[svn-r26276] Merged r26075-80, 86 from features/autotools_rework branch.

Cleans up time functions in the autotools input files. Removed deprecated
gettimeofday() time zone code and configure processing. Also removed
some unused time function configure checks and defines.

Fixes: HDFFV-9083 and HDFFV-9085

Tested on: 32-bit linux, serial and parallel (jam)
           OS X (kite)
           Solaris (emu)

8 files changed, 83 insertions, 587 deletions

diff --git a/config/cmake/H5pubconf.h.in b/config/cmake/H5pubconf.h.in
index 310fff2..a557364 100644
--- a/config/cmake/H5pubconf.h.in
+++ b/config/cmake/H5pubconf.h.in
@@ -86,9 +86,6 @@
    long long values. */
 #cmakedefine H5_FP_TO_ULLONG_RIGHT_MAXIMUM @H5_FP_TO_ULLONG_RIGHT_MAXIMUM@
 
-/* Define if gettimeofday() populates the tz pointer passed in */
-#cmakedefine H5_GETTIMEOFDAY_GIVES_TZ @H5_GETTIMEOFDAY_GIVES_TZ@
-
 /* Define to 1 if you have the `alarm' function. */
 #cmakedefine H5_HAVE_ALARM @H5_HAVE_ALARM@
 
@@ -98,9 +95,6 @@
 /* Define if the __attribute__(()) extension is present */
 #cmakedefine H5_HAVE_ATTRIBUTE @H5_HAVE_ATTRIBUTE@
 
-/* Define to 1 if you have the `BSDgettimeofday' function. */
-#cmakedefine H5_HAVE_BSDGETTIMEOFDAY @H5_HAVE_BSDGETTIMEOFDAY@
-
 /* Define if the compiler understands C99 designated initialization of structs
    and unions */
 #cmakedefine H5_HAVE_C99_DESIGNATED_INITIALIZER @H5_HAVE_C99_DESIGNATED_INITIALIZER@
@@ -374,12 +368,6 @@
 /* Define if `struct text_info' is defined */
 #cmakedefine H5_HAVE_STRUCT_TEXT_INFO @H5_HAVE_STRUCT_TEXT_INFO@
 
-/* Define if `struct timezone' is defined */
-#cmakedefine H5_HAVE_STRUCT_TIMEZONE @H5_HAVE_STRUCT_TIMEZONE@
-
-/* Define to 1 if `tm_zone' is a member of `struct tm'. */
-#cmakedefine H5_HAVE_STRUCT_TM_TM_ZONE @H5_HAVE_STRUCT_TM_TM_ZONE@
-
 /* Define if `struct videoconfig' is defined */
 #cmakedefine H5_HAVE_STRUCT_VIDEOCONFIG @H5_HAVE_STRUCT_VIDEOCONFIG@
 
@@ -443,14 +431,6 @@
 /* Define if `tm_gmtoff' is a member of `struct tm' */
 #cmakedefine H5_HAVE_TM_GMTOFF @H5_HAVE_TM_GMTOFF@
 
-/* Define to 1 if your `struct tm' has `tm_zone'. Deprecated, use
-   `HAVE_STRUCT_TM_TM_ZONE' instead. */
-#cmakedefine H5_HAVE_TM_ZONE @H5_HAVE_TM_ZONE@
-
-/* Define to 1 if you don't have `tm_zone' but do have the external array
-   `tzname'. */
-#cmakedefine H5_HAVE_TZNAME @H5_HAVE_TZNAME@
-
 /* Define to 1 if you have the <unistd.h> header file. */
 #cmakedefine H5_HAVE_UNISTD_H @H5_HAVE_UNISTD_H@
 
@@ -481,9 +461,6 @@
 /* Define to 1 if you have the `_scrsize' function. */
 #cmakedefine H5_HAVE__SCRSIZE @H5_HAVE__SCRSIZE@
 
