as_echo_n "checking for special C compiler options needed for large files... " >&6; }
+if test "${ac_cv_sys_largefile_CC+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_cv_sys_largefile_CC=no
+     if test "$GCC" != yes; then
+       ac_save_CC=$CC
+       while :; do
+     # IRIX 6.2 and later do not support large files by default,
+     # so use the C compiler's -n32 option if that helps.
+     cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end 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];
+#ifdef FC_DUMMY_MAIN
+#ifndef FC_DUMMY_MAIN_EQ_F77
+#  ifdef __cplusplus
+     extern "C"
+#  endif
+   int FC_DUMMY_MAIN() { return 1; }
+#endif
+#endif
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+     if ac_fn_c_try_compile "$LINENO"; then :
+  break
+fi
+rm -f core conftest.err conftest.$ac_objext
+     CC="$CC -n32"
+     if ac_fn_c_try_compile "$LINENO"; then :
+  ac_cv_sys_largefile_CC=' -n32'; break
+fi
+rm -f core conftest.err conftest.$ac_objext
+     break
+       done
+       CC=$ac_save_CC
+       rm -f conftest.$ac_ext
+    fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_sys_largefile_CC" >&5
+$as_echo "$ac_cv_sys_largefile_CC" >&6; }
+  if test "$ac_cv_sys_largefile_CC" != no; then
+    CC=$CC$ac_cv_sys_largefile_CC
+  fi
+
+
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for _FILE_OFFSET_BITS value needed for large files" >&5
+$as_echo_n "checking for _FILE_OFFSET_BITS value needed for large files... " >&6; }
+if test "${ac_cv_sys_file_offset_bits+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  while :; do
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end 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];
+#ifdef FC_DUMMY_MAIN
+#ifndef FC_DUMMY_MAIN_EQ_F77
+#  ifdef __cplusplus
+     extern "C"
+#  endif
+   int FC_DUMMY_MAIN() { return 1; }
+#endif
+#endif
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  ac_cv_sys_file_offset_bits=no; break
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end 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];
+#ifdef FC_DUMMY_MAIN
+#ifndef FC_DUMMY_MAIN_EQ_F77
+#  ifdef __cplusplus
+     extern "C"
+#  endif
+   int FC_DUMMY_MAIN() { return 1; }
+#endif
+#endif
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  ac_cv_sys_file_offset_bits=64; break
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+  ac_cv_sys_file_offset_bits=unknown
+  break
+done
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_sys_file_offset_bits" >&5
+$as_echo "$ac_cv_sys_file_offset_bits" >&6; }
+case $ac_cv_sys_file_offset_bits in #(
+  no | unknown) ;;
+  *)
+cat >>confdefs.h <<_ACEOF
+#define _FILE_OFFSET_BITS $ac_cv_sys_file_offset_bits
+_ACEOF
+
+     AM_CPPFLAGS="-D_FILE_OFFSET_BITS=$ac_cv_sys_file_offset_bits $AM_CPPFLAGS";;
+esac
+rm -rf conftest*
+
+    if test $ac_cv_sys_file_offset_bits = unknown; then
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for _LARGE_FILES value needed for large files" >&5
+$as_echo_n "checking for _LARGE_FILES value needed for large files... " >&6; }
+if test "${ac_cv_sys_large_files+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  while :; do
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end 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];
+#ifdef FC_DUMMY_MAIN
+#ifndef FC_DUMMY_MAIN_EQ_F77
+#  ifdef __cplusplus
+     extern "C"
+#  endif
+   int FC_DUMMY_MAIN() { return 1; }
+#endif
+#endif
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  ac_cv_sys_large_files=no; break
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end 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];
+#ifdef FC_DUMMY_MAIN
+#ifndef FC_DUMMY_MAIN_EQ_F77
+#  ifdef __cplusplus
+     extern "C"
+#  endif
+   int FC_DUMMY_MAIN() { return 1; }
+#endif
+#endif
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  ac_cv_sys_large_files=1; break
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+  ac_cv_sys_large_files=unknown
+  break
+done
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_sys_large_files" >&5
+$as_echo "$ac_cv_sys_large_files" >&6; }
+case $ac_cv_sys_large_files in #(
+  no | unknown) ;;
+  *)
+cat >>confdefs.h <<_ACEOF
+#define _LARGE_FILES $ac_cv_sys_large_files
+_ACEOF
+
+     AM_CPPFLAGS="-D_LARGE_FILES=$ac_cv_sys_large_files $AM_CPPFLAGS";;
+esac
+rm -rf conftest*
+  fi
+
+      { $as_echo "$as_me:${as_lineno-$LINENO}: checking if large (64-bit) files are supported on this system." >&5
+$as_echo_n "checking if large (64-bit) files are supported on this system.... " >&6; }
+  if test "${hdf5_cv_have_lfs+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test "$cross_compiling" = yes; then :
+  { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error "cannot run test program while cross compiling
+See \`config.log' for more details." "$LINENO" 5; }
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+      #include <stdio.h>
+      #include <unistd.h>
+      #include <stdlib.h>
+      #include <fcntl.h>
+      #define BIG_FILE (off_t)0x80000000UL
+      int main(void) {
+        int fd;
+        if ((fd=open("test.conf", O_RDWR|O_TRUNC|O_CREAT, 0666)) < 0) exit(1);
+        if (lseek(fd, BIG_FILE, SEEK_SET)!=BIG_FILE) exit(1);
+        if (5!=write(fd, "hello", (size_t)5)) exit(1);
+        if (lseek(fd, 2*BIG_FILE, SEEK_SET) != 2*BIG_FILE) exit(1);
+        if (5!=write(fd, "hello", (size_t)5)) exit(1);
+        if (unlink("test.conf") < 0) exit(1);
+        exit(0);
+      }
+
+_ACEOF
+if ac_fn_c_try_run "$LINENO"; then :
+  hdf5_cv_have_lfs=yes
+else
+  hdf5_cv_have_lfs=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+fi
+
+
+  if test "X${hdf5_cv_have_lfs}" = "Xyes"; then
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+    LARGEFILE="yes"
+  fi
+  if test "X${hdf5_cv_have_lfs}" = "Xno"; then
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+    LARGEFILE="no"
+  fi
+
+else
+  LARGEFILE="no"
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+case "$host_cpu-$host_vendor-$host_os" in
+  *linux*)
+            if test "X$LARGEFILE" != "Xno"; then
+        AM_CPPFLAGS="-D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE $AM_CPPFLAGS"
     fi
 
                 H5_CPPFLAGS="-D_POSIX_SOURCE $H5_CPPFLAGS"
@@ -24380,6 +24676,7 @@ rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for global timezone variable" >&5
 $as_echo_n "checking for global timezone variable... " >&6; }
 
+
 case "`uname`" in
   CYGWIN*)
     { $as_echo "$as_me:${as_lineno-$LINENO}: result: disabled in CYGWIN" >&5