!ayCRiZriCVtuCUpeLp:nixos.org

Nix Cross Compiling

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2 Aug 2021
@qyliss:fairydust.spaceAlyssa Rosswhat are you intending on running on this, then?08:00:13
@siraben:matrix.orgsiraben (he/him)literally just doing it to make it a cross target08:04:08
@siraben:matrix.orgsiraben (he/him)same motivation as MMIX08:04:14
@siraben:matrix.orgsiraben (he/him) * same motivation as MMIX, at most there's a simulator08:04:22
@qyliss:fairydust.spaceAlyssa Rosshmm, I'm not sure about adding cross targets that don't even have a realistic use case08:05:11
@qyliss:fairydust.spaceAlyssa Rossnot because I'm opposed to more cross targets, but just because it's too hard to know whether we've got it right08:05:23
@siraben:matrix.orgsiraben (he/him)they don't add load on hydra and encourage build diversity08:05:32
@qyliss:fairydust.spaceAlyssa Rossyou don't have to convince me that more cross targets in general are a good thing08:05:50
@siraben:matrix.orgsiraben (he/him)ok08:06:02
@siraben:matrix.orgsiraben (he/him)Yeah, getting it right is the hard bit08:06:06
@siraben:matrix.orgsiraben (he/him)I usually use GNU Hello as "good enough"08:06:11
@qyliss:fairydust.spaceAlyssa Rossbut in this case, where there's no software we can even build for this thing, there's no way for us to even test it08:06:14
@qyliss:fairydust.spaceAlyssa Rossso I don't think it really makes sense to have this particular target in Nixpkgs08:08:41
@siraben:matrix.orgsiraben (he/him)I see08:12:41
@siraben:matrix.orgsiraben (he/him)Closing, then.08:12:59
@qyliss:fairydust.spaceAlyssa RossIf you can figure out some way to test it (e.g. running a cross-compiled hello on an emulator running PDP-11 Unix), then please re-open :)08:18:22
@alexfmpe:matrix.orgalexfmpe John Ericson: any clue why gold is missing from binutils when targeting mingw? 20:07:45
@Ericson2314:matrix.orgJohn EricsonIt probably just didn't support it20:10:22
@Ericson2314:matrix.orgJohn EricsonBut I don't know20:10:25
@Ericson2314:matrix.orgJohn EricsonIt should be fine for neo20:10:30
@Ericson2314:matrix.orgJohn Ericson*now20:10:33
@sternenseemann:systemli.orgsterni (he/him) pkgsCross.mingwW64.stdenv.cc.bintools.bintools.configureFlags has --enable-gold in the configure flags at the very least 20:11:38
@sternenseemann:systemli.orgsterni (he/him)so I guess one needs to check the build output of bintools for that target to figure out what is going on20:11:54
@alexfmpe:matrix.orgalexfmpe
> ls $(nix-build -A pkgsCross.mingwW64.stdenv.cc.bintools.bintools)/bin
x86_64-w64-mingw32-addr2line  x86_64-w64-mingw32-c++filt  x86_64-w64-mingw32-elfedit  x86_64-w64-mingw32-ld.bfd   x86_64-w64-mingw32-objdump  x86_64-w64-mingw32-size     x86_64-w64-mingw32-windmc
x86_64-w64-mingw32-ar         x86_64-w64-mingw32-dlltool  x86_64-w64-mingw32-gprof    x86_64-w64-mingw32-nm       x86_64-w64-mingw32-ranlib   x86_64-w64-mingw32-strings  x86_64-w64-mingw32-windres
x86_64-w64-mingw32-as         x86_64-w64-mingw32-dllwrap  x86_64-w64-mingw32-ld       x86_64-w64-mingw32-objcopy  x86_64-w64-mingw32-readelf  x86_64-w64-mingw32-strip
20:12:58
@alexfmpe:matrix.orgalexfmpeno gold anywhere somehow20:13:10
@alexfmpe:matrix.orgalexfmpe
> ls $(nix-build -A pkgs.stdenv.cc.bintools.bintools)/bin
addr2line  ar  as  c++filt  dwp  elfedit  gprof  ld  ld.bfd  ld.gold  nm  objcopy  objdump  ranlib  readelf  size  strings  strip
20:13:29
@alexfmpe:matrix.orgalexfmpe dwp seems to also not exist in the mingwW64-targetting one 20:14:03
@alexfmpe:matrix.orgalexfmpe where's stuff like x86_64-w64-mingw32-dlltool coming from? 20:14:32
@sternenseemann:systemli.orgsterni (he/him)hm this is the build log for it but quick ctrl+f shows nothing interesting https://hydra.nixos.org/build/148559396/nixlog/120:16:52
@Ericson2314:matrix.orgJohn Ericson alexfmpe: gold probably just doesn't support PE (portable executable) as opposed to ELF which linux uses 20:41:07

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