Cross toolchain files for Besta RTOS homebrew development

Here are some predefined cross files for compiling Besta RTOS homebrews.

muteki-shims-specific information: To add a cross file for a new toolchain (e.g. LLVM), note that currently muteki-shims assumes GNU Assembler syntax and other assemblers are untested. Support for new assembler syntax can be added in syscall_def/gen_syscall_shim.py.

arm-bestartos

(Compiler does not exist anymore)

For a dedicated toolchain named arm-bestartos, should be able to output COFF/PE objects directly.

Can be used to build DLLs.

arm-mingw32ce

Not actively supported

For Max Kellermann's CeGCC fork. Compiles in freestanding mode and no Windows CE-specific code will be included.

Can be used to build DLLs.

arm-none-bestaeabi-*

For our custom Arm binutils and GCC that output flavored AAELF. Use arm-none-bestaeabi-arm9 to solely target Arm926ej-s devices. Similar with arm-none-bestaeabi-arm11. If in doubt or for maximum binary compatibility, use arm-none-bestaeabi-arm7.

Cannot be used to build DLLs, although AAELF shared object to DLL conversion is being looked into.

arm-none-bestaeabi

Same as the other arm-none-bestaeabi-* files but C-only and assumes default target to be Arm7TDMI. Used during toolchain compilation.

arm-none-eabi

Not actively supported

For stock Arm GCC outputting AAELF.

Cannot be used to build DLLs.

arm-none-eabi-devkitarm

Not actively supported

For devkitARM's Arm GCC outputting AAELF.

Cannot be used to build DLLs.