Can't recompile the xillinux-diligent

man git-apply describes how to apply patches into a git repository (which is what you already have after downloading the kernel from github).

The patches are at /usr/src/xillinux/kernel-patches

This will also set the .config file correctly for a "thin" kernel. So the kernel is ready for compilation immediately after applying the patches.

Actually, the error I got is listed,

......
  LD      vmlinux.o
  MODPOST vmlinux.o
WARNING: modpost: Found 11 section mismatch(es).
To see full details build your kernel with:
'make CONFIG_DEBUG_SECTION_MISMATCH=y'
  GEN     .version
  CHK     include/generated/compile.h
  UPD     include/generated/compile.h
  CC      init/version.o
  LD      init/built-in.o
  LD      .tmp_vmlinux1
drivers/built-in.o: In function `analog_drm_encoder_dpms':
clk-divider.c:(.text+0x2cd68): undefined reference to `drm_detect_hdmi_monitor'
drivers/built-in.o: In function `analog_drm_encoder_destroy':
clk-divider.c:(.text+0x2ce6c): undefined reference to `drm_encoder_cleanup'
drivers/built-in.o: In function `analog_drm_connector_destroy':
clk-divider.c:(.text+0x2ce94): undefined reference to `drm_sysfs_connector_remove'
clk-divider.c:(.text+0x2cea0): undefined reference to `drm_connector_cleanup'
drivers/built-in.o: In function `analog_drm_connector_detect':
clk-divider.c:(.text+0x2cee8): undefined reference to `drm_get_edid'
drivers/built-in.o: In function `analog_drm_connector_get_modes':
clk-divider.c:(.text+0x2cf5c): undefined reference to `drm_get_edid'
clk-divider.c:(.text+0x2cf6c): undefined reference to `drm_mode_connector_update_edid_property'
clk-divider.c:(.text+0x2cf7c): undefined reference to `drm_add_edid_modes'
drivers/built-in.o: In function `analog_drm_encoder_create':
clk-divider.c:(.text+0x2cffc): undefined reference to `drm_err'
clk-divider.c:(.text+0x2d024): undefined reference to `drm_encoder_init'
clk-divider.c:(.text+0x2d03c): undefined reference to `drm_i2c_encoder_init'
clk-divider.c:(.text+0x2d05c): undefined reference to `drm_connector_init'
clk-divider.c:(.text+0x2d068): undefined reference to `drm_sysfs_connector_add'
clk-divider.c:(.text+0x2d080): undefined reference to `drm_mode_connector_attach_encoder'
clk-divider.c:(.text+0x2d094): undefined reference to `drm_err'
clk-divider.c:(.text+0x2d09c): undefined reference to `drm_sysfs_connector_remove'
clk-divider.c:(.text+0x2d0a4): undefined reference to `drm_connector_cleanup'
drivers/built-in.o: In function `analog_drm_crtc_destroy':
clk-divider.c:(.text+0x2d2e0): undefined reference to `drm_crtc_cleanup'
drivers/built-in.o: In function `analog_drm_crtc_create':
clk-divider.c:(.text+0x2d31c): undefined reference to `drm_err'
clk-divider.c:(.text+0x2d358): undefined reference to `drm_crtc_init'
drivers/built-in.o: In function `analog_drm_platform_remove':
clk-divider.c:(.text+0x2d38c): undefined reference to `drm_platform_exit'
drivers/built-in.o: In function `analog_drm_unload':
clk-divider.c:(.text+0x2d3ac): undefined reference to `drm_kms_helper_poll_fini'
clk-divider.c:(.text+0x2d3b4): undefined reference to `drm_mode_config_cleanup'
drivers/built-in.o: In function `analog_drm_load':
clk-divider.c:(.text+0x2d438): undefined reference to `drm_mode_config_init'
clk-divider.c:(.text+0x2d440): undefined reference to `drm_kms_helper_poll_init'
clk-divider.c:(.text+0x2d4bc): undefined reference to `drm_err'
