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From: | Paul Eggert |
Subject: | Re: A simplification of _AC_CANONICAL_SPLIT |
Date: | Mon, 22 Aug 2005 15:21:36 -0700 |
User-agent: | Gnus/5.1007 (Gnus v5.10.7) Emacs/21.4 (gnu/linux) |
Stepan Kasal <address@hidden> writes: > +case $ac_cv_$1 in > + -*) false ;; > + *-*-*) : ;; > + *) false ;; > +esac || AC_MSG_ERROR([invalid value of canonical $1]) Sorry, I still don't get it. Why is that first "false" needed? Why is it important to check for an empty cpu, but not for an empty vendor or os? Can't it be written this way instead? case $ac_cv_$1 in *-*-*) ;; *) AC_MSG_ERROR([invalid value of canonical $1]) ;; esac
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