Re: [PATCH] hw/core: Only build guest-loader if libfdt is available

[Alistair Francis <alistair23@gmail.com>]

On Mon, Mar 15, 2021 at 1:15 PM Philippe Mathieu-Daudé
<philmd@redhat.com> wrote:
>
> Add a Kconfig entry for guest-loader so we can optionally deselect
> it (default is built in), and add a Meson dependency on libfdt.
>
> This fixes when building with --disable-fdt:
>
>   /usr/bin/ld: libcommon.fa.p/hw_core_guest-loader.c.o: in function `loader_insert_platform_data':
>   hw/core/guest-loader.c:56: undefined reference to `qemu_fdt_add_subnode'
>   /usr/bin/ld: hw/core/guest-loader.c:57: undefined reference to `qemu_fdt_setprop'
>   /usr/bin/ld: hw/core/guest-loader.c:61: undefined reference to `qemu_fdt_setprop_string_array'
>   /usr/bin/ld: hw/core/guest-loader.c:68: undefined reference to `qemu_fdt_setprop_string'
>   /usr/bin/ld: hw/core/guest-loader.c:74: undefined reference to `qemu_fdt_setprop_string_array'
>   collect2: error: ld returned 1 exit status
>
> Fixes: a33ff6d2c6b ("hw/core: implement a guest-loader to support static hypervisor guests")
> Reported-by: Christian Borntraeger <borntraeger@de.ibm.com>
> Tested-by: Christian Borntraeger <borntraeger@de.ibm.com>
> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>

Alistair

> ---
>  hw/core/Kconfig     | 5 +++++
>  hw/core/meson.build | 3 +--
>  2 files changed, 6 insertions(+), 2 deletions(-)
>
> diff --git a/hw/core/Kconfig b/hw/core/Kconfig
> index fdf03514d7d..9397503656d 100644
> --- a/hw/core/Kconfig
> +++ b/hw/core/Kconfig
> @@ -11,6 +11,11 @@ config GENERIC_LOADER
>      bool
>      default y
>
> +config GUEST_LOADER
> +    bool
> +    default y
> +    depends on TCG
> +
>  config OR_IRQ
>      bool
>
> diff --git a/hw/core/meson.build b/hw/core/meson.build
> index 9cd72edf513..59f1605bb07 100644
> --- a/hw/core/meson.build
> +++ b/hw/core/meson.build
> @@ -16,6 +16,7 @@
>  common_ss.add(files('cpu.c'))
>  common_ss.add(when: 'CONFIG_FITLOADER', if_true: files('loader-fit.c'))
>  common_ss.add(when: 'CONFIG_GENERIC_LOADER', if_true: files('generic-loader.c'))
> +common_ss.add(when: ['CONFIG_GUEST_LOADER', fdt], if_true: files('guest-loader.c'))
>  common_ss.add(when: 'CONFIG_OR_IRQ', if_true: files('or-irq.c'))
>  common_ss.add(when: 'CONFIG_PLATFORM_BUS', if_true: files('platform-bus.c'))
>  common_ss.add(when: 'CONFIG_PTIMER', if_true: files('ptimer.c'))
> @@ -37,8 +38,6 @@
>    'clock-vmstate.c',
>  ))
>
> -softmmu_ss.add(when: 'CONFIG_TCG', if_true: files('guest-loader.c'))
> -
>  specific_ss.add(when: 'CONFIG_SOFTMMU', if_true: files(
>    'machine-qmp-cmds.c',
>    'numa.c',
> --
> 2.26.2
>
>