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Re: __ffssi2 not exported in libgcc_s.so

From: Andreas Krebbel <Andreas dot Krebbel at de dot ibm dot com>
To: Richard Sandiford <richard at codesourcery dot com>
Cc: gcc at gcc dot gnu dot org
Date: Thu, 3 May 2007 14:59:25 +0200
Subject: Re: __ffssi2 not exported in libgcc_s.so
References: <20070502145252.GA31032@blc4eb430604175.ibm.com> <87ejlyupre.fsf@firetop.home>

> To answer that, I'm afraid my patch is to blame:
> 
> 2007-04-24  Richard Sandiford  <richard@codesourcery.com>
> 
> 	* optabs.c (set_conv_libfunc): Prefer libgcc2's __ffsMM2 functions
> 	over an external ffs function.
> 
> We used to use ffs to implement __builtin_ffs if sizeof (int),
> even if libgcc provided a suitable alternative.  This broke targets
> whose C libraries don't provide their own ffs.
> 
> __ffssi2 was effectively dead code on many targets until now.
Thanks for the info.  So it should be safe to add it as GCC_4.3.0 only
symbol.

Bye,

-Andreas-

References:
- __ffssi2 not exported in libgcc_s.so
  - From: Andreas Krebbel
- Re: __ffssi2 not exported in libgcc_s.so
  - From: Richard Sandiford

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