kern/118121: RELENG_7 kernel compile fails with -Os
Heikki Suonsivu
hsu at bbnetworks.net
Mon Nov 19 03:50:03 PST 2007
>Number: 118121
>Category: kern
>Synopsis: RELENG_7 kernel compile fails with -Os
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Mon Nov 19 11:50:02 UTC 2007
>Closed-Date:
>Last-Modified:
>Originator: Heikki Suonsivu
>Release: FreeBSD 7.0-BETA3 i386
>Organization:
bbnetworks.net
>Environment:
System: FreeBSD joutseno.wlansystems.com 7.0-BETA3 FreeBSD 7.0-BETA3 #3: Sun Nov 18 02:20:02 EET 2007 hsu at joutseno.wlansystems.com:/usr/obj/usr/src/sys/GENERIC i386
Anything with RELENG_7, if compiling GENERIC with -Os
>Description:
When compiling kernel with -Os, gcc apparently finds some new
possible warnings (possible uninitialized variables, etc). This exits
kernel compile. -O2 does not trigger these.
scsi_sa and scsi_ses were among the offending files, but there
may be more.
>How-To-Repeat:
build kernel with COPTFLAGS set to -Os -g -pipe
>Fix:
The offending code may need further checks. RELENG_6 did not
have these warnings, so they apparently are related to new
code in 7.x.
Workaround is to use -O2 or -O
>Release-Note:
>Audit-Trail:
>Unformatted:
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