[PATCH v3 0/2] modules: Improve modinfo.c support

[Jose R. Ziviani]

This patchset introduces the modinfo_kconfig aiming for a fine-tune
control of module loading by simply checking Kconfig options during the
compile time, then generates one modinfo-<target>-softmmu.c per target.

The main reason of this change is to fix problems like:
$ ./qemu-system-s390x -nodefaults -display none -accel tcg -M none -device help 
| head
Failed to open module: /.../hw-display-qxl.so: undefined symbol: vga_ioport_read
Failed to open module: /.../hw-display-virtio-vga.so: undefined symbol: 
vmstate_vga_common
Failed to open module: /.../hw-display-virtio-vga.so: undefined symbol: 
vmstate_vga_common
Failed to open module: /.../hw-display-virtio-vga-gl.so: undefined symbol: 
have_vga
Failed to open module: /.../hw-usb-smartcard.so: undefined symbol: 
ccid_card_ccid_attach
Failed to open module: /.../hw-usb-redirect.so: undefined symbol: 
vmstate_usb_device
Failed to open module: /.../hw-usb-host.so: undefined symbol: vmstate_usb_device

With this patch, I run this small script successfuly:
    #!/bin/bash
    pushd ~/suse/virtualization/qemu/build
    for qemu in qemu-system-*
    do
        [[ -f "$qemu" ]] || continue
        res=$(./$qemu -nodefaults -display none -accel tcg -M none -device help 
2>&1 | grep "Failed to" > /dev/null; echo $?)
        [[ $res -eq 0 ]] && echo "Error: $qemu"
    done
    popd

Also run 'make check' and 'check-acceptance' without any failures.

v2 -> v3:
 - Renamed module_needs to module_kconfig [Gerd]
 - Reworded the commit message a bit to improve a better understanding [myself]

v1 -> v2:
 - Changed the approach to this problem after suggestions made by Paolo and 
Gerd.

Thank you!

Jose R. Ziviani (2):
  modules: introduces module_kconfig directive
  modules: generates per-target modinfo

 hw/display/qxl.c                |  1 +
 hw/display/vhost-user-gpu-pci.c |  1 +
 hw/display/vhost-user-gpu.c     |  1 +
 hw/display/vhost-user-vga.c     |  1 +
 hw/display/virtio-gpu-base.c    |  1 +
 hw/display/virtio-gpu-gl.c      |  1 +
 hw/display/virtio-gpu-pci-gl.c  |  1 +
 hw/display/virtio-gpu-pci.c     |  1 +
 hw/display/virtio-gpu.c         |  1 +
 hw/display/virtio-vga-gl.c      |  1 +
 hw/display/virtio-vga.c         |  1 +
 hw/s390x/virtio-ccw-gpu.c       |  1 +
 hw/usb/ccid-card-emulated.c     |  1 +
 hw/usb/ccid-card-passthru.c     |  1 +
 hw/usb/host-libusb.c            |  1 +
 hw/usb/redirect.c               |  1 +
 include/qemu/module.h           | 10 ++++++++
 meson.build                     | 25 +++++++++++++-------
 scripts/modinfo-generate.py     | 42 ++++++++++++++++++++-------------
 19 files changed, 69 insertions(+), 24 deletions(-)

-- 
2.33.0