1 files changed, 43 insertions, 0 deletions
diff --git a/results/classifier/accel-gemma3:12b/kvm/516 b/results/classifier/accel-gemma3:12b/kvm/516
new file mode 100644
index 00000000..4c707b5a
--- /dev/null
+++ b/results/classifier/accel-gemma3:12b/kvm/516
@@ -0,0 +1,43 @@
+
+Configure option `--enable-plugins` makes modules in shared library not loadable on macOS
+Description of problem:
+The title mentions `--enable-plugins` option, however as it's enabled by default, not providing `--disable-plugins` would also cause this to happen.
+
+If TCG plugin support is enabled, symbols in `qemu-system-*` binaries will be missing, and module libraries would fail to load as they expect those symbols to exist in the main binary.
+
+Configure options used: `STRIP="strip -x" ./configure --enable-user --enable-tools --enable-parallels --enable-libxml2 --enable-spice --enable-hvf --enable-cocoa --enable-guest-agent --enable-curses --enable-plugins --enable-modules --objcc=gcc --enable-libusb --enable-usb-redir`
+
+After inspecting the compiler command line, I've found the linker option `-Wl,-exported_symbols_list,qemu-plugins-ld64.symbols` is causing this to happen: only symbols listed in `qemu-plugins-ld64.symbols` would be kept in `qemu-system-*` binaries and all other symbols will be hidden.
+
+Note that this is not caused by stripping (although I had to use custom strip command line on macOS to successfully compile qemu); the option `-exported_symbols_list` works by only exposing the provided symbols and treating all other symbols as `visibility=hidden`.
+
+Replacing `--enable-plugins` to `--disable-plugins` in the above configure command line would "fix" it, although it means TCG plugins will not be supported.
+Steps to reproduce:
+1. Build QEMU on macOS with plugin support enabled
+2. Try to use modules in shared library like qxl
+Additional information:
+Some examples:
+
+```
+$ qemu-system-x86_64 -device qxl
+Failed to open module: dlopen(/usr/local/bin/../lib/qemu/ui-spice-core.dylib, 10): Symbol not found: __TRACE_QEMU_SPICE_ADD_MEMSLOT_DSTATE
+  Referenced from: /usr/local/bin/../lib/qemu/ui-spice-core.dylib
+  Expected in: flat namespace
+ in /usr/local/bin/../lib/qemu/ui-spice-core.dylib
+Failed to open module: dlopen(/usr/local/bin/../lib/qemu/hw-display-qxl.dylib, 2): Symbol not found: __TRACE_QXL_CLIENT_MONITORS_CONFIG_CAPPED_DSTATE
+  Referenced from: /usr/local/bin/../lib/qemu/hw-display-qxl.dylib
+  Expected in: flat namespace
+ in /usr/local/bin/../lib/qemu/hw-display-qxl.dylib
+qemu-system-x86_64: -device qxl: 'qxl' is not a valid device model name
+```
+
+```
+$ qemu-system-x86_64 -spice port=5901
+Failed to open module: dlopen(/usr/local/bin/../lib/qemu/ui-spice-core.dylib, 10): Symbol not found: __TRACE_QEMU_SPICE_ADD_MEMSLOT_DSTATE
+  Referenced from: /usr/local/bin/../lib/qemu/ui-spice-core.dylib
+  Expected in: flat namespace
+ in /usr/local/bin/../lib/qemu/ui-spice-core.dylib
+qemu-system-x86_64: -spice port=5901: spice support is disabled
+```
+
+After disabling plugin support I could run virtual machines locally through libvirt with full spice and qxl video support.