How I can emulate a big endian platform on a x86? I need to get a big endian platform to develop with `gcc` and `g++`, what is a solution for that? I know that the SPARC is one of those big endian architectures, but I have no idea what OSs can run on it and how to emulate a SPARC machine under Linux; I also should note that I need any big endian that I can emulate on an X86 but with `g++` available on it.

Why Sparc specifically? ARM or MIPS is easier to emulate or to get in hardware, both are bi-endian, and both are supported by Linux in either endianness.

There doesn't seem to be a well-maintained ARM big-endian port, your best bet for ARM seems to be the old Debian NSLU2 port. For MIPS you have the MIPS port.

QEMU can emulate all of these CPUs.