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build failure: gcc: error: unrecognized command line option '-mips1'

During the "Installing C library headers" step, I several of the
following message repeated:
[ERROR]    gcc: error: unrecognized command line option '-mips1'
[ERROR]    gcc: error: unrecognized argument in option '-mabi=32'


I'm pretty sure the bug is with my build system's gcc installation.
The man page shows "-mips1" is an option and it's equivalent to
"-march=mips1". If I run "gcc -mips1" at the command line, it gives
the unrecognized option error, but if I run "gcc -march=mips1", it
doesn't complain about the option. Does this seem right?

Additionally, I set CT_ARCH_ARCH to "mips2", so I'm not sure why ct-ng
is even using mips1; any ideas there?

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