[Haskell-beginners] -with-rtsopts ignored at compile time

[Kees Bleijenberg]

I understand the problem.  I’ve set the GHCRTS environment variable and when I run the program I get : <unknown>: Most RTS options are disabled. Link with –rtsopts to enable them.  

Then I added rtsopts to the command line: ghc -shared -rtsopts -O2 -o  TBGlas.dll TBGlasDll.hs

and I get the same errormessage again: Most RTS options are……   What is the problem?

 

I’am using GHC version 7.4.2 in Windows.

 

Greetings,

Kees

 

 

Van: Beginners [mailto:beginners-bounces at haskell.org] Namens Brandon Allbery
Verzonden: maandag 21 oktober 2013 14:53
Aan: The Haskell-Beginners Mailing List - Discussion of primarily beginner-level topics related to Haskell
Onderwerp: Re: [Haskell-beginners] -with-rtsopts ignored at compile time

 

On Mon, Oct 21, 2013 at 8:01 AM, Kees Bleijenberg <k.bleijenberg at lijbrandt.nl> wrote:

When I run my program, I get a stack overflow message (current stacksize is 8388608 bytes) and the advice to use +RTS –Ksize  -RTS

The Haskell code creates a Windows dll, so no command line. That’s why I want to change the stack size at compile time.

 

I think the default RTS options are only settable in a compile that produces an executable; otherwise there would have to be a chunk of code that retrieved all the rtsopts from every Haskell-compiled DLL and somehow reconciled any conflicts between them. Also note that if the main program is in C, you don't get -with-rtsopts processing at all; see http://www.haskell.org/ghc/docs/latest/html/users_guide/ffi-ghc.html#using-own-main for how you set RTS options in this case. (See at "To use +RTS flags with hs_init()".)

 

In this particular case you may be better off just using the %GHCRTS% environment variable.

 

-- 

brandon s allbery kf8nh                               sine nomine associates

allbery.b at gmail.com                                  ballbery at sinenomine.net

unix, openafs, kerberos, infrastructure, xmonad        http://sinenomine.net

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