dnl Time zone functions: tzalloc, localtime_rz, etc. dnl Copyright (C) 2015-2018 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, dnl with or without modifications, as long as this notice is preserved. dnl Written by Paul Eggert. AC_DEFUN([gl_TIME_RZ], [ AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) AC_REQUIRE([gl_HEADER_TIME_H_DEFAULTS]) AC_REQUIRE([AC_STRUCT_TIMEZONE]) AC_CHECK_TYPES([timezone_t], [], [], [[#include ]]) if test "$ac_cv_type_timezone_t" = yes; then HAVE_TIMEZONE_T=1 fi ])