I had this bug when compiling on qemu riscv64 with gcc-11.1.0-r2 It is a bug happends on arch without 1 or 2-bit atomic operations e.g. riscv and therefore requires to link against libatomic. There is also reports for Raspberry Pi, please refer to this mailing list thread. https://mailman.videolan.org/pipermail/vlc-devel/2020-January/130770.html Reproducible: Always
Created attachment 725959 [details] build log
Created attachment 725962 [details] emerge --info
/usr/lib/gcc/riscv64-unknown-linux-gnu/11.1.0/../../../../riscv64-unknown-linux-gnu/bin/ld: modules/.libs/bank.o: in function `module_InitBank': /var/tmp/portage/media-video/vlc-3.0.16-r6/work/vlc-3.0.16/src/modules/bank.c:582: undefined reference to `__atomic_exchange_1' /usr/lib/gcc/riscv64-unknown-linux-gnu/11.1.0/../../../../riscv64-unknown-linux-gnu/bin/ld: audio_output/.libs/dec.o: in function `aout_DecDelete': /var/tmp/portage/media-video/vlc-3.0.16-r6/work/vlc-3.0.16/src/audio_output/dec.c:134: undefined reference to `__atomic_fetch_or_1' /usr/lib/gcc/riscv64-unknown-linux-gnu/11.1.0/../../../../riscv64-unknown-linux-gnu/bin/ld: audio_output/.libs/dec.o: in function `aout_RequestRestart': /var/tmp/portage/media-video/vlc-3.0.16-r6/work/vlc-3.0.16/src/audio_output/dec.c:201: undefined reference to `__atomic_exchange_1' /usr/lib/gcc/riscv64-unknown-linux-gnu/11.1.0/../../../../riscv64-unknown-linux-gnu/bin/ld: audio_output/.libs/dec.o: in function `aout_DecPlay': /var/tmp/portage/media-video/vlc-3.0.16-r6/work/vlc-3.0.16/src/audio_output/dec.c:368: undefined reference to `__atomic_exchange_1' /usr/lib/gcc/riscv64-unknown-linux-gnu/11.1.0/../../../../riscv64-unknown-linux-gnu/bin/ld: misc/.libs/picture_pool.o: in function `picture_pool_ReleasePicture': /var/tmp/portage/media-video/vlc-3.0.16-r6/work/vlc-3.0.16/src/misc/picture_pool.c:88: undefined reference to `__atomic_fetch_sub_2' /usr/lib/gcc/riscv64-unknown-linux-gnu/11.1.0/../../../../riscv64-unknown-linux-gnu/bin/ld: misc/.libs/picture_pool.o: in function `picture_pool_Release': /var/tmp/portage/media-video/vlc-3.0.16-r6/work/vlc-3.0.16/src/misc/picture_pool.c:65: undefined reference to `__atomic_fetch_sub_2' /usr/lib/gcc/riscv64-unknown-linux-gnu/11.1.0/../../../../riscv64-unknown-linux-gnu/bin/ld: misc/.libs/picture_pool.o: in function `picture_pool_Release': /var/tmp/portage/media-video/vlc-3.0.16-r6/work/vlc-3.0.16/src/misc/picture_pool.c:65: undefined reference to `__atomic_fetch_sub_2' /usr/lib/gcc/riscv64-unknown-linux-gnu/11.1.0/../../../../riscv64-unknown-linux-gnu/bin/ld: misc/.libs/picture_pool.o: in function `picture_pool_Get': /var/tmp/portage/media-video/vlc-3.0.16-r6/work/vlc-3.0.16/src/misc/picture_pool.c:213: undefined reference to `__atomic_fetch_add_2' /usr/lib/gcc/riscv64-unknown-linux-gnu/11.1.0/../../../../riscv64-unknown-linux-gnu/bin/ld: misc/.libs/picture_pool.o: in function `picture_pool_Reserve': /var/tmp/portage/media-video/vlc-3.0.16-r6/work/vlc-3.0.16/src/misc/picture_pool.c:192: undefined reference to `__atomic_fetch_add_2' collect2: error: ld returned 1 exit status distcc[518209] ERROR: compile (null) on localhost failed make[3]: *** [Makefile:2359: libvlccore.la] Error 1 make[3]: Leaving directory '/var/tmp/portage/media-video/vlc-3.0.16-r6/work/vlc-3.0.16/src' make[2]: *** [Makefile:1903: all] Error 2 make[2]: Leaving directory '/var/tmp/portage/media-video/vlc-3.0.16-r6/work/vlc-3.0.16/src' make[1]: *** [Makefile:1563: all-recursive] Error 1 make[1]: Leaving directory '/var/tmp/portage/media-video/vlc-3.0.16-r6/work/vlc-3.0.16' make: *** [Makefile:1450: all] Error 2 * ERROR: media-video/vlc-3.0.16-r6::gentoo failed (compile phase): * emake failed * * If you need support, post the output of `emerge --info '=media-video/vlc-3.0.16-r6::gentoo'`,
This got addressed by commit e924fc0b2dd85d16a5a537affe4be23cf213e0e5.
