Re: Build failing on SLES 11.2

[Peter Wu <peter () lekensteyn nl>]

On Mon, Feb 22, 2016 at 11:52:41AM +0000, João Valverde wrote:
> On 22-02-2016 10:03, Peter Wu wrote:
> > CMake also checks whether the requested compiler is Clang which is
> > not done by the autotools script. It can also fail based on certain
> > strings in the cc output (besides just checking for a non-zero status
> > code).
> >
> > For now I think you have to add a check clang too before setting the flag.
>
> Fine with me, but in that case we need a clang check that is more robust
> than AC_WIRESHARK_COMPILER_FLAGS_CHECK, not less.
>
> I'd still like to understand what the failure is here.

Older versions of gcc report an exit code of 0 even if arguments are not
recognized:

    $ echo 'int main(){}' | gcc-4.3 -xc - -Qunused-arguments; echo $?
    gcc-4.3: unrecognized option '-Qunused-arguments'
    0

Note that the output posted by Anders are not errors, it is just a
diagnostic. Compare it to gcc 5.3:

    $ echo 'int main(){}' | gcc -xc - -Qunused-arguments; echo $?
    gcc: error: unrecognized command line option ‘-Qunused-arguments’
    1

As I mentioned before, CMake can also fail a test based on the
occurrence of the "unrecognized command line option" text. Somehow you
have to teach autotools the same.

Kind regards,
Peter

> > Kind regards,
> > Peter
> > https://lekensteyn.nl
> > (pardon my brevity, top-posting and formatting, sent from my phone)
> >
> >
> > On 22 February 2016 10:06:42 CET, "João Valverde" <joao.valverde () tecnico ulisboa pt> wrote:
> > > On 22-02-2016 09:02, João Valverde wrote:
> > > > On 22-02-2016 08:55, Anders Broman wrote:
> > > > > Hi,
> > > > >
> > > > > A collegue is trying to build on SLES 11.2 but the build is failing
> > > with
> > > > > eth@linux-q645:~/plugin_dev/
> > > > > <mailto:eth@linux-q645:~/plugin_dev/OneWireshark2.10/trunk> > make
> > > > >
> > > > > /usr/bin/perl ./make-version.pl .
> > > > >
> > > > > Version configuration file version.conf not found.  Using defaults.
> > > > >
> > > > > version.h has been updated.
> > > > >
> > > > > make  all-recursive
> > > > >
> > > > > make[1]: Entering directory `/home/eth/plugin_dev/ '
> > > > >
> > > > > Making all in tools
> > > > >
> > > > > make[2]: Entering directory `/home/eth/plugin_dev/ /tools'
> > > > >
> > > > > Making all in lemon
> > > > >
> > > > > make[3]: Entering directory `/home/eth/plugin_dev/ tools/lemon'
> > > > >
> > > > >    CC     lemon-lemon.o
> > > > >
> > > > > gcc: unrecognized option '-Qunused-arguments'
> > > > >
> > > > > this is on a trunk version from sometime last week. Ideas?
> > > >
> > > > See
> > > https://code.wireshark.org/review/gitweb?p=wireshark.git;a=commit;h=3ce0e60b43770543bc5bdd4c9fdf5c1d2f6e134e
> > >
> > > I'm assuming the configure script is not performing this test correctly
> > >
> > > on your colleague's machine. Checking config.log for clues might be
> > > helpful.
> > >
> > > > > Best regards
> > > > >
> > > > > Anders
> > > ___________________________________________________________________________
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-- 
Kind regards,
Peter Wu
https://lekensteyn.nl
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