On Sat, Apr 28, 2018 at 5:36 PM, Hrishikesh Kulkarni <hrishikeshpa...@gmail.com> wrote: > Hi, > > I have created a new file lto-dump.c and to test if it's linked > correctly, I have put a dummy function called dump which should simply > print hello world after passing -dump option to lto1. > > ~/gnu-toolchain/gcc/master/tests$ ../stage1-build/gcc/lto1 hello.o -fdump > > Now while adding -fdump option in lang.opt for command line option I > am getting error “unrecognised command line option '-fdump' ”. > So how should I proceed with adding this new option. > Please find the diff file attached.
+fdump +LTO Dump Tool +Call the dump function. + try fdump LTO Call the dump function. instead. The second line is magic flags that need to be recognized. You probably want instead LTO Var(flag_lto_dump) so you can test whether the flag is set or not as well. Sorry for the late response. Richard. > > Thanks, > > Hrishikesh > > On Wed, Apr 25, 2018 at 1:35 PM, Richard Biener > <richard.guent...@gmail.com> wrote: >> On Wed, Apr 25, 2018 at 5:17 AM, Hrishikesh Kulkarni >> <hrishikeshpa...@gmail.com> wrote: >>> Hi, >>> >>> Thanks a lot for giving me this wonderful opportunity to work with GCC >>> under your guidance and mentorship (GSOC 2018). >>> >>> Just a few starting queries >>> >>> 1. >>> >>> As a starting point to read lto-object file, is it sufficient to only >>> link with lto-object.c or shall I need other source files too ? >> >> You will need a lot more source files - starting with libbackend.a is >> probably easiest. As said during the initial project discussion it >> remains to be seen whether a fully standalone dump tool is >> best or whether the actual work is to be done by lto1 and the dump >> tool shall act merely as a driver around that and they communicate >> via some special (set of) options to lto1. >> >> IIRC we do not have any existing tool that builds trees or cgraph >> nodes or reads gimple bodies, so picking pices that are required >> is going to be "interesting" (and eventually will suggest some refactoring >> to avoid pulling in unnecessary stuff). You'll also run into issues >> expecting >> some initialized global state. So... >> >> ...for the first phase of experimenting with the code-base it's probably >> easiest to add some testing option to gcc/lto/lang.opt and "do stuff" >> within a if (flag_your_option) conditional from some point in >> lto/lto.c:lto_main. >> >>> 2. >>> >>> Should the dump tool be under gcc or lto dir? Would I need to modify >>> only gcc/Makefile.in to add entry for building the dump tool or any other >>> Makefiles too ? >> >> I'd say it most naturally would reside in gcc/lto/ and thus its Make-lang.in >> would need to be adjusted. >> >>> >>> Also, I would proceed with copyright assignment as soon as I will receive >>> the mentioned forms. >>> >>> >>> Thanks, >>> >>> Hrishikesh >>> >>> >>> On Tue, Apr 24, 2018 at 6:27 PM, Martin Jambor <mjam...@suse.cz> wrote: >>> >>>> Hello, >>>> >>>> I am pleased to announce that Hrishikesh Kulkarni will be working on >>>> "Textual Representation of LTO Object Files (Textual LTO dump tool >>>> project)" as his Google Summer of Code 2018 project. I believe I write >>>> on behalf of everybody in the GCC community when I congratulate him and >>>> wish him success in the upcoming work. Hrishikesh's mentors are Martin >>>> Liška and Jan Hubička, but the plan is to have most of the conversation >>>> about the project on the mailing list and so I would like to encourage >>>> everyone to help him out here if they can. >>>> >>>> According to the schedule of GSoC, we have entered "Community Bonding >>>> period" which lasts until May 14th (when the first out of three "coding" >>>> periods begin). Hrishikesh, Martin and Honza will take over from me in >>>> suggesting what technical things you should study/play with, but I'd >>>> like to request that you make sure you get an FSF copyright assignment >>>> quickly (see https://gcc.gnu.org/contribute.html#legal). David, I >>>> assume that Hrishikesh does not have the assignment yet, can you please >>>> send him the necessary forms? Hrishikesh, please fill them is when you >>>> get and send them to FSF. If at any moment it will appear that the >>>> process got stuck, please let me know sooner rather than later. >>>> >>>> On a general note, GCC was given two student slots which we requested >>>> after receiving two high-quality student proposals. Unfortunately, >>>> Sebastiaan has withdrawn from GSoC 2018 before selection was announced >>>> and so we "only" have one student this year. >>>> >>>> I'm looking forward to the new tool, >>>> >>>> Martin >>>>
