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* configure.in (checking whether localtime caches TZ): Use

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unsetenv instead of modifying environment directly.
This commit is contained in:
Ken Brown 2010-10-31 19:21:53 -04:00
parent 39a766fba6
commit 983ae18569
3 changed files with 9 additions and 20 deletions
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5
ChangeLog
View file

@ -1,3 +1,8 @@
2010-10-31 Ken Brown <kbrown@cornell.edu>
* configure.in (checking whether localtime caches TZ): Use
unsetenv instead of modifying environment directly.
2010-10-25 Andreas Schwab <schwab@linux-m68k.org>
* configure.in (checking for -znocombreloc): Use AC_LANG_PROGRAM

12
configure vendored
View file

@ -13982,14 +13982,6 @@ else
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
#include <time.h>
extern char **environ;
unset_TZ ()
{
char **from, **to;
for (to = from = environ; (*to = *from); from++)
if (! (to[0][0] == 'T' && to[0][1] == 'Z' && to[0][2] == '='))
to++;
}
char TZ_GMT0[] = "TZ=GMT0";
char TZ_PST8[] = "TZ=PST8";
main()
@ -13999,13 +13991,13 @@ main()
if (putenv (TZ_GMT0) != 0)
exit (1);
hour_GMT0 = localtime (&now)->tm_hour;
unset_TZ ();
unsetenv("TZ");
hour_unset = localtime (&now)->tm_hour;
if (putenv (TZ_PST8) != 0)
exit (1);
if (localtime (&now)->tm_hour == hour_GMT0)
exit (1);
unset_TZ ();
unsetenv("TZ");
if (localtime (&now)->tm_hour != hour_unset)
exit (1);
exit (0);

12
configure.in
View file

@ -2952,14 +2952,6 @@ AC_MSG_CHECKING(whether localtime caches TZ)
AC_CACHE_VAL(emacs_cv_localtime_cache,
[if test x$ac_cv_func_tzset = xyes; then
AC_TRY_RUN([#include <time.h>
extern char **environ;
unset_TZ ()
{
char **from, **to;
for (to = from = environ; (*to = *from); from++)
if (! (to[0][0] == 'T' && to[0][1] == 'Z' && to[0][2] == '='))
to++;
}
char TZ_GMT0[] = "TZ=GMT0";
char TZ_PST8[] = "TZ=PST8";
main()
@ -2969,13 +2961,13 @@ main()
if (putenv (TZ_GMT0) != 0)
exit (1);
hour_GMT0 = localtime (&now)->tm_hour;
unset_TZ ();
unsetenv("TZ");
hour_unset = localtime (&now)->tm_hour;
if (putenv (TZ_PST8) != 0)
exit (1);
if (localtime (&now)->tm_hour == hour_GMT0)
exit (1);
unset_TZ ();
unsetenv("TZ");
if (localtime (&now)->tm_hour != hour_unset)
exit (1);
exit (0);