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Re: [PATCH] Support official versions.

On Thu, 11 Nov 2010, Jack Howarth wrote:

> On Thu, Nov 11, 2010 at 06:41:03PM -0500, Jack Howarth wrote:
> > 
> > Sebastian,
> >    Do these new changes require cloog-ppl 0.15.10 rather than 0.15.9? I am
> > finding the the x86_64-apple-darwin bootstrap fails with...
> > 
> > checking for version 0.10 (or later revision) of PPL... yes
> > checking for installed CLooG... no
> > configure: error: Unable to find a usable CLooG. See config.log for details.
> > ### execution of /var/tmp/tmp.1.UpSRyE failed, exit code 1
> > 
> Sebastian,
>    I finally caught on that the recent check-ins completely depreciate the use
> of cloog-ppl. It would be nice if the configure error message alerted the user
> to that fact. Installed cloog-org from the git using the recommended commands...

If the configure changes have the effect of deprecating something or 
adjusting the required versions of something, there is a serious problem 
and they should not have been approved: the documentation of prerequisites 
in install.texi does not appear to have been changed and it still 
specifies CLooG-PPL.  It is not acceptable to change the prerequisites 
without including the documentation changes in the same commit.

> Is there any documentation on how to build cloog-ppl from the git?
> Also what will be the recommended build configuration for gcc's graphite support
> in gcc 4.6? Will it be ppl 0.11 and cloog-isl or cloog-ppl?

Regarding recommended configurations the same principle as before still 
applies: the version of GCC and the configure options should determine the 
code generated, so given any particular configure options it should not 
accept different CLooG variants that may cause GCC to generate different 
code, it should accept only the recommended version unless 
sanity-check-disabling options such as --disable-cloog-version-check are 

Joseph S. Myers

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