[Slackbuilds-users] vlc and gcc 9.2 (current)

[Peter Dambier]

Sorry I could not reach the maintainer.

I do need vls and most likely not only me.

There is a bag of fun hidden when moving on and that bag of fun is gcc.

My native language is C, the old style and I never got C++ right or C++
always got me. Wrong company, wrong teacher. In the Beginning was the
class lib and it was no glass lib. Every company had its own they always
wrote it before understanding C++ in the first place.

gcc (GCC) 9.2 has got the Mad Cow Disease. E.g. it dos not understand

    abs(p_in->format.i_height);

May be it knows plain old C? Does it understand

    abs((int)p_in->format.i_height);

Hurray it does.

This little change applied twice in one line was all it took to make vlc
build on Slackware current.

Dont mention those 64 required packages with some 16 of them having
similar hickups.

If there is no maintainer for vlc I'll grab it but I have to learn how
to write and apply a patch for the slackbuild first.

Here is my patch for

vlc/vlc-3.0.8/modules/video_filte/opencv_wrapper.c

I got it working on 32 bit Slackware current.
That patch should not harm Slackware 14.2

Cheers
Peter


*** opencv_wrapper.c    2020-02-11 21:24:32.997759854 +0100
--- opencv_wrapper.c.orig       2017-12-05 11:48:00.000000000 +0100
***************
*** 313,323 ****

*****************************************************************************/
    static void VlcPictureToIplImage( filter_t* p_filter, picture_t* p_in )
    {
        int planes = p_in->i_planes;    //num input video planes
        // input video size
!     CvSize sz = cvSize(abs((int)p_in->format.i_width),
abs((int)p_in->format.i_height));
        video_format_t fmt_out;
        filter_sys_t* p_sys = p_filter->p_sys;

        memset( &fmt_out, 0, sizeof(video_format_t) );

--- 313,323 ----

*****************************************************************************/
    static void VlcPictureToIplImage( filter_t* p_filter, picture_t* p_in )
    {
        int planes = p_in->i_planes;    //num input video planes
        // input video size
!     CvSize sz = cvSize(abs(p_in->format.i_width),
abs(p_in->format.i_height));
        video_format_t fmt_out;
        filter_sys_t* p_sys = p_filter->p_sys;

        memset( &fmt_out, 0, sizeof(video_format_t) );


--
Peter and Karin Dambier
Adalbert-Stifter-Strasse 17
D-69509 Moerlenbach
+49(6209)280-3030 (VoIP: GGEW)
+49(6252)750-308 (VoIP: sipgate.de)
mail: peter at peter-dambier.de