-/* Define if `__tm_gmtoff' is a member of `struct tm' */
-#cmakedefine H5_HAVE___TM_GMTOFF @H5_HAVE___TM_GMTOFF@
-
 /* Define if your system can't handle converting floating-point values to long
    long. */
 #cmakedefine H5_HW_FP_TO_LLONG_NOT_WORKS @H5_HW_FP_TO_LLONG_NOT_WORKS@
diff --git a/configure b/configure
index 80fe73b..c77990b 100755
--- a/configure
+++ b/configure
@@ -2680,79 +2680,6 @@ $as_echo "$ac_res" >&6; }
   eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
 
 } # ac_fn_c_check_decl
-
-# ac_fn_c_check_member LINENO AGGR MEMBER VAR INCLUDES
-# ----------------------------------------------------
-# Tries to find if the field MEMBER exists in type AGGR, after including
-# INCLUDES, setting cache variable VAR accordingly.
-ac_fn_c_check_member ()
-{
-  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2.$3" >&5
-$as_echo_n "checking for $2.$3... " >&6; }
-if eval \${$4+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-$5
-#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 ()
-{
-static $2 ac_aggr;
-if (ac_aggr.$3)
-return 0;
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
-  eval "$4=yes"
-else
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-$5
-#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 ()
-{
-static $2 ac_aggr;
-if (sizeof ac_aggr.$3)
-return 0;
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
-  eval "$4=yes"
-else
-  eval "$4=no"
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-fi
-eval ac_res=\$$4
-	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
-$as_echo "$ac_res" >&6; }
-  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
-
-} # ac_fn_c_check_member
 cat >config.log <<_ACEOF
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
@@ -22538,113 +22465,6 @@ $as_echo "#define TIME_WITH_SYS_TIME 1" >>confdefs.h
 fi
 
 
-## ----------------------------------------------------------------------
-## Check for these two functions before the time headers are checked
-## for, otherwise they are not detected correctly on Solaris (the
-## configure test will fail due to multiply-defined symbols).
-##
-for ac_func in difftime
-do :
-  ac_fn_c_check_func "$LINENO" "difftime" "ac_cv_func_difftime"
-if test "x$ac_cv_func_difftime" = xyes; then :
-  cat >>confdefs.h <<_ACEOF
-#define HAVE_DIFFTIME 1
-_ACEOF
-
-fi
-done
-
-for ac_func in gettimeofday
-do :
-  ac_fn_c_check_func "$LINENO" "gettimeofday" "ac_cv_func_gettimeofday"
-if test "x$ac_cv_func_gettimeofday" = xyes; then :
-  cat >>confdefs.h <<_ACEOF
-#define HAVE_GETTIMEOFDAY 1
-_ACEOF
- have_gettime="yes"
-else
-  have_gettime="no"
-fi
-done
-
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing clock_gettime" >&5
-$as_echo_n "checking for library containing clock_gettime... " >&6; }
-if ${ac_cv_search_clock_gettime+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  ac_func_search_save_LIBS=$LIBS
-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-/* Override any GCC internal prototype to avoid an error.
-   Use char because int might match the return type of a GCC
-   builtin and then its argument prototype would still apply.  */
-#ifdef __cplusplus
-extern "C"
-#endif
-char clock_gettime ();
-#ifdef FC_DUMMY_MAIN
-#ifndef FC_DUMMY_MAIN_EQ_F77
-#  ifdef __cplusplus
-     extern "C"
-#  endif
-   int FC_DUMMY_MAIN() { return 1; }
-#endif
-#endif
-int
-main ()
-{
-return clock_gettime ();
-  ;
-  return 0;
-}
-_ACEOF
-for ac_lib in '' rt posix4; do
-  if test -z "$ac_lib"; then
-    ac_res="none required"
-  else
-    ac_res=-l$ac_lib
-    LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
-  fi
-  if ac_fn_c_try_link "$LINENO"; then :
-  ac_cv_search_clock_gettime=$ac_res
-fi
-rm -f core conftest.err conftest.$ac_objext \
-    conftest$ac_exeext
-  if ${ac_cv_search_clock_gettime+:} false; then :
-  break
-fi
-done
-if ${ac_cv_search_clock_gettime+:} false; then :
-
-else
-  ac_cv_search_clock_gettime=no
-fi
-rm conftest.$ac_ext
-LIBS=$ac_func_search_save_LIBS
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_clock_gettime" >&5
-$as_echo "$ac_cv_search_clock_gettime" >&6; }
-ac_res=$ac_cv_search_clock_gettime
-if test "$ac_res" != no; then :
-  test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
-
-fi
-
-for ac_func in clock_gettime
-do :
-  ac_fn_c_check_func "$LINENO" "clock_gettime" "ac_cv_func_clock_gettime"
-if test "x$ac_cv_func_clock_gettime" = xyes; then :
-  cat >>confdefs.h <<_ACEOF
-#define HAVE_CLOCK_GETTIME 1
-_ACEOF
- have_clock_gettime="yes"
-else
-  have_clock_gettime="no"
-fi
-done
-
-
 ## Unix
 for ac_header in sys/resource.h sys/time.h unistd.h sys/ioctl.h sys/stat.h
 do :
@@ -26335,42 +26155,6 @@ $as_echo "no" >&6; }
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
 
