linux-kernel - cc1: error: unrecognized command line option "-Wno-maybe-uninitialized"

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Message-ID: <201701131834.BsUjtXaC%fengguang.wu@intel.com>
Date:   Fri, 13 Jan 2017 18:40:41 +0800
From:   kbuild test robot <fengguang.wu@...el.com>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     kbuild-all@...org, linux-kernel@...r.kernel.org
Subject: cc1: error: unrecognized command line option
 "-Wno-maybe-uninitialized"

Hi Arnd,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   557ed56cc75e0a33c15ba438734a280bac23bd32
commit: a76bcf557ef408b368cf26f52a60865bfc27b632 Kbuild: enable -Wmaybe-uninitialized warning for "make W=1"
date:   9 weeks ago
config: x86_64-randconfig-s1-01131717 (attached as .config)
compiler: gcc-4.4 (Debian 4.4.7-8) 4.4.7
reproduce:
        git checkout a76bcf557ef408b368cf26f52a60865bfc27b632
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All errors (new ones prefixed by >>):

   cc1: warnings being treated as errors
   drivers/gpu/drm/i915/intel_ringbuffer.c: In function 'intel_ring_setup_status_page':
   drivers/gpu/drm/i915/intel_ringbuffer.c:438: error: 'mmio.reg' may be used uninitialized in this function
   At top level:
>> cc1: error: unrecognized command line option "-Wno-maybe-uninitialized"
--
   cc1: warnings being treated as errors
   drivers/gpu/drm/i915/intel_csr.c: In function 'parse_csr_fw':
   drivers/gpu/drm/i915/intel_csr.c:194: error: 'si' may be used uninitialized in this function
   drivers/gpu/drm/i915/intel_csr.c:194: note: 'si' was declared here
   At top level:
>> cc1: error: unrecognized command line option "-Wno-maybe-uninitialized"
--
   cc1: warnings being treated as errors
   drivers/gpu/drm/i915/intel_sprite.c: In function 'intel_check_sprite_plane':
   drivers/gpu/drm/i915/intel_sprite.c:763: error: 'src_x' may be used uninitialized in this function
   drivers/gpu/drm/i915/intel_sprite.c:763: error: 'src_y' may be used uninitialized in this function
   drivers/gpu/drm/i915/intel_sprite.c:763: error: 'src_w' may be used uninitialized in this function
   drivers/gpu/drm/i915/intel_sprite.c:763: error: 'src_h' may be used uninitialized in this function
   At top level:
>> cc1: error: unrecognized command line option "-Wno-maybe-uninitialized"
--
   cc1: warnings being treated as errors
   drivers/gpu/drm/i915/intel_tv.c: In function 'intel_tv_detect':
   drivers/gpu/drm/i915/intel_tv.c:1315: error: 'type' may be used uninitialized in this function
   At top level:
>> cc1: error: unrecognized command line option "-Wno-maybe-uninitialized"
--
   cc1: warnings being treated as errors
   drivers/gpu/drm/i915/i915_gem_gtt.c: In function 'gen8_ggtt_insert_entries':
   drivers/gpu/drm/i915/i915_gem_gtt.c:2341: error: 'gtt_entry' may be used uninitialized in this function
   drivers/gpu/drm/i915/i915_gem_gtt.c: In function 'gen6_ggtt_insert_entries':
   drivers/gpu/drm/i915/i915_gem_gtt.c:2438: error: 'gtt_entry' may be used uninitialized in this function
   At top level:
>> cc1: error: unrecognized command line option "-Wno-maybe-uninitialized"
--
   cc1: warnings being treated as errors
   drivers/gpu/drm/i915/i915_gem.c: In function 'i915_gem_object_map':
   drivers/gpu/drm/i915/i915_gem.c:2382: error: 'pgprot.pgprot' may be used uninitialized in this function
   At top level:
>> cc1: error: unrecognized command line option "-Wno-maybe-uninitialized"

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