Bug 289909

Summary:	sys-devel/gcc-4.3.4 uses several GB RAM when compiling dev-libs/boehm-gc-7.1 with -funroll-loops
Product:	Gentoo Linux	Reporter:	Mike Nelson <miken700>
Component:	New packages	Assignee:	Gentoo Toolchain Maintainers <toolchain>
Status:	RESOLVED WONTFIX
Severity:	normal	CC:	SebastianLuther
Priority:	High
Version:	unspecified
Hardware:	x86
OS:	Linux
Whiteboard:
Package list:		Runtime testing required:	---
Attachments:	emerge --info

Description Mike Nelson 2009-10-20 20:16:31 UTC

emerge -1 dev-libs/boehm-gc
fails,
# grep ^CFLAGS /etc/make.conf
# CFLAGS='-O3 -march=pentium4  -fprefetch-loop-arrays -pipe' emerge -1 dev-libs/boehm-gc

works. Seems like -funroll-loops needs to be stripped for this.

See my original forum post for details on error,
http://forums.gentoo.org/viewtopic-p-6022008.html#6022008


Reproducible: Always

Steps to Reproduce:
1.emerge -1 dev-libs/boehm-gc

Comment 1 Mike Nelson 2009-10-20 20:19:05 UTC

Created attachment 207732 [details]
emerge --info

Comment 2 Sebastian Luther (few) 2009-10-20 20:24:01 UTC

That looks more like, the option would make gcc consume all your memory. How much ram does this machine have?

Comment 3 Mike Nelson 2009-10-20 21:55:39 UTC

(In reply to comment #2)
> That looks more like, the option would make gcc consume all your memory. How
> much ram does this machine have?
> 

Exactly. It's running with 4G RAM and 1G of swap.

Comment 4 Sebastian Luther (few) 2009-10-21 06:57:41 UTC

That sounds like a gcc bug.

Comment 5 Mike Nelson 2009-10-21 15:00:15 UTC

Note, to fix this for me I created the file /etc/portage/env/dev-libs/boehm-gc with this line,

CFLAGS=${CFLAGS/-funroll-loops/}

Comment 6 Ryan Hill (RETIRED) gentoo-dev

2011-07-01 05:34:52 UTC

If using non-standard flags breaks things then don't use them.  Give 4.3.6 or later a try.