-## check if `struct tm' has a `__tm_gmtoff' member.
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for __tm_gmtoff in struct tm" >&5
-$as_echo_n "checking for __tm_gmtoff in struct tm... " >&6; }
-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-  #include <sys/time.h>
-  #include <time.h>
-#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 ()
-{
-struct tm tm; tm.__tm_gmtoff=0;
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
-
-$as_echo "#define HAVE___TM_GMTOFF 1" >>confdefs.h
-
-     { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
-else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-
 ## Check whether the global variable `timezone' is defined.
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for global timezone variable" >&5
 $as_echo_n "checking for global timezone variable... " >&6; }
@@ -26417,217 +26201,6 @@ rm -f core conftest.err conftest.$ac_objext \
     ;;
 esac
 
-## Check whether `struct timezone' is defined.
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether struct tm is in sys/time.h or time.h" >&5
-$as_echo_n "checking whether struct tm is in sys/time.h or time.h... " >&6; }
-if ${ac_cv_struct_tm+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-#include <sys/types.h>
-#include <time.h>
-
-#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 ()
-{
-struct tm tm;
-				     int *p = &tm.tm_sec;
-				     return !p;
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
-  ac_cv_struct_tm=time.h
-else
-  ac_cv_struct_tm=sys/time.h
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_struct_tm" >&5
-$as_echo "$ac_cv_struct_tm" >&6; }
-if test $ac_cv_struct_tm = sys/time.h; then
-
-$as_echo "#define TM_IN_SYS_TIME 1" >>confdefs.h
-
-fi
-
-ac_fn_c_check_member "$LINENO" "struct tm" "tm_zone" "ac_cv_member_struct_tm_tm_zone" "#include <sys/types.h>
-#include <$ac_cv_struct_tm>
-
-"
-if test "x$ac_cv_member_struct_tm_tm_zone" = xyes; then :
-
-cat >>confdefs.h <<_ACEOF
-#define HAVE_STRUCT_TM_TM_ZONE 1
-_ACEOF
-
-
-fi
-
-if test "$ac_cv_member_struct_tm_tm_zone" = yes; then
-
-$as_echo "#define HAVE_TM_ZONE 1" >>confdefs.h
-
-else
-  ac_fn_c_check_decl "$LINENO" "tzname" "ac_cv_have_decl_tzname" "#include <time.h>
-"
-if test "x$ac_cv_have_decl_tzname" = xyes; then :
-  ac_have_decl=1
-else
-  ac_have_decl=0
-fi
-
-cat >>confdefs.h <<_ACEOF
-#define HAVE_DECL_TZNAME $ac_have_decl
-_ACEOF
-
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for tzname" >&5
-$as_echo_n "checking for tzname... " >&6; }
-if ${ac_cv_var_tzname+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-#include <time.h>
-#if !HAVE_DECL_TZNAME
-extern char *tzname[];
-#endif
-
-#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 tzname[0][0];
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
-  ac_cv_var_tzname=yes
-else
-  ac_cv_var_tzname=no
-fi
-rm -f core conftest.err conftest.$ac_objext \
-    conftest$ac_exeext conftest.$ac_ext
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_var_tzname" >&5
-$as_echo "$ac_cv_var_tzname" >&6; }
-  if test $ac_cv_var_tzname = yes; then
-
-$as_echo "#define HAVE_TZNAME 1" >>confdefs.h
-
-  fi
-fi
-
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for struct timezone" >&5
-$as_echo_n "checking for struct timezone... " >&6; }
-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-  #include <sys/types.h>
-  #include <sys/time.h>
-  #include <time.h>
-#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 ()
-{
-struct timezone tz; tz.tz_minuteswest=0;
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
-
-$as_echo "#define HAVE_STRUCT_TIMEZONE 1" >>confdefs.h
-
-    have_struct_tz="yes"
