I've put a compiled version of ghc6.2.2 for Linux machines still using glibc2.2
on
http://www.informatik.uni-bremen.de/~ger/ghc
In fact it should work on glibc2.3 as well, thanks to a minor hack from
Christian Maeder.
Documentation is not complete, but does at least include HTML.
I am responsible for a large project containing 577 Haskell library
modules, with almost 120 KLOC. These modules are divided into packages.
They can be compiled either
(1) the old way, using ghc -M to generate dependency files, and then
using make to call GHC once for each file.
(2) the new way,
I have implemented code to do this which I think is better than
John Meacham's, because it (a) handles all UTF8 sequences
(up to 6 bytes); (b) checks for errors as UTF8 decoders are
supposed to do; (c) lets you determine if there is an error
without having to seq the entire list. Here is a link:
Volker Stolz wrote (snipped):
The functions are C89, so they should be present *somewhere* in libc
anywhere.
Yes, you're right. Normally isspace and friends are used as macros,
but ANSI C requires them to be also available as functions so they
must be exported that way.
Therefore if you don't
Christian Maeder wrote:
What is ctype.h good for?
A good question. Its only use seems to be in
ghc/rts/RtsFlags.c where it is used for functions
like isdigit and isspace for decoding the RTS flags.
Maybe it should be retired altogether.
I'm rather puzzled how this works if ctype.h isn't
there at
I think there should be a GHC option --print-sharedir
(or you could call it --print-datadir), corresponding
to ghc --print-libdir. Thus on our system
ghc --print-libdir
prints out
/home/linux-bkb/ghc/ghc-6.2.1/lib/ghc-6.2.1
and I would like
ghc --print-sharedir
to print out
Sigbjorn Finne wrote:
Not sure what 2) refers to, but 1) and 3) is already in 6.2.x;
no need to use the heavier-weight -threaded stuff to enable
it.
What I mean is a Windows version of Simon M's:
http://www.haskell.org//pipermail/libraries/attachments/20040317/609414e2/Process-0001.obj
or
Is there any chance that GHC 6.04, or any GHC version in the next few
months, will support the following on Windows:
1) use of native threads so that the world won't be stopped every time
you wait for a character;
2) the new system-independent runProcess interface;
3) Network.Socket. (Maybe it
I have implemented UTF8-encode/decode. Unlike the code someone has already
posted it handles all UTF8 sequences, including those longer than 3 bytes.
It also catches all illegal UTF8 sequences (such as characters encoded
with a longer sequence than necessary). Here is the code.
David Brown wrote (snipped):
What license is your code covered under? As it stands now, it is an
informative example, but cannot be used by anybody.
As author, I am quite happy for it to be used and modified by other people
for non-commercial purposes. As far as I know my employers wouldn't
any
Sven Panne wrote:
Huh? I'm not sure what you mean exactly, but with the help of unsafePerformIO
and a pragma for clever compilers you can simulate something like a global
variable in Haskell. Here an excerpt from the GLUT menu handling module:
{-# NOINLINE theMenuTable #-}
theMenuTable ::
I have produced, with Simon M's help, an unofficial binary release of ghc 6.2 on
Solaris. This may be downloaded from
http://www.informatik.uni-bremen.de/~ger/ghc/
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Simon Marlow wrote:
This has to be one of the most irritating ways a program can
fall over.
Can't the Haskell RTS try just a /little/ harder to help the poor
programmer? For example by saying what sort of exception it is, and
(if it's a dynamic exception) what type it has?
An unknown
This has to be one of the most irritating ways a program can fall over.
Can't the Haskell RTS try just a /little/ harder to help the poor
programmer? For example by saying what sort of exception it is, and
(if it's a dynamic exception) what type it has?
For the development snapshot 6.3.20031201, System.Posix.forkProcess
has the type IO () - IO System.Posix.Types.ProcessID. In 6.0.1
it has type IO () - IO (Maybe System.Posix.Types.ProcessID). Is
this change intentional, and if so how are you supposed to test
after the fork if this is the parent
[EMAIL PROTECTED] wrote (snipped):
I don't have such duplicate definitions in my files ... producing a
package with ghc-pkg -a works OK for me with Wolfgang Thaller's GHC
6.0.1 build. Is that how you're doing it, or are you trying to produce
the GHCi object file manually?
