- Glasgow-haskell-users

scoped tyvar
by Bulat Ziganshin 17 Oct '06

17 Oct '06

Hello glasgow-haskell-users, should the following work in 6.6? -- | Alloc the mutable byte vector having `elems` elements of required type allocUnboxed :: (STorIO m s, Integral elems, Unboxed a) => elems -> m (MUVec s a) allocUnboxed elems :: m (MUVec s a) = -- it's line 149 allocUnboxedBytes (fromIntegral elems * sizeOfUnboxed (undefined::a)) the problem is that it works in 6.6rc1, but user reports that his compiler (i think, 6.6 release) can't compile it saying: Data/Unboxed.hs:149:0: Parse error in pattern may be it's because september's changes in scoped tyvars handling? how i can convert this code retaining compatibility with Hugs? -- Best regards, Bulat mailto:Bulat.Ziganshin@gmail.com

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ghc for PC Solaris
by Christian Maeder 17 Oct '06

17 Oct '06

Hi, I would like to get ghc (version 6.6) working for our students. The machines are ATHLON-64 with Solaris 10. (SunOS 5.10 Generic_118855-19 i86pc i386 i86pc) If someone has a binary distribution of any ghc version (that is able to build ghc-6.6), please let me know. But I would also try to build ghc from hc-sources. What is the best platform I could get hc-sources from? We have sparc-sun-solaris2.10 and i686-pc-linux-gnu ourselves. In case that I have to port from another host platform as described in http://www.haskell.org/ghc/docs/6.6/html/building/sec-porting-ghc.html I've attached my generated target files from the "includes"-directory (with sources from the fresh ghc-6.6 release). Would someone create a "hc-file-bundle" on a more suitable host for me? Thanks for any help, Christian

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Timing Stats in ghci-6.6
by Daniel Fischer 17 Oct '06

17 Oct '06

Hi, apparently the timing doesn't work properly in ghci 6.6 (at least for me), I always get very small timings, usually 0.01 secs, sometimes 0.00 secs, once 0.07 secs, no matter how long it actually took. Is that a common problem or is it only me? Cheers, Daniel

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ghc-6.6 mac intel "binary bundle"
by Adam Megacz 17 Oct '06

17 Oct '06

Hi, I'm grateful to whoever prepared the binary bundle for ghc-6.6 on MacOS/Intel, but the instructions for installing it are missing/wrong. In particular, "make install" doesn't do much, and the only binary in the bundle called "ghc" appears to need additional configuration options (-B), so it seems to need some sort of installation procedure. The "INSTALL" file is not useful. Overall, I'm kind of uncertain exactly what this tarball contains. It looks like a "built" copy of the source code, but most of the source code is missing. It's not an installer (.mpkg) nor does it (apparently) contain any install scripts. Could you perhaps update this webpage with an example of the shell commands you might use to get it installed to the point where typing "ghc Foo.hs" works? http://www.haskell.org/ghc/download_ghc_66.html#macosxintel Thanks, - a -- PGP/GPG: 5C9F F366 C9CF 2145 E770 B1B8 EFB1 462D A146 C380

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Link errors when using the GHC API
by Bas van Dijk 17 Oct '06