clk-divider.c:(.text+0x2d4c4): undefined reference to `drm_mode_config_cleanup'
drivers/built-in.o: In function `drm_register_work':
clk-divider.c:(.text+0x2d53c): undefined reference to `drm_platform_init'
drivers/built-in.o: In function `analog_drm_gem_alloc':
clk-divider.c:(.text+0x2d64c): undefined reference to `drm_err'
clk-divider.c:(.text+0x2d66c): undefined reference to `drm_gem_object_init'
clk-divider.c:(.text+0x2d680): undefined reference to `drm_err'
drivers/built-in.o: In function `analog_drm_gem_free_object':
clk-divider.c:(.text+0x2d6dc): undefined reference to `drm_ut_debug_printk'
clk-divider.c:(.text+0x2d6f8): undefined reference to `drm_ut_debug_printk'
clk-divider.c:(.text+0x2d70c): undefined reference to `drm_gem_free_mmap_offset'
clk-divider.c:(.text+0x2d714): undefined reference to `drm_gem_object_release'
drivers/built-in.o: In function `analog_drm_gem_dumb_create':
clk-divider.c:(.text+0x2d7a8): undefined reference to `drm_gem_handle_create'
clk-divider.c:(.text+0x2d7b8): undefined reference to `drm_gem_object_release'
clk-divider.c:(.text+0x2d804): undefined reference to `drm_gem_object_free'
drivers/built-in.o: In function `analog_drm_gem_dumb_map_offset':
clk-divider.c:(.text+0x2d84c): undefined reference to `drm_ut_debug_printk'
clk-divider.c:(.text+0x2d864): undefined reference to `drm_gem_object_lookup'
clk-divider.c:(.text+0x2d880): undefined reference to `drm_err'
clk-divider.c:(.text+0x2d89c): undefined reference to `drm_gem_create_mmap_offset'
clk-divider.c:(.text+0x2d8c0): undefined reference to `drm_ut_debug_printk'
clk-divider.c:(.text+0x2d8e4): undefined reference to `drm_ut_debug_printk'
clk-divider.c:(.text+0x2d910): undefined reference to `drm_gem_object_free'
drivers/built-in.o: In function `analog_drm_gem_dumb_destroy':
clk-divider.c:(.text+0x2da2c): undefined reference to `drm_gem_handle_delete'
drivers/built-in.o: In function `analog_drm_gem_mmap':
clk-divider.c:(.text+0x2da54): undefined reference to `drm_ut_debug_printk'
clk-divider.c:(.text+0x2da60): undefined reference to `drm_gem_mmap'
clk-divider.c:(.text+0x2da74): undefined reference to `drm_err'
drivers/built-in.o: In function `analog_drm_fb_create_handle':
clk-divider.c:(.text+0x2dab4): undefined reference to `drm_gem_handle_create'
drivers/built-in.o: In function `analog_drm_fb_destroy':
clk-divider.c:(.text+0x2db04): undefined reference to `drm_gem_object_free'
clk-divider.c:(.text+0x2db14): undefined reference to `drm_framebuffer_cleanup'
drivers/built-in.o: In function `analog_drm_fb_alloc':
clk-divider.c:(.text+0x2db60): undefined reference to `drm_framebuffer_init'
clk-divider.c:(.text+0x2db78): undefined reference to `drm_err'
clk-divider.c:(.text+0x2db88): undefined reference to `drm_helper_mode_fill_fb_struct'
drivers/built-in.o: In function `analog_drm_fbdev_probe':
clk-divider.c:(.text+0x2dbec): undefined reference to `drm_ut_debug_printk'
clk-divider.c:(.text+0x2dc18): undefined reference to `drm_ut_debug_printk'
clk-divider.c:(.text+0x2dc40): undefined reference to `drm_mode_legacy_fb_format'
clk-divider.c:(.text+0x2dc84): undefined reference to `drm_err'
clk-divider.c:(.text+0x2dcb4): undefined reference to `drm_err'
clk-divider.c:(.text+0x2dcf8): undefined reference to `drm_err'
clk-divider.c:(.text+0x2dd0c): undefined reference to `drm_fb_helper_fill_fix'
