[DVDnav-discuss] assertion failure with certain DVD's

[Rafaël Carré]

Le Wed, 30 Nov 2011 20:54:25 -0700,
Roger Pack <rogerdpack2 at gmail.com> a écrit :

> >
> > Does it report this error message for both mplayer and VLC (does VLC still
> > loop)?
> 
> I'm unable to tell if VLC is fixed by it or not.  My "guess" is that
> it would be fixed, however, since it fixed mplayer which seemed to be
> doing about the same behavior if I commented out the assertion line
> that failed.
> 
> As a note, when I try to compile libdvdread (as a precursor to
> compiling libdvdnav), to then use it to compile VLC, I run into some
> snags in building under msys...
> 
> $./configure2
> ./configure2: line 95: cd: /usr/local/: No such file or directory #
> needs to be run in bash I believe

Nope, you need to set the install prefix with --prefix=blabla

> Checking if we're big-endian... ./configure2: line 113: mktemp:
> command not found # this one might be my fault
> 
> Done, type 'make install' to build and install
> bash-3.1$ make
> sh "/c/dev/ruby/downloads/libdvdread"/version.sh
> "/c/dev/ruby/downloads/libdvdread" "4.2.0"
> cd obj && gcc -fPIC -DPIC -MD -O3  -g -Wall -funsigned-char
> -I/c/dev/ruby/downloads/libdvdread
> -I"/c/dev/ruby/downloads/libdvdread"/src -D_FILE_OFFSET_BITS=64
> -D_LARGEFILE64_SOURCE -DHAVE_CONFIG_H -DHAVE_DLFCN_H
> -I"/c/dev/ruby/downloads/libdvdread"/src -c -o dvd_input.so
> /c/dev/ruby/downloads/libdvdread/src/dvd_input.c
> c:/dev/ruby/downloads/libdvdread/src/dvd_input.c:1:0: warning: -fPIC
> ignored for target (all code is position independent)
> c:/dev/ruby/downloads/libdvdread/src/dvd_input.c:53:19: fatal error:
> dlfcn.h: No such file or directory
> compilation terminated.
> 
> (appears to set HAVE_DLFCN_H in error)

Without using autotools, dlfcn.h presence is not detected

./msvc/config.h:#define HAVE_DLFCN_H 1

And it is assumed to exist (is this file made for Visual Studio?)

> then HAVE_DLFCNH undefined manually, it then gives the following:
> cd obj && gcc -fPIC -DPIC -MD -O3  -g -Wall -funsigned-char
> -I/c/dev/ruby/downloads/libdvdread
> -I"/c/dev/ruby/downloads/libdvdread"/src -D_FILE_OFFSET_BITS=64
> -D_LARGEFILE64_SOURCE -DHAVE_CONFIG_H -DHAVE_DLFCN_H
> -I"/c/dev/ruby/downloads/libdvdread"/src -c -o dvd_input.so
> /c/dev/ruby/downloads/libdvdread/src/dvd_input.c
> c:/dev/ruby/downloads/libdvdread/src/dvd_input.c:1:0: warning: -fPIC
> ignored for target (all code is position independent)
> c:/dev/ruby/downloads/libdvdread/src/dvd_input.c:56:38: fatal error:
> ../../msvc/contrib/dlfcn.c: No such file or directory
> 
> Fixing the path, and tweaking some include paths, and it compiles.
> 
> Then, at link time:
> 
> /usr/lib/gcc/i586-mingw32msvc/4.4.4/../../../../i586-mingw32msvc/bin/ld:
> cannot find -ldl
> 
> so I remove the link to -ldl (which I don't think is needed for
> mingw), then it links.
> 
> Then $ make install'ing it subsequently fails
> $ make install
> install -d /lib
> ./install: line 1: syntax error near unexpected token `C'
> ./install: line 1: `Copyright (C) 1994, 1995, 1996, 1999, 2000, 2001, 2002 Free
> Software'
> make: *** [install-shared] Error 2
> 
> (I think this is because there is a file named "INSTALL" and it's
> trying to execute that in windows.
> 
> So anyway here is how I compiled it, if it helps anybody:
> https://gist.github.com/1413008
> 
> Turned out now tot help me much, as, when I cross compiled it, I think
> some of the #define's are maybe off as dvd:/// in VLC don't seem to
> work :)
> 
> Also as a note when it runs strip and ranlib, if it's being cross
> compiled, it would be helpful to call their equivalent:
> $ ./configure2 --cc=i586-mingw32msvc-gcc
> should eventually call i586-mingw32msvc-ranlib
> 
> maybe it could use a new configure option for a prefix or what not.

./configure --host=i586-mingw32-msvc should work

> I'd be happy to come up with a patch for it.
> 
> Thanks.
> -roger-
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-- 
Rafaël Carré