A small Mplayer + Cygwin HOWTO

Hi,

I'm attempting to build the latest mplayer from svn on
cygwin,
following as closely as possible Pekka's excellent how-to,
with the
improvements/mods suggested by Tom.  Here are links to the
original
posts, for convenience:

http://article.gmane.org/gmane.comp.video.mplayer.c
ygwin/2320
http://article.gmane.org/gmane.comp.video.mplayer.c
ygwin/2341
http://article.gmane.org/gmane.comp.video.mplayer.c
ygwin/2342

Everything seems to work swimmingly until 'make' tries to
link
everything together into the mplayer.exe executable, at
which point I
get tons of errors along the lines of:

libvo/libvo.a(vo_gl.o):vo_gl.c:(.text+0xa9): undefined
reference to
`_glViewport'

I tried disabling x11 with "--disable-x11" but
that didn't change
anything.  I've gotten the latest svn source of mplayer (as
of about 12
hours ago), and I've done a complete update and install of
anything and
everything cygwin.

Any suggestions?

Also, are there any tricks to building aac-encoding support
into
mplayer?  Specifically, is faac the vehicle folks are using
for aac
encoding?  I built faac, or at least I thought I did, and
yet I get the
following link errors (along with the libvo-type errors
mentioned
above) when building mplayer:

libavcodec/libavcodec.a(faac.o):faac.c:(.text+0x3f):
undefined
reference to `_faacEncOpen16'

Any help would be appreciated here.

Cheers,
WB

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On Fri, 15 Sep 2006 16:44:47 -0700 (PDT), Walter Belhaven
wrote:
>
>
>Hi,
>
>I'm attempting to build the latest mplayer from svn on
cygwin,
>following as closely as possible Pekka's excellent
how-to, with the
>improvements/mods suggested by Tom.  Here are links to
the original
>posts, for convenience:
>
>http://article.gmane.org/gmane.comp.video.mplayer.c
ygwin/2320
>http://article.gmane.org/gmane.comp.video.mplayer.c
ygwin/2341
>http://article.gmane.org/gmane.comp.video.mplayer.c
ygwin/2342

I use MSYS, not Cygwin. I don't know why they feel that the
Mingw32 HOWTO is 
outdated. It worked well enough for me, so if you are using
Cygwin just to 
compile MPlayer, it isn't really necessary. Anyway, your
issues may not be 
Cygwin-specific.
>
>Everything seems to work swimmingly until 'make' tries
to link
>everything together into the mplayer.exe executable, at
which point I
>get tons of errors along the lines of:
>
>libvo/libvo.a(vo_gl.o):vo_gl.c:(.text+0xa9): undefined
reference to
>`_glViewport'
>
>I tried disabling x11 with "--disable-x11"
but that didn't change
>anything.

It is looking for OpenGL libraries, not X11.

I've gotten the latest svn source of mplayer (as of about
12
>hours ago), and I've done a complete update and install
of anything and
>everything cygwin.
>
>Any suggestions?
>
I built faac, or at least I thought I did, and yet I get the
>following link errors (along with the libvo-type errors
mentioned
>above) when building mplayer:
>
>libavcodec/libavcodec.a(faac.o):faac.c:(.text+0x3f):
undefined
>reference to `_faacEncOpen16'

You built faac, but did you iremember to "make
install"? Is it in the 
compiler's search path?

General suggestions:
=============

1) Are you forcing OpenGL, faac, etc. with
--enable-<package>? Even if you 
think that the necessary headers and libraries are
installed, it is best to 
let configure detect them naturally. It it doesn't, then
check the log, then 
make the necessary changes so that configure will detect
them. For example, 
you may have to set an environment variable such as LIBS or
LDFLAGS, or a 
library-specific variable (check their docs).

For example, if you want to use the static pthreads library
with Mingw, you 
have to define PTW32_STATIC_LIB, or you will get undefined
symbol errors, 
because the function names are decorated incorrectly. I have
also had to 
modify pkg-config scripts to make them return the necessary
values when 
MPlayer's configure calls them.

2) If a library has a runtime package and a development
package, you should 
install both.


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