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To: kabaev@gmail.com
From: "M. Warner Losh" <imp@bsdimp.com>
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Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org,
	src-committers@freebsd.org, davidxu@freebsd.org
Subject: Re: svn commit: r212630 - in head/lib/libthr: . thread
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In message: <20100914231728.33ca7466@kan.dnsalias.net>
            Alexander Kabaev <kabaev@gmail.com> writes:
: On Wed, 15 Sep 2010 02:56:33 +0000 (UTC)
: David Xu <davidxu@FreeBSD.org> wrote:
: 
: > Author: davidxu
: > Date: Wed Sep 15 02:56:32 2010
: > New Revision: 212630
: > URL: http://svn.freebsd.org/changeset/base/212630
: > 
: > Log:
: >   add code to support stack unwinding when thread exits. note that
: > only defer-mode cancellation works, asynchrnous mode does not work
: > because it lacks of libuwind's support. stack unwinding is not
: > enabled unless LIBTHR_UNWIND_STACK is defined in Makefile.
: > 
: > Modified:
: >   head/lib/libthr/Makefile
: >   head/lib/libthr/thread/thr_clean.c
: >   head/lib/libthr/thread/thr_create.c
: >   head/lib/libthr/thread/thr_exit.c
: >   head/lib/libthr/thread/thr_init.c
: >   head/lib/libthr/thread/thr_private.h
: > 
: > Modified: head/lib/libthr/Makefile
: > ==============================================================================
: > --- head/lib/libthr/Makefile	Wed Sep 15 01:21:30 2010
: > (r212629) +++ head/lib/libthr/Makefile	Wed Sep 15 02:56:32
: > 2010	(r212630) @@ -25,6 +25,14 @@
: > CFLAGS+=-I${.CURDIR}/../../libexec/rtld-
: > CFLAGS+=-I${.CURDIR}/../../libexec/rtld-elf/${MACHINE_CPUARCH}
: > CFLAGS+=-I${.CURDIR}/../libthread_db CFLAGS+=-Winline
: > +
: > +LIBTHR_UNWIND_STACK=yes
: > +
: > +.ifdef LIBTHR_UNWIND_STACK
: > +CFLAGS+=-I${.CURDIR}/../../contrib/gcc -fexceptions 
: > +CFLAGS+=-D_PTHREAD_FORCED_UNWIND
: > +.endif
: > +
: >
: 
: Reaching into bowels of GCC like that is never good.

Would this pulling in GPL'd code?

Warner