Add Mac-arm64, Linux-aarch64 support and fix mac-intel

[drpaneas]

This PR started for adding supporting only for Mac-arm64, however when I managed it, I've noticed linux-aarch64 was also incredibly easy to add, and also fix mac-intel which was using an outdated image (macos-12).

This has been tested and works in my Apple M2 Pro - 15.6 (24G84). It should work for others as well. I've tried to make the absolute minimum of changes possible and all the changes are in individual commits. They are affecting only Darwin arm64, so all other platforms should have absolutely zero changes (unaffected). In other words, risk merging it is minimal: all changes are platform-isolated to ARM64 macOS. That said, this PR has Zero changes to target architecture (arm-vita-eabi), Zero changes to generated binaries for PS Vita; only affects the build host environment.

I will provide some instructions to help you review this quickly but also understand the changes:

Read commits in this logical order (not chronological), so you can understand the problem I faced:

VitaSDK toolchain fails to build on Apple Silicon (M1/M2/M3) Macs due to:

1. Autotools doesn't recognize aarch64-apple-darwin triple
2. GMP assembly code is x86-specific
3. Legacy zlib macros conflict with modern macOS headers
4. GCC configure scripts have ARM64 compatibility issues

After this PR: Developers can build VitaSDK natively on ARM64 Macs.

Autotools Support

1. 381d12a - "Fix ARM64 macOS support with conditional config file updates"

   • 📁 Creates update_config_files.sh script
   • 🎯 Review focus: Check platform detection logic is correct

2. 68d1fca - "Fix permission error in new config.{sub,guess}"

   • 🐛 Defensive programming (chmod before overwrite)

Library Fixes

3. 87c9446 - "fix(zlib): Remove legacy Mac fdopen workaround"

   • 🧹