-# Check if a variable is properly declared.
-# gt_CHECK_VAR_DECL(includes,variable)
-AC_DEFUN([gt_CHECK_VAR_DECL],
-[
- define([gt_cv_var], [gt_cv_var_]$2[_declaration])
- AC_MSG_CHECKING([if $2 is properly declared])
- AC_CACHE_VAL(gt_cv_var, [
- AC_TRY_COMPILE([$1
- extern struct { int foo; } $2;],
- [$2.foo = 1;],
- gt_cv_var=no,
- gt_cv_var=yes)])
- AC_MSG_RESULT($gt_cv_var)
- if test $gt_cv_var = yes; then
- AC_DEFINE([HAVE_]translit($2, [a-z], [A-Z])[_DECL], 1,
- [Define if you have the declaration of $2.])
- fi
-])
-