[Mesa-dev] -fno-common build failures (default from upcoming gcc release 10)

[Bas Nieuwenhuizen]

I think this ended up spawning a bunch of work in
https://gitlab.freedesktop.org/mesa/mesa/issues/2385

On Mon, Jan 20, 2020 at 3:41 PM Stefan Dirsch <sndirsch at suse.de> wrote:
>
> Hi
>
> Starting from the upcoming GCC release 10, the default of -fcommon option will
> change to -fno-common. Due to this we're going to see a lot of build failures
> in Mesa drivers like
>
> multiple definition of `syncobj_handle'; src/amd/vulkan/9198681@@vulkan_radeon at sha/meson-generated_.._radv_entrypoints.c.o (symbol from plugin):(.text+0x0): first defined here
> [  213s]
> /usr/lib64/gcc/x86_64-suse-linux/9/../../../../x86_64-suse-linux/bin/ld:
> src/amd/vulkan/9198681@@vulkan_radeon at sha/radv_wsi_wayland.c.o (symbol from
> plugin): in function `radv_GetPhysicalDeviceWaylandPresentationSupportKHR':
>
> I'm wondering if there is already anybody working on fixing these issues or is
> it recommended to workaround it by setting -fcommon manually somehow? How can
> the latter be done when using meson/ninja as build tool?
>
> Thanks,
> Stefan
>
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