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83 lines
2.1 KiB
Markdown
83 lines
2.1 KiB
Markdown
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[← Home](../README.md) · [Toolchain](README.md)
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# m68k-amigaos-gcc — Cross-Compiler
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## Overview
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`m68k-amigaos-gcc` is the GCC-based cross-compiler for AmigaOS, typically based on GCC 2.95 (legacy) or GCC 6.5 (bebbo's fork). It produces Amiga hunk-format executables and supports all 68k variants.
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---
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## Installation (bebbo's toolchain)
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```bash
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# Docker-based (recommended):
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docker pull bebbo/amiga-gcc
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docker run -v $(pwd):/work bebbo/amiga-gcc m68k-amigaos-gcc -o hello hello.c
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# Native build (Linux/macOS):
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# NOTE: bebbo removed his repos from GitHub. Use Codeberg or his personal git:
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git clone https://codeberg.org/bebbo/amiga-gcc.git
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# Mirror: https://franke.ms/git/bebbo/amiga-gcc
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cd amiga-gcc
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make update
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make all -j$(nproc)
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# Installs to /opt/amiga/
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```
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---
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## Usage
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```bash
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# Compile and link:
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m68k-amigaos-gcc -noixemul -o hello hello.c
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# Common flags:
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# -noixemul — use libnix (no ixemul.library dependency)
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# -m68000 — target 68000 (default)
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# -m68020 — target 68020+
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# -m68040 — target 68040
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# -m68060 — target 68060
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# -m68881 — use 68881/68882 FPU
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# -Os — optimise for size
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# -O2 — optimise for speed
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# -fomit-frame-pointer — free up A5
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# -fbaserel — base-relative addressing (small data model)
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# -resident — generate resident-capable code
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# -g — include debug info (HUNK_DEBUG)
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# -s — strip symbols
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```
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---
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## Startup Code
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| Startup | Description |
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| `libnix` | Minimal C runtime, no shared library dependency |
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| `ixemul` | Unix-like C runtime (requires ixemul.library) |
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| `crt0.o` | Raw startup — no C runtime at all |
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---
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## Inline/Pragma System Calls
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```c
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/* Use inline headers to call library functions via registers: */
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#include <inline/exec.h>
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#include <inline/dos.h>
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/* Or use proto headers (auto-select inline vs pragma): */
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#include <proto/exec.h>
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#include <proto/dos.h>
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```
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---
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## References
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- Codeberg: https://codeberg.org/bebbo/amiga-gcc
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- Mirror: https://franke.ms/git/bebbo/amiga-gcc
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- GCC 6.5 m68k cross-compiler documentation
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