GHC from CVS HEAD does not require that the Main module export main
The Haskell 98 report says A Haskell program is a collection of modules, one of which, by convention, must be called Main and must export the value main. However, the program below builds and executes fine. module Main() -- should be module Main or module Main(main) where main = putStrLn Hello, World $ runghc Main.hs Hello, World ___ Glasgow-haskell-bugs mailing list Glasgow-haskell-bugs@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs
GHC from CVS
Dear all, after the failed attempts to install ghc 5.00 from the packages you provide, I downloaded ghc from the cvs repository. It compiles just fine except that ghci is not built: ghci ghc-5.00: not built for interactive use Do I have to specify this explicitly? Cheers, Ralf ___ Glasgow-haskell-bugs mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs
Re: GHC from CVS
Ralf Hinze wrote: It compiles just fine except that ghci is not built: ghci ghc-5.00: not built for interactive use Do I have to specify this explicitly? Cheers, Ralf Hi ghci is not built unless you are compiling with ghc 4.11 or better. Try rebuilding ghc using the 5.00 version that you have just built. /Marcus I think you will find that ghci is not built ___ Glasgow-haskell-bugs mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs -- Marcus Shawcroft Ericsson Mobile Applications ___ Glasgow-haskell-bugs mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs
RE: GHC from CVS
| after the failed attempts to install ghc 5.00 from | the packages you provide, I downloaded ghc from the | cvs repository. It compiles just fine except that ghci | is not built: | | ghci | ghc-5.00: not built for interactive use | | Do I have to specify this explicitly? No. Interactive use is only available when HEAD compiles HEAD. I tested the installation on a Suse 7.1 box here last night. Yes, there are problems, which we hope to fix. In the meantime it is easy to get an install working -- the only issue is the readline.so problem. We fixed this by making libreadline.so.3 be a symlink to libreadline.so.4, and then GHCi started up fine. So I suggest you do that too. I'll look into the make install-docs problem today. J ___ Glasgow-haskell-bugs mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs
Re: GHC from CVS
Marcus Shawcroft wrote: Ralf Hinze wrote: It compiles just fine except that ghci is not built: ghci ghc-5.00: not built for interactive use Do I have to specify this explicitly? Cheers, Ralf Hi ghci is not built unless you are compiling with ghc 4.11 or better. Try rebuilding ghc using the 5.00 version that you have just built. And to get a usable system, I've found that you have to compile it with itself again - i.e. compile it three times. Unless I bootstrap to stage 3, recompilation is hopelessly confused: compile a program from scratch - no problem, but make a simple modification, then recompile, and you're likely to get all kinds of strange linker errors. --Jeff ___ Glasgow-haskell-bugs mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs
RE: GHC from CVS
| And to get a usable system, I've found that you have to | compile it with | itself again - i.e. compile it three times. Unless I | bootstrap to stage | 3, recompilation is hopelessly confused: compile a program | from scratch - | no problem, but make a simple modification, then recompile, and you're | likely to get all kinds of strange linker errors. Wa?! We've worked correctly for months with using stage2 bootstraps. If stage2 /= stage3, something is seriously wrong. Can you send some details of the kinds of problems you get? J ___ Glasgow-haskell-bugs mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs
works (was: Re: ghc from CVS (1999/07/31) throws core...)
On Tue, Aug 03, 1999 at 01:49:36 -0700, Simon Marlow wrote: Yesterday's sources were fully broken due to a bogus commit made by me. Things should be ok now. Bad luck to me :-( However, I just wanted to give some feedback that now it's working again (1999/08/03) on Linux (packages downloadable this afternoon). Cheers, Michael -- W*ndoze NT is faster... CRASHING!
Re: ghc from CVS (1999/07/31) throws core...
Hmmm, just a me-too :-( it dies very quickly, just after a couple of calls to times according to strace and possibly in a function called Main_main_info() according to gdb. k Michael Weber writes: But my core dumps, don't give any "blahblah exception (core dumped)" messages. The programs just die (at a very early stage). I still think, it's something with glibc stuff... Cheers, Michael -- XXXVI: The thickness of the proposal required to win a multimillion dollar contract is about one millimeter per million dollars. If all the proposals conforming to this standard were piled on top of each other at the bottom of the Grand Canyon it would probably be a good idea.
RE: ghc from CVS (1999/07/31) throws core...
I wish, I could have provided more debugging info, but strace's and gdb's output isn't very helpful at all. How do I enable those IF_DEBUG(...) macros (or something that helps tracking down the problem)? I tried, but it seems I overlooked something... I add the following lines to my build.mk to build a debugging RTS: GhcRtsHcOpts = -optc-DDEBUG GhcRtsCcOpts = -optc-g SRC_HC_OPTS += -lbfd -liberty STRIP=echo Cheers, Simon
RE: ghc from CVS (1999/07/31) throws core...
