From 725968162ab3a8c00c3f7f14ff377e5ded7cd090 Mon Sep 17 00:00:00 2001
From: simonmar <unknown>
Date: Tue, 30 Nov 2004 15:31:56 +0000
Subject: [PATCH] [project @ 2004-11-30 15:31:56 by simonmar] Allow
 -ignore-package P when P doesn't exist (thanks to George
 Russell for the report).

---
 ghc/compiler/main/Packages.lhs |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/ghc/compiler/main/Packages.lhs b/ghc/compiler/main/Packages.lhs
index 8a317c0..5e0cfa1 100644
--- a/ghc/compiler/main/Packages.lhs
+++ b/ghc/compiler/main/Packages.lhs
@@ -267,8 +267,10 @@ mkPackageState dflags pkg_db = do
 		(ps,_)   -> multiplePackagesErr str ps
 	procflags pkgs expl (IgnorePackage str : flags) = do
 	   case partition (matches str) pkgs of
-		([],_)  -> missingPackageErr str
 		(ps,qs) -> procflags qs expl flags
+		-- missing package is not an error for -ignore-package,
+		-- because a common usage is to -ignore-package P as
+		-- a preventative measure just in case P exists.
 
 	-- A package named on the command line can either include the
 	-- version, or just the name if it is unambiguous.
-- 
1.7.10.4