xcc700: Self-hosting mini C compiler for esp32 / Xtensa
Why look into this project?
A compiler you can fully grasp and tweak, on a modern platform where small is still cool.
Basic features, not too entrenched, easy to morph into your language of choice.
Reusable ELF writer, and a basic Xtensa bytecodes emitter.
Possibly useful for hotfixes, CI, quick test/debug turnaround on esp32.
Sample output
./xcc700 xcc700.c -o xcc700.elf [ xcc700 ] BUILD COMPLETED > OK > IN : 700 Lines / 7977 Tokens > SYM : 69 Funcs / 91 Globals > REL : 152 Literals / 1027 Patches > MEM : 1041 B .rodata / 17120 B .bss > OUT : 27735 B .text / 33300 B ELF [ 40 ms ] >> 17500 Lines/sec <<
Note: that timing is from esp32-s3. Timings on Mac/POSIX will be reported 1000x slower than they are, as on esp32 ticks are millisecond, and on POSIX microsecond, but there is no adjustment here.
Video Demo
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