clk-divider.c:(.text+0x2dd20): undefined reference to `drm_fb_helper_fill_var'
clk-divider.c:(.text+0x2dd7c): undefined reference to `drm_err'
drivers/built-in.o: In function `analog_drm_output_poll_changed':
clk-divider.c:(.text+0x2ddf8): undefined reference to `drm_fb_helper_hotplug_event'
drivers/built-in.o: In function `analog_drm_fb_create':
clk-divider.c:(.text+0x2de0c): undefined reference to `drm_gem_object_lookup'
clk-divider.c:(.text+0x2de20): undefined reference to `drm_err'
drivers/built-in.o: In function `analog_drm_fbdev_init':
clk-divider.c:(.text+0x2de98): undefined reference to `drm_ut_debug_printk'
clk-divider.c:(.text+0x2dec0): undefined reference to `drm_err'
clk-divider.c:(.text+0x2dee4): undefined reference to `drm_fb_helper_init'
clk-divider.c:(.text+0x2def8): undefined reference to `drm_err'
clk-divider.c:(.text+0x2df04): undefined reference to `drm_fb_helper_single_add_all_connectors'
clk-divider.c:(.text+0x2df18): undefined reference to `drm_err'
clk-divider.c:(.text+0x2df20): undefined reference to `drm_fb_helper_fini'
clk-divider.c:(.text+0x2df30): undefined reference to `drm_fb_helper_initial_config'
drivers/built-in.o: In function `analog_drm_fbdev_fini':
clk-divider.c:(.text+0x2dfc8): undefined reference to `drm_ut_debug_printk'
clk-divider.c:(.text+0x2dfec): undefined reference to `drm_fb_helper_fini'
drivers/built-in.o: In function `analog_drm_fbdev_restore_mode':
clk-divider.c:(.text+0x2e020): undefined reference to `drm_fb_helper_restore_fbdev_mode'
drivers/built-in.o: In function `adv7511_get_modes':
clk-divider.c:(.text+0x2e0fc): undefined reference to `regmap_update_bits'
clk-divider.c:(.text+0x2e114): undefined reference to `drm_do_get_edid'
clk-divider.c:(.text+0x2e138): undefined reference to `regmap_update_bits'
clk-divider.c:(.text+0x2e14c): undefined reference to `drm_mode_connector_update_edid_property'
clk-divider.c:(.text+0x2e158): undefined reference to `drm_add_edid_modes'
drivers/built-in.o: In function `adv7511_encoder_mode_set':
clk-divider.c:(.text+0x2e210): undefined reference to `regmap_write'
clk-divider.c:(.text+0x2e220): undefined reference to `regmap_write'
clk-divider.c:(.text+0x2e23c): undefined reference to `regmap_write'
clk-divider.c:(.text+0x2e254): undefined reference to `regmap_write'
clk-divider.c:(.text+0x2e268): undefined reference to `regmap_write'
drivers/built-in.o:clk-divider.c:(.text+0x2e278): more undefined references to `regmap_write' follow
drivers/built-in.o: In function `adv7511_encoder_mode_set':
clk-divider.c:(.text+0x2e2c0): undefined reference to `regmap_update_bits'
clk-divider.c:(.text+0x2e2d4): undefined reference to `regmap_update_bits'
drivers/built-in.o: In function `adv7511_set_config':
clk-divider.c:(.text+0x2e30c): undefined reference to `regmap_update_bits'
clk-divider.c:(.text+0x2e330): undefined reference to `regmap_update_bits'
clk-divider.c:(.text+0x2e344): undefined reference to `regmap_write'
clk-divider.c:(.text+0x2e364): undefined reference to `regmap_update_bits'
clk-divider.c:(.text+0x2e378): undefined reference to `regmap_update_bits'
clk-divider.c:(.text+0x2e3bc): undefined reference to `regmap_update_bits'
clk-divider.c:(.text+0x2e3e8): undefined reference to `regmap_write'
clk-divider.c:(.text+0x2e40c): undefined reference to `regmap_write'
clk-divider.c:(.text+0x2e434): undefined reference to `regmap_write'
