<g-w1>
it seems like the function is called in a comptime context which kinda makes sense
<g-w1>
but also doesn't at the same time
<g-w1>
i feel like functions that return types shouldn't automatically be comptime
<andrewrk>
you're trying to store 0x01 in the address 0x01 at compile time
<g-w1>
yes, that is an example to show that it is not runtime
<andrewrk>
did you mean to return a struct instance and not the struct type?
<g-w1>
basically, make a struct and init it at the same time
<g-w1>
nah, this is for embedded stuff
<g-w1>
actually that might work
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<v0idifyy>
why is there readUntilDelimiterAlloc and readUntilDelimiterOrEof but no readUntilDelimiter?
<g-w1>
i was thinking that exact same thing a few days ago!
<hspak>
Possible the problem is PEBKAC, but the latest master zig tarball seems to be missing `std.mem.containsAtLeast` somehow? I'm seeing: https://zigbin.io/9887a6
<g-w1>
what is PEBKAC?
<hspak>
> Short for problem exists between keyboard and chair
<hspak>
Ah yup, you're right. Problem was definitely me - I probably didn't realize I already had a ~/zig dir and when I extracted the new tarball there, some lingering over files that didn't get overwritten probably messed it up
<hspak>
All good now!
<g-w1>
imo zig should be better at detecting stuff like this
<g-w1>
maybe it should put a file with its version in the lib dir, then check if its version matches it?
<g-w1>
ah, this wouldn't solve it anyways
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<yxprogramming>
hello, everyone! I recently started a project that requires linking a static library to the final project. Using linkSystemLibrary doesn't work because that appears to look for system libraries rather than relative paths from the project directory. I looked through the LibExeObjStep and didn't notice anything that could accomplish this. Does anyone know a way to do this? Thanks in advance!
<g-w1>
exe.addObjectFile iirc
<yxprogramming>
okay, thank you, that seems to have done the trick! I saw that function browing through the source earlier, but didn't make the connection
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<wilsonk>
anybody else having trouble building llvm-12? I have followed the same procedure as the last 90-ish times I have built it, but now I get this error: "llvm-12.0.0.src/tools/lld-12.0.0.src/MachO/UnwindInfoSection.h:15:10: fatal error: mach-o/compact_unwind_encoding.h' file not found"
<wilsonk>
Anybody else?
<wilsonk>
I grabbed libunwind and unpacked it in the runtimes dir, since that file seems to be libunwind specific...no joy
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<wilsonk>
Thankfully I have this 64-core system that only takes 9 mins to build LLVM/clang/lld or I would be even more pissed! Can't imagine waiting 3 hours only to find out LLVM can't get their shit together enough to guarantee a build for a new release!! So anyways...
<mikdusan>
known issue with lld
<mikdusan>
one sec
<wilsonk>
I got it figured out...
<wilsonk>
if you copy over the Unwind file from runtimes/libunwind/include/mach-o to the lld include directory (make a mach-o subdir first) then things build fine
<wilsonk>
Shouldn't they be able to fix this in a tenth of a second over there instead of pissing off VERY long time users!?!??!?! UGH
<wilsonk>
It's not like I am on an exotic system or doing anything even remotely out of the ordinary... rant over!
<wilsonk>
mikdusan, did you happen to find an issue for this? Or something in a search? I couldn't find any info on this silliness
<mikdusan>
it's labeled against a standalone build of lld. so I'm not sure why people are hitting the bug. I managed to build llvm12 "my way" without issue (llvm-project, and subprojects of choice all at once)
<mikdusan>
I know andrew hit it (I think with zig-bootstrap) but that does a lot more things. like disables some LLVM tools during build. might be key that "llvm-config" is not built in one of it's stages and triggers this lld bug? i dunno
<mikdusan>
but way to volatile. lld is like an outcast. it's CMakeFiles and targets are really odd compared to the rest of llvm-projects
<wilsonk>
Thanks for that. At least I know I am not alone :) Strange that it comes up for me without a standalone build or doing anything exotic
<wilsonk>
The only difference from the build instructions on the zig wiki is that I unpack clang/lld in the tools directory of llvm and they get picked up automatically during the llvm build...usually easy-peasy
<semarie>
here build of zig-bootstrap was fine (on openbsd)
<wilsonk>
brb
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<wilsonk>
wow, on a roll...reboot to update win10 and it fails twice! Snake-bitten tonight! I think I will leave off updating my business VM's, just in case...