-    { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
-else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-
-## If gettimeofday() is going to be used, make sure it uses the timezone struct
-
-if test "$have_gettime" = "yes" -a "$have_struct_tz" = "yes"; then
-   { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether gettimeofday() gives timezone" >&5
-$as_echo_n "checking whether gettimeofday() gives timezone... " >&6; }
-   if ${hdf5_cv_gettimeofday_tz+:} false; 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.$ac_ext
-/* end confdefs.h.  */
-
-          #include <time.h>
-          #include <sys/time.h>
-          int main(void)
-          {
-             struct timeval tv;
-             struct timezone tz;
-             tz.tz_minuteswest = 7777;  /* Initialize to an unreasonable number */
-             tz.tz_dsttime = 7;
-             gettimeofday(&tv, &tz);
-                /* Check whether the function returned any value at all */
-             if(tz.tz_minuteswest == 7777 && tz.tz_dsttime == 7)
-                exit(1);
-             else exit (0);
-          }
-_ACEOF
-if ac_fn_c_try_run "$LINENO"; then :
-  hdf5_cv_gettimeofday_tz=yes
-else
-  hdf5_cv_gettimeofday_tz=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 ${hdf5_cv_gettimeofday_tz} = "yes"; then
-      { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
-
-$as_echo "#define GETTIMEOFDAY_GIVES_TZ 1" >>confdefs.h
-
-   else
-      { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
-   fi
-fi
 
 ## ----------------------------------------------------------------------
 ## Does the struct stat have the st_blocks field?  This field is not Posix.
@@ -26847,7 +26420,73 @@ rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
 ## ----------------------------------------------------------------------
 ## Check for functions.
 ##
-for ac_func in alarm BSDgettimeofday fork frexpf frexpl
+## NOTE: clock_gettime may require linking to the rt or posix4 library
+##       so we'll search for it before calling AC_CHECK_FUNCS.
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing clock_gettime" >&5
+$as_echo_n "checking for library containing clock_gettime... " >&6; }
+if ${ac_cv_search_clock_gettime+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_func_search_save_LIBS=$LIBS
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char clock_gettime ();
+#ifdef FC_DUMMY_MAIN
+#ifndef FC_DUMMY_MAIN_EQ_F77
+#  ifdef __cplusplus
+     extern "C"
+#  endif
+   int FC_DUMMY_MAIN() { return 1; }
+#endif
+#endif
+int
+main ()
+{
+return clock_gettime ();
+  ;
+  return 0;
+}
+_ACEOF
+for ac_lib in '' rt posix4; do
+  if test -z "$ac_lib"; then
+    ac_res="none required"
+  else
+    ac_res=-l$ac_lib
+    LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
+  fi
+  if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_search_clock_gettime=$ac_res
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext
+  if ${ac_cv_search_clock_gettime+:} false; then :
+  break
+fi
+done
+if ${ac_cv_search_clock_gettime+:} false; then :
+
+else
+  ac_cv_search_clock_gettime=no
+fi
+rm conftest.$ac_ext
+LIBS=$ac_func_search_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_clock_gettime" >&5
+$as_echo "$ac_cv_search_clock_gettime" >&6; }
+ac_res=$ac_cv_search_clock_gettime
+if test "$ac_res" != no; then :
+  test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
+
+fi
+
+for ac_func in alarm clock_gettime difftime fork frexpf frexpl
 do :
   as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
 ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"
@@ -26859,7 +26498,7 @@ _ACEOF
 fi
 done
 