17 Oct '06

Dear GHC hackers, I would like to experiment with the GHC API. However I get link errors when using it. For example: --------------------------------------------------------------------- $ ghci -package ghc ___ ___ _ / _ \ /\ /\/ __(_) / /_\// /_/ / / | | GHC Interactive, version 6.6, for Haskell 98. / /_\\/ __ / /___| | http://www.haskell.org/ghc/ \____/\/ /_/\____/|_| Type :? for help. Loading package base ... linking ... done. Loading package template-haskell ... linking ... done. Loading package readline-1.0 ... linking ... done. Loading package unix-1.0 ... linking ... done. Loading package Cabal-1.1.6 ... linking ... done. Loading package regex-base-0.71 ... linking ... done. Loading package regex-posix-0.71 ... linking ... done. Loading package regex-compat-0.71 ... linking ... done. Loading package haskell98 ... linking ... done. ghc-6.6: /usr/lib/ghc-6.6/HSghc.o: unknown symbol `Cabalzm1zi1zi6_DistributionziPackage_a_closure' Loading package ghc-6.6 ... linking ... ghc-6.6: unable to load package `ghc-6.6' --------------------------------------------------------------------- I also get this when compiling for example the following module testGHC.hs: --------------------------------------------------------------------- module Main where import qualified GHC import DynFlags (defaultDynFlags) main = GHC.defaultErrorHandler defaultDynFlags $ putStrLn "Hello World" --------------------------------------------------------------------- --------------------------------------------------------------------- $ ghc -package ghc --make testGHC [1 of 1] Compiling Main ( testGHC.hs, testGHC.o ) Linking testGHC ... /usr/lib/ghc-6.6/libHSghc.a(HeaderInfo.o): In function `r6iZ_info': : undefined reference to `Cabalzm1zi1zi6_LanguageziHaskellziExtension_optional_info' /usr/lib/ghc-6.6/libHSghc.a(HeaderInfo.o): In function `s6r9_info': : undefined reference to `Cabalzm1zi1zi6_LanguageziHaskellziExtension_zdwshowsPrec_info' /usr/lib/ghc-6.6/libHSghc.a(HeaderInfo.o): In function `s6sJ_info': : undefined reference to `Cabalzm1zi1zi6_DistributionziCompiler_lvl31_info' /usr/lib/ghc-6.6/libHSghc.a(HeaderInfo.o): In function `s6sN_info': : undefined reference to `Cabalzm1zi1zi6_DistributionziCompiler_zddEq_closure' /usr/lib/ghc-6.6/libHSghc.a(HeaderInfo.o): In function `s6ID_0_alt': : undefined reference to `Cabalzm1zi1zi6_DistributionziCompiler_polyzugo_info' /usr/lib/ghc-6.6/libHSghc.a(HeaderInfo.o): In function `s6IG_0_alt': : undefined reference to `Cabalzm1zi1zi6_DistributionziCompiler_polyzugo1_info' /usr/lib/ghc-6.6/libHSghc.a(HeaderInfo.o):(.rodata+0x0): undefined reference to `Cabalzm1zi1zi6_LanguageziHaskellziExtension_optional_closure' /usr/lib/ghc-6.6/libHSghc.a(HeaderInfo.o):(.rodata+0x1cc): undefined reference to `Cabalzm1zi1zi6_LanguageziHaskellziExtension_zdwshowsPrec_closure' /usr/lib/ghc-6.6/libHSghc.a(HeaderInfo.o):(.rodata+0x1dc): undefined reference to `Cabalzm1zi1zi6_DistributionziCompiler_lvl31_closure' /usr/lib/ghc-6.6/libHSghc.a(PackageConfig.o): In function `s23t_1_alt': : undefined reference to `Cabalzm1zi1zi6_DistributionziPackage_a_closure' /usr/lib/ghc-6.6/libHSghc.a(Packages.o): In function `s77S_1_alt': : undefined reference to `Cabalzm1zi1zi6_DistributionziPackage_a_closure' /usr/lib/ghc-6.6/libHSghc.a(Packages.o): In function `s79E_1_alt': : undefined reference to `Cabalzm1zi1zi6_DistributionziPackage_a_closure' /usr/lib/ghc-6.6/libHSghc.a(Packages.o): In function `s7i7_1_alt': : undefined reference to `Cabalzm1zi1zi6_DistributionziPackage_a_closure' /usr/lib/ghc-6.6/libHSghc.a(Packages.o): In function `s7vI_1_alt': : undefined reference to `Cabalzm1zi1zi6_DistributionziPackage_a_closure' /usr/lib/ghc-6.6/libHSghc.a(Packages.o): In function `s7yi_info': : undefined reference to `Cabalzm1zi1zi6_DistributionziPackage_zeze_info' /usr/lib/ghc-6.6/libHSghc.a(Packages.o): In function `s7GC_1_alt': : undefined reference to `Cabalzm1zi1zi6_DistributionziPackage_a_closure' /usr/lib/ghc-6.6/libHSghc.a(Linker.o): In function `s8TZ_1_alt': : undefined reference to `Cabalzm1zi1zi6_DistributionziPackage_a_closure' /usr/lib/ghc-6.6/libHSghc.a(Linker.o): In function `s8Vv_1_alt': : undefined reference to `Cabalzm1zi1zi6_DistributionziPackage_a_closure' /usr/lib/ghc-6.6/libHSghc.a(Finder.o): In function `s7l2_1_alt': : undefined reference to `Cabalzm1zi1zi6_DistributionziPackage_a_closure' collect2: ld returned 1 exit status --------------------------------------------------------------------- I would like to know what is causing this and how I can fix it? Also, should I file a bugreport? Greetings, Bas van Dijk

