/bin/sh: line 0: [: -ge: unary operator expected

[kbuild test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   691429e13dfaf5b0994b07cc166db41bd608ee3d
commit: 5188129b8c9f58ba089bfd3809a163a8c087c797 MIPS: Loongson-3: Improve -march option and move it to Platform
date:   5 weeks ago
config: mips-allnoconfig (attached as .config)
reproduce:
        wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 5188129b8c9f58ba089bfd3809a163a8c087c797
        # save the attached .config to linux build tree
        make.cross ARCH=mips 

All errors (new ones prefixed by >>):

   awk: scripts/ld-version.sh: line 4: regular expression compile failed (missing '(')
   .*)
>> /bin/sh: line 0: [: -ge: unary operator expected
--
   awk: scripts/ld-version.sh: line 4: regular expression compile failed (missing '(')
   .*)
>> /bin/sh: line 0: [: -ge: unary operator expected
   awk: scripts/ld-version.sh: line 4: regular expression compile failed (missing '(')
   .*)
>> /bin/sh: line 0: [: -ge: unary operator expected
   awk: scripts/ld-version.sh: line 4: regular expression compile failed (missing '(')
   .*)
   /bin/sh: line 0: [: -lt: unary operator expected
   awk: scripts/ld-version.sh: line 4: regular expression compile failed (missing '(')
   .*)
>> /bin/sh: line 0: [: -ge: unary operator expected
--
   awk: scripts/ld-version.sh: line 4: regular expression compile failed (missing '(')
   .*)
>> /bin/sh: line 0: [: -ge: unary operator expected
   awk: scripts/ld-version.sh: line 4: regular expression compile failed (missing '(')
   .*)
>> /bin/sh: line 0: [: -ge: unary operator expected
   awk: scripts/ld-version.sh: line 4: regular expression compile failed (missing '(')
   .*)
>> /bin/sh: line 0: [: -ge: unary operator expected

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