[Bug 1911798] Re: 20.04 - You are building kernel with non-retpoline compiler. Please update your compiler

[Hans Joachim Desserud]

** Tags added: focal

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Title:
  20.04 - You are building kernel with non-retpoline compiler. Please
  update your compiler

Status in gcc-9-cross package in Ubuntu:
  New

Bug description:
  On 20.04 amd64 with gcc-{9,10}-arm-linux-gnueabihf packages installed
  in order to cross compile for a TI arm beagle-like board  kernel I
  get:

  $ echo $OOTB
  ../builds/arm-beagle
  $ echo $CROSS_COMPILE
  arm-linux-gnueabihf-

  $ make -j7 arch=arm O=$OOTB prepare zImage modules dtbs |& tee /tmp/build.log
  make[1]: Entering directory '/media/tj/SourceCode/builds/arm-beagle'
    GEN     ./Makefile
  scripts/kconfig/conf  --syncconfig Kconfig
  You are building kernel with non-retpoline compiler.
  Please update your compiler.
  make[1]: *** [arch/x86/Makefile:317: checkbin] Error 1
  make[1]: Leaving directory '/media/tj/SourceCode/builds/arm-beagle'
  make: *** [Makefile:146: sub-make] Error 2

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