Re: Using the mkoctfile -W and -Wl options

[Richard Crozier]

On 25/06/15 17:27, JohnD wrote:
> > Message: 1
> > Date: Thu, 25 Jun 2015 14:38:44 +0100
> > From: Richard Crozier <address@hidden>
> > To: address@hidden
> > Subject: Using the mkoctfile -W and -Wl options
> > Message-ID: <address@hidden>
> > Content-Type: text/plain; charset=utf-8; format=flowed
> >
> > Hello,
> >
> > Could someone possibly provide an example of using the -W and -Wl
> arguments
> > for mkoctfile?
> >
> > "
> >        '-Wl,...'
> >             Pass flags though the linker like "-Wl,-rpath=...".  The
> >             quotes are needed since commas are interpreted as command
> >             separators.
> >
> >        '-W...'
> >             Pass flags though the compiler like "-Wa,OPTION".
> >
> > "
> >
> > For example, I tried building the provided helloworld example from the
> octave
> > manual and passing the -v parameter like so:
> >
> >   >> mkoctfile helloworld.c "-Wv"
> > gcc: error: unrecognized command line option ?-Wv?
> > warning: mkoctfile exited with failure status
> > warning: called from
> >       mkoctfile at line 171 column 5
> >   >> mkoctfile helloworld.c "-W,-v"
> > gcc: error: unrecognized command line option ?-W,-v?
> > warning: mkoctfile exited with failure status
> > warning: called from
> >       mkoctfile at line 171 column 5
> >   >> mkoctfile helloworld.c -Wv
> > gcc: error: unrecognized command line option ?-Wv?
> > warning: mkoctfile exited with failure status
> > warning: called from
> >       mkoctfile at line 171 column 5
> >
> >
> > obviously in reality I want to do more than pass this parameter, can
> someone
> > explain the right way to do these please, or point me to a more detailed
> > resource on this?
> >
> > Thanks,
> > Richard
>
> The resource would be the documentation for gcc - you are passing gcc -W
> commands to gcc at that point.

ok, I see, so is the '-W' flag only for passing gcc options that start 
with '-W', i.e. the warning flags?

The octave manual implies the W option is for passing any parameters to 
the compiler, but it's probably obvious to someone experienced that it's 
only referring to warning options.

How would I then, as an example, pass the '-O2' parameter to gcc via 
mkoctfile? Or how exactly should I call mkoctfile and pass it the '-v' 
option etc?

Richard


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