Hi, Sandro. On Wednesday, 10 January 2018 at 14:58, Sandro Mani wrote: > I've received a request to package a version of scotch with 64bit integers > (as opposed to 32bit). I suppose the details are less important, the bottom > line is > > scotch 32bit: typedef int32_t SCOTCH_Num; > > scotch 64bit: typedef int64_t SCOTCH_Num; > > where SCOTCH_Num affects the public ABI and is used by third parties which > use scotch. > > > Upstream allows selecting the integer size at compile-time (i.e. passing > -DINTSIZE64 for int64_t). However, this choice has no effect on the library > name, so vanilla upstream will build a library named libscotch.so regardless > of how you configure it. Why don't you talk to upstream about this. Having the two builds parallel-installable would be a benefit for everyone. Please take a look at what we did in openblas and arpack (https://github.com/opencollab/arpack-ng/issues/30) Hopefully that will convince upstream to support library name suffixing. > I'm skeptical whether introducing a downstream scotch64 package with i.e. > libscotch64.so is a good solution, given that possibly no build system of > third-party software using scotch knows about libscotch64.so and would need > to be carefully patched (i.e. to not mix parts using libscotch and those > using libscotch64). Also, introducing downstream specific suffixes is never > a good idea. In general yes, but in this domain it's a common trend (openblas and arpack are doing it already). > The alternative would be to just switch the main scotch package to 64bit > integers, but this may be undesirable for memory-bound applications which > rely on the smaller memory-usage of 32bit integers. Type incompatibility (narrowing) could also be an issue. > I'm not really sure whether there is a good solution, happy to hear > opinions. I'd open a discussion with upstream to see where it goes. Regards, Dominik -- Fedora https://getfedora.org | RPMFusion http://rpmfusion.org There should be a science of discontent. People need hard times and oppression to develop psychic muscles. -- from "Collected Sayings of Muad'Dib" by the Princess Irulan _______________________________________________ devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx
