cross-compiling and `orc.m4`

[Maarten Bosmans]

ping

2011/5/3 Maarten Bosmans <mkbosmans at gmail.com>:
> 2011/3/19 David Schleef <ds at entropywave.com>:
>> On Fri, Mar 11, 2011 at 01:38:28AM +0100, Paul Menzel wrote:
>>> Dear orcc folks,
>>>
>>>
>>> using OpenEmbedded [1] trying to cross-compile GStreamer plug-ins (or
>>> PulseAudio from git master), which includes `orc.m4`, `Makefile` has to be
>>> adapted as noted in `gst-plugins.inc` [2].
>>>
>>>         # orc.m4 calls pkg-config ----variable=orcc orc-0.4 to get the path to orcc,
>>>         # resulting in /usr/bin/orcc. Force it to use the staged orcc.
>>>         do_configure_append() {
>>>               for i in $(find ${S} -name "Makefile") ; do
>>>                       sed -i -e s:${bindir}/orcc:${STAGING_BINDIR_NATIVE}/orcc:g $i
>>>               done
>>>         }
>>
>> Use 'ORCC=/usr/bin/orcc ./configure' to override ORCC.
>
> It would be nice to automatically detect when pkg-config returns a
> non-functional orcc. The attached patch for orc.m4 does this and uses
> the first orcc from $PATH when cross-compiling.
>
> Should be enough to automatically do the right thing for Paul's and my
> situation. Of course it is still overridable by setting ORCC
> explicitly.
>
> How about maintaining the m4 orc detection macro in the orc tree? Then
> there is a canonical location for other projects (gstreamer,
> pulseaudio) to look for updates of the file.
> I'd say only the ORC_CHECK part should move to the orc tree and
> ORC_OUTPUT can stay in the gstreamer tree, as we for pulseaudio do not
> use ORC_OUPUT.
>
>> This is the correct way of doing things, because the tools involved
>> (pkg-config and autoconf) don't understand the concept of building
>> a native tool when cross-compiling.
>>
>> Alternately, a build system could modify the orc-0.4.pc file when
>> cross-building orc, so that the orcc variable is set to the tool in
>> the staging directory.
>>
>> David
>
> Maarten
>
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