$ cat tmp.lhs
module Main( main ) where
main = putStr $ show q
where q = quot 1 0
$ ghc-4.02 tmp.lhs
ghc-4.02: module version changed to 176; reason: usages changed
1006 swift ~/ghc/constraints/mixed
$ a.out
Fail: Prelude.Integral.quot{Integer}: divide by 0
1007 swift ~/ghc/constraints/mixed
$ ghc-4.04 tmp.lhs
ghc-4.04: module version changed to 177; reason: usages changed
1008 swift ~/ghc/constraints/mixed
$ a.out
Arithmetic Exception (core dumped)
I'm afriad that one's my fault; the definition of quot for Integers changed
in 4.04. Anyway, testing for divide by zero isn't required by the Haskell
report.
Cheers,
Simon
Re: ghc from CVS (1999/07/31) throws core...
: Hi!
:
: I tried to recompile the latest ghc (1999/07/31) on a Linux/glibc2.1.1
: system (egcs 2.91.66), but there seems to be a problem: the build works, but
: the resulting compiler produces executables, that throw core, even with
: "main = return ()".
I've noticed that as well. Code like
does not produce proper error messages anymore which it did with
ghc-4.02. One wonders where the performance boost came from:-)
$ cat tmp.lhs
module Main( main ) where
main = putStr $ show q
where q = quot 1 0
$ ghc-4.02 tmp.lhs
ghc-4.02: module version changed to 176; reason: usages changed
1006 swift ~/ghc/constraints/mixed
$ a.out
Fail: Prelude.Integral.quot{Integer}: divide by 0
1007 swift ~/ghc/constraints/mixed
$ ghc-4.04 tmp.lhs
ghc-4.04: module version changed to 177; reason: usages changed
1008 swift ~/ghc/constraints/mixed
$ a.out
Arithmetic Exception (core dumped)
Regards,
Marc van Dongen
ghc from CVS (1999/07/31) throws core...
Hi! I tried to recompile the latest ghc (1999/07/31) on a Linux/glibc2.1.1 system (egcs 2.91.66), but there seems to be a problem: the build works, but the resulting compiler produces executables, that throw core, even with "main = return ()". I have a CVS version from 1999/07/10, and this one works. I subsequently recompiled this version with itself several times, no problem. Since the old version still compiles (I tried this night), and also Manuel produced a glibc2.1 version of ghc: did anyone change some parts of the rts or compiler, that could be touchy to specific glibc versions? Or is the problem related elsewhere? I wish, I could have provided more debugging info, but strace's and gdb's output isn't very helpful at all. How do I enable those IF_DEBUG(...) macros (or something that helps tracking down the problem)? I tried, but it seems I overlooked something... However, I "hello-debugged" the problematic version and traced it to ghc/rts/Schedule.c: case ThreadEnterGHC: ret = StgRun((StgFunPtr) stg_enterStackTop); The case statement is reached, but then the segmentation fault happens somewhere in StgRun() or something it calls (*hmm* I don't regard this info as very helpful at all, since this is pretty early in the startup process...) Cheers, Michael -- * Software Engineering is like looking for a black cat in a dark room in which there is no cat. * Systems Engineering is like looking for a black cat in a dark room in which there is no cat and someone yells "I got it!"
Re: ghc from CVS (1999/07/31) throws core...
On Mon, Aug 02, 1999 at 12:54:23 +0100, Marc van Dongen wrote:
[...]
I've noticed that as well. Code like
does not produce proper error messages anymore which it did with
ghc-4.02. One wonders where the performance boost came from:-)
$ cat tmp.lhs
module Main( main ) where
main = putStr $ show q
where q = quot 1 0
[...]
$ a.out
Arithmetic Exception (core dumped)
Yes, but:
\begin{code}
module Main( main ) where
main = putStr $ show q
where q = quot 1 (0::Int)
\end{code}
gives: Fail: Prelude.Integral.quot{Int}: divide by 0
IIRC, Integer isn't Div-By-Zero-checked (for performance reasons).
But my core dumps, don't give any "blahblah exception (core dumped)"
messages. The programs just die (at a very early stage). I still think, it's
something with glibc stuff...
Cheers,
Michael
--
XXXVI: The thickness of the proposal required to win a multimillion dollar
contract is about one millimeter per million dollars. If all the
proposals conforming to this standard were piled on top of each other
at the bottom of the Grand Canyon it would probably be a good idea.
