[commit: ghc] master: comment about using "stage = 2" in build.mk (8feb281)

[Simon Marlow]

Repository : ssh://darcs.haskell.org//srv/darcs/ghc

On branch  : master

http://hackage.haskell.org/trac/ghc/changeset/8feb2813f129532b81be3ae3749af0e5acc40dae

>---------------------------------------------------------------

commit 8feb2813f129532b81be3ae3749af0e5acc40dae
Author: Simon Marlow <marlowsd at gmail.com>
Date:   Thu Aug 4 12:08:26 2011 +0100

    comment about using "stage = 2" in build.mk

>---------------------------------------------------------------

 mk/build.mk.sample |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)

diff --git a/mk/build.mk.sample b/mk/build.mk.sample
index 0d10ae8..5196a65 100644
--- a/mk/build.mk.sample
+++ b/mk/build.mk.sample
@@ -134,6 +134,15 @@ BUILD_DOCBOOK_HTML = NO
 BUILD_DOCBOOK_PS   = NO
 BUILD_DOCBOOK_PDF  = NO
 
+# After stage 1 and the libraries have been built, you can uncomment this line:
+
+# stage=2
+
+# Then stage 1 will not be touched by the build system, until
+# you uncomment the line again.  This is a useful trick for when you're
+# working on stage 2 and want to freeze stage 1 and the libraries for
+# a while.
+
 endif
 
 # -------- A Unregisterised build) -------------------------------------------