Retro68 ======= A GCC-based cross-compilation environment for 68K Macs. Why? Because there is no decent C++11 Compiler targetting Apple's System 6. If that's not a sufficient reason for you, I'm sure you will find someting more useful elsewhere. If you are crazy enough to try it out, please say hello at wolfgang.thaller@gmx.net. Prerequisites ------------- - Linux or Mac OS X - boost - CMake 2.8 - GCC dependencies: GMP 4.2+, MPFR 2.3.1+ and MPC 0.8.0+ - bison version 3.0.2 or later - Apple Universal Interfaces (tested with version 3.1 - see below) - An ancient Mac and/or an emulator. For Ubuntu Linux, the following should help a bit: sudo apt-get install cmake libgmp-dev libmpfr-dev libmpc-dev libboost-all-dev bison On a Mac, get the homebrew package manager and: brew install cmake gmp mpfr libmpc boost bison In theory, you can also run Retro68 on a PowerMac G4 or G5 running Mac OS 10.4 (Tiger). In that case, get the tigerbrew package manager and brew install gcc cmake Apple Universal Interfaces -------------------------- The Universal Interfaces used to be a free download from Apple. However, they have taken the site offline and the license agreement prohibits redistribution, so this might be a bit hard to find nowadays. You do need a version that still supports 68K Mac development. The package might be somewhere in this huge snapshot of Apple's FTP site made by the Internet Archive: https://archive.org/details/ftpsites_developer.apple.com If you have a Mac or some other way to read DiskCopy images, grab the MPW 3.5 image from: http://macintoshgarden.org/apps/macintosh-programmer%E2%80%99s-workshop and use the CIncludes directory from there. Put the C header files into a directory called "CIncludes" at the top level of the Retro68 directory. Building -------- Once you have all the prerequisites, execute these commands from the top level of the Retro68 directory: cd .. mkdir Retro68-build cd Retro68-build sh ../Retro68/build-toolchain.sh The toolchain will be installed in the "toolchain" directory inside the build directory. Sample programs --------------- Sample programs are built in several formats: - On Macs: Real Mac Applications (`ApplicationName.APPL`) - Elsewhere: `ApplicationName.APPL`, `.rsrc/ApplicationName.APPL`, `.finf/ApplicationName.APPL` (BasiliskII/Sheepshaver compatible) - MacBinary files (`ApplicationName.bin`) - Raw HFS disk image (`ApplicationName.dsk`, containing `ApplicationName`) Look under Retro68-build/build-target/ for the compiled binaries. Overview -------- Retro68 is an aggegation of various existing free software projects with a few small key components added. Third Party Components: - binutils 2.20.1 - gcc 4.9.1 with some Retro68-specific hacks - newlib 2.10.1 (inside the gcc directory) - elf2flt (from the ucLinux project's CVS) - hfsutils 3.2.6 (just for convenience) Retro68-Specific Components: - ASFilter - PrepareHeaders.hs - MakeAPPL - libretro - TestApps - a few tiny test programs - Sample Programs: Raytracer, HelloWorld, Launcher, Dialog ### binutils Currently unmodified from the original. Configured for m68k-unknown-elf. ### gcc Various patches and hacks, most importantly: - Changed register usage. - Change the way 1-byte and 2-byte parameters are passed. - support `"\pPascal String Literals"`` - added a pascal calling convention (`pascal` or `__attribute__((__pascal__))`) - added `__attribute__((__raw_inline__(word1, word2, word3)))` to emulate `ONEWORDINLINE` and friends - added `__attribute__((regparam("...")))` to specify custom register calling conventions - added `#pragma parameter` to specify custom register calling conventions ### newlib Standard C library. Currently unmodified. The missing platform-dependent bits haven't been added, instead they are found in 'libretro'. ### elf2flt Converts from ELF to a much simpler binary format. Minor patch: provide symbols around .init and .fini sections ### hfsutils: Included for convenience. No changes. ### prepare-headers.sh: Apply any necessary patches to Apple's headers; currently, this only modifies `ConditionalMacros.h`. ### ASFilter: An evil hack. Installs a replacement for m68k-unknown-elf-as that runs a few regexps on generated assembly code. Two things are changed: 1. Replace occurrences of the RTD instruction, with something that is supported on 68000 as well. GCC currently generates this in `pascal` functions that you declare. 2. While we're at it, remove unnecessary duplicate RTS instructions from MacsBug symbol names. ### MakeAPPL Reads a FLAT executable as output by elf2flt and converts it to a MacBinary file containing a classic Macintosh application. ### libretro Contains startup code (handles relocations) and implementations for some standard library functions. ### Console Contains a library that implements basic text console functionality. ### Sample Program: Hello World The binary is in Retro68-build/build-target/Samples/HelloWorld/. ### Sample Program: Raytracer Calculates a nice 3D image, pixel by pixel. There are two versions: raytracer.c is a straightforward plain C implementation using floating point arithmetic. Raytracer2 makes use of C++ features; it also uses fixed point arithmetic instead of floating point (operator overloading FTW). The binaries are in Retro68-build/build-target/Samples/Raytracer/. ### Sample Program: Launcher A utility program for using Retro68 together with the minivmac emulator. Waits for a disk(image) to be inserted, and if it contains a single application, launches it. After the application exits, the disk is ejected again. This way, you can just drag a .dsk file generated by Retro68 on a minivmac Window to run your application. Intended for System 6 without Multifinder. ### Sample Program: Dialog Shows a simple and useless dialog box. Demonstrates how to use Rez, the resource compiler. The binary is in Retro68-build/build-target/Samples/Dialog/. License ------- The original parts of Retro68 are licensed under GPL3+, as are most other parts. Some parts are licensed GPL2+ or with more liberal licenses. Check the copyright notices in the individual files.