http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46468
Summary: enabling -fomit-frame-pointer by default breaks Wine
Product: gcc
Version: 4.6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: austinengl...@gmail.com
I've noticed lately that 'winetricks -q fm20' fails on my machine. I finally
got around to running an svn bisect:
=============================================
Regression found!
Last good revision: r163193
First bad revision:
------------------------------------------------------------------------
r163196 | hjl | 2010-08-12 09:39:37 -0700 (Thu, 12 Aug 2010) | 16 lines
Turn on -fomit-frame-pointer by default for 32bit Linux/x86.
2010-08-12 H.J. Lu <hongjiu...@intel.com>
Uros Bizjak <ubiz...@gmail.com>
* config.gcc: Handle --enable-frame-pointer.
* configure.ac: Add --enable-frame-pointer.
* configure: Regenerated.
* config/i386/i386.c (USE_IX86_FRAME_POINTER): Default to 0.
(override_options): If not configured with --enable-frame-pointer,
enable -fomit-frame-pointer (but not for TARGET_MACHO or when
optimizing for size), -fasynchronous-unwind-tables and
-maccumulate-outgoing-args by default.
=============================================
so, I tried compiling wine with -fno-omit-frame-pointer, still fails. The only
way to get a working wine was to compile gcc with --enable-frame-pointer.
The wine failure isn't too helpful:
$ wine /home/austin/.wine/dosdevices/c:/winetrickstmp/setup /qt
wine client error:3b: write: Bad file descriptor
err:seh:raise_exception Unhandled exception code c0000005 flags 0 addr
0x7dd247be
wine client error:3b: write: Bad file descriptor
however, the bug seems to be gcc producing bad code unless
--enable-frame-pointer is used.
--
-Austin
