* [Buildroot] [Bug 6230] New: Cannot compile gcc without threads
@ 2013-05-04 5:11 bugzilla at busybox.net
2013-05-04 5:13 ` [Buildroot] [Bug 6230] " bugzilla at busybox.net
` (5 more replies)
0 siblings, 6 replies; 7+ messages in thread
From: bugzilla at busybox.net @ 2013-05-04 5:11 UTC (permalink / raw)
To: buildroot
https://bugs.busybox.net/show_bug.cgi?id=6230
Summary: Cannot compile gcc without threads
Product: buildroot
Version: 2012.08
Platform: PC
OS/Version: Linux
Status: NEW
Severity: minor
Priority: P5
Component: Other
AssignedTo: unassigned at buildroot.uclibc.org
ReportedBy: a.nielsen at shikadi.net
CC: buildroot at uclibc.org
Estimated Hours: 0.0
Created attachment 4874
--> https://bugs.busybox.net/attachment.cgi?id=4874
buildroot config to generate error
Since uClibc can't be compiled with threads (bug 6224), it must be compiled
without thread support.
However then gcc-final can't be compiled because it cannoy find pthread.h:
In file included from buildroot/toolchain/gcc-4.8.0/libgcc/gthr.h:148:0,
from buildroot/toolchain/gcc-4.8.0/libgcc/libgcov.c:31:
./gthr-default.h:35:21: fatal error: pthread.h: No such file or directory
#include <pthread.h>
^
compilation terminated.
make[3]: *** [_gcov.o] Error 1
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* [Buildroot] [Bug 6230] Cannot compile gcc without threads
2013-05-04 5:11 [Buildroot] [Bug 6230] New: Cannot compile gcc without threads bugzilla at busybox.net
@ 2013-05-04 5:13 ` bugzilla at busybox.net
2014-02-13 13:51 ` bugzilla at busybox.net
` (4 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: bugzilla at busybox.net @ 2013-05-04 5:13 UTC (permalink / raw)
To: buildroot
https://bugs.busybox.net/show_bug.cgi?id=6230
--- Comment #1 from Adam Nielsen <a.nielsen@shikadi.net> 2013-05-04 05:13:21 UTC ---
Created attachment 4880
--> https://bugs.busybox.net/attachment.cgi?id=4880
uClibc config, generated through buildroot
Add uClibc config for MMU-less with no thread support
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* [Buildroot] [Bug 6230] Cannot compile gcc without threads
2013-05-04 5:11 [Buildroot] [Bug 6230] New: Cannot compile gcc without threads bugzilla at busybox.net
2013-05-04 5:13 ` [Buildroot] [Bug 6230] " bugzilla at busybox.net
@ 2014-02-13 13:51 ` bugzilla at busybox.net
2014-02-13 14:38 ` [Buildroot] [Bug 6230] Cannot compile gcc without threads (uClibc-based) bugzilla at busybox.net
` (3 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: bugzilla at busybox.net @ 2014-02-13 13:51 UTC (permalink / raw)
To: buildroot
https://bugs.busybox.net/show_bug.cgi?id=6230
--- Comment #2 from Thomas De Schampheleire <patrickdepinguin+buildroot@gmail.com> 2014-02-13 13:51:49 UTC ---
I tried reproducing the problem, and get failures in uclibc, even with your
proposed .config:
In file included from libpthread/nptl/sysdeps/unix/sysv/linux/arm/fork.c:31:0:
libpthread/nptl/sysdeps/unix/sysv/linux/arm/../fork.c:61:17: error: 'fork'
undeclared here (not in a function)
extern __typeof(fork) __libc_fork;
^
libpthread/nptl/sysdeps/unix/sysv/linux/arm/../fork.c:63:1: error:
'__libc_fork' redeclared as different kind of symbol
__libc_fork (void)
^
libpthread/nptl/sysdeps/unix/sysv/linux/arm/../fork.c:61:23: note: previous
declaration of '__libc_fork' was here
extern __typeof(fork) __libc_fork;
^
In file included from ./include/tls.h:6:0,
from libpthread/nptl/sysdeps/unix/sysv/linux/arm/fork.c:23:
libpthread/nptl/sysdeps/unix/sysv/linux/arm/../fork.c: In function
'__libc_fork':
./libpthread/nptl/sysdeps/arm/tls.h:114:11: warning: implicit declaration of
function '__builtin_thread_pointer' [-Wimplicit-function-declaration]
((struct pthread *)__builtin_thread_pointer () - 1)
^
./include/bits/stdio-lock.h:42:22: note: in expansion of macro 'THREAD_SELF'
void *__meself = THREAD_SELF; \
^
./include/bits/uClibc_mutex.h:96:50: note: in expansion of macro
'_IO_lock_lock'
#define __UCLIBC_IO_MUTEX_LOCK_CANCEL_UNSAFE(M) _IO_lock_lock(M)
^
libpthread/nptl/sysdeps/unix/sysv/linux/arm/../fork.c:127:3: note: in expansion
of macro '__UCLIBC_IO_MUTEX_LOCK_CANCEL_UNSAFE'
__UCLIBC_IO_MUTEX_LOCK_CANCEL_UNSAFE(_stdio_openlist_add_lock);
^
In any case, something is definitely broken here...