-for ac_func in gethostname getpwuid getrusage lstat
+for ac_func in gethostname getpwuid getrusage gettimeofday
 do :
   as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
 ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"
@@ -26871,7 +26510,7 @@ _ACEOF
 fi
 done
 
-for ac_func in rand_r random setsysinfo
+for ac_func in lstat rand_r random setsysinfo
 do :
   as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
 ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"
diff --git a/configure.ac b/configure.ac
index 3b8b2eb..f53c8a6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -997,16 +997,6 @@ dnl AC_CHECK_LIB([coug], [main])		## ...for ASCI/Red
 AC_HEADER_STDC
 AC_HEADER_TIME
 
-## ----------------------------------------------------------------------
-## Check for these two functions before the time headers are checked
-## for, otherwise they are not detected correctly on Solaris (the
-## configure test will fail due to multiply-defined symbols).
-##
-AC_CHECK_FUNCS([difftime])
-AC_CHECK_FUNCS([gettimeofday], [have_gettime="yes"], [have_gettime="no"])
-AC_SEARCH_LIBS([clock_gettime], [rt posix4])
-AC_CHECK_FUNCS([clock_gettime],[have_clock_gettime="yes"],[have_clock_gettime="no"])
-
 ## Unix
 AC_CHECK_HEADERS([sys/resource.h sys/time.h unistd.h sys/ioctl.h sys/stat.h])
 AC_CHECK_HEADERS([sys/socket.h sys/types.h])
@@ -1741,16 +1731,6 @@ AC_TRY_COMPILE([
     AC_MSG_RESULT([yes])],
   [AC_MSG_RESULT([no])])
 
-## check if `struct tm' has a `__tm_gmtoff' member.
-AC_MSG_CHECKING([for __tm_gmtoff in struct tm])
-AC_TRY_COMPILE([
-  #include <sys/time.h>
-  #include <time.h>], [struct tm tm; tm.__tm_gmtoff=0;],
-  [AC_DEFINE([HAVE___TM_GMTOFF], [1],
-          [Define if `__tm_gmtoff' is a member of `struct tm'])
-     AC_MSG_RESULT([yes])],
-  [AC_MSG_RESULT([no])])
-
 ## Check whether the global variable `timezone' is defined.
 AC_MSG_CHECKING([for global timezone variable])
 