I was producing it
Section 4.10.3 of the GHC manual tells me to use
ld -r --whole-archive
to convert a .a file into a .o file suitable for GHCi. However
these options only work for GNU ld, which doesn't seem to be
available on MacOS (uname -srv gives me
Darwin 6.8 Darwin Kernel Version 6.8: Wed Sep 10 15:20:55
Template Haskell is frightfully good and we want to get rid of cpp and
use it instead, but there's one tiny problem, namely that for cpp it
is possible to define variables on the command line (-DSIMON=MARLOW and so
on) while with Template Haskell it doesn't seem to be. Could there be
some kind of
Yes I know this is really Apple's fault, but according to
http://developer.apple.com/documentation/ReleaseNotes/DeveloperTools/GCC3.html
The GCC 3.3 preprocessor inserts a new pragma, #pragma GCC set_debug_pwd, as part
of the new Distributed Builds feature. (See below.) This may surprise
Binaries for HTk (a Haskell graphics package that uses HTk) for ghc6.01
on Linux, Solaris, Windows and FreeBSD are now available from the HTk page:
http://www.informatik.uni-bremen.de/htk/
Many thanks to Guy Coleman for the FreeBSD package.
___
Many thanks for Data.HashTable, which I am about to use. Unfortunately
I seem to need an unseemly hack because the key I want, namely ThreadId's,
don't have a hash function defined, and defining one requires me to muck
around with GHC internal functions. Could some more hash functions be
I have created binary bundles for HTk, our Haskell interface to Tcl/Tk,
for ghc5.04.3 on Linux/x86 and Windows, and put them on the download page:
http://www.informatik.uni-bremen.de/htk/download/INSTALL.BINARY.html
I will add FreeBSD and Solaris bundles when I can get hold of ghc5.04.3
on
character down each pipe; unfortunately this doesn't seem
to help.
Any other suggestions?
By the way this is all GHC5.04.1, which seems to be the last FreeBSD version available,
at least with pkg_add.
Thanks.
George Russell
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Volker Stolz wrote: In local.glasgow-haskell-users, you wrote:
I'm trying to get HTk to work on FreeBSD (actually FreeBSD running inside a VMware
virtual machine, but I don't think that should make any difference). How HTk works
is it creates a couple of pipes
(readIn,writeIn) -
Alex wrote
[snip]
Using ghc-5.04.2 under cygwin, and cygwin (v. 1.3.10-1), I'm having some
horrible problems with inconistent treatment of filenames, especially
when using (gnu, cygwin) make. In a nutshell, make seems to be passing
paths such as /usr/local/hmake (etc) to ghc, which is, as I
I've compiled HTk for ghc-5.04.2 on Solaris, Linux and Windows, and put binary bundles
at
http://www.informatik.uni-bremen.de/htk/
So you can write portable graphical user interfaces using the latest release of your
favorite Haskell compiler.
Sorry it's a bit late; it's not that it's
This isn't a bug, just a suggestion. It's not even a very important
suggestion, but one that might be worth implementing if it's easy and you can
find the the time. Or perhaps I am just doing things the wrong way?
The point is that I sometimes have something like the following situation
class
Simon Peyton-Jones wrote:
[snip]
One other idea though. Suppose you say
class ComplicatedClass x where
_simpleTitleFn :: x - String
muchMoreComplicatedTitleFn :: extra arguments - x - IO ...
In general GHC doesn't report warning unused for variables whose name
begin
I am using .hi-boot files quite a lot at the moment. I'm very grateful for the recent
change to a more Haskelly syntax, but I have a couple of suggestions for the GHC team
to implement in their no doubt ample free time. 8-)
(1) Importing a module {-# SOURCE #-} into itself currently produces a
of MVars as
required.
Good luck,
George Russell
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Would it be possible to bring the DeepSeq library into the libraries
distributed with GHC? (I think Dean Herington is responsible for it.)
Of course it's easy enough to drop it into one's own program (I am just
about to do this) but
(1) It is fairly common to want to force deeper evaluation.
Simon Marlow wrote:
[snip]
Can't you just fix your build so that the situation doesn't occur?
