ALSA Dependency - Is it necessary?

[Andrew John Hughes]

On 10/02/2008, Andrew John Hughes <gnu_andrew at member.fsf.org> wrote:
> On 10/02/2008, Michael Franz <mvfranz at gmail.com> wrote:
> > Mario,
> >
> >
> > > You could patch IcedTea to not use ALSA. It's some boring work of
> > > compile, remove, recompile, re-remove... but in the end, it's just to
> > > erase any native file that uses it for now. One example of code that
> > > make use of ALSA for sure is the Sound API.
> > >
> > > Let me know if you need help (I don't have access to a Mac and not much
> > > free time though).
> > >
> > > Mario
> >
> > The first step that would be appreciated would be a way to turn of the check
> > for ALSA in configure.  Due to the way I am building this (via macports) I
> > have to manually remove the ALSA check in configure.ac then run autoconf and
> > then configure.  If I could just pass --disable-alsa my process would be
> > simplified.
> >
> > I initially started using icedtea 1.5 and am not using a snapshop of head.
> >
> > Michael
>
> This is only possible to do easily if the OpenJDK build underlying
> IcedTea actually supports a DISABLE_ALSA option.  Although you can add
> --disable-alsa to autoconf easily enough on IcedTea, the actual ALSA
> requirement comes from OpenJDK which doesn't the autotools but rather
> a series of Makefiles.  You'd need support in these Makefiles to be
> able to disable ALSA (a DISABLE_ALSA build variable just like BOOTDIR
> and the rest).  If that doesn't exist, it's a case of going through
> the Makefiles manually and adding such support.
>
> That said, I guess there will be other problems with the OpenJDK build
> given it hasn't been tested on or ported to Mac OS X.  Getting past
> IcedTea's configure is only the beginning.
> --
> Andrew :-)
>
> Support Free Java!
> Contribute to GNU Classpath and the OpenJDK
> http://www.gnu.org/software/classpath
> http://openjdk.java.net
>

Further to that, the bit of OpenJDK you want to look at is:

j2se/make/javax/sound/Makefile:    # ALSA handles directaudio, ports, and MIDI
j2se/make/javax/sound/Makefile:    SUBDIRS += jsoundalsa
j2se/make/javax/sound/Makefile:    EXTRA_SOUND_JNI_LIBS += jsoundalsa

You also need to disable the part of the sanity check that looks for ALSA:

j2se/make/common/shared/Sanity.gmk:       if [ `$(ALSA_VERSION_CHECK)
| $(EGREP) -c '$(REQUIRED_ALSA_VERSION)'` -ne 1 ] ; then \
j2se/make/common/shared/Sanity.gmk:         $(ECHO) "ERROR: The ALSA
version must be 0.9.1 or higher. \n" \

--
Andrew :-)

Support Free Java!
Contribute to GNU Classpath and the OpenJDK
http://www.gnu.org/software/classpath
http://openjdk.java.net