Re: A simplification of _AC_CANONICAL_SPLIT

[Paul Eggert]

Stepan Kasal <address@hidden> writes:

> +[case $ac_cv_$1 in
> +  [[!-]]*-*-*) ;;
> +  *) AC_MSG_ERROR([non-canonical value of ac_cv_$1: $ac_cv_$1]);;
> +esac

Sorry, I don't understand what that pattern is trying to do.  Does it
really catch all non-canonical values?  Or even common problems?  If
not, then I wouldn't bother.  Also, the [!-] doesn't look portable to
me.