[snip]
Grumble. Yes, I suppose so.
I hate being an implementor instead of a bug-reporter.
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Simon Marlow quoted Max Kirillov
[snip]
Building htk, I've got an error:
=20
TestGetPut.hs:6:
Module `GetPut' is located in package `Main'
but its interface file claims it is part of package
`uni-events-test'
=20
It happened (as far as I got) when ghc saw in current path
Ah, I've figured it out. The new .hi-boot file format is actually Haskell!! Well
almost.
You have to fully qualify type names (you can't use Int, you must use GHC.Base.Int)
and the input isn't run through -cpp.
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Can you stop ghc-pkg complaining when it can't find the library for a package,
and insert the package into its configuration file? Some of my scripts rely
on being able to build the package.conf file ahead of time.
What with this, and because ghc-pkg doesn't seem able to cope with private
Formerly .hi and .hi-boot files had the same format; however ghc5.03 has a binary
format for
.hi files and a textual one for .hi-boot files. This is a nuisance for me, because I
have an
ingenious scheme by which .hi-boot files are themselves from Haskell files by ghc,
which thinks
it is
Simon Peyton Jones wrote:
I am therefore deeply reluctant to provide both GHC-for-mingw32
and GHC-for-cygwin. One build on Win32 is enough! We ended
up with a mingw32 basis because it meant we could make GHC=20
completely self-contained -- no dependence on cygwin1.dll etc.
This was
Writing .hi-boot files is a pain, and the works (allegedly) containing a compiler
which
does mutually recursive modules properly seem permanently gummed up. Therefore may I
suggest
a new .hs-boot suffix which compiles Haskell to produce just a .hi-boot file? I
already have
two .hs-boot
It would occasionally be nice to have a function
cast :: (Typeable a,Typeable b) = a - Maybe b
which returns Just a if a and b have the same type, and Nothing otherwise.
This may seem rather a curious need, but it arises with existential
types; if you have
data A = forall a . (context) = A
Simon Marlow wrote:
What's wrong with just saying -Idir whenever you say -idir?
This seems to work but for more complicated combinations the two options have slightly
different formats. For example, if I have several directories separated by colons, and
end the list with a superfluous colon
Once again I find myself wanting something like the following function with
finite maps:
fmToListByRange :: Ord key = FiniteMap key elt - (key,key) - [(key,elt)]
fmToListByRange map (k1,k2)
is supposed to return all elements in the map with keys from k1 to k2 (inclusive).
Although this
Leon Smith wrote:
[snip]
If GHC had true existential typing, as opposed to just existential datatypes,
you could reasonably code what I think you want like this:
class A a where
basicA :: Bool
nextA :: a - (EX a'. A a' = a')
basicA = True
nextA = id
data WrappedA =
Recently I've been experimenting with a sort of OOP with GHC, using existential types
and
(overlapping, undecidable) multi-parameter type classes, but it doesn't seem to work
as you
might expect because of the way GHC resolves overloaded functions at compile-time.
For example,
given class A
There are various reasons why one might have a Haskell file which doesn't have the
expected Module.hs filename, in particular when putting ghc into some larger
system which does its own thing with files. I may well want this as part of UniForM
in the next few months. However ghc doesn't provide
This looks like a bug, but please don't change it!
If you have a file A.blah.hs containing a module A, ghc5.02 compiles it, producing
A.hi and A.blah.o.
I have an application for this, since I have just, for the first time, been
reluctantly
compelled to introduce recursive modules. Rather
Seems to me it would make more sense for the message
.hs:214: unterminated `{-'
message to tell me where the {- is, rather than where the EOF is.
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Is there a way in Glasgow Haskell to get a thread to wait on a child process
in the same way as the Posix function wait(), and get the termination status
of the child? If so, how?
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If you have a type error message at the very start of a do statement, the result
can be rather confusing, because the typechecker doesn't know that do's are
almost always have type (IO (something)) and so tries to shoehorn the monad
to fit the type. This has actually happened to me several
GHCi allows us to mix fixed compiled and dynamic interpreted code to
be run from what I presume is dynamic interpreted code - the command
prompt. Would it be possible to run dynamic interpreted code from
a compiled program? I'm hoping the answer is Yes, because this is what
GHCi does, the only
ghc --make would be wonderful for UniForM, which at the moment consists of
a large selection of libraries, were it not for the restriction that
ghc --make insists on only having one module as an argument. Er why?
