Send Beginners mailing list submissions to
beginners@haskell.org
To subscribe or unsubscribe via the World Wide Web, visit
http://www.haskell.org/mailman/listinfo/beginners
or, via email, send a message with subject or body 'help' to
beginners-requ...@haskell.org
You can reach the person managing the list at
beginners-ow...@haskell.org
When replying, please edit your Subject line so it is more specific
than "Re: Contents of Beginners digest..."
Today's Topics:
1. cabal multi-library setup (Cristian Petrescu Prahova)
2. Re: cabal multi-library setup (Magnus Therning)
3. GHC compilation without using module Main (Andrew Pennebaker)
4. Re: GHC compilation without using module Main (Daniel Fischer)
5. Re: GHC compilation without using module Main (Andrew Pennebaker)
6. Re: GHC compilation without using module Main (Andrew Pennebaker)
7. Re: GHC compilation without using module Main (Daniel Fischer)
----------------------------------------------------------------------
Message: 1
Date: Sun, 6 Mar 2011 12:30:45 -0800
From: Cristian Petrescu Prahova <crist...@gmail.com>
Subject: [Haskell-beginners] cabal multi-library setup
To: beginners@haskell.org
Message-ID: <0a503181-4a24-4dce-b848-29d749b28...@gmail.com>
Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes
Hi,
I have a small project consisting of a library and an application. I
cabalized both. However, whenever I tweak the library I cabal install
it, then move to the app directory, then reconfigure, then rebuild.
This is annoying repetitive shell typing. Is there a way to configure
my setup such that cabal build app automatically rebuilds (and
reinstalls?) the library dependency? I'd like something like:
# builds the library and runs the tests
cabal make lib
# builds the app and the library dependency, then runs the app
cabal make app
Thank you,
Cristian
------------------------------
Message: 2
Date: Sun, 6 Mar 2011 20:34:35 +0000
From: Magnus Therning <mag...@therning.org>
Subject: Re: [Haskell-beginners] cabal multi-library setup
To: beginners@haskell.org
Message-ID: <20110306203435.GA7697@ohann>
Content-Type: text/plain; charset="us-ascii"
On Sun, Mar 06, 2011 at 12:30:45PM -0800, Cristian Petrescu Prahova wrote:
> Hi,
>
> I have a small project consisting of a library and an application. I
> cabalized both. However, whenever I tweak the library I cabal
> install it, then move to the app directory, then reconfigure, then
> rebuild. This is annoying repetitive shell typing. Is there a way to
> configure my setup such that cabal build app automatically rebuilds
> (and reinstalls?) the library dependency? I'd like something like:
>
> # builds the library and runs the tests
> cabal make lib
>
> # builds the app and the library dependency, then runs the app
> cabal make app
I suspect you'll have to write a wrapper makefile in order to get
something like that.
/M
--
Magnus Therning OpenPGP: 0xAB4DFBA4
email: mag...@therning.org jabber: mag...@therning.org
twitter: magthe http://therning.org/magnus
Most software today is very much like an Egyptian pyramid with
millions of bricks piled on top of each other, with no structural
integrity, but just done by brute force and thousands of slaves.
-- Alan Kay
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 198 bytes
Desc: not available
URL:
<http://www.haskell.org/pipermail/beginners/attachments/20110306/165e0f05/attachment-0001.pgp>
------------------------------
Message: 3
Date: Sun, 6 Mar 2011 17:32:43 -0500
From: Andrew Pennebaker <andrew.penneba...@gmail.com>
Subject: [Haskell-beginners] GHC compilation without using module Main
To: Haskell Beginners <beginners@haskell.org>
Message-ID:
<AANLkTi=1u94fpw80hcynqnk-mgj7poq8hqu5+oyko...@mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"
Is there a way to compile a Haskell script with a different module name than
Main?
#!/usr/bin/env runhaskell
module ScriptedMain where
meaningOfLife :: Int
meaningOfLife = 42
main :: IO ()
main = putStrLn $ "Main: The meaning of life is " ++ show meaningOfLife
$ ghc -o scriptedmain scriptedmain.hs
Undefined symbols:
"_ZCMain_main_closure", referenced from:
_ZCMain_main_closure$non_lazy_ptr in libHSrtsmain.a(Main.o)
(maybe you meant: _ZCMain_main_closure$non_lazy_ptr)
"___stginit_ZCMain", referenced from:
___stginit_ZCMain$non_lazy_ptr in libHSrtsmain.a(Main.o)
(maybe you meant: ___stginit_ZCMain$non_lazy_ptr)
ld: symbol(s) not found
collect2: ld returned 1 exit status
Cheers,
Andrew Pennebaker
www.yellosoft.us
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://www.haskell.org/pipermail/beginners/attachments/20110306/acdcc37a/attachment-0001.htm>
------------------------------
Message: 4
Date: Sun, 6 Mar 2011 23:54:53 +0100
From: Daniel Fischer <daniel.is.fisc...@googlemail.com>
Subject: Re: [Haskell-beginners] GHC compilation without using module
Main
To: beginners@haskell.org
Cc: Andrew Pennebaker <andrew.penneba...@gmail.com>
Message-ID: <201103062354.53626.daniel.is.fisc...@googlemail.com>
Content-Type: Text/Plain; charset="utf-8"
On Sunday 06 March 2011 23:32:43, Andrew Pennebaker wrote:
> Is there a way to compile a Haskell script with a different module name
> than Main?
>
$ ghc -main-is ScriptedMain --make ScriptedMain
The -main-is flag tells GHC what to regard as Main.main.