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<RadekCh>
Good morning guys! I was asking this yesterday evening but nobody has responded. What I have problem with is building stage1 compiler. I'm getting the following errors: https://zigbin.io/af9b33
<RadekCh>
The problems are related to "missing" enums, but the source code of zig does contain them
<RadekCh>
the problem is that for example tartet.zig is taken from the zig that is installed on my host
<RadekCh>
so zig compilation of stage1 is not using the proper source code, do You know how can I overcome this?
<xackus>
I've never used this option, maybe someone else can help
<RadekCh>
ok, no worries, thanks for help anyway
<RadekCh>
btw. are most people in Americas', Europe's or Asian time-zone? (so that I would know when to be active here :))
<xackus>
mostly eu, na I think
<xackus>
you can try discord too
<RadekCh>
thx
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<RadekCh>
Arghhh, found the cause. I had cached output from previous zig run in ~/.cach/zig <- it was causing zig compiler confustion
<RadekCh>
ummm, no, it actually failed in the same place
<dch>
I tried bringing up latest zig on FreeBSD for ports, using devel/llvm12 which is 12.0.0.rc4 now
<dch>
I was surprised to see zig compiler wants libxml (huh but whatever) and I'm seeing
<dch>
ld: error: undefined symbol: lzma_properties_decode >>> referenced by xzlib.o:(xz_make) in archive /usr/local/lib/libxml2.a
<dch>
which seems odd
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<TheLemonMan>
it's a transitive dependency, I guess it's llvm that needs libxml
<dch>
TheLemonMan: I'm not building llvm, does zig need to somehow pull these in as well?
<TheLemonMan>
yeah, check out the CMakeLists.txt file
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<RadekCh>
ok, I think I get it now, the problem was that I was building zig source code with zig installed on the host and not zig built by zig-bootstrap, now I'm using:
<RadekCh>
zig...The following command exited with error code 1:
<RadekCh>
Am I referencing the correct directories from zig-bootstrap? It seems as if this problem was due to llvm in zig-bootstrap/out/native-linux-gnu-baseline/ not being built using zig cc
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<RadekCh>
ok, next try: copy current zig source code to zig-bootstrap/zig, compile zig-bootstrap again and then use this output zig to compile stage1 with the corresponding zig source code
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<koakuma>
andrewrk: Sorry for the late reply, but I tried to comment the libunwind lines in the file you pointed earlier, but it seems that stage2 build will still try to build it?
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<RadekCh>
Can someone please explain to me if zig has two stage1 compilers? It seems that there is one stage1 zig compiler built from c++ and a second one built from zig source code. Is this correct?
<RadekCh>
Then maybe a stage0 would be an appropriate name for the c++ version
<RadekCh>
it would reduce confusion in my opinion
<RadekCh>
(unless this is not the case)
<Nypsie>
There's only 1 stage1 compiler. There's zig0 (which contains a very small subset for Zig), which is used to build the final zig compiler.
<Nypsie>
The easiest way to get Zig is by downloading the master binaries from the ziglang website. You can also build from source. Lastly, there's zig-bootstrap which will build Zig from the most minimal setup into a final Zig compiler. But you don't really need to do this unless you're into that.
<RadekCh>
what is zig-bootstrap building then?
<Nypsie>
It first builds a zig compiler from llvm, clang etc. It then uses 'zig cc' to build llvm, clang etc and uses the output of those to build a static zig binary iirc.
<Nypsie>
It's a lot easier to use system llvm, ld & clang and use those to build Zig from source
<RadekCh>
ok, thanks for the info
<RadekCh>
one thing bother me though, in zig-bootstrap there is a patched version of LLVM, will the stock binary version of LLVM also be able to build zig-stage1 from zig repository?
<RadekCh>
1) It should point that only zig in zig-bootstrap/out/zig-.. should be used to build from zig repository
<RadekCh>
2) In my case zig-bootstrap/zig needed to be a exact copy of zig repository I wanted to built
<RadekCh>
3) It then says to type in 'cmake ..', but we should first do 'mkdir build; cd build' and only then cmake ..