clk-divider.c:(.text+0x2e44c): undefined reference to `regmap_update_bits'
clk-divider.c:(.text+0x2e464): undefined reference to `regmap_update_bits'
clk-divider.c:(.text+0x2e484): undefined reference to `regmap_write'
drivers/built-in.o: In function `adv7511_encoder_dpms':
clk-divider.c:(.text+0x2e4b4): undefined reference to `regmap_update_bits'
clk-divider.c:(.text+0x2e4c8): undefined reference to `regmap_update_bits'
clk-divider.c:(.text+0x2e4d0): undefined reference to `regcache_sync'
clk-divider.c:(.text+0x2e4e8): undefined reference to `regmap_update_bits'
clk-divider.c:(.text+0x2e4f0): undefined reference to `regcache_mark_dirty'
drivers/built-in.o: In function `adv7511_hpd':
clk-divider.c:(.text+0x2e53c): undefined reference to `regmap_read'
clk-divider.c:(.text+0x2e564): undefined reference to `regmap_write'
drivers/built-in.o: In function `adv7511_encoder_detect':
clk-divider.c:(.text+0x2e588): undefined reference to `regmap_read'
clk-divider.c:(.text+0x2e5c4): undefined reference to `regcache_mark_dirty'
clk-divider.c:(.text+0x2e5e8): undefined reference to `regmap_update_bits'
drivers/built-in.o: In function `adv7511_irq_handler':
clk-divider.c:(.text+0x2e618): undefined reference to `drm_helper_hpd_irq_event'
drivers/built-in.o: In function `adv7511_get_edid_block':
clk-divider.c:(.text+0x2e67c): undefined reference to `regmap_read'
clk-divider.c:(.text+0x2e698): undefined reference to `regmap_write'
clk-divider.c:(.text+0x2e7c0): undefined reference to `regmap_write'
drivers/built-in.o: In function `adv7511_packet_enable':
clk-divider.c:(.text+0x2e8e0): undefined reference to `regmap_update_bits'
clk-divider.c:(.text+0x2e8fc): undefined reference to `regmap_update_bits'
drivers/built-in.o: In function `adv7511_packet_disable':
clk-divider.c:(.text+0x2e92c): undefined reference to `regmap_update_bits'
clk-divider.c:(.text+0x2e948): undefined reference to `regmap_update_bits'
drivers/built-in.o: In function `adv7511_set_dai_fmt':
clk-divider.c:(.text+0x2ea08): undefined reference to `regmap_update_bits'
drivers/built-in.o:clk-divider.c:(.text+0x2ea1c): more undefined references to `regmap_update_bits' follow
drivers/built-in.o: In function `adv7511_hw_params':
clk-divider.c:(.text+0x2ebcc): undefined reference to `regmap_write'
clk-divider.c:(.text+0x2ebdc): undefined reference to `regmap_write'
clk-divider.c:(.text+0x2ebec): undefined reference to `regmap_write'
clk-divider.c:(.text+0x2ebfc): undefined reference to `regmap_write'
clk-divider.c:(.text+0x2ec0c): undefined reference to `regmap_write'
drivers/built-in.o:clk-divider.c:(.text+0x2ec1c): more undefined references to `regmap_write' follow
drivers/built-in.o: In function `adv7511_hw_params':
clk-divider.c:(.text+0x2ec30): undefined reference to `regmap_update_bits'
clk-divider.c:(.text+0x2ec44): undefined reference to `regmap_update_bits'
drivers/built-in.o: In function `adv7511_set_bias_level':
clk-divider.c:(.text+0x2ed24): undefined reference to `regmap_update_bits'
drivers/built-in.o: In function `adv7511_probe':
clk-divider.c:(.text+0x2ed98): undefined reference to `snd_soc_codec_set_cache_io'
drivers/built-in.o: In function `adv7511_audio_init':
clk-divider.c:(.text+0x2ede0): undefined reference to `snd_soc_register_codec'
drivers/built-in.o: In function `adv7511_audio_exit':
clk-divider.c:(.text+0x2ede8): undefined reference to `snd_soc_unregister_codec'
