SDCC is a retargettable, optimizing Standard C (ANSI C89, ISO C99,
ISO C11, ISO C23) compiler suite that targets the Intel MCS51 based
microprocessors (8031, 8032, 8051, 8052, etc.), Maxim (formerly
Dallas) DS80C390 variants, Freescale (formerly Motorola) HC08 based
(hc08, s08), Zilog Z80 based MCUs (Z80, Z80N, Z180, SM83, Rabbit
2000, 2000A, 3000A, SM83, TLCS-90, eZ80, R800), Padauk (pdk14,
pdk15), STMicroelectronics STM8, MOS 6502 and WDC 65C02. Work is
in progress on supporting the Rabbit 4000, 5000, 6000, Padauk pdk13
and the f8 and f8l targets; Microchip PIC16 and PIC18 targets are
unmaintained. SDCC can be retargeted for other microprocessors.

Homepage:
https://sdcc.sourceforge.net/
