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 9.3.0 and earmv5*.

mknative-gcc for GCC 8.3 and all ports.

generate mknative-gcc for GCC 5.3 and all the arm targets.
minor regen for x86 and sparc*

regen gcc mknative files for new complex and more.

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

merge GCC 4.8 build.