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# getdate.m4 serial 13
dnl Copyright (C) 2002-2006, 2008 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 Define HAVE_COMPOUND_LITERALS if the C compiler supports compound literals
dnl as in ISO C99.
dnl Note that compound literals such as (struct s) { 3, 4 } can be used for
dnl initialization of stack-allocated variables, but are not constant
dnl expressions and therefore cannot be used as initializer for global or
dnl static variables (even though gcc supports this in pre-C99 mode).
AC_DEFUN([gl_C_COMPOUND_LITERALS],
[
AC_CACHE_CHECK([for compound literals], gl_cv_compound_literals,
[AC_TRY_COMPILE([struct s { int i, j; };],
[struct s t = (struct s) { 3, 4 };
if (t.i != 0) return 0;],
gl_cv_compound_literals=yes,
gl_cv_compound_literals=no)])
if test $gl_cv_compound_literals = yes; then
AC_DEFINE(HAVE_COMPOUND_LITERALS, 1,
[Define if you have compound literals.])
fi
])
AC_DEFUN([gl_GETDATE],
[
dnl Prerequisites of lib/getdate.h.
AC_REQUIRE([AM_STDBOOL_H])
AC_REQUIRE([gl_TIMESPEC])
dnl Prerequisites of lib/getdate.y.
AC_REQUIRE([gl_BISON])
AC_REQUIRE([gl_C_COMPOUND_LITERALS])
AC_STRUCT_TIMEZONE
AC_REQUIRE([gl_CLOCK_TIME])
AC_REQUIRE([gl_TM_GMTOFF])
])
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