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[PATCH] solve my libtool 1.5 tag woes in CVS libtool

From: Paolo Bonzini
Subject: [PATCH] solve my libtool 1.5 tag woes in CVS libtool
Date: Mon, 17 Nov 2003 11:45:26 +0100
User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.5) Gecko/20031024 Debian/1.5-2

This patch (relative to CVS libtool) provides a macro to define a tag based on an existing one. This is necessary for compatibility, because it won't break if addition _LT_AC_TAGVAR's are defined. Compared to my previous solution of redefining AC_LIBTOOL_CONFIG temporarily and invoking the standard AC_LIBTOOL_LANG_*_CONFIG this has several advantages:
- it does not execute the tests twice
- it saves more than 100kb in the configure script
- you can define tags based on previously defined custom tags
- actually, the other approach also had to copy some _LT_AC_TAGVAR's manually (notably, compiler and CC)


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