@@ -1769,50 +1749,6 @@ case "`uname`" in
     ;;
 esac
 
-## Check whether `struct timezone' is defined.
-AC_STRUCT_TIMEZONE
-AC_MSG_CHECKING([for struct timezone])
-AC_TRY_COMPILE([
-  #include <sys/types.h>
-  #include <sys/time.h>
-  #include <time.h>], [struct timezone tz; tz.tz_minuteswest=0;],
-  [AC_DEFINE([HAVE_STRUCT_TIMEZONE], [1],
-          [Define if `struct timezone' is defined])
-    have_struct_tz="yes"
-    AC_MSG_RESULT([yes])],
-  [AC_MSG_RESULT([no])])
-
-## If gettimeofday() is going to be used, make sure it uses the timezone struct
-
-if test "$have_gettime" = "yes" -a "$have_struct_tz" = "yes"; then
-   AC_MSG_CHECKING(whether gettimeofday() gives timezone)
-   AC_CACHE_VAL([hdf5_cv_gettimeofday_tz],
-       [AC_TRY_RUN([
-          #include <time.h>
-          #include <sys/time.h>
-          int main(void)
-          {
-             struct timeval tv;
-             struct timezone tz;
-             tz.tz_minuteswest = 7777;  /* Initialize to an unreasonable number */
-             tz.tz_dsttime = 7;
-             gettimeofday(&tv, &tz);
-                /* Check whether the function returned any value at all */
-             if(tz.tz_minuteswest == 7777 && tz.tz_dsttime == 7)
-                exit(1);
-             else exit (0);
-          }], 
-          [hdf5_cv_gettimeofday_tz=yes], 
-          [hdf5_cv_gettimeofday_tz=no])])
-
-   if test ${hdf5_cv_gettimeofday_tz} = "yes"; then
-      AC_MSG_RESULT([yes])
-      AC_DEFINE([GETTIMEOFDAY_GIVES_TZ], [1],
-                [Define if gettimeofday() populates the tz pointer passed in])
-   else
-      AC_MSG_RESULT([no])
-   fi
-fi 
 
 ## ----------------------------------------------------------------------
 ## Does the struct stat have the st_blocks field?  This field is not Posix.
@@ -1870,9 +1806,12 @@ AC_TRY_COMPILE([#include <sys/ioctl.h>],[int w=TIOCGETD;],
 ## ----------------------------------------------------------------------
 ## Check for functions.
 ##
-AC_CHECK_FUNCS([alarm BSDgettimeofday fork frexpf frexpl])
-AC_CHECK_FUNCS([gethostname getpwuid getrusage lstat])
-AC_CHECK_FUNCS([rand_r random setsysinfo])
+## NOTE: clock_gettime may require linking to the rt or posix4 library
+##       so we'll search for it before calling AC_CHECK_FUNCS.
+AC_SEARCH_LIBS([clock_gettime], [rt posix4])
+AC_CHECK_FUNCS([alarm clock_gettime difftime fork frexpf frexpl])
+AC_CHECK_FUNCS([gethostname getpwuid getrusage gettimeofday])
+AC_CHECK_FUNCS([lstat rand_r random setsysinfo])
 AC_CHECK_FUNCS([signal longjmp setjmp siglongjmp sigsetjmp sigprocmask])
 AC_CHECK_FUNCS([snprintf srandom strdup symlink system])
 AC_CHECK_FUNCS([tmpfile asprintf vasprintf waitpid])
diff --git a/src/H5Omtime.c b/src/H5Omtime.c
index 612d656..c9375f9 100644
--- a/src/H5Omtime.c
+++ b/src/H5Omtime.c
@@ -200,8 +200,8 @@ H5O_mtime_decode(H5F_t UNUSED *f, hid_t UNUSED dxpl_id, H5O_t UNUSED *open_oh,
 
     /* decode */
     for(i = 0; i < 14; i++)
-	if(!HDisdigit(p[i]))
-	    HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, NULL, "badly formatted modification time message")
+        if(!HDisdigit(p[i]))
+            HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, NULL, "badly formatted modification time message")
 
     /*
      * Convert YYYYMMDDhhmmss UTC to a time_t.  This is a little problematic
@@ -219,36 +219,14 @@ H5O_mtime_decode(H5F_t UNUSED *f, hid_t UNUSED dxpl_id, H5O_t UNUSED *open_oh,
     tm.tm_sec = (p[12]-'0')*10 + (p[13]-'0');
     tm.tm_isdst = -1; /*figure it out*/
     if((time_t)-1 == (the_time = HDmktime(&tm)))
-	HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, NULL, "badly formatted modification time message")
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, NULL, "badly formatted modification time message")
 
