- ghc-devs - Haskell.org

Naming of HEq_sc
by Matthew Pickering 29 Dec '17

29 Dec '17

Hi all, Does anyone know why the *record selector* `HEq_sc` started with a capital letter? Would it be sensible to rename it to start with a lower case letter and perhaps mention that it is a selector in the name? git grep "HEq_sc" doesn't yield any explanation, I could only work this out from reading the source doe. I propose "heq_sel" could be more self-explanatory. Cheers, Matt

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validate failure on Mac OSX for ghc head (validate fails with clang)
by Carter Schonwald 29 Dec '17

29 Dec '17

hey All, the current settings for warnings etc for ghc validate do not work on mac, this is because some gcc flag isn't in clang, or vice versa, or some version of gcc related matter the relevant error is: error: unknown warning option '-Werror=unused-but-set-variable'; did you mean '-Werror=unused-const-variable'? [-Werror,-Wunknown-warning-option] the culprit seems to be apple clang, at least if my reading of the config output by validate is correct Configure completed successfully. Building GHC version : 8.5.20171223 Git commit id : d7d0aa316f9d23d73ae617e0cc1b147907667ef4 Build platform : x86_64-apple-darwin Host platform : x86_64-apple-darwin Target platform : x86_64-apple-darwin Bootstrapping using : /Users/carter/.install-ghc/ghc-8.2.2-hq/bin/ghc which is version : 8.2.2 Using (for bootstrapping) : /usr/bin/clang Using gcc : /usr/local/bin/gcc-7 which is version : 7.2.0 Building a cross compiler : NO Unregisterised : NO hs-cpp : /usr/local/bin/gcc-7 hs-cpp-flags : -E -undef -traditional there seem to be several take aways: 1) clang doesn't support unused-but-set-variable 1.5) no one has run validate on OSX in the past few months with a vanilla checkout / env? 2) how do i change the compiler selected for boot strapping, whether via env variables or other twiddles thanks! -Carter

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RE: Haskell Platform 8.2.2 - virus?
by Gershom B 28 Dec '17

28 Dec '17

Note that HitmanPro has caused plenty of problems with GHC in the past, and should be avoided by Haskell devs: https://www.reddit.com/r/haskell/comments/77from/gettting_segmentation_faul… https://github.com/commercialhaskell/intero/issues/436

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Haskell Platform 8.2.2 - virus?
by Matthew Lamari 28 Dec '17

28 Dec '17

New Haskell install was tripping my Bitdefender like crazy and in weird ways - not new as that's how bitdefender rolls. However, I retested in a clean test, with (free) Hitman Pro I started from a base case with 2 clean windows 8 VMs. New 8.2.2 install - has virus Old 8.0.2 Jan 2017 - no virus According to Hitman Pro, touchy.exe, haddock-8.2.2, ghc-8.2.2.exe, and unlit.exe have some problem post-install. I went no further on the VMs. "Detection Names Kaspersky Trojan-Downloader.Win32.Paph.fsv " Bitdefender didn't get it on install but would lock the whole thing down on the first run of "Cabal".

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How do I build basic GHC packages with -fPIC?
by Viacheslav Lotsmanov 28 Dec '17

28 Dec '17

Hi there. My actual main goal is to build my own shared library written in Haskell that would be compatible with application written in C even without knowing that is is written in Haskell. So for now I compiled my shared library but I only could dynamically link it to Haskell dependencies such as "base" and "ghc-prim" packages. But I want to statically link Haskell dependencies but I realized it isn't simple and straightforward task. On Freenode's #haskell I was advised I should build GHC from scratch with -fPIC, on the Linux (I'm using Fedora Workstation 25 on x86_64) I couldn't go forward without this step. So I wrote some Dockerfile based on Debian 9, skipping first part which is containing 'apt-get update' and installing 'build-essential' here is what I have: COPY my-build.mk /my-build.mk RUN mkdir /compile && cd /compile \ && wget https://downloads.haskell.org/~ghc/8.2.2/ghc-8.2.2-src.tar.xz \ && tar -xvf ghc-8.2.2-src.tar.xz \ && rm ghc-8.2.2-src.tar.xz \ && cd ghc-8.2.2/ \ && ./configure --prefix=/ghc-8.2.2-fpic --disable-library-profiling --enable-shared \ && cp /my-build.mk mk/build.mk \ && make install \ && cd /usr/local/bin \ && ls /ghc-8.2.2-fpic/bin/ | xargs -I{} ln -s /ghc-8.2.2-fpic/bin/{} And as you can see I just use my own prepared /my-build.mk/ file which is: SRC_HC_OPTS = -H64m -O EXTRA_HC_OPTS = -fPIC SRC_CC_OPTS = -fPIC -O GhcStage1HcOpts = -fasm -O0 GhcStage2HcOpts = -fasm -O0 GhcLibHcOpts = -fasm -O2 GhcLibWays = v dyn DYNAMIC_GHC_PROGRAMS = YES DYNAMIC_BY_DEFAULT = NO SplitObjs = NO HADDOCK_DOCS = NO BUILD_DOCBOOK_HTML = NO BUILD_DOCBOOK_PS = NO BUILD_DOCBOOK_PDF = NO V = 1 LATEX_DOCS = NO HSCOLOUR_SRCS = NO BeConservative = YES I just combined it from parts I found in the internet during searching answers to my questions. So I built this container, I also installed dependencies by this commands: cd /mnt cabal update cabal sandbox init cabal install --enable-shared --ghc-option=-fPIC happy alex cabal install --enable-shared --ghc-option=-fPIC base-unicode-symbols filepath process directory lens containers qm-interpolated-string And when I tried to build my app by following commands (first command compiles some C-code to automatically initialize Haskell runtime, see link posted below, not sure if /-static/, /-shared/ or /-fPIC/ means something here but it's work in progress): ghc -static -shared -fPIC -optc-DMODULE=Foo src/lib-autoinit.c -outputdir builddir ghc -package-db=SOME_CABALS_SANDBOX_PKGDB_DIR --make-static-shared-fPIC src/Foo.hs builddir/src/lib-autoinit.o -o builddir/libfoo.o -isrc -outputdir builddir -Wall -O2 I failed with a lot of similar errors like this one: /usr/bin/ld.gold: error: /ghc-8.2.2-fpic/lib/ghc-8.2.2/ghc-prim-0.5.1.1/libHSghc-prim-0.5.1.1.a(Classes.o): requires dynamic R_X86_64_PC32 reloc against 'stg_ap_0_fast' which may overflow at runtime; recompile with -fPIC What have I missed? What should I do to make this happen? Any progress could be found here (Dockerfile, sources of modules, build-scripts): https://github.com/unclechu/haskell-experiment-shared-library-for-c-applica… Related stack overflow issue: https://stackoverflow.com/questions/47978884/how-do-i-recompile-ghc-with-fp…

