[mythtv] Windows frontend issues

[Janne Grunau]

On Sat, Aug 28, 2010 at 01:12:09PM -0700, Jeff Lu wrote:
> > It is probably related to the  ffmpeg sync, I've seen it too. 
> 
> Here's what I have so far:
> 
> It seems that Windows is getting confused by near-identical function names in 
> libavcodec and libavformat - e.g., av_init_packet() and 
> av_init_packet at LIBAVFORMAT_52(), respectively.  The @ part apparently is ignored 
> 
> at runtime, so the stub functions in libavformat end up calling themselves, ad 
> infinitum.
> 
> Quick/dirty hack that gets things mostly working:
> 
> --- configure   (revision 25902)
> +++ configure   (working copy)
> @@ -3849,7 +3849,7 @@
> check_ldflags -Wl,-Bsymbolic
> 
> echo "X{};" > $TMPV
> -if test_ldflags -Wl,--version-script,$TMPV; then
> +disabled windows && if test_ldflags -Wl,--version-script,$TMPV; then
>      append SHFLAGS '-Wl,--version-script,\$(SUBDIR)lib\$(NAME).ver'
>      check_cc <<EOF && enable symver_asm_label
> void ff_foo(void) __asm__ ("av_foo at VERSION");
> 
> Maybe a better way to do this?

just disabling symver for mingw32 like I just did

> I'm guessing there might be a linker switch or 
> something to get the full function names respected at runtime.  Either way, it 
> seems safe enough to disable symver because we aren't concerned about binary 
> compatibility across different versions of our libs.

no, we don't care.

Janne