Re: Avoiding BlockedIndefinitelyOnSTM exceptions

Gabriel Is the underlying issue one of “scope” - STM variables have global scope, would a batter approach to be to create scope of such things and then some overall recovery mechanism could handle such an exception within that scope? Neil On 14 Jul 2014, at 03:30, Gabriel Gonzalez wrote: > I

Re: Cross compiling for Cortex A9

On 07/12/14 07:27 AM, Michael Jones wrote: Karel, I have failed to figure out how to make this happen: ("target arch", "ArchARM {armISA = ARMv7, armISAExt = [VFPv3,NEON], armABI = HARD}”) This is result of running ./configure on arm/ubuntu12.04 -- so I don't cross-compile, but rather compi

Installing ghc-7.8.3 OS X bindist fails on Xcode 4 CLI-only machine

Hi, I'm having problems installing the OS X bindist of GHC 7.8.3 on my machine. Here are the specs for my machine: Hardware: MacBook Pro, 13-inch, Mid 2009 Operating System: OS X 10.8.5 gcc: i686-apple-darwin11-llvm-gcc-4.2 (GCC) 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2336.11.00) No

Re: Installing ghc-7.8.3 OS X bindist fails on Xcode 4 CLI-only machine

On Mon, Jul 14, 2014 at 4:53 AM, Christiaan Baaij < christiaan.ba...@gmail.com> wrote: > > cc1: error: unrecognized command line option "-Wno-invalid-pp-token" > > cc1: error: unrecognized command line option "-Wno-unicode" > Those are clang options, for what it's worth. It seems to be defaulting

Fwd: Installing ghc-7.8.3 OS X bindist fails on Xcode 4 CLI-only machine

FWIW Mark had this reply but is apparently not subscribed to, or being rejected by, ghc-users and asked me to forward it. -- Forwarded message -- From: Mark Lentczner Date: Mon, Jul 14, 2014 at 7:34 AM Subject: Re: Installing ghc-7.8.3 OS X bindist fails on Xcode 4 CLI-only machin

Re: Avoiding BlockedIndefinitelyOnSTM exceptions

I don't quite understand your question, but I'll try to give a fuller explanation of the problem I was trying to solve to see if it perhaps answers your question. The motivation behind `pipes-concurrency` was to make it easy for readers and writers to coordinate implicitly (using the garbage

Re: Cross compiling for Cortex A9

On 07/14/14 04:58 PM, Michael Jones wrote: Karel, Thanks. This helps. If I understand, you have Linux running on a Panda, and on that Panda system you have gcc, and you compile GHC on the Panda itself, rather than build a cross compiler. I can see the advantage of building this way. Correct!

Re: Installing ghc-7.8.3 OS X bindist fails on Xcode 4 CLI-only machine

Thanks, the work-around did the trick. On 14 July 2014 16:34, Mark Lentczner wrote: > Yes - this is a known problem in GHC (#9257 > ) > The problem is that there is one gcc invocation in the "make install" step > (!) and that the clang/gcc detection

Fwd: how to get ghci to load compiled modules in 7.8?

I sent this to haskell-cafe, but there was no response. On stackoverflow there was no response either. I'm trying one last time, but adding ghc-users (which I should have done at the beginning!). Surely it can't be that no one knows how to load modules in ghci? I know a lot of work was done to e

Re: how to get ghci to load compiled modules in 7.8?

On Mon, Jul 14, 2014 at 1:08 PM, Evan Laforge wrote: > I sent this to haskell-cafe, but there was no response. On > stackoverflow there was no response either. I'm trying one last time, > but adding ghc-users (which I should have done at the beginning!). > Surely it can't be that no one knows h

Re: how to get ghci to load compiled modules in 7.8?

On Mon, Jul 14, 2014 at 10:36 AM, Reid Barton wrote: > See https://ghc.haskell.org/trac/ghc/ticket/8736. The current workaround for > GHC 7.8 is to compile with -dynamic, not -dynamic-too. That was it! Thanks so much. As an aside, I was kind of expecting a faster link time due to -dynamic, but

Re: how to get ghci to load compiled modules in 7.8?

On Mon, Jul 14, 2014 at 11:13 AM, Evan Laforge wrote: > As an aside, I was kind of expecting a faster link time due to > -dynamic, but apparently not. Oh well, I'm happy enough ghci is back. Aha, I needed to pass -dynamic when linking too. Sorry for the noise. __

Re: how to get ghci to load compiled modules in 7.8?

On Mon, Jul 14, 2014 at 11:13 AM, Evan Laforge wrote: > On Mon, Jul 14, 2014 at 10:36 AM, Reid Barton wrote: >> See https://ghc.haskell.org/trac/ghc/ticket/8736. The current workaround for >> GHC 7.8 is to compile with -dynamic, not -dynamic-too. > > That was it! Thanks so much. Actually... not

Re: how to get ghci to load compiled modules in 7.8?

On Mon, Jul 14, 2014 at 12:35 PM, Evan Laforge wrote: > Actually... not quite. -dynamic seems let ghci load, but when I load > with the GHCI API, I get this: > > compile error: : > cannot find normal object file ‘build/debug/obj/Util/Contro.o’ > while linking an interpreted expression Ac

Why no `instance (Monoid a, Applicative f)=> Monoid (f a)` for IO?

It seems to me that this should be true for all `f a` like: instance (Monoid a, Applicative f)=> Monoid (f a) where mappend = liftA2 mappend mempty = pure mempty But I can't seem to find the particular `instance (Monoid a)=> Monoid (IO a)` anywhere. Would that instance be incorrect,

Re: Why no `instance (Monoid a, Applicative f)=> Monoid (f a)` for IO?

There are monads for which you want another Monoid, e.g. Maybe provides a different unit, because it pretends to lift a Semigroup into a Monoid. There are also monoids that take a parameter of kind * that would overlap with this instance. So we can't (and shouldn't) have the global Monoid instanc