[svn-r8937]

Purpose:
Bug fix

Description:
Modification time test (mtime) would die silently on some systems.  This is
because the code is very system-dependant (it relies on getting the current
time and the timezone from the OS).

Solution:
mtime test now uses TEST_ERROR macro to print "FAILED" and to output where the
failure occurred.  Configure script is a little smarter about whether
gettimeofday() function returns the timezone correctly.
Further bugs will need to be addressed on a system-by-system basis.

Platforms tested:
sleipnir, arabica, verbena, copper, windows (VC7)

1 files changed, 32 insertions, 1 deletions

diff --git a/configure.in b/configure.in
index a0a6c2f..8d736d0 100644
--- a/configure.in
+++ b/configure.in
@@ -537,7 +537,8 @@ dnl ----------------------------------------------------------------------
 dnl Check for these two functions before <sys/time.h> is checked for, otherwise
 dnl they are not detected correctly on Solaris [2.6].
 dnl
-AC_CHECK_FUNCS(difftime gettimeofday)
+AC_CHECK_FUNCS(difftime)
+AC_CHECK_FUNCS([gettimeofday], [have_gettime="yes"], [have_gettime="no"])
 
 dnl Unix
 AC_CHECK_HEADERS([sys/resource.h sys/time.h unistd.h sys/ioctl.h sys/stat.h])
@@ -1495,9 +1496,39 @@ AC_TRY_COMPILE([
 #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))
 
+dnl 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_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_use_tz="yes"], [hdf5_use_tz="no"],)
+
+   if test "$hdf5_use_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 
+
 dnl ----------------------------------------------------------------------
 dnl Does the struct stat have the st_blocks field?  This field is not Posix.
 dnl