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* [Buildroot] [Bug 6230] Cannot compile gcc without threads (uClibc-based)
2013-05-04 5:11 [Buildroot] [Bug 6230] New: Cannot compile gcc without threads bugzilla at busybox.net
2013-05-04 5:13 ` [Buildroot] [Bug 6230] " bugzilla at busybox.net
2014-02-13 13:51 ` bugzilla at busybox.net
@ 2014-02-13 14:38 ` bugzilla at busybox.net
2014-05-06 20:23 ` bugzilla at busybox.net
` (2 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: bugzilla at busybox.net @ 2014-02-13 14:38 UTC (permalink / raw)
To: buildroot
https://bugs.busybox.net/show_bug.cgi?id=6230
Thomas De Schampheleire <patrickdepinguin+buildroot@gmail.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|Cannot compile gcc without |Cannot compile gcc without
|threads |threads (uClibc-based)
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* [Buildroot] [Bug 6230] Cannot compile gcc without threads (uClibc-based)
2013-05-04 5:11 [Buildroot] [Bug 6230] New: Cannot compile gcc without threads bugzilla at busybox.net
` (2 preceding siblings ...)
2014-02-13 14:38 ` [Buildroot] [Bug 6230] Cannot compile gcc without threads (uClibc-based) bugzilla at busybox.net
@ 2014-05-06 20:23 ` bugzilla at busybox.net
2014-05-07 7:22 ` bugzilla at busybox.net
2014-07-16 17:01 ` bugzilla at busybox.net
5 siblings, 0 replies; 7+ messages in thread
From: bugzilla at busybox.net @ 2014-05-06 20:23 UTC (permalink / raw)
To: buildroot
https://bugs.busybox.net/show_bug.cgi?id=6230
--- Comment #3 from Gustavo Zacarias <gustavo@zacarias.com.ar> 2014-05-06 20:23:31 UTC ---
ARM nommu support is broken in general, there are several toolchain component
version restrictions that are currently unaccounted for.
Not only that but the toolchain build rules aren't properly done (the tuple is
wrong for example).
The problem is that Qemu doesn't emulate any usable (uc)linux hardware to test
with, and probably the most experienced devels who can help with this lack any
real nommu hardware that's tested with uclinux as a starting point.
Also it's probably more useful to work on modern ARM nommu support (Cortex M
series) but in general from some quick investigations i've done it's mostly
stuck with an oldish and heavily tweaked 2.6.33ish kernel.
So for ARM7TDMI who knows which kernel works properly.
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* [Buildroot] [Bug 6230] Cannot compile gcc without threads (uClibc-based)
2013-05-04 5:11 [Buildroot] [Bug 6230] New: Cannot compile gcc without threads bugzilla at busybox.net
` (3 preceding siblings ...)
2014-05-06 20:23 ` bugzilla at busybox.net
@ 2014-05-07 7:22 ` bugzilla at busybox.net
2014-07-16 17:01 ` bugzilla at busybox.net
5 siblings, 0 replies; 7+ messages in thread
From: bugzilla at busybox.net @ 2014-05-07 7:22 UTC (permalink / raw)
To: buildroot
https://bugs.busybox.net/show_bug.cgi?id=6230
--- Comment #4 from Thomas Petazzoni <thomas.petazzoni@free-electrons.com> 2014-05-07 07:22:28 UTC ---
I recently got my hand on an EFM32 development board, which has a Cortex-M3
capable of running a mainline Linux kernel. Using this, I'm hoping to
progressively improve the support for ARM noMMU in Buildroot. Probably a topic
for the next release cycle, though.
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* [Buildroot] [Bug 6230] Cannot compile gcc without threads (uClibc-based)
2013-05-04 5:11 [Buildroot] [Bug 6230] New: Cannot compile gcc without threads bugzilla at busybox.net
` (4 preceding siblings ...)
2014-05-07 7:22 ` bugzilla at busybox.net
@ 2014-07-16 17:01 ` bugzilla at busybox.net
5 siblings, 0 replies; 7+ messages in thread
From: bugzilla at busybox.net @ 2014-07-16 17:01 UTC (permalink / raw)
To: buildroot
https://bugs.busybox.net/show_bug.cgi?id=6230
Thomas De Schampheleire <patrickdepinguin@gmail.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |WONTFIX
--- Comment #5 from Thomas De Schampheleire <patrickdepinguin@gmail.com> 2014-07-16 17:01:36 UTC ---
Support for ARM(7TDMI/720T/740T) has been dropped from buildroot with commit
http://git.buildroot.org/buildroot/commit/?id=befab216a29927f598e0a3ba0b012f7e822bb235
Commit message is:
" arch/arm: drop ARM(7TDMI/720T/740T) support
The toolchain currently doesn't build for nommu ARM and is in need of
serious work.
Problem is there are no emulation targets and real ARM(7TDMI/720T/740T)
hardware that's capable of running linux (enough memory, having a
memory controller...) is VERY rare and uses very old versions to
make it usable.
The ARM nommu focus should go into Cortex M series processors that are
obtainable at reasonable cost on modern hardware that has external
memory controllers.
"
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2013-05-04 5:11 [Buildroot] [Bug 6230] New: Cannot compile gcc without threads bugzilla at busybox.net
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2014-02-13 13:51 ` bugzilla at busybox.net
2014-02-13 14:38 ` [Buildroot] [Bug 6230] Cannot compile gcc without threads (uClibc-based) bugzilla at busybox.net
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