[Haskell-cafe] GHC 7.0.1 developer challenges

Simon Marlow marlowsd at gmail.com
Thu Dec 9 13:48:30 CET 2010

On 08/12/2010 16:34, Andrew Coppin wrote:
> On 08/12/2010 03:29 PM, Brandon S Allbery KF8NH wrote:
>> Then build your CGIs restricted.  Restricting the runtime by default,
>> *especially* when setting runtime options at compile time is so much of a
>> pain, is just going to cause problems.  I'm already thinking that I may have
>> to skip ghc7.
> With current versions of GHC, to set the default RTS options you need to
> do some insanity with linking in a C stub or something absurd like that.
> However, take a look at this:
> http://www.haskell.org/ghc/docs/7.0-latest/html/users_guide/runtime-control.html#id3095435
> It appears that with GHC 7, you can just say something like
> |-with-rtsopts="-H128m -K1m"| while compiling your program, and now that
> will forever be the default RTS settings for your program.
> I haven't actually tried this myself, however. In particular, I'm not
> sure if you have to turn on the full RTS options before this will work...

Nice!  I didn't notice Ian had added that flag, and we totally forgot to 
mention it in the 7.0.1 release notes.


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