FWIW I fixed a similar issue in supertuxkart recently by patching the .S
file to have a ".fpu vfp" directive in it -- although probably ".arch
armv7-a+fp" would have been more appropriate.

It does seem strange that "gcc -march foo bar.s" does not pass -march to
the assembler but I have no real idea if that expectation is grounded in
reality -- when compiling C, the value of march is passed to the
assembler via a directive so maybe "march" is really only an argument to
gcc when gcc is doing the compiling and not when it is being used as a
frontend to the assembler.

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https://bugs.launchpad.net/bugs/1939379

Title:
  ARM kernel builds fail with GCC 11

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