DPH-setting in mk/build.mk (was: HEADS-UP: Git submodule conversion imminent)

[Simon Peyton Jones]

Good to document this in our building guide somewhere.  
https://ghc.haskell.org/trac/ghc/wiki/Building/Using perhaps

Simon

| -----Original Message-----
| From: ghc-devs [mailto:ghc-devs-bounces at haskell.org] On Behalf Of
| Herbert Valerio Riedel
| Sent: 01 July 2014 10:19
| To: Jan Stolarek
| Cc: ghc-devs at haskell.org
| Subject: DPH-setting in mk/build.mk (was: HEADS-UP: Git submodule
| conversion imminent)
| 
| On 2014-06-30 at 08:45:57 +0200, Jan Stolarek wrote:
| > Herbert, all,
| >
| > I just pulled the new HEAD and have a question which I believe was not
| > addressed so far. In my work on the GHC tree I never pulled the dph
| > subrepo because the only thing it adds for me is extra build time (of
| > course I pull it for my validation tree because I have no choice). Now
| > it seems that getting rid of dph is not that simple. If I `rm -df
| > libraries/dph` then it gets restored after `./sync-all pull`. Running
| > `rm -df libraries/dph/*` seems to prevent that but I imagine there
| > will be problems if the dph submodule actually gets modified and I try
| > to pull the latest version. Moreover in both cases `git status` lists
| the submodule content as modified, which I see as noise.  So is there a
| good way of removing dph from the source tree?
| 
| You probably haven't seen
| 
| 
| http://git.haskell.org/ghc.git/commit/88d85aa65ea15d984bf207f82d99928eda
| 0b6c26
| 
| yet, which now provides a way to disable DPH via mk/build.mk
| 
| 
| It may be worth considering setting BUILD_DPH=NO in some of the quick-
| build templates in mk/build.mk, but I didn't want to change anything w/o
| discussion here first.
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