From 5db3b4cff15fbcaa74c881b5dd5e39f7cade08d5 Mon Sep 17 00:00:00 2001
From: Simon Marlow <marlowsd@gmail.com>
Date: Tue, 3 Jan 2012 10:28:39 +0000
Subject: [PATCH] Don't record outputFile in the hashed flags
We don't want
ghc --make M -o <file>
to force recompilation of all modules when <file> changes. The -o
value is already taken into account by the recompilation machinery
when we check the modification time on the object file or the
executable.
---
compiler/iface/FlagChecker.hs | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/compiler/iface/FlagChecker.hs b/compiler/iface/FlagChecker.hs
index 611228e5673d..5e4a7092bfa6 100644
--- a/compiler/iface/FlagChecker.hs
+++ b/compiler/iface/FlagChecker.hs
@@ -41,7 +41,9 @@ fingerprintDynFlags DynFlags{..} nameio =
-- -i, -osuf, -hcsuf, -hisuf, -odir, -hidir, -stubdir, -o, -ohi
paths = (map normalise importPaths,
[ objectSuf, hcSuf, hiSuf ],
- [ objectDir, hiDir, stubDir, outputFile, outputHi ])
+ [ objectDir, hiDir, stubDir, outputHi ])
+ -- NB. not outputFile, we don't want "ghc --make M -o <file>"
+ -- to force recompilation when <file> changes.
-- -fprof-auto etc.
prof = if opt_SccProfilingOn then fromEnum profAuto else 0
--
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