 #if defined(H5_HAVE_TM_GMTOFF)
-    /* FreeBSD, OSF 4.0 */
+    /* BSD-like systems */
     the_time += tm.tm_gmtoff;
-#elif defined(H5_HAVE___TM_GMTOFF)
-    /* Linux libc-4 */
-    the_time += tm.__tm_gmtoff;
 #elif defined(H5_HAVE_TIMEZONE)
-    /* Linux libc-5 */
-    the_time -= timezone - (tm.tm_isdst?3600:0);
-#elif defined(H5_HAVE_BSDGETTIMEOFDAY) && defined(H5_HAVE_STRUCT_TIMEZONE)
-    /* Irix5.3 */
-    {
-        struct timezone tz;
-
-        if(HDBSDgettimeofday(NULL, &tz) < 0)
-            HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, NULL, "unable to obtain local timezone information")
-        the_time -= tz.tz_minuteswest * 60 - (tm.tm_isdst ? 3600 : 0);
-    }
-#elif defined(H5_HAVE_GETTIMEOFDAY) && defined(H5_HAVE_STRUCT_TIMEZONE) && defined(H5_GETTIMEOFDAY_GIVES_TZ)
-    {
-	struct timezone tz;
-	struct timeval tv;  /* Used as a placebo; some systems don't like NULL */
-
-	if(HDgettimeofday(&tv, &tz) < 0)
-	    HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, NULL, "unable to obtain local timezone information")
-
-	the_time -= tz.tz_minuteswest * 60 - (tm.tm_isdst ? 3600 : 0);
-    }
+    /* GNU/Linux systems */
+    the_time -= timezone - (tm.tm_isdst ? 3600 : 0);
 #else
     /*
      * The catch-all.  If we can't convert a character string universal
@@ -257,14 +235,12 @@ H5O_mtime_decode(H5F_t UNUSED *f, hid_t UNUSED dxpl_id, H5O_t UNUSED *open_oh,
      * only way a user can get the modification time is from our internal
      * query routines, which can gracefully recover.
      */
-
-    /* Irix64 */
     HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, NULL, "unable to obtain local timezone information")
 #endif
 
     /* The return value */
     if(NULL == (mesg = H5FL_MALLOC(time_t)))
-	HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
+        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
     *mesg = the_time;
 
     /* Set return value */
diff --git a/src/H5config.h.in b/src/H5config.h.in
index 6b6ffdd..42dfcfb 100644
--- a/src/H5config.h.in
+++ b/src/H5config.h.in
@@ -49,9 +49,6 @@
    long long values. */
 #undef FP_TO_ULLONG_RIGHT_MAXIMUM
 
-/* Define if gettimeofday() populates the tz pointer passed in */
-#undef GETTIMEOFDAY_GIVES_TZ
-
 /* Define to 1 if you have the `alarm' function. */
 #undef HAVE_ALARM
 
@@ -61,9 +58,6 @@
 /* Define if the __attribute__(()) extension is present */
 #undef HAVE_ATTRIBUTE
 
-/* Define to 1 if you have the `BSDgettimeofday' function. */
-#undef HAVE_BSDGETTIMEOFDAY
-
 /* Define if the compiler understands C99 designated initialization of structs
    and unions */
 #undef HAVE_C99_DESIGNATED_INITIALIZER
@@ -80,10 +74,6 @@
 /* Define if Darwin or Mac OS X */
 #undef HAVE_DARWIN
 
-/* Define to 1 if you have the declaration of `tzname', and to 0 if you don't.
-   */
-#undef HAVE_DECL_TZNAME
-
 /* Define to 1 if you have the `difftime' function. */
 #undef HAVE_DIFFTIME
 
@@ -310,12 +300,6 @@
 /* Define if `struct text_info' is defined */
 #undef HAVE_STRUCT_TEXT_INFO
 
