On Oct 22, 2016, at 10:35, Craig Treleaven wrote:
>
> I’m working on an update to Lirc and the build system has changed to
> Autotools--which I know very little about.
>
> It seems that Lirc will now opportunistically link with Alsa and there is no
> configure flag to disable such behaviour. I want to make Alsa support a
> non-default variant. Is my best option to patch the configure.ac file?
>
> I believe the relevant portion of configure.ac is:
>
> dnl audio_alsa driver requires ALSA library installed and some linker flags
> have_alsa=no
> AC_CHECK_HEADERS(alsa/asoundlib.h,[
> AC_CHECK_LIB(asound, snd_pcm_open,[
>AM_CONDITIONAL([BUILD_LIBALSA],[true])
>AC_DEFINE(HAVE_LIBALSA)
>have_alsa=yes
>],[
>AM_CONDITIONAL([BUILD_LIBALSA],[false])],
>)
>],[
>AM_CONDITIONAL([BUILD_LIBALSA],[false])]
> )
>
> From:
> https://sourceforge.net/p/lirc/git/ci/lirc-0_9_4c/tree/configure.ac
>
> What exactly would I patch in to ignore Alsa?
Usually, after running configure, you can find ac_cv_ variables in the
config.log or config.h file representing the feature you're interested in. You
can then supply a name=value configure argument to override it with whatever
value you want.
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