On Thu, Aug 09, 2007 at 04:58:18PM -0700, Martin Chaney wrote: > Hi, > > I've been working on a version of the gcc compiler for the PDP10 > architecture for some while now and since it's approaching the stage of > being generally usable, my managers and I have agreed that it's time to > make its existence known. ^^^^^^^^^^^^^^^^^^^^^^^^^ URL? ;-) > It may be a good while before things are at a > state where my changes can be folded back into the general development > tree, Please see <URL:http://gcc.gnu.org/develop.html>. GCC is currently in stage 2. Stage 3 begins in a month and is scheduled to last two months before it returns to stage 1 for two months. It would therefore be ideal if you're ready to submit the changes in about 3-4 months time. However, don't let that stop you from submitting patches for review even during stage 3. > but I'd like to start laying the groundwork for that eventuality > and discussing with the relevant folks how best to capture the PDP10 > dependencies so that my customizations can be limited to the expected > places. The gcc mailing list is the place for that, except that actual patches go to gcc-patches. > The PDP10 is an unusual architecture in many respects and to > get the compiler to function has required customization through much of > the code that would normally be considered machine independent. It's the one with 36-bit words, isn't it? Let the fun begin. :-) > My port is currently based on the GCC4.1.1 distribution. There are a > handful of testsuite tests that fail that I hope to debug before rolling > forward to the 4.2.1 release. Expect broken testsuite tests which can't pass unless "int" is exactly 32 bits. I've fixed several to work on 16-bit targets and I'd be surpriced if you don't run into "issues" on the PDP10. > My experience so far has been that > advancing the base version can cause significant problems and of course > one goal of folding my changes back into the base is to alleviate this > problem. For this reason, I suggest you sync up to mainline as soon as possible. You'll have to do so anyway before you submit pathes for the PDP10. A new dataflow implementation was merged into mainline during stage 1 and you should have a look at <URL:http://gcc.gnu.org/wiki/DataflowPorting> when you run into problems. -- Rask Ingemann Lambertsen