At this rate I shall be driven to writing an otherwise useless module
which imports
GHC 5.00 looks wonderful. Would it be possible to make a binary
distribution available for Sparc? As you may remember, I've had
difficulty compiling it myself for Sparc, for some reason I don't know,
and even if I find a way of hacking things to compile it, I'd rather
users (= students) didn't
Marcin 'Qrczak' Kowalczyk wrote:
[snip]
Since the very purpose of killThread is to kill the damn thread,
I find it inconvenient to have to wrap any thread which is supposed
to be killable with Exception.catch to avoid the message. Worse:
it should use block and unblock, otherwise there is a
If Posix.runProcess really is supposed "our candidate for the high-level OS-independent
primitive" (see documentation), it would help if there was a documented way of using it
with pipes. The problem is that runProcess takes handles as arguments, while the
obvious
function, createPipe, returns
I apologise if this has been raised before, but the code I am
writing now would look rather nicer if "partially applied
type constructors" were permitted in instances. For example:
class Event e where
sync :: e a - IO a
data Event extraData a = blah blah . . .
instance (context on
Sven Panne wrote:
[snip]
The current branch-o-mania is a little confusing, but the CVS branch
called "ghc-4-07-branch" (yes, "7", not "8") should contain what you
are looking for. At least I think so... :-} Any bootstrapping problems?
Yes, I get a segmentation fault when the compilation
Why isn't Int an instance of Bits?
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"Steinitz, Dominic J" wrote:
I was experimenting with using FiniteMap. The program compiled ok but the linker
gave me the following error. What do I need to include on the command line or have I
not installed ghc correctly?
[dom@lhrtba8fd85 FiniteMap]$ /usr/bin/ghc -o main test.o
A minor quibble I know, but every time I use sets I want to add/subtract single
elements
to/from them. There is no function provided for doing this, so instead you have to do
union/delete with a singleton set constructed from the element. I appreciate the zeal
of the designer of this module to
Why not steal a good idea from Standard ML/New Jersey now and again? This has
"Or-patterns" which allow you to match against a disjunction of patterns,
EG
fun sleepIn (Date.Sat | Date.Sun) = true
| sleepIn _ = false
Where you have variables in the patterns, you bind only the variables which
The
readFile :: FilePath - IO String
action returns the contents of the associated file. This is almost what
I want, but not quite, because readFile is lazy. Hence if the string is
only partly read, the file is still open. What I want instead is a function
which
(a) opens the file;
I don't really understand getContents. (Does anyone?) I have some code here
(far too large to submit). If I do (on Linux, ghc4.08.1, both with and without
optimisation)
--
contents - hGetContents handle
seq (last contents) (hClose handle)
--
Simon Marlow wrote:
[snip]
"Once a semi-closed handle becomes closed, the contents of
the associated stream becomes fixed, and is the list of those
items which were succesfully read from that handle".
[snip]
Ah, now I see. I had assumed that hClose'ing a semi-closed
On this subject, where am I to get the libgmp2.a required by 4.08.1
(on Linux anyway). I tried compiling the very latest version of GMP
but it only produced a libgmp.a file. Is that the same?
NB that RPMs aren't a lot of good to me unless they come with a hefty
bribe for the hard-nosed system
Keith Wansbrough wrote:
On this subject, where am I to get the libgmp2.a required by 4.08.1
(on Linux anyway). I tried compiling the very latest version of GMP
but it only produced a libgmp.a file. Is that the same?
Same happened to me. ln -s libgmp.a libgmp2.a worked for me. I
"Manuel M. T. Chakravarty" wrote:
Is it possible that you are using a Linux box on which the
gmp devel libraries are not (properly) installed?
Very likely. Our local sysadmins do not appear to consider
integers a sufficiently common concept in computer science to
justify a MB or so
Lennart Augustsson wrote:
By definition, if you follow the standard you can't be wrong. :)
But the standard can be wrong. Perhaps this is a typo in the report?
