Files

Aaron D. Lee c96c595c78 Add robust jpegio ARM64 patching system

- Create rpi/patches/ directory with multi-strategy patching
- Patch tries: patch file → sed → Python regex → already-patched detection
- Fix jpegio patch to handle multiple -m64 occurrences
- Update docs to use wget instead of curl|bash (stdin conflict with read)
- Update SSH examples to use admin@stegasoo.local

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

2026-01-03 20:22:55 -05:00

jpegio

Add robust jpegio ARM64 patching system

2026-01-03 20:22:55 -05:00

README.md

Add robust jpegio ARM64 patching system

2026-01-03 20:22:55 -05:00

README.md

RPi Patches

This directory contains patches for dependencies that need modifications to build on ARM64.

Structure

patches/
  <package>/
    arm64.patch       # Standard unified diff patch file
    apply-patch.sh    # Script with fallback strategies

How It Works

The apply-patch.sh script tries multiple strategies in order:

Patch file - Apply the .patch file using patch -p1
Sed fallback - Use sed for simple string replacements
Python fallback - Use regex for flexible pattern matching

This layered approach handles:

Exact matches (patch file works)
Minor upstream changes (sed catches variations)
Significant changes (Python regex is most flexible)
Already patched files (detected and skipped)

Adding a New Patch

Create a directory: patches/<package>/
Create the patch file: git diff > arm64.patch
Create apply-patch.sh with appropriate fallback logic
Update setup.sh to call the patch script

jpegio Patch

The jpegio library includes x86-specific -m64 compiler flags that fail on ARM64. The patch removes these flags by replacing:

cargs.append('-m64')

with:

pass  # ARM64: removed x86-specific -m64 flag

Updating Patches

When upstream changes break a patch:

Clone the new version
Make the necessary modifications
Generate a new patch: diff -u original modified > arm64.patch
Test on a fresh Pi install