drivers/built-in.o: In function `adv7511_is_interrupt_pending.constprop.2':
clk-divider.c:(.text.unlikely+0x16c): undefined reference to `regmap_read'
clk-divider.c:(.text.unlikely+0x184): undefined reference to `regmap_read'
drivers/built-in.o: In function `adv7511_probe':
clk-divider.c:(.devinit.text+0x4bc): undefined reference to `regmap_init_i2c'
clk-divider.c:(.devinit.text+0x4d8): undefined reference to `regmap_read'
clk-divider.c:(.devinit.text+0x4e8): undefined reference to `regmap_write'
clk-divider.c:(.devinit.text+0x4f8): undefined reference to `regmap_write'
clk-divider.c:(.devinit.text+0x508): undefined reference to `regmap_write'
clk-divider.c:(.devinit.text+0x558): undefined reference to `regmap_write'
clk-divider.c:(.devinit.text+0x5b8): undefined reference to `regmap_write'
clk-divider.c:(.devinit.text+0x5cc): undefined reference to `regmap_update_bits'
clk-divider.c:(.devinit.text+0x5f4): undefined reference to `regmap_exit'
drivers/built-in.o: In function `adv7511_remove':
clk-divider.c:(.devexit.text+0x118): undefined reference to `regmap_exit'
drivers/built-in.o:(.rodata+0x4008): undefined reference to `drm_read'
drivers/built-in.o:(.rodata+0x401c): undefined reference to `drm_poll'
drivers/built-in.o:(.rodata+0x4020): undefined reference to `drm_ioctl'
drivers/built-in.o:(.rodata+0x402c): undefined reference to `drm_open'
drivers/built-in.o:(.rodata+0x4034): undefined reference to `drm_release'
drivers/built-in.o:(.data+0x3d88): undefined reference to `drm_helper_connector_dpms'
drivers/built-in.o:(.data+0x3d9c): undefined reference to `drm_helper_probe_single_connector_modes'
drivers/built-in.o:(.data+0x3e1c): undefined reference to `drm_crtc_helper_set_config'
drivers/built-in.o:(.data+0x3f94): undefined reference to `drm_gem_vm_open'
drivers/built-in.o:(.data+0x3f98): undefined reference to `drm_gem_vm_close'
drivers/built-in.o:(.data+0x3fc8): undefined reference to `drm_fb_helper_check_var'
drivers/built-in.o:(.data+0x3fcc): undefined reference to `drm_fb_helper_set_par'
drivers/built-in.o:(.data+0x3fd4): undefined reference to `drm_fb_helper_setcmap'
drivers/built-in.o:(.data+0x3fd8): undefined reference to `drm_fb_helper_blank'
drivers/built-in.o:(.data+0x3fdc): undefined reference to `drm_fb_helper_pan_display'
drivers/built-in.o:(.data+0x3fe0): undefined reference to `sys_fillrect'
drivers/built-in.o:(.data+0x3fe4): undefined reference to `sys_copyarea'
drivers/built-in.o:(.data+0x3fe8): undefined reference to `sys_imageblit'
make: *** [.tmp_vmlinux1] Error 1
root@localhost:~/projects/linux-digilent#

Is it because I didn't apply patches or some other things went wrong?

It looks like clk-divider.c depends on some modules which were opted out. These things don't happen when the configuration system's dependencies are set up properly, but they do happen sometimes...

I couldn't see anything that is related to Xillinux' patches.

Anyhow, these things are unpleasant to track down, and there's a rather straightforward fix for it. So I can't find much point in tweaking the existing setting, rather than just applying the patches (and get the .config file along).

Regards,
   Eli

make XXX_defconfig should not be used when applying Xillinux' patches, because the latter take care of adding the .config file. Not the standard way to do it, but it's convenient.