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Compiling GHC disabling the type checker
by Neil Mitchell 16 Oct '06

16 Oct '06

Hi, I would like to write a translator which takes a Haskell-like language to GHC compilable Haskell. This Haskell-like language is not explicitly typed, and cannot have types inferred for it (rank 2 types may exist etc), however it is known that the program will not crash with a type error. All case statements are well typed, i.e. case x of {1 -> ..; True -> ...} will not happen, although types cannot be given to the whole program. How does GHC react to a really large number of unsafeCoerce's? Is this likely to destroy performance? Has anything like this been done before? I know that LML was able to "turn off" the type checker, but I guess GHC doesn't have such an option, because of its typed Core language. Thanks Neil

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6.4.3 and threaded RTS problems
by Simon Marlow 16 Oct '06

16 Oct '06

Hi Folks, Roman Leshchinskiy and I looked into the 6.4.3 crashes on Sparc/Solaris yesterday. I think we may have found the problem, and it seems likely that this is the same problem affecting 6.4.3 on MacOS X. The threaded RTS is assuming in a couple of places that pthread_cond_wait() doesn't spuriously wake up, which is apparently the case on Linux but not true in general. I don't think this bug affects 6.6. I could be wrong, however. Does anyone on MacOS X have a recent testsuite run with the HEAD? I'll try to put together a fix for 6.4.3 when the 6.6 release cycle has died down. Cheers, Simon

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Parallel GC
by Chad Scherrer 16 Oct '06

16 Oct '06

IIRC, there was some work being done this past summer on parallelizing GC for SMP GHC (I think that's my current record for most acronyms in one sentence). GHC 6.6 is reported as having single-threaded GC, and I'm wondering if an unforeseen technical problem might have come up with parallelization, or whether something is still in the works. Excitedly awaiting GHC's SMP GC, Chad Scherrer "Time flies like an arrow; fruit flies like a banana" -- Groucho Marx

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load stdm problem
by TOPE KAREM 16 Oct '06

16 Oct '06

Hi, After downloading Haskell 98 (current version), I tried to load stdm by typing *:load stdm *I kept gettin <command line> could not find module 'stdm' I added path under system variables under environment variables like this: control panel/system/Aadvanced/(under system variable)Environment variables/path *c:ghc/stdm.hs* After which I tried to load stdm as before but there is no changes. Could you please help. Thanks Tope, South Africa

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Bad control characters in GHCi 6.6 (Mac OS X PPC)
by Björn Buckwalter 16 Oct '06

16 Oct '06

Dear all, I downloaded the GHC 6.6 tarballs, built and installed them on my mac (Tiger, PPC) using the documented procedure: ./configure make make install The build and install was fairly smooth. However, ghci will not recognize "control characters", e.g. delete/backspace, arrow keys, ctrl-a, ctrl-d et c. It seems to recognize ctrl-c for cancelling a line but will print the ^C first. A typical session may look like: ___ ___ _ / _ \ /\ /\/ __(_) / /_\// /_/ / / | | GHC Interactive, version 6.6, for Haskell 98. / /_\\/ __ / /___| | http://www.haskell.org/ghc/ \____/\/ /_/\____/|_| Type :? for help. Loading package base ... linking ... done. Prelude> 1 + 2 3 Prelude> Arrow keys ^[[D^[[A^[[B^[[C <interactive>:1:11: lexical error at character '\ESC' Prelude> Delete ^? <interactive>:1:7: lexical error at character '\DEL' Prelude> Control C ^CPrelude> Ok, command was terminated but no newline... now backa^?space ^?^?^? <interactive>:1:2: parse error on input `,' Prelude> ^D <interactive>:1:0: lexical error at character '\EOT' Prelude> :q Leaving GHCi. My previous installation of GHC (6.4.2 from darwinports) didn't have these problems. I realize that this may be due to my lack of unix skills rather than pertinent to GHC. Any help would be appreciated. Thanks, Bjorn Buckwalter

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