Re: [Iaxclient-devel] static build issue (was: Re: contrib/tcl music on hold patch)

[Peter G. <jpg...@gm...>]

On Wed, Apr 23, 2008 at 2:08 AM, Mats Bengtsson <ma...@gm...> wrote:
> On Tue, Apr 22, 2008 at 4:18 PM, Peter Grayson <jpg...@gm...> wrote:
>  >  <snip>
>
> >
>  >  You don't give many clues as to what might be going wrong. Do you set
>  >  the PKG_CONFIG_PATH when you configure iaxclient? Where do iaxclient's
>  >  dependencies get installed? /usr/local? Do you have different versions
>  >  of speex, portaudio, etc. installed in /usr/lib?
>  >
>
>  Perhaps I can provide some detailed info of the current state of the
>  build environment.
>  Note that I did 'updatedb' to get fresh 'locate' results.
>
>  linux:/usr/local/lib/pkgconfig # env | grep PKG
>  PKG_CONFIG_PATH=/usr/local/lib/pkgconfig:/usr/local/share/pkgconfig:/usr/lib/pkgconfig:/usr/share/pkgconfig:/opt/kde3/lib/pkgconfig:/opt/gnome/lib/pkgconfig:/opt/gnome/lib/pkgconfig:/opt/gnome/share/pkgconfig
>  linux:/usr/local/lib/pkgconfig # ll  | grep speex
>  -rw-r--r--   1 root root  321210 Apr 16 16:04 libspeex.a
>  -rwxr-xr-x   1 root root     763 Apr 16 16:04 libspeex.la
>  -rw-r--r--   1 root root  217008 Apr 16 16:04 libspeexdsp.a
>  -rwxr-xr-x   1 root root     772 Apr 16 16:04 libspeexdsp.la
>  linux:/usr/local/lib/pkgconfig # locate libspeex
>  /usr/local/lib/libspeex.a
>  /usr/local/lib/libspeex.la
>  /usr/local/lib/libspeexdsp.a
>  /usr/local/lib/libspeexdsp.la
>  linux:/usr/local/lib/pkgconfig # locate portaudio
>  /usr/lib/ooo-2.0/program/libportaudio.so
>  /usr/lib/ooo-2.0/program/libportaudio.so.0
>  /usr/lib/ooo-2.0/program/libportaudio.so.0.0.18
>  /usr/local/include/portaudio.h
>  /usr/local/lib/libportaudio.a
>  /usr/local/lib/libportaudio.la
>  /usr/local/lib/pkgconfig/portaudio-2.0.pc

Okay, so you've got just the static libraries installed in /usr/local
-- that's good.

>  linux:/usr/local/lib/pkgconfig # cat *
>  prefix=/usr/local
>  exec_prefix=${prefix}
>  libdir=${exec_prefix}/lib
>  includedir=${prefix}/include
>
>  Name: iaxclient
>  Description: Inter-Asterisk eXchange Client Library
>  Version: 2.x-trunk
>  Libs: -L${libdir} -liaxclient
>  Libs.private:
>  Cflags: -I${includedir}
>  Requires.private: portaudio-2.0 speex
>
>  prefix=/usr/local
>  exec_prefix=${prefix}
>  libdir=${exec_prefix}/lib
>  includedir=${prefix}/include
>
>  Name: PortAudio
>  Description: Portable audio I/O
>  Requires:
>  Version: 19
>
>  Libs: -L${libdir} -lportaudio  -lm -lpthread
>  Cflags: -I${includedir} -pthread
>  # libspeex pkg-config source file
>
>  prefix=/usr/local
>  exec_prefix=${prefix}
>  libdir=${exec_prefix}/lib
>  includedir=${prefix}/include
>
>  Name: speex
>  Description: Speex is an audio codec tuned for speech
>  Version: 1.2beta3
>  Requires:
>  Conflicts:
>  Libs: -L${libdir} -lspeex -lm
>  Cflags: -I${includedir}
>  # libspeexdsp pkg-config source file
>
>  prefix=/usr/local
>  exec_prefix=${prefix}
>  libdir=${exec_prefix}/lib
>  includedir=${prefix}/include
>
>  Name: speexdsp
>  Description: Speexdsp is a speech processing library that goes along
>  with the Speex codec
>  Version: 1.2beta3
>  Requires:
>  Conflicts:
>  Libs: -L${libdir} -lspeexdsp -lm
>  Cflags: -I${includedir}

And the .pc files are in their correct place too. Looking at
contrib/tcl/configure.in, I notice three things:

1) There is no use of the PKG_CHECK_MODULES macro
2) The library dependencies are hardcoded (portaudio, speex, speexdsp,
and iaxclient)
3) The libraries are listed in the opposite order that they should be
-- this could lead to missing symbols.

The TEA_ADD_LIBS line should list the libraries in this order:
-liaxclient -lportaudio -lspeex -lspeexdsp.

>  It seems that speex is indeed statically linked but still missing (at
>  least) one speex symbol:
>
>  linux:~/C/voip/iaxclient/trunk/contrib/tcl # ldd libtcliaxclient0.2.so
>
>         linux-gate.so.1 =>  (0xffffe000)
>         libpthread.so.0 => /lib/tls/libpthread.so.0 (0x40052000)
>         libasound.so.2 => /usr/lib/libasound.so.2 (0x40065000)
>         libc.so.6 => /lib/tls/libc.so.6 (0x40123000)
>
>         /lib/ld-linux.so.2 (0x80000000)
>         libm.so.6 => /lib/tls/libm.so.6 (0x40242000)
>         libdl.so.2 => /lib/libdl.so.2 (0x40268000)
>         libresmgr.so.1 => /lib/libresmgr.so.1 (0x4026c000)

I am assuming that you are missing the same symbol Andrea mentioned in
his last email: speex_preprocess_ctl.

>  >  You should know that this whole exercise of building a shared object
>  >  with no shared object dependencies is much like swimming upstream. The
>  >  build tools are all geared towards either building things statically
>  >  or building things shared, but not mixing the two in this way. I am
>  >  curious as to why it is so important to avoid these dynamic link
>  >  dependencies -- especially on linux?
>  >
>
>  We must be sure of which versions of speex and portaudio we are using
>  to avoid the "dll hell".
>  This is not so strange since it is exactly how it worked with the old
>  iaxclient build system
>  where speex and portaudio were compiled together with iaxclient code.

I don't think it's so strange to want to statically link like this.
However, this static linking paradigm conflicts with what a downstream
distribution packager would need to ship this package with a Linux
distribution. I didn't know if you were concerned about helping
potential downstream packagers.

Pete