Created attachment 894770 [details] build.log.gz Trying to build vlc on a clang arm64 system fails with ld.lld: error: undefined symbol: __aarch64_ldadd4_acq_rel >>> referenced by dialogs_provider.cpp >>> gui/qt/.libs/libqt_plugin_la-dialogs_provider.o:(DialogsProvider::getOpenURL(QWidget*, QString const&, QUrl const&, QString const&, QString*)) >>> referenced by dialogs_provider.cpp >>> gui/qt/.libs/libqt_plugin_la-dialogs_provider.o:(DialogsProvider::getOpenURL(QWidget*, QString const&, QUrl const&, QString const&, QString*)) >>> referenced by dialogs_provider.cpp >>> gui/qt/.libs/libqt_plugin_la-dialogs_provider.o:(DialogsProvider::getOpenURL(QWidget*, QString const&, QUrl const&, QString const&, QString*)) >>> referenced 5498 more times clang++: error: linker command failed with exit code 1 (use -v to see invocation) As far as I can tell, this error happens during linking of a shared library and for whatever reason libtool sticks a -nostdlib flag in there, which causes clang to not link against libclang_rt where the symbol is located. This issue seems to be somewhat known as there's this commit that adds a patch in vlc https://code.videolan.org/videolan/vlc/-/commit/5c7092dfe6ee45f38c9ff7063678956ace155815. The commit message has a good description of the underlying issue. Applying libtool-2.4.6-clang-libs.patch (or rather its updated version https://code.videolan.org/videolan/vlc/-/blob/3.0.20/extras/tools/libtool-2.4.6-clang-libs.patch) to vlc does not help. It seems that it gets overridden. Applying it to gentoo's dev-build/libtool does help, however.
Created attachment 894771 [details] emerge --info
