+dnl Is timezone around? (in a header file)
+dnl
+AC_DEFUN(FPTOOLS_HAVE_TIMEZONE,
+[AC_CACHE_CHECK([timezone], fptools_cv_have_timezone,
+[AC_TRY_COMPILE([#if TIME_WITH_SYS_TIME
+# include <sys/time.h>
+# include <time.h>
+#else
+# if HAVE_SYS_TIME_H
+# include <sys/time.h>
+# else
+# include <time.h>
+# endif
+#endif
+], [return timezone;],
+fptools_cv_have_timezone=yes, fptools_cv_have_timezone=no)])
+if test "$fptools_cv_have_timezone" = yes; then
+ AC_DEFINE(HAVE_TIMEZONE)
+fi
+])
+
+dnl