1 dnl $Id: check-declaration.m4,v 1.3.34.1 2004/04/01 07:27:32 joda Exp $
4 dnl Check if we need the declaration of a variable
7 dnl AC_HAVE_DECLARATION(includes, variable)
8 AC_DEFUN([AC_CHECK_DECLARATION], [
9 AC_MSG_CHECKING([if $2 is properly declared])
10 AC_CACHE_VAL(ac_cv_var_$2_declaration, [
12 extern struct { int foo; } $2;],
14 eval "ac_cv_var_$2_declaration=no",
15 eval "ac_cv_var_$2_declaration=yes")
18 define(foo, [HAVE_]translit($2, [a-z], [A-Z])[_DECLARATION])
20 AC_MSG_RESULT($ac_cv_var_$2_declaration)
21 if eval "test \"\$ac_cv_var_$2_declaration\" = yes"; then
22 AC_DEFINE(foo, 1, [define if your system declares $2])