[lttng-dev] [URCU PATCH] readme: state correct GCC dependency for ARM

[Mathieu Desnoyers]

* Yannick Brosseau (yannick.brosseau at gmail.com) wrote:
> We can add a configure check for this version dependency

patch welcome,

Mathieu

> 
> On 2011-12-21 09:51, Mathieu Desnoyers wrote:
> > * Gerlando Falauto (gerlando.falauto at keymile.com) wrote:
> >> If you are trying to compile liburcu for ARM and get errors like:
> >>
> >> /usr/local/include/urcu/uatomic/generic.h:180: undefined reference to
> >> `__sync_add_and_fetch_4'
> >> usr/local/lib/liburcu-common.so: undefined reference to
> >> `__sync_lock_test_and_set_4'
> >> /usr/local/lib/liburcu.so: undefined reference to
> >> `__sync_or_and_fetch_4'
> >>
> >> please upgrade your GCC to 4.4.
> > Merged, thanks!
> >
> > Mathieu
> >
> >> ---
> >>  README |    7 ++++---
> >>  1 files changed, 4 insertions(+), 3 deletions(-)
> >>
> >> diff --git a/README b/README
> >> index ce25e3a..104ef2a 100644
> >> --- a/README
> >> +++ b/README
> >> @@ -29,7 +29,7 @@ Currently, x86 (i386, i486, i586, i686), x86 64-bit, PowerPC 32/64, S390, S390x,
> >>  ARM, Alpha, ia64 and Sparcv9 32/64 are supported. Only tested on Linux so
> >>  far, but should theoretically work on other operating systems.
> >>  
> >> -ARM depends on running a Linux kernel 2.6.15 or better.
> >> +ARM depends on running a Linux kernel 2.6.15 or better, GCC 4.4 or better.
> >>  
> >>  The gcc compiler versions 3.3, 3.4, 4.0, 4.1, 4.2, 4.3, 4.4 and 4.5 are
> >>  supported, with the following exceptions:
> >> @@ -41,8 +41,9 @@ supported, with the following exceptions:
> >>      http://www.mail-archive.com/gcc-bugs@gcc.gnu.org/msg281255.html
> >>  - gcc 3.3 cannot match the "xchg" instruction on 32-bit x86 build.
> >>    See: http://kerneltrap.org/node/7507
> >> -- Alpha, ia64 and ARM architectures depend on 4.x gcc with atomic builtins
> >> -  support.
> >> +- Alpha, ia64 and ARM architectures depend on gcc 4.x with atomic builtins
> >> +  support. For ARM this was introduced with gcc 4.4:
> >> +    http://gcc.gnu.org/gcc-4.4/changes.html
> >>  
> >>  For developers using the git tree:
> >>  
> >> -- 
> >> 1.7.1
> >>
> >>
> >> _______________________________________________
> >> lttng-dev mailing list
> >> lttng-dev at lists.lttng.org
> >> http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev
> >>
> 
> 
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-- 
Mathieu Desnoyers
Operating System Efficiency R&D Consultant
EfficiOS Inc.
http://www.efficios.com