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regsiter_tm_clones in crtbegin.o

From: "Joey Ye" <joey dot ye at arm dot com>
To: <gcc at gcc dot gnu dot org>
Date: Fri, 27 Jul 2012 15:23:59 +0800
Subject: regsiter_tm_clones in crtbegin.o

Since 4.7 register_tm_clones and deregister_tm_clones are added in
crtbegin.o. Built for ARM they eat 80 precious bytes of flash for each
application. They seem to be for transaction memory only and my build
doesn't need it.

I can simple disable them by -DUSE_TM_CLONE_REGISTERY=0 in a tmake_file. But
I'm not sure if I should put it just under config/arm, or make it more
general under config.

Anybody else share same problem?

Thanks - Joey

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