SDCC - free open source, retargettable, optimizing ISO C compiler

Welcome to SDCC, free open source, retargettable, optimizing ISO C compiler suite that targets a growing list of processors including the Intel MCS-51 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 (e.g. Game Boy), Rabbit 2000, Rabbit 2000A/3000, Rabbit 3000A, TLCS-90), STMicroelectronics STM8, Padauk PDK14 and PDK15 and MOS 6502. Work is in progress on supporting the Padauk PDK13 target. There are unmaintained Microchip PIC16 and PIC18 targets. It can be retargeted for other microprocessors.

See share/sdcc/doc/INSTALL.txt for the installation instructions for the binary kits.

See the share/sdcc/doc directory for more documentation.

See http://sdcc.sourceforge.net/ for the latest information on sdcc.

Licenses

SDCC compiler suite is a collection of several components derived from different sources with different FOSS licenses. See the sdccman.pdf document, chapter "SDCC Suite Licenses" for details.

The code or object files generated by SDCC suite are not licensed, so they can be used in FLOSS or proprietary (closed source) applications.

The great majority of sdcc run-time libraries are licensed under the GPLv2+LE which allows linking of sdcc run time libraries with proprietary (closed source) applications.

Exception are pic device libraries and header files which are derived from Microchip header (.inc) and linker script (.lkr) files. Microchip requires that "The header files should state that they are only to be used with authentic Microchip devices" which makes them incompatible with the GPL. Pic device libraries and header files are located at non-free/lib and non-free/include directories respectively. Sdcc should be run with the --use-non-free command line option in order to include the potentially non-free header files and libraries.

However: Many think that the Microchip requirement is not legally enforceable, arguing that the header files only contain noncopyrightable facts.

See:

• http://www.gnu.org/copyleft/gpl.html
• http://sourceforge.net/apps/trac/sdcc/wiki/SDCC%20Library%20Licenses

Support

SDCC compiler suite is a collaborative effort between a group of volunteers. Please feel free to report bugs via the Sourceforge bug tracker, or to ask questions on the user mailing list. See:

• http://sourceforge.net/tracker/?atid=100599&group_id=599&func=browse
• http://sourceforge.net/mail/?group_id=599

Notes:

• The ds400, pic14 and pic16 are currently experimental, but work is in progress. Please check http://sdcc.sourceforge.net/snap.php for snapshots.
• The TININative, avr and xa51 targets are no longer maintained.

Roadmap

• COPYING - GPL v2
• debugger/ - sdcdb debugger
• device/ - Device libraries and examples
• doc/ - sdcc and target specific documentation
• sdas/ - Assemblers and linkers, derived from asxxxx
• sim/ - ucsim simulator
• src/ - Source to the C compiler and targets
• support/ - Libraries and apps that may not be provided by your system.

Authors and interested persons

• Sandeep Dutta
• Jean Loius-VERN
• Daniel Drotos
• Kevin Vigor
• Johan Knol <johan.knol AT iduna.nl>
• Scott Dattalo
• Karl Bongers
• Bernhard Held
• Frieder Ferlemann <frieder.ferlemann AT web.de>
• Jesus Calvino-Fraga
• Borut Razem <borut.razem AT siol.net>
• Vangelis Rokas
• Erik Petrich
• Paul Stoffregen
• Michael Hope <nz_michaelh AT yahoo.com>
• Maarten Brock <sourceforge.brock AT dse.nl>
• Raphael Neider
• Hans-Juergen Dorn <hans.dorn AT apl-landau.de>
• Klaus Flittner <klaus_flittner AT gmx.de>
• Philipp Klaus Krause
• Leland Morrison <enigmalee.AT.sourceforget.net>
• Molnar Karoly
• Ben Shi <powerstudio1st AT 163.com>

SDCC includes code from:

• Alan Baldwin Initial version of ASXXXX and ASLINK.
• John Hartman Porting ASXXXX and ASLINK for 8051.
• Dmitry S. Obukhov malloc and serial I/O routines.
• Pascal Felber Some of the Z80 related files are borrowed from the Gameboy Development Kit (GBDK).
• The GCC development team http://gcc.gnu.org/ for GNU C preprocessor, the basis of sdcpp preprocessor and gcc test suite, partially included into the SDCC regression test suite
• The GNU Binutils development team http://www.gnu.org/software/binutils/ for GNU Binutils, the basis of sdbinutils
• Boost Community http://www.boost.org/ for Boost C++ libraries used in sdcc compiler
• Timo Bingmann http://idlebox.net/2007/stx-btree/ for TX B+ Tree C++ Template Classes used in sdcc compiler
• Malini Dutta Sandeep's wife, for her patience and support.