Re: [Discuss-gnuradio] gr-audio-oss - OSS API emulation on NetBSD

[Berndt Josef Wulf]

On Thursday 04 November 2004 02:07, Eric Blossom wrote:
> On Wed, Nov 03, 2004 at 08:06:59PM +1030, Berndt Josef Wulf wrote:
> > G'day,
> >
> > From a quick read on the Internet I understand that the OSS API  ioctl
> > calls are supported by the Linux kernel. This is not the case on NetBSD
> > which uses the libossaudio library requiring passing linker option
> > -lossaudio.
> >
> > Would it be possible to have autoconfig check for the libossaudio library
> > and if so, add the -lossaudio linker option in module gr-audio-oss?
> >
> > e.g.
> >
> > AC_CHECK_LIBRARY(ossaudio,....
>
> No problem.  Please determine the name of a function in the ossaudio
> library.  The autoconf macro AC_CHECK_LIB looks for a particular
> function in a library.
>
> You can get the list of symbols in a static library with nm.  For
> symbols in a shared library use nm --dynamic.  Pick a symbol with a
> "T" in the second column, preferably one that looks like it's not just
> an implementation detail subject to change.
>
> Once you've determined a function, add this to configure.ac
>
> dnl find this original code.
> PKG_CHECK_MODULES(GNURADIO_CORE, gnuradio-core >= 2)
> LIBS="$LIBS $GNURADIO_CORE_LIBS"
>
> dnl The add your new code right after it
> AC_CHECK_LIB(ossaudio,NAME_OF_FUNCTION_IN_LIBRARY)
>
>
> Then ./bootstrap && ./configure --enable-maintainer-mode && make
>
> If it works, send the the patch and I'll test on GNU/Linux to make
> sure we haven't broken anything.

Done, there are two ways this can be done, both resulting in -lossaudio passed 
on by the $LIB variable:


----------------------------- using AC_CHECK_LIB  ----------------------------

--- configure.ac.orig   2004-11-04 05:21:27.000000000 +1030
+++ configure.ac        2004-11-04 05:28:20.000000000 +1030
@@ -83,6 +83,8 @@
 PKG_CHECK_MODULES(GNURADIO_CORE, gnuradio-core >= 2)
 LIBS="$LIBS $GNURADIO_CORE_LIBS"

+AC_CHECK_LIB(ossaudio, _oss_ioctl)
+
 dnl check for oss header...
 AC_CHECK_HEADER(sys/soundcard.h,
   [],
------------------------------------------------------------------------------------

---------------------------- using AC_HAVE_LIBRARY  --------------------------

--- configure.ac.orig   2004-11-04 05:21:27.000000000 +1030
+++ configure.ac        2004-11-04 05:31:58.000000000 +1030
@@ -83,6 +83,8 @@
 PKG_CHECK_MODULES(GNURADIO_CORE, gnuradio-core >= 2)
 LIBS="$LIBS $GNURADIO_CORE_LIBS"

+AC_HAVE_LIBRARY(ossaudio)
+
 dnl check for oss header...
 AC_CHECK_HEADER(sys/soundcard.h,
   [],
------------------------------------------------------------------------------------

both resulting into:

husky: {549} ldd src/.libs/_audio_oss.so
src/.libs/_audio_oss.so:
        -lpthread.0 => /usr/lib/libpthread.so.0
        -lgrswigrunpy.0 => /usr/pkg/lib/libgrswigrunpy.so.0
        -lossaudio.0 => /usr/lib/libossaudio.so.0                  <----- 
        -lstdc++.5 => /usr/lib/libstdc++.so.5
        -lm.0 => /usr/lib/libm387.so.0
        -lm.0 => /usr/lib/libm.so.0
        -lgcc_s.1 => /usr/lib/libgcc_s.so.1
        -lcppunit-1.10.2 => /usr/pkg/lib/libcppunit-1.10.so.2
        -lfftw3f.3 => /usr/pkg/lib/libfftw3f.so.3
        -lgnuradio-core.0 => /usr/pkg/lib/libgnuradio-core.so.0



73, Berndt
VK5ABN
-- 
Name : Berndt Josef Wulf  | +++ With BSD on Packet Radio +++
E-Mail : wulf at ping dot net dot au |    tfkiss, tnt, dpbox, wampes
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