GitHub Actions Linux x86 Build

.github/CI_README.md

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+# VICAR GitHub Actions CI/CD Setup
+
+Automated builds for VICAR using GitHub Actions.
+
+## ✨ Zero Setup Required
+
+GitHub Actions is automatically enabled - just push to trigger a build!
+
+## 🚀 Quick Start
+
+### Automatic Build
+```bash
+git push origin main
+```
+
+### Manual Build
+1. Go to [Actions tab](../../actions)
+2. Select "Build VICAR"
+3. Click "Run workflow"
+4. Choose options and run
+
+## 📋 What Gets Built
+
+- ✅ Core VICAR (RTL, TAE, subsystems)
+- ✅ VISOR (109 Mars mission programs)
+- ✅ Java components (JavaVicarIO, JadeDisplay, JADIS, SITH, JPIG)
+- ✅ P1, P2, P3 image processing programs
+- ✅ MARS subsystem
+
+**Build Time:** ~1-2 hours
+
+## 📦 Workflows
+
+### `build-vicar.yml` (Main)
+- Uses Rocky Linux 8 container (100% RHEL 8 compatible)
+- Downloads open source externals from GitHub releases
+- Triggers: push, PR, weekly schedule, manual
+- Stores logs and binaries as artifacts
+
+**Build Environment:**
+- Rocky Linux 8
+- 100% binary compatible with RHEL 8 / Oracle Linux 8
+- Matches internal JPL build environment
+- Free and open source (no subscription needed)
+
+## 📊 Monitor Builds
+
+1. **Actions Tab** - See all workflow runs
+2. **Click a run** - View detailed logs
+3. **Download artifacts** - Get logs and binaries
+
+## 📖 Documentation
+
+Full documentation in [`.github/workflows/README.md`](.github/workflows/README.md):
+- Customization options
+- Adding camera models
+- Caching strategies
+- Troubleshooting guide
+- Advanced features
+
+## 💰 Cost
+
+- **Public repos:** FREE unlimited builds ✅
+- **Private repos:** 2,000 free minutes/month, then $0.008/min
+
+## 🆘 Need Help?
+
+- 📖 [Full Documentation](.github/workflows/README.md)
+- 💬 [VICAR Google Group](https://groups.google.com/forum/#!forum/vicar-open-source/)
+- 📧 vicar_help@jpl.nasa.gov
+- 🐛 [File an Issue](../../issues)
+
+## 📌 Status
+
+[![Build VICAR](../../actions/workflows/build-vicar.yml/badge.svg)](../../actions/workflows/build-vicar.yml)
+
+---
+
+**Ready to build!** Push your code and watch it compile automatically. 🎉