Patch to enable GHC runtime system with thr_debug_p options...

[Joachim Breitner]

Dear Michał,

Am Sonntag, den 02.12.2012, 22:44 +0100 schrieb "Michał J. Gajda":
> On 12/02/2012 09:20 PM, Joachim Breitner wrote:
> >> I noticed that Ubuntu, as well as Debian and original packages come
> >> without some variants of threaded debugging binaries.
> >> A recent change added of printing a stack trace with -xc option requires
> >> using both -ticky and profiling compile options,
> >> which in turn forces program to be compiled in a -debug RTS way.
> >> Since stack trace looks like indispensable debugging tool, and
> >> convenient parallelization is strength of Haskell,
> >> I wonder is there any remaining reason to leave beginners with a cryptic
> >> error message
> >> when they try to debug a parallel or threaded application, and want to
> >> take advantage of stack trace?
> >>
> >> The resulting ghc-prof package would be increased by less than 1%.
> >>
> >> Here is a patch for Ubuntu/Debian GHC 7.4.2 package, as well as upstream

--- ghc-7.4.2-orig/mk/config.mk.in	2012-06-06 19:10:25.000000000 +0200
+++ ghc-7.4.2/mk/config.mk.in	2012-12-01 00:22:29.055003842 +0100
@@ -256,7 +256,7 @@
 #   l           : event logging
 #   thr_l       : threaded and event logging
 #
-GhcRTSWays=l
+GhcRTSWays=l thr_debug_p thr_debug
 
 # Usually want the debug version
 ifeq "$(BootingFromHc)" "NO"


I notice that your patch modifies the defaults of GHC as shipped by
upstream, and I wonder if there is a reason why these ways are not
enabled by default.

Dear GHC HQ: Would you advice against or for providing a RTS in the
thr_debug_p and thr_debug ways in the Debian package?

Thanks,
Joachim


-- 
Joachim "nomeata" Breitner
Debian Developer
  nomeata at debian.org | ICQ# 74513189 | GPG-Keyid: 4743206C
  JID: nomeata at joachim-breitner.de | http://people.debian.org/~nomeata
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