mknative-gcc for GCC 12.3.0 on arm64*, arm* besides armv4, ppc, alpha,
sh, sparc*, mips*, riscv*, vax, hppa, ia64, and m68*.

earmv4 didn't start properly, and powerpc64 failed to build, but all
the

mknative-gcc for GCC 12.3.0 on arm64*, arm* besides armv4, ppc, alpha,
sh, sparc*, mips*, riscv*, vax, hppa, ia64, and m68*.

earmv4 didn't start properly, and powerpc64 failed to build, but all
the rest seem to be OK now.

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mknative-gcc for GCC 10 and almost all platforms. one of the
myriad of arm platforms, and the powerpc* platforms are not
yet done.

mknative-gcc for gcc 9.3.0 and arm64, alpha, hppa, ia64, m68*, mipseb,
powerpc, riscv*, sh3*, sparc*, vax.

move data from README.gcc8 to README.gcc9.

regen mknative with symver no longer disabled.

mostly mknative-gcc for i386 and sparc and gcc 7.4.

sparc gets to libstdc++, and i386 has the same libgcc issue as amd64.

mknative-gcc for alpha, earm, i386, mips64eb, powerpc, sparc,
sparc64, and x86-64. tree does not fully build yet, however.

mknative-gcc for GCC 5.3 and sparc

mknative-gcc 4.8 for most platforms. missing: ppc64, m68010, ia64, coldfire.

merge GCC 4.8 build.

libgomp mknative-gcc files for everyone else.