-/* Define if `struct timezone' is defined */
-#undef HAVE_STRUCT_TIMEZONE
-
-/* Define to 1 if `tm_zone' is a member of `struct tm'. */
-#undef HAVE_STRUCT_TM_TM_ZONE
-
 /* Define if `struct videoconfig' is defined */
 #undef HAVE_STRUCT_VIDEOCONFIG
 
@@ -376,14 +360,6 @@
 /* Define if `tm_gmtoff' is a member of `struct tm' */
 #undef HAVE_TM_GMTOFF
 
-/* Define to 1 if your `struct tm' has `tm_zone'. Deprecated, use
-   `HAVE_STRUCT_TM_TM_ZONE' instead. */
-#undef HAVE_TM_ZONE
-
-/* Define to 1 if you don't have `tm_zone' but do have the external array
-   `tzname'. */
-#undef HAVE_TZNAME
-
 /* Define to 1 if you have the <unistd.h> header file. */
 #undef HAVE_UNISTD_H
 
@@ -411,9 +387,6 @@
 /* Define to 1 if you have the `_scrsize' function. */
 #undef HAVE__SCRSIZE
 
-/* Define if `__tm_gmtoff' is a member of `struct tm' */
-#undef HAVE___TM_GMTOFF
-
 /* Define if your system can't handle converting floating-point values to long
    long. */
 #undef HW_FP_TO_LLONG_NOT_WORKS
@@ -621,9 +594,6 @@
 /* Define to 1 if you can safely include both <sys/time.h> and <time.h>. */
 #undef TIME_WITH_SYS_TIME
 
-/* Define to 1 if your <sys/time.h> declares `struct tm'. */
-#undef TM_IN_SYS_TIME
-
 /* Define if your system can compile unsigned long long to floating-point
    casts. */
 #undef ULLONG_TO_FP_CAST_WORKS
diff --git a/src/H5private.h b/src/H5private.h
index f70530d..a532c79 100644
--- a/src/H5private.h
+++ b/src/H5private.h
@@ -571,9 +571,6 @@ typedef struct {
 #ifndef HDatol
     #define HDatol(S)    atol(S)
 #endif /* HDatol */
-#ifndef HDBSDgettimeofday
-    #define HDBSDgettimeofday(S,P)  BSDgettimeofday(S,P)
-#endif /* HDBSDgettimeofday */
 #ifndef HDbsearch
     #define HDbsearch(K,B,N,Z,F)  bsearch(K,B,N,Z,F)
 #endif /* HDbsearch */
diff --git a/testpar/t_cache.c b/testpar/t_cache.c
index 20fb9fd..f526a8b 100644
--- a/testpar/t_cache.c
+++ b/testpar/t_cache.c
@@ -4245,7 +4245,6 @@ setup_rand(void)
     unsigned predefined_seeds[3] = {33402, 33505, 33422};
     unsigned seed;
     struct timeval tv;
-    struct timezone tz;
 
     if ( ( use_predefined_seeds ) &&
          ( world_mpi_size == num_predefined_seeds ) ) {
@@ -4261,7 +4260,7 @@ setup_rand(void)
 
     } else {
 
-        if ( HDgettimeofday(&tv, &tz) != 0 ) {
+        if ( HDgettimeofday(&tv, NULL) != 0 ) {
 
             nerrors++;
             if ( verbose ) {
diff --git a/tools/perform/sio_standalone.h b/tools/perform/sio_standalone.h
index b2f8220..4eb1ded 100644
--- a/tools/perform/sio_standalone.h
+++ b/tools/perform/sio_standalone.h
@@ -87,7 +87,6 @@
 #define HDatof(S)               atof(S)
 #define HDatoi(S)               atoi(S)
 #define HDatol(S)               atol(S)
-#define HDBSDgettimeofday(S,P)  BSDgettimeofday(S,P)
 #define HDbsearch(K,B,N,Z,F)    bsearch(K,B,N,Z,F)
 #define HDcalloc(N,Z)           calloc(N,Z)
 #define HDceil(X)               ceil(X)