On Fri, Jul 22, 2011 at 10:57 AM, Tobias Grosser <tob...@grosser.es> wrote: > On 07/22/2011 10:08 AM, Richard Guenther wrote: >> >> On Fri, Jul 22, 2011 at 1:00 AM, Tobias Grosser<tob...@grosser.es> wrote: >>> >>> Hi, >>> >>> I propose to switch to the official cloog.org cloog version with isl >>> backend and >>> at the same time to remove support for both CLooG-PPL legacy as well as >>> CLooG-Parma. >>> >>> We want to switch to cloog-isl as it is the only officially maintained >>> version >>> of cloog. Furthermore, it provides features that will help to fix some >>> bugs in >>> the graphite code generation[1]. >>> The reason to abond CLooG-PPL (legacy version) is, that cloog-isl >>> provides the >>> new CloogInput library interface. This interface is not available the old >>> CLooG. >>> I plan to move graphite to this interface. As I do not see enough >>> benefits from >>> being able to use CLooG PPL, I decided to not introduce any compatibility >>> scheme, but just remove any code that is only needed for CLooG-PPL. >>> I also removed CLooG-Parma (cloog.org with PPL backend), as it is >>> currently not >>> actively maintained and not well tested. I believe our time is better >>> spent on >>> improving graphite or cloog isl, as in putting time into this cloog >>> version. >>> >>> So here we are: Moving graphite back to the official cloog.org version! >> >> Does that mean GCC no longer needs PPL? If it is like today (we are going >> to link against both ISL and PPL) then I am opposed to this change. > > No, this does not mean we do not need PPL anymore. Graphite itself still > uses PPL. This change only affects the version of CLooG used. > > This also means Graphite itself does for now not directly link to isl (at > least it it is not a static build), as isl is only used in CLooG itself. It > is also part of the official cloog-isl tar file, such that there is no need > to download and install yet another library. > > As you mentioned we may want to switch to use isl itself later, as it has > some advantages over PPL, however this might be evaluated in a separate > step.
Please, it would be highly desirable to get rid of that build dependency ... Btw, for interested people, I figured out how to build cloog so it links isl statically, export cloog_configure_args="--enable-static --disable-shared --with-pic" before configuring (yes, that will still build libcloog itself shared). Richard.
