libpthread vs libthr.

[Norikatsu Shigemura]

On Sat, 11 Nov 2006 12:33:37 -0500 (EST)
Daniel Eischen <deischen at freebsd.org> wrote:
> The way to fix this for the above problem is to enable symbol
> versioning (set SYMVER_ENABLED=yes in /etc/make.conf) and rebuild
> world.  Then rebuild your ports.  After that, all your ports will
> reference symbols in FBSD_1_0, and if libthr doesn't provide
> sched_yield at FBSD_1_0, it'll find it in libc.

	I don't know that this issue will fix.  But I know many problems
	with SYMVER_ENABLED=yes.

	1. java_vm is too unstable.
	   I couldn't compile OOo (editors/openoffice.org-2.0) once.
	   However, in disabled SYMVER_ENABLED=yes environment,
	   I could compile OOo once.

	2. some gtk applications are too unstable.
	   scim (textproc/scim and japanese/scim-canna) would crash
	   unexpenctedly.

	3. firefox (www/firefox) cannot connect(2) to servers.
	   firefox issue connect(2) system call.  But it failed.

	4. synergys (sysutils/synergy) is locked.
	   synergyc connected to synergys, and synergys was locked.

	I already reported above issues:
	http://lists.freebsd.org/pipermail/freebsd-current/2006-July/064605.html

	These issues are available with SYMVER_ENABLE=yes.  So I disabled
	SYMVER_ENABLE=yes, and these issues are fixed.