<RadekCh>
4) In case I don't have LLVM 12.x installed on the system how could I specify the LLVM binaries built in zig-bootstrap or other way if I just want to write
<RadekCh>
make install, do I really need LLVM for this?
<RadekCh>
there should be a way to omit this step I think
<RadekCh>
Can someone change this in the wiki?
<Nypsie>
llvm12 was only just merged into Zig master so some of the steps are still being fleshed out/corrected
<Nypsie>
(Note that the readme of zig-bootstrap does tell you to get the latest zig that you want to build)
<Nypsie>
zig-bootstrap also comes with llvm itself
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<Nypsie>
Not sure which step needs to be omitted?
<Nypsie>
Note that the goal of zig-bootstrap is "The purpose of this project is to start with minimum system dependencies and end with a fully operational Zig compiler for any target."
<Nypsie>
So the steps it contains are not optional
<RadekCh>
yes, this is correct, it does said that "A previous build of Zig, 0.7.0+a01d55e80 or newer." but to me it sounds like some latest released binary, and not the one I want to built
<RadekCh>
I mean that in Option B, do I need to have LLVM 12.x installed in order to type 'make install'?
<RadekCh>
looking at CMakeLists.txt it seems that it's always checking for LLVM
<RadekCh>
regardless of the build type
<RadekCh>
which is probably ok, but would be nice to specify the LLVM from zig-bootstrap
<Nypsie>
In case of option B, you need to have LLVM built using Zig
<RadekCh>
yes, and how do I install it on the host?
<RadekCh>
or use it "in-place" for cmake in zig?
<Nypsie>
Those steps are explained in the zig-bootstrap README that is linked at Option B
<Nypsie>
Using -DCMAKE_PREFIX_PATH=<path> you can specify where the libraries are located
<RadekCh>
ah, ok. Than can this be made more transparent in the wiki? And linked in "Option B" section?
<Nypsie>
It's in the Option A section
<RadekCh>
yes, but Option A / Option B sounds to me as "either or" and not "Option B needs part of Option A". So that the sections are self-contained
<RadekCh>
it would be clearer this way
<Nypsie>
They are self-contained
<Nypsie>
It is either option A, or option B
<RadekCh>
I have the feeling we are not understanding each other, but fine. Thank You for help anyway!
<Nypsie>
Note that what I linked only works for option A
<Nypsie>
Option B requires you to build LLVM using an existing Zig compiler. (Where zig-bootstrap is the easiest way to get this version of LLVM)
<RadekCh>
and exactly I want to use Option B, and unfortunately the steps provided there are not working when "copy-and-pasting" them from wiki. Some other work needs to be done that is documented elsewhere. This is my point.
<Nypsie>
Yes, but it links you to that documentation
<RadekCh>
But I guess only few venture this way so probably no need to update this section
<Nypsie>
If it's incorrect, it certainly should be updated. Don't get me wrong.
<RadekCh>
it's not mentioning how exactly to use binaries from zig-bootstrap. So that LLVM, LLD and CLANG should not only be built but also installed on the host (even in local directory) and that the zig-stage1 compiler should be used. Instead the command 'zig build' gives an impression that some other binary installed on the system should be used.
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<RadekCh>
I need to log out. I'll try to reproduce steps to build everything from scratch over the weekend and hopefully give some concrete steps to be added to the wiki page.
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<RadekCh>
Thanks for conversations! Bye!
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<nefix>
Hello! I asked the same question yesterday, so if it's not appropiate please tell me! I'm trying to learn Zig and coming from a Go background. I was wondering how can I create interfaces? Or if it's not the correct way of thinking and what should I do instead. Thanks! :)
<Nypsie>
You can also look at the approaches std.io.Reader and std.mem.Allocator have taken (runtime vs static dispatch)
<nefix>
marler8997: I haven't understood a thing of what I've just read xD
<Nypsie>
In short: There's no language support like the way Go has
<nefix>
and are there workarounds? Like defining a function that returns a struct with typechecks or something like that?
<Nypsie>
See the link I gave you and the source of std.io.Reader & std.mem.Allocator
<Nypsie>
I'm not really good at explaining how it works I'm afraid, sorry.
<marler8997>
we might be able to help more if you show us some code
<nefix>
hmm, so I'm not sure to understand the different approaches between std.mem.Allocator and std.io.Reader. I've found the @hasDecl function, maybe something like this but type-checking and returning a compile error if not?
