Amiga Software Development in 2017
Sebastian Bergmann
Sebastian Bergmann
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_ _:_________/_________________/\_________\___ /\_______
¦ ____/___.________ / ________ / / _____/____:__ _ __/\__
: \__ | _/ _/ \_ \ / / ___/ ¦ \ QQ /
_ _¦______| |______\ \____| \_______/_______________¦__ _ /_\/_\
| |-Mo! \_____/ l______/aC! : \/
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\ \| | \_ \ l/ / \ / ___/ ¦ _/ _/
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l______/ \______/ · \_____/
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: _____\ / _| / / / / / /\ \ / :
:/ / //___________\ _/| //_ _|_____\_______\ \\ /______\
: /______\ /____________\\| |÷e÷ \__________/___\ :
:_____\ |______| :
: :
- Desaster Fame Design - __ /\
\// \
__________ ______ / _______ _______. -Mo!/aL-
\ _\_____. \ / \ / __\_. _|____ _________
\ \ \ _|_ _\ \ _\ \/ |_ _\ /_ _ /
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By day, I help development teams as a consultant to successfully craft software using PHP.
By night, I enjoy Amiga retrocomputing
as well as hacking on open source software.
Disclaimer
I stand on the shoulders of giants.
Stefan Franke, Krystian Bacławski, Christian Vogelgsang, and others are the real heroes.
C
"Hello World" C Example
Compile hello.c
Invoke the SAS/C linker
We can now execute our freshly compiled and linked executable
Do we have to do this
on a real Amiga?
Richard Löwenstein working on Reshoot at Amiga30.de
(macOS with XCode and ASM-One inside FS-UAE)
No, we do not have to do this
on a real Amiga!
“It should not be a surprise that countless Amiga users migrated to Linux and other open-source OSs as the Amiga's necessary ultimate fate became clear, for much of the spirit of the Amiga free-software community persisted in these communities without being tied to a single corporation's decisions and fate. Indeed, the Amiga's fate serves as an object lesson for the modern open-source movement, speaking to the way that even excellent hardware and software can wither when said excellence is proprietary and closed source.”
https://kernel.org
https://docker.com
Docker
“Containers are UNIX processes,
not lightweight virtual machines.”
Docker
“Docker is a tool that can package an application and its dependencies in a virtual container that can run on any Linux [machine] ...”
"Docker: A 'Shipping Container' for Linux Code", Katherine Noyes
Docker
Please note that Docker is not required at all to use the tools shown in this presentation.
IMO, Docker makes it a lot easier to use these tools.
Especially since some of the tools require a 32bit Linux system.
SAS/C
SAS/C
(run through Virtual AmigaOS)
Virtual AmigaOS (vamos)
- Developed by Christian Vogelgsang
- Uses Musashi M68K CPU Emulator
- Emulates (parts of) dos.library and exec.library
- Executes M68K/AmigaOS binaries
- GitHub: cnvogelg/amitools
- GitHub: sebastianbergmann/docker-amitools
- Docker Hub: sebastianbergmann/amitools
"Hello World" C Example
Run a command in a new container
Make $HOME available as /host inside the container
Make /opt/amiga/sc available as /sc inside the container
Automatically remove the container when it exits
Use the sebastianbergmann/amitools image
Execute the vamos command inside the container
(with debugging messages suppressed)
Use /sc as AmigaOS volume sc:
Define some AmigaOS ASSIGNs
Define AmigaOS command search path
Invoke the SAS/C compiler
Compile /host/hello.c
(which is $HOME/hello.c on the host)
We now have an AmigaOS object in /host/hello.o
(which is $HOME/hello.o on the host)
When you use a Docker image for the first time ...
... it is automatically downloaded from hub.docker.com
We now have an AmigaOS object in /host/hello.o
(which is $HOME/hello.o on the host)
Invoke the SAS/C linker
We now have an AmigaOS executable in /host/hello
(which is $HOME/hello on the host)
We now have an AmigaOS executable in /host/hello
(which is $HOME/hello on the host)
We can now execute our freshly compiled and linked executable with vamos
Lets put SAS/C inside the Docker image
Dockerfile
Line 1: Use sebastianbergmann/amitools as base image
Line 3: Extract sasc658.tar.xz to /sc (inside the new image)
Line 4: Copy _vamosrc to /root/.vamosrc (inside the new image)
_vamosrc
Building the Docker image
Invoke the SAS/C compiler
Invoke the SAS/C linker
We can now execute our freshly compiled and linked executable
GNU make build automation script
GNU make in action
What about GUI applications?
C program that opens a window
Execute M68K/AmigaOS binary with FS-UAE
docker-execute-amiga
- Uses Docker-ized FS-UAE emulation
- Executes M68K/AmigaOS binaries
- GitHub: sebastianbergmann/docker-execute-amiga
Assembler
ASMTwo
Do we have to do this
on a real Amiga?
Cross-Compiler
“A cross-compiler is a compiler capable of creating executable code for a platform other than the one on which the compiler is running.”
For example, a compiler that runs on a Linux PC but generates code that runs on an Amiga is a cross-compiler.
Cross-Compiler
“A cross-compiler is a compiler capable of creating executable code for a platform other than the one on which the compiler is running.”
For example, a compiler that runs on a Linux PC but generates code that runs on an Amiga is a cross-compiler.
VASM
- Free assembler
- Supports M68K CPUs and Amiga Hunk binary format
- Developed by Volker Barthelmann and Frank Wille
- http://sun.hasenbraten.de/vasm
Download http://coppershade.org/asmskool/Tut3.S example
Invoke the assembler
We now have an AmigaOS executable in /host/Tut3
(which is $HOME/Tut3 on the host)
GNU Compiler Collection (GCC)
- Developed by the GNU Project since 1987
- Open Source
- Compilers for C/C++ and other languages
- Still has support for M68K CPUs
- AmigaOS support resurrected by
Krystian Bacławski and Stefan Franke - GitHub: cahirwpz/amigaos-cross-toolchain
- GitHub: bebbo/amigaos-cross-toolchain
- GitHub: sebastianbergmann/docker-amigaos-cross-toolchain
- Docker Hub: sebastianbergmann/m68k-amigaos-bebbo
Compile (and link) hello.c with GCC
We can now execute our freshly compiled and linked executable