amdgpu_drv.so: undefined symbol: glamor_egl_init_textured_pixmap
I had built xserver and amdgpu from master via AUR and see this in Xorg.0.log:
Failed to load /usr/lib/xorg/modules/drivers/amdgpu_drv.so: /usr/lib/xorg/modules/drivers/amdgpu_drv.so: undefined symbol: glamor_egl_init_textured_pixmap