<nefix>
If you could review my code i'd be really grateful
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<plumm>
nefix may I ask what the point of this is? Could be ying here, (also, a bit off that you use a local variable instead of checking the type using typeinfo
<nefix>
plumm: could you provide an example on how to use it? I'm not getting it
<plumm>
@TypeInfo(@typeOf(T.id))
<plumm>
that returns a union you can then check the data on iirc
<plumm>
could you give me a more real world example of what you intend to use interfaces for? I think the paradigm zig has is a bit different, and while I think you're on the right track, i'm not sure it will be useful down the line (you invert T and the overlay so that overlay appears first, but the T methods aren't available from the returned struct
<nefix>
I'm trying to implement a protocol that has different transports
<nefix>
There's an interface for transport, and then each transport has its own implementation
<nefix>
I'm probably thinking it wrongly though?
<plumm>
I don't think zig has a pretty solution for this just yet tho lol
<nefix>
That's why I'm doing this "hack" xD
<plumm>
I think what you want to follow is the allocator pattern
<plumm>
because with readers you can't switch them out or provide different ones at runtime
<nefix>
I wasn't able to understand how it works
<plumm>
I'mm not even sure if the way it works is what andrew wants, because i think it uses fieldParentPtr
<plumm>
nefix the allocator pattern is just replacing the common methods with specialized functions
<plumm>
thats why you pass around different specialized instances of allocator, e.g var arena = std.heap.ArenaAllocator.init(inner_allocator); var alocator = &arena.allocator;
<nefix>
oh, I kinda understand it now
<nefix>
And I guess this is better than what I was trying to do, right?
<plumm>
I can't say for sure tbqh
<plumm>
but this is one pattern thats widely used throughout all zig projects and std and "just works"
<plumm>
what you wrote may have use for your own project, the only way to find out is to just use it and see
<nefix>
I'll try to implement it with this pattern and then compare both approaches
<nefix>
I have to go now, many thanks! :)
<plumm>
have a good day
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<plumm>
does anyone know jakubs irc nick here
<Nypsie>
plumm: I believe he's only on Discord, not irc.
<plumm>
womp
<ifreund>
he's popped up here occasionally with the nick kubkon
<andrewrk>
I would recommend putting all your c includes in the same @cImport and name it as `c` because xcb will already have its own prefix in the global c namespace. more details: https://ziglang.org/documentation/master/#cImport
<g-w1>
afk, also use -lc or exe.linkLibC();
<g-w1>
because xcb depends on the c stdlib
<andrewrk>
I noticed that people still do not know what to do even after seeing "compilation does not link against libc" - perhaps we need a stronger hint
<g-w1>
yes, maybe just say do `-lc or exe.linkLibC()` ?
<afk>
Thanks g-w1, that along with changing it to xcb/xcb.h instead of just xcb fixed it.
<g-w1>
andrewrk: after a few weeks, I am trying to get back to my rpi0 os, so I have filed this bug with zig not being able to build the boot.S file for it https://github.com/ziglang/zig/issues/8550
<marler8997>
g-w1, is it on github? link?
<g-w1>
the boot.S file is in the issue
<andrewrk>
g-w1, if you want to help with the fix, the next steps are (1) determine what command line is being passed to clang (2) determine what flags need to be added/removed/changed to make it correct
<marler8997>
oh it's just the boot.S file so far, nothing else?
<marler8997>
that blx instruction issue looks very similar, I think I was getting blx instruction errors when compiling for the gameboy advance arm7 chip
<g-w1>
ill try updating that part of the Compilation.zig :)
<andrewrk>
look up in that function for target.cpu.model.llvm_name. I suggest to copy paste that block into the asm switch prong and modify it to emit an -mcpu arg
<g-w1>
ok
<g-w1>
yo if this works, zig will be a better cross-assembler than system clang on nixos!
<g-w1>
for 8516 is the language change part the fact that all decls will be astgened, not just parsed? so if there is some missing identifier in a function that is not used, it is still analyzed up to astgen?
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<andrewrk>
that's correct
<g-w1>
that is nice
<andrewrk>
it also lets us have errors for unused functions
<andrewrk>
this will be controversial but I will strong arm it through