Error in groove_file_open_custom when making

[EwanRoycroft]

Trying to build on Raspberry Pi Zero W, having followed the instructions here, I receive this error when making libgroove:

Scanning dependencies of target libgroove_shared
[  2%] Building C object CMakeFiles/libgroove_shared.dir/src/buffer.c.o
[  5%] Building C object CMakeFiles/libgroove_shared.dir/src/file.c.o
/home/pi/libgroove/src/file.c: In function ‘groove_file_open_custom’:
/home/pi/libgroove/src/file.c:126:12: error: ‘AVIOContext {aka struct AVIOContext}’ has no member named ‘direct’
     f->avio->direct = AVIO_FLAG_DIRECT;
            ^~
/home/pi/libgroove/src/file.c:126:23: error: ‘AVIO_FLAG_DIRECT’ undeclared (first use in this function)
     f->avio->direct = AVIO_FLAG_DIRECT;
                       ^~~~~~~~~~~~~~~~
/home/pi/libgroove/src/file.c:126:23: note: each undeclared identifier is reported only once for each function it appears in
/home/pi/libgroove/src/file.c:184:33: error: implicit declaration of function ‘av_get_default_channel_layout’ [-Werror=implicit-function-declaration]
         avctx->channel_layout = av_get_default_channel_layout(avctx->channels);
                                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
CMakeFiles/libgroove_shared.dir/build.make:86: recipe for target 'CMakeFiles/libgroove_shared.dir/src/file.c.o' failed
make[2]: *** [CMakeFiles/libgroove_shared.dir/src/file.c.o] Error 1
CMakeFiles/Makefile2:289: recipe for target 'CMakeFiles/libgroove_shared.dir/all' failed
make[1]: *** [CMakeFiles/libgroove_shared.dir/all] Error 2
Makefile:127: recipe for target 'all' failed
make: *** [all] Error 2

Any idea what's gone wrong here?

[mattnite]

Hey @EwanRoycroft I've got the exact same issue. I'm trying to build from source on a fresh Ubuntu 18.04 (also followed previous steps for libav) not sure how to fix it, but I'll post here if I find anything.