I think I looked at this a while back. The standard is kaput. It gets even
worse if you try to make sense of the definitions of succ
It would probably speed up my code somewhat if the GHC libraries provided
more support for PackedStrings. For example, some code I have
reads in stuff from a Posix fd (using Posix.fdRead) and then feeds it
to the GHC regular expression interface (using RegexString.matchRegex).
It is frustrating
Marcin 'Qrczak' Kowalczyk wrote:
As for the language standard: I hope that Char will be allowed or
required to have =30 bits instead of current 16; but never more than
Int, to be able to use ord and chr safely.
Er does it have to? The Java Virtual Machine implements Unicode with
16 bits.
Socket.accept function returns a PortNumber as its third argument. (This
is not what the interface comment says, but the comment is wrong.) However
I can't find any way of extracting the contents of the PortNumber to an
integer.
Simon Peyton-Jones wrote:
Fair enough. But would you like to suggest an algorithm GHC could use
to decide what to put in the .hi file?
Well that's a big question. As I understand it, the errant value,
lvl20, is a string representing an error message (which I suppose is to
be thrown in the
Simon Marlow wrote:
Let me see if I've got the semantics right: takeMVarMulti makes a
non-deterministic choice between the full MVars to return the value, and if
there are no full MVars it waits for the first one to become full?
Yes that's precisely right. putMVarMulti is the converse. (So
Claus Reinke wrote:
Right. I am relieved to read that your application source is not
full of calls to putMVar, but rather uses safe abstractions built
on top of MVars (it might be interesting to isolate them out of
your current application and migrate them to a CH library?).
Not a bad idea.
Simon Marlow wrote:
The only way I can see to do this is to add a lock field to the MVar. And
since this lock would look very much like another MVar, you may as well just
use another MVar to lock it (after all, that adds exactly zero extra
complication to the system :-).
Absolutely.
There's
Would it be possible to implement an operation to lock an MVar without
any extra expense? So that the thread owning the MVar can do things to
it, but no other thread can. If it is possible, I suggest that it be
added and it would solve Marcin's problem (isEmptyMVar would then suffice).
Simon Peyton-Jones wrote:
Try it now with -fddump-minimal-imports
I don't promise it'll work, but it does in simple cases.
It produces a file M.imports
Brilliant, thanks. I'll try it out (indeed probably use it) when I next manage
to compile GHC from CVS.
(Sent to glasgow-haskell-users rather than haskell, as it is GHC-specific.)
If we were writing a C library rather than a Haskell library, we could make
"head" a macro which included an appropriate message referring to __FILE__
and __LINE__. The equivalent in Glasgow Haskell would be to make
When I asked on the mailing list about this a year ago, I think I was told
that it wasn't exactly supported any longer. So rather than trying to get
GHC to compile ReadLine in, I used green-card instead. The attached file gives
you the very simplest readline function.
If you want to try to get
Simon Peyton-Jones wrote:
| At the time of writing, I am waiting for yet another long
| Haskell re-make of
| lots of modules to complete. The frustrating thing is, that
| at least 90% of these
| remakes are actually completely unnecessary.
OK, I have heard your cries, and have fixed
Two further comments on RegexString:
(1) I actually have to use Ian Jackson's excellent
matchRegexAll
function to do what I want. If this were documented and supported
I would appreciate it.
(2) While I can live without the facility (I think) it would nevertheless
be nice to
Simon Marlow wrote:
Sparc users in particular: I've identified some recent breakage in the
Sparc port of GHC. If you've been experiencing crashes in binaries
generated by a compiler built from recent (at least February) sources, then
I've checked in a fix which might help.
George,
Simon Marlow wrote:
Sparc users in particular: I've identified some recent breakage in the
Sparc port of GHC. If you've been experiencing crashes in binaries
generated by a compiler built from recent (at least February) sources, then
I've checked in a fix which might help.