Give it a module name (Foo) to say main is Foo.main, a function name (bar)
to tell it main is Main.bar or a quailfied function name (Foo.bar) to tell
it main is function bar in module Foo.
------------------------------
Message: 5
Date: Sun, 6 Mar 2011 18:03:26 -0500
From: Andrew Pennebaker <andrew.penneba...@gmail.com>
Subject: Re: [Haskell-beginners] GHC compilation without using module
Main
To: Daniel Fischer <daniel.is.fisc...@googlemail.com>
Cc: beginners@haskell.org
Message-ID:
<AANLkTini4HPgdTC4m2vmw=_ged1e9_vkycnskd6zr...@mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"
I got -main-is to work with a single Haskell file, but it seems to have
trouble with multiple files.
$ cat scriptedmain.hs
#!/usr/bin/env runhaskell
module ScriptedMain where
meaningOfLife :: Int
meaningOfLife = 42
main :: IO ()
main = putStrLn $ "Main: The meaning of life is " ++ show meaningOfLife
$ cat test.hs
#!/usr/bin/env runhaskell
module Test where
import ScriptedMain hiding (main)
main :: IO ()
main = putStrLn $ "Test: The meaning of life is " ++ show meaningOfLife
$ ghc -o scriptedmain -main-is ScriptedMain scriptedmain.hs
$ ./scriptedmain
Main: The meaning of life is 42
$ ghc -o test -main-is Test.main test.hs scriptedmain.hs
compilation IS NOT required
ld: duplicate symbol _ZCMain_main_info in scriptedmain.o and test.o
collect2: ld returned 1 exit status
Cheers,
Andrew Pennebaker
www.yellosoft.us
On Sun, Mar 6, 2011 at 5:54 PM, Daniel Fischer <
daniel.is.fisc...@googlemail.com> wrote:
> On Sunday 06 March 2011 23:32:43, Andrew Pennebaker wrote:
> > Is there a way to compile a Haskell script with a different module name
> > than Main?
> >
>
> $ ghc -main-is ScriptedMain --make ScriptedMain
>
> The -main-is flag tells GHC what to regard as Main.main.
> Give it a module name (Foo) to say main is Foo.main, a function name (bar)
> to tell it main is Main.bar or a quailfied function name (Foo.bar) to tell
> it main is function bar in module Foo.
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://www.haskell.org/pipermail/beginners/attachments/20110306/504cfced/attachment-0001.htm>
------------------------------
Message: 6
Date: Sun, 6 Mar 2011 18:21:35 -0500
From: Andrew Pennebaker <andrew.penneba...@gmail.com>
Subject: Re: [Haskell-beginners] GHC compilation without using module
Main
To: Daniel Fischer <daniel.is.fisc...@googlemail.com>
Cc: beginners@haskell.org
Message-ID:
<AANLkTi=zu9tmjiohyoazksaxlvx09e0qy4__ftc8p...@mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"
It turns out you need to delete scriptedmain.o in order for test.hs to
compile.
Cheers,
Andrew Pennebaker
www.yellosoft.us
On Sun, Mar 6, 2011 at 5:54 PM, Daniel Fischer <
daniel.is.fisc...@googlemail.com> wrote:
> On Sunday 06 March 2011 23:32:43, Andrew Pennebaker wrote:
> > Is there a way to compile a Haskell script with a different module name
> > than Main?
> >
>
> $ ghc -main-is ScriptedMain --make ScriptedMain
>
> The -main-is flag tells GHC what to regard as Main.main.
> Give it a module name (Foo) to say main is Foo.main, a function name (bar)
> to tell it main is Main.bar or a quailfied function name (Foo.bar) to tell
> it main is function bar in module Foo.
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://www.haskell.org/pipermail/beginners/attachments/20110306/3a8496a4/attachment-0001.htm>
------------------------------
Message: 7
Date: Mon, 7 Mar 2011 00:26:51 +0100
From: Daniel Fischer <daniel.is.fisc...@googlemail.com>
Subject: Re: [Haskell-beginners] GHC compilation without using module
Main
To: Andrew Pennebaker <andrew.penneba...@gmail.com>
Cc: beginners@haskell.org
Message-ID: <201103070026.52091.daniel.is.fisc...@googlemail.com>
Content-Type: Text/Plain; charset="utf-8"
On Monday 07 March 2011 00:03:26, Andrew Pennebaker wrote:
> $ ghc -o scriptedmain -main-is ScriptedMain scriptedmain.hs
> $ ./scriptedmain
> Main: The meaning of life is 42
> $ ghc -o test -main-is Test.main test.hs scriptedmain.hs
> compilation IS NOT required
You have to recompile, I'm afraid. GHC generated the code for
ScriptedMain.main as entry point 'main', then it generated the code for
Test.main as entry point 'main', so there's two symbols for the entry point
'main', I don't think you can hide that from the linker.
$ ghc -fforce-recomp -o test -main-is...
That would of course be inconvenient if there's more than a small module to
recompile, so it's a good idea to separate the 'main's from the code that
really does stuff.
> ld: duplicate symbol _ZCMain_main_info in scriptedmain.o and test.o
> collect2: ld returned 1 exit status
>
> Cheers,
>
> Andrew Pennebaker
------------------------------
_______________________________________________
Beginners mailing list
Beginners@haskell.org
http://www.haskell.org/mailman/listinfo/beginners
End of Beginners Digest, Vol 33, Issue 8
****************************************
