Documented in README file:
commit 9e6b9f8afa8e70854a4e09e326de45dbd7e63bef
Author: Mathieu Desnoyers <[email protected]>
Date: Mon Jul 8 12:22:00 2013 -0400
Document build work-around on MacOS X
Signed-off-by: Mathieu Desnoyers <[email protected]>
* Christian Babeux ([email protected]) wrote:
> Hi Anand,
>
> I've opened a bug for this issue [1]. My first diagnostic was incorrect.
> Configure detect the CPU as a 386, which is quite wrong. This in turns
> cause a lot of issues :
>
> This enable the x86 compat layer in liburcu which in turns barf on these:
>
> __asm__ __volatile__ ("pushfl; popl %0" : "=r" (res) : );
>
> [...]
>
> __asm__ __volatile__ ("pushl %0; popfl" : : "r" (newflags) : "cc");
>
>
> The compiler on Mac OSX has specifically been compiled to run on
> x86_64 (seen in config.log, --host=x86_64-apple-darwin11). The pushfl,
> popfl instructions are not present on x86_64, so the assembler
> fails...
>
> The workaround would be to force the build/host flag at configure time
> to this (similar to [2]) :
>
> ./configure --build=x86_64-apple-darwin11
>
> We will have to either fix this in the configure.ac script or document this
> bug.
>
> Christian
>
>
> [1] - http://bugs.lttng.org/issues/578
> [2] - https://trac.macports.org/ticket/21011
>
> On Wed, Jun 26, 2013 at 11:50 AM, Anand Buddhdev <[email protected]> wrote:
> > Hi Christian,
> >
> > Were you able to figure out from the config.log files why the
> > architecture detection wasn't working properly?
> >
> > Anand
> >
> > On 21/06/2013 20:40, Anand Buddhdev wrote:
> >
> >> Hi Christian,
> >>
> >> I've attached both here.
> >>
> >> Anand
> >>
> >> On 21/06/2013 18:51, Christian Babeux wrote:
> >>
> >>> Hmm that's really weird :/. For some reason configure detect an i386
> >>> CPU which is certainly not right. Could you post your config.log with
> >>> and without the --host flag (specifying which is which)?
> >>>
> >>> There might be some slight incompatibilities on OSX and the CPU
> >>> detection mechanism we are using...
>
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--
Mathieu Desnoyers
EfficiOS Inc.
http://www.efficios.com
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