George,
"Manuel M. T. Chakravarty" wrote:
This is exactly what the `...-config' script that I was
talking about is supposed to do. Now we can argue whether
that should be part of `ghc' proper or an extra script. An
extra script at least has the advantage that it is easier to
maintain manual in
Marc van Dongen wrote:
Hello there,
When doing cvs updates I get a lot of errors of the form
patch: Invalid options.
patch: Usage: patch [-blNR] [-c|-e|-n] [-d dir] [-D define] [-i patchfile]\
[-o outfile] [-p num] [-r rejectfile] [file]
cvs update: could not
"Manuel M. T. Chakravarty" wrote:
Malcolm Wallace [EMAIL PROTECTED] wrote,
Can I propose a change to the -i / -I flags? Currently, the -idir (or
-Idir) options add a directory to the search path for imports. This
directory is either relative to the current dir, or absolute. My
I must admit I'm surprised by the reaction to my suggestion. Here /usr is shared
between lots of machines and there is no question of my installing GHC in /usr/bin
or anything like it. (The few system adminstrators here are all honest, overworked,
and sadly incorruptible.) My original problem
The latest binary distribution puts the GHC include files in
"lib/ghc-4.06/includes", not "lib/includes" as older versions used to.
This is a nuisance, because it means that there isn't any way a
Makefile can refer to the includes without coding in the GHC version.
Or is there? One needs access
Part of the problem right now seems to be that GHC is wrongly rewriting (or
perhaps touching) the .hi file even though nothing in it is altered.
(This is clear because -hi-diffs is also on and not reporting anything).
Thus even though I'm using -Onot -recomp it's still recompiling everything.
floor(Inf) and floor(NaN) do not appear to be defined in Standard Haskell.
(They both come down to "properFraction" which is only defined for Ratio.)
This differs from (for example) the Standard ML Basis Library, where it
is specified that floor(Int) should raise Overflow and floor(NaN) should
George Russell wrote:
This scheme is not the cleverest that could be devised. For example it is
still necessary to recompile whole chains of modules if you add an import
declaration. (Not to a system library, imports from those are counted as
"stable" in GHCs and my system
Malcolm Wallace wrote:
Wrong. If B imports C and has no export list, nothing from C is
re-exported, only definitions from B itself, with the single exception
of C's instance decls.
OK, but this has no influence at all on my suggestions except to make
them work slightly better.
Jon Fairbairn wrote:
I'm afraid I've not gone through your detailed suggestions, but in the
short term, would a crude hack that I used to use with Algol68C help?
No, fraid not. GHC already does this hack anyway. Algol68C didn't have
interface declarations. Still, nice to find someone else
Sigbjorn Finne wrote:
Seems like you're not using -recomp.
No I'm not. What about documenting it somewhere?
George Russell wrote:
Sigbjorn Finne wrote:
Seems like you're not using -recomp.
No I'm not. What about documenting it somewhere?
I take that back. I AM using it in the big program I mentioned, but I still
get huge swathes of unnecessary compilations. Maybe it needs to be still
George Russell wrote:
George Russell wrote:
Exactly the same happens at the same time to Processor 2.
Now somehow you have to distinguish between Processor 1 and Processor 2,
because only one is going to get to lower the flags. But I don't think
with the existing Concurrency
Tom Pledger wrote:
For two threads to have access to the same MVar, they must have a
common ancestor, right? Could a common ancestor spawn a transaction
broker thread? That would be similar to what database management
systems do. It'd still be centralised, but wouldn't need to do unsafe
Marcin 'Qrczak' Kowalczyk wrote:
...relative time of IO events that occured in a single thread.
(=) imposes the sequencing.
Yes OK. I see no problem with required elements of the Unique type to
increase in a single thread. But I suspect anything stronger than this
could slow things down
Marcin 'Qrczak' Kowalczyk wrote:
If the IO monad can maintain a random number generator, it can as
well mainain unique Integer supply. The interface is clean.
It can, but according to the current specification, it doesn't. Maybe
it should. I think Integer is a little too specific - how about
Sorry if you don't want to be bothered with my problems, but I think this
problem which I've just encountered is rather amusing. Is there a neat solution?
I confess to finding concurrency problems difficult so there might be.
I want to implement a type Flag. Each flag is either Up or Down.
Simon Marlow wrote:
The binary dists all have pre-formatted HTML and PS docs, so you could just
download one of those (except it seems the link to the Linux binary dist is
currently broken; I'll fix that shortly, in the meantime there's the solaris
binary dist).
I think perhaps you are
Why doesn't the configure script have a
--with-happy
option? There are --with-gcc and --with-hc to tell configure where to find
gcc and GHC.
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