(jm_FUNC_GNU_STRFTIME): Set TZ environment

variable in the shell rather than using putenv, which isn't
portable.  This avoids the configure-time inter-test dependency
on the potentially-renamed putenv function.

diff --git a/m4/strftime.m4 b/m4/strftime.m4
index 5275694..974f2bf 100644 (file)
--- a/m4/strftime.m4
+++ b/m4/strftime.m4
@@ -1,4 +1,4 @@
-#serial 9
+#serial 10

 
 dnl This macro is intended to be used solely in this file.
 dnl These are the prerequisite macros for GNU's strftime.c replacement.
 
 dnl This macro is intended to be used solely in this file.
 dnl These are the prerequisite macros for GNU's strftime.c replacement.


@@ -35,7 +35,11 @@ AC_DEFUN(jm_FUNC_GNU_STRFTIME,
  AC_REQUIRE([AC_HEADER_STDC])dnl
  AC_CHECK_HEADERS(sys/time.h)
  AC_CACHE_CHECK([for working GNU strftime], jm_cv_func_working_gnu_strftime,
  AC_REQUIRE([AC_HEADER_STDC])dnl
  AC_CHECK_HEADERS(sys/time.h)
  AC_CACHE_CHECK([for working GNU strftime], jm_cv_func_working_gnu_strftime,

-  [AC_TRY_RUN(
+  [# Set TZ to GMT0 to make strftime give consistent results during the test.
+   ac_save_TZ="${TZ-GMT0}"
+   TZ=GMT0
+   export TZ
+   AC_TRY_RUN(

 [ /* Ulrich Drepper provided parts of the test program.  */
 #if STDC_HEADERS
 # include <stdlib.h>
 [ /* Ulrich Drepper provided parts of the test program.  */
 #if STDC_HEADERS
 # include <stdlib.h>


@@ -76,10 +80,6 @@ main ()
   time_t t = 738367; /* Fri Jan  9 13:06:07 1970 */
   tm = gmtime (&t);
 
   time_t t = 738367; /* Fri Jan  9 13:06:07 1970 */
   tm = gmtime (&t);
 

-  /* This is necessary to make strftime give consistent zone strings and
-     e.g., seconds since the epoch (%s).  */
-  putenv ("TZ=GMT0");
-

 #undef CMP
 #define CMP(Fmt, Expected) n_fail += compare ((Fmt), tm, (Expected))
 
 #undef CMP
 #define CMP(Fmt, Expected) n_fail += compare ((Fmt), tm, (Expected))
 


@@ -138,6 +138,8 @@ main ()
              jm_cv_func_working_gnu_strftime=no,
             dnl When crosscompiling, assume strftime is missing or broken.
             jm_cv_func_working_gnu_strftime=no)
              jm_cv_func_working_gnu_strftime=no,
             dnl When crosscompiling, assume strftime is missing or broken.
             jm_cv_func_working_gnu_strftime=no)

+   dnl If TZ wasn't set before, this sets it to GMT0.  No real harm done.
+   TZ="$ac_save_TZ"

   ])
   if test $jm_cv_func_working_gnu_strftime = no; then
     AC_SUBST(LIBOBJS)
   ])
   if test $jm_cv_func_working_gnu_strftime = no; then
     AC_SUBST(LIBOBJS)