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答复: ghc-devs Digest, Vol 172, Issue 40
by BalterNotz 27 Dec '17

27 Dec '17

发送自 Windows 10 版邮件应用发件人: ghc-devs-request(a)haskell.org 发送时间: 2017年12月27日 20:32 主题: ghc-devs Digest, Vol 172, Issue 40

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CircleCI failed for me
by Richard Eisenberg 26 Dec '17

26 Dec '17

Hi devs, I've enabled CircleCI on my GitHub fork of GHC in order to get good validation results. This worked several months ago. But now, I see failures around performance tests: https://circleci.com/gh/goldfirere/ghc/12 <https://circleci.com/gh/goldfirere/ghc/12> This is a tiny patch on top of HEAD; I can't imagine my patch is at fault here. Does anyone know what settings I should look into to fix this? Thanks! Richard

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RE: Can't push to haddock
by Simon Peyton Jones 20 Dec '17

20 Dec '17

| It's for technical reasons, and the strongest one being: GitHub doesn't | allow us to establish strong invariants regarding submodule gitlink | referential integrity for submodules (which I implemented a couple years ago | for git.haskell.org) Interesting. It'd be good to document what the technical reasons are. For example I don’t know what the strong invariants are. A good place to describe them might be the Repositories pages https://ghc.haskell.org/trac/ghc/wiki/Repositories Many thanks Simon | -----Original Message----- | From: Herbert Valerio Riedel [mailto:hvriedel@gmail.com] | Sent: 18 December 2017 11:13 | To: Simon Peyton Jones <simonpj(a)microsoft.com> | Subject: Re: Can't push to haddock | | On Mon, Dec 18, 2017 at 10:01 AM, Simon Peyton Jones via ghc-devs <ghc- | devs(a)haskell.org> wrote: | > But why don’t we just pull from github rather than mirroring on | > git.haskell.org? | | It's for technical reasons, and the strongest one being: GitHub doesn't | allow us to establish strong invariants regarding submodule gitlink | referential integrity for submodules (which I implemented a couple years ago | for git.haskell.org)

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ghc-prim 0.5.1.1 not on Hackage
by Michael Snoyman 20 Dec '17

20 Dec '17

The Stackage issue tracker just received an issue about ghc-prim 0.5.1.1. https://github.com/fpco/stackage/issues/3115 This version of the package has not been uploaded to Hackage, so: * The Stackage snapshots refer to 0.5.1.1 * The stackage.org documentation shows version 0.5.1.1 * `stack unpack` and `cabal unpack` both fail on ghc-prim-0.5.1.1 Also, it appears that the GHC 8.2.2 release notes still refer to ghc-prim 0.5.1.0. I'm happy to file an issue for this, but last time this popped up it was unclear if the issue should be filed on GHC Trac or the Hackage Trustees issue tracker. Michael

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Re: Can't push to haddock
by Gershom B 20 Dec '17

20 Dec '17

> You're also assuming github doesn't suddenly pull a SourceForge (or a > Gitorious for that matter). Business cares not what it steamrolls in the > name of profit. > > I fail to understand why, with multiple examples of the folly of this > belief out there, people are still willing to bet on *this* company being > *different* from all others and absolutely safe to trust. What the heck is everyone arguing over? The initial statement was that even if we moved everything to github "We'd need mirroring anyway". That's it! There's no either/or involved. Just a statement that when you have data in one location, no matter how trustworthy, you want a backup as well. And ideally you want the backup under your control. We can debate moving anything anywhere all we want, but the idea that stuff should also be backed up, regardless, in a source not under third-party control, seems inoffensive and besides the point. --Gershom

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