mirror of
https://github.com/alfishe/amiga-bootcamp.git
synced 2026-06-13 00:26:28 +00:00
64 lines
1.6 KiB
Markdown
64 lines
1.6 KiB
Markdown
|
[← Home](../README.md) · [Toolchain](README.md)
|
||
|
|
|
||
|
|
# SAS/C 6.x — Compiler Reference
|
||
|
|
|
||
|
|
## Overview
|
||
|
|
|
||
|
|
SAS/C (originally Lattice C) was the dominant commercial C compiler for AmigaOS. Version 6.58 is the final release. It produces optimised 68k code with full AmigaOS integration, including pragma-based system calls and SAS-specific debug formats.
|
||
|
|
|
||
|
|
---
|
||
|
|
|
||
|
|
## Key Features
|
||
|
|
|
||
|
|
| Feature | Description |
|
||
|
|
|---|---|
|
||
|
|
| Register args | Automatic register parameter passing |
|
||
|
|
| Pragmas | `#pragma libcall` for direct library LVO calls |
|
||
|
|
| Small data | A4-relative addressing for globals |
|
||
|
|
| Profiling | Built-in `sprof` profiler |
|
||
|
|
| Debug format | SAS stabs (`=APS` tag in HUNK_DEBUG) |
|
||
|
|
| Optimizer | Global optimizer (`lc -O`) with peephole |
|
||
|
|
|
||
|
|
---
|
||
|
|
|
||
|
|
## Pragma Format
|
||
|
|
|
||
|
|
```c
|
||
|
|
/* dos_pragmas.h — generated from FD files: */
|
||
|
|
#pragma libcall DOSBase Open 1e 2102
|
||
|
|
/* ^^ ^^ ^^^^
|
||
|
|
name LVO reg-encoding
|
||
|
|
reg-encoding: 2=D2, 1=D1, 0=result in D0, 2 args */
|
||
|
|
|
||
|
|
#pragma libcall DOSBase Close 24 101
|
||
|
|
#pragma libcall DOSBase Read 2a 32103
|
||
|
|
```
|
||
|
|
|
||
|
|
Register encoding: digits map to registers (1=D0, 2=D1, ... 9=A0, A=A1, etc.)
|
||
|
|
|
||
|
|
---
|
||
|
|
|
||
|
|
## Compilation
|
||
|
|
|
||
|
|
```
|
||
|
|
lc -v -O -b0 -j73 hello.c ; compile
|
||
|
|
blink hello.o TO hello LIB lib:sc.lib lib:amiga.lib ; link
|
||
|
|
```
|
||
|
|
|
||
|
|
| Flag | Meaning |
|
||
|
|
|---|---|
|
||
|
|
| `-v` | Verbose |
|
||
|
|
| `-O` | Optimise |
|
||
|
|
| `-b0` | Small data model (A4-relative) |
|
||
|
|
| `-b1` | Large data model |
|
||
|
|
| `-j73` | Generate 68020/68881 code |
|
||
|
|
| `-d0` | No debug info |
|
||
|
|
| `-d2` | Full debug info |
|
||
|
|
|
||
|
|
---
|
||
|
|
|
||
|
|
## References
|
||
|
|
|
||
|
|
- SAS/C 6.x User Manual
|
||
|
|
- NDK39 pragma files: `NDK_3.9/Include/pragmas/`
|