M2-Planet

• Added support for pointer arithmetic for += and -= operators (not yet supported for + and -).
• Added support for __LINE__ macro.
• Added support for __FILE__ macro.
• Added support for __DATE__ macro which will always be Jan 1 1970 and __TIME__ which will always be 00:00:00.
• Added support for __STDC__, __STDC_HOSTED__, and __STDC_VERSION__ macros. __STDC_VERSION__ claims support for C89.
• Added initial support for function-like macros.
• enum support.
• Added _Bool type.
• Added support for west-const for variables and function arguments.
• Improved RISC-V support to work with large types (size > 11 bits).
• Added support for octal and \? escape codes.
• Make arguments that aren't options be considered files.
• Make help output more accurately describe available options.
• Added support for multiple variable declarations per statement.
• Added support for static/inline/_Noreturn qualifiers on globals.
• Added support for static local variables.
• Make implicit return load 0 for the main function.
• Fix dereferencing char pointers (or other types whose size is not equal to register size).
• Added support for multi token integer types (unsigned int, long long, long long int, etc.).
• Allow anonymous structs/enums and inline typedef.
• Added support arrays on the stack.
• Added support for using variables in sizeof, including dereferencing.
• Added support for string literals in sizeof.
• Added support for variables in loop bodies (doesn't work with goto yet).
• Added __M2C__, __M2C_MINOR__, and __M2C_PATCHLEVEL__ defines.
• Add support for locals in loops.
• Fixed multiple chained uses of dot and arrow operators segfaulting.
• Added support for initializer lists for global integer arrays.
• Added support for global arrays without explicit size when initializer lists are used.
• Improved switch statement to support constant expressions in case statements.

M2-Mesoplanet

• Make arguments that aren't options be considered files.
• Make help output more accurately describe available options.
• Fix make install not working.

M2libc

• Convert setenv/getenv calls to use C-like pointer arithmetic.
• Add stdbool.h
• Fixed a few aarch64 syscalls.
• Add support for symlink system call.
• Make retrieving UEFI variables conform to spec.
• Removed undefined behavior in int2str.

mescc-tools

• Added support for %&! to M1 for knight architecture and allowed @$ syntax.

mescc-tools-extra

• Mount /dev/pts in the wrap environment.
• Add support for symlinks in untar.
• Switch ungz to use C-like pointer arithmetic.
• unxz: Do not crash when input file is not found.

bootstrap-seeds

• Reduced POSIX/x86/hex0-seed from 190 to 181 bytes.
• Reduced POSIX/x86/kaem-optional-seed from 640 to 632 bytes.
• Reduced POSIX/AMD64/hex0-seed from 292 to 229 bytes.

stage0-posix-x86

• Updated hex0 source to match the one in bootstrap-seeds.

stage0-posix-amd64

stage0-posix-aarch64

stage0-posix-riscv64

stage0-posix-riscv32