Date: Mon, 14 Apr 2014 22:34:09 +0200 From: Ralf Wenk <iz-rpi03@hs-karlsruhe.de> To: Andreas Schwarz <freebsd.asc@strcmp.org> Cc: freebsd-arm@freebsd.org Subject: Re: screen(1) crashes plus weird output for screen -ls Message-ID: <E1WZnZx-004VDY-U1@smtp.hs-karlsruhe.de> In-Reply-To: <443afb9423c.5a6681a6@mail.schwarzes.net> References: <freemail.20140405150804.40570.1@xmldata04> <E1WTAl0-004Ooa-Au@smtp.hs-karlsruhe.de> <E1WYFYa-00CDeU-Gv@smtp.hs-karlsruhe.de> <18ADCE9C-C604-4067-B4D1-32EC07499231@bsdimp.com> <E1WYM5D-008xD0-Oy@smtp.hs-karlsruhe.de> <443afb9423c.5a6681a6@mail.schwarzes.net>
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Andreas Schwarz <freebsd.asc=40strcmp.org> wrote:
> On 10.04.14, Ralf Wenk wrote:
>=20
> > I was not successful in compiling a gcc from the ports on armv6.
> > ONLY_FOR_ARCHS prohibits it. =5B...=5D
>=20
> The legacy standard freebsd gcc is still included in the source tree, y=
ou can use the=20
> WITH_GCC/WITH_GNUCXX options in scr.conf when building and installing w=
orld.
I had some minor trouble to get it going. Adding both options terminates
the build here with
-- gnu/lib/libsupc++__L ---
/root/rpi/head/gnu/lib/libsupc++/../../../contrib/libstdc++/libsupc++/eh_=
arm.cc
:44:1: error: functions that differ only in their return type cannot be=20
overloaded
__cxa_type_match(_Unwind_Exception* ue_header,
=5E
Just setting WITH_GCC got me finally a successful build.
Now back to the problem with screen on arm.
Compiling screen with gcc instead of clang using the standard optimizatio=
n
(-O) results in a correct working screen as =22screen -ls=22 prints
There is a screen on:
3164.pts-2.raspberry-pi (Detached)
1 Socket in /tmp/screens/S-pi.
while a fresh with clang -O compiled screen prints
There is a screen on:
3164.pts-2.raspberry-pi (Detached)
-1073746600 Socket
=D0=A0=E1 in =F0=F5=FF=BF8=E8.
Compiling screen with clang -O0 results in the same output as gcc.
I think this supports my idea of suspecting the clang optimizations.
The gcc used is
=24 gcc -v
Using built-in specs.
Target: armv6-undermydesk-freebsd
Configured with: FreeBSD/armv6 system compiler
Thread model: posix
gcc version 4.2.1 20070831 patched =5BFreeBSD=5D
=24
Ralf
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