From: Simon Marlow <simonmar@microsoft.com>
Date: Thu, 23 Mar 2006 13:45:14 +0000 (+0000)
Subject: work around a gcc 4.1.0 codegen bug in -O2 by forcing -O1 for GHC.Show
X-Git-Tag: directory_2007-05-24~316
X-Git-Url: http://git.megacz.com/?a=commitdiff_plain;h=e8ceccfea9c447b898dae9ff2df4a943bbf62bd8;p=haskell-directory.git

work around a gcc 4.1.0 codegen bug in -O2 by forcing -O1 for GHC.Show
See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26824
---

diff --git a/Makefile b/Makefile
index cf5917c..6078fba 100644
--- a/Makefile
+++ b/Makefile
@@ -48,6 +48,10 @@ SRC_HSC2HS_OPTS += -Iinclude -I$(FPTOOLS_TOP)/ghc/includes
 # ESSENTIAL, for getting reasonable performance from the I/O library:
 SRC_HC_OPTS += -funbox-strict-fields
 
+# Grrr, gcc-4.1.0 has a bug in -O2 and higher that causes miscompilation of
+# GHC.Show.itos.  See gcc bug #26824.  We must drop back to -O1.
+GHC/Show_HC_OPTS += -optc-O1
+
 # -----------------------------------------------------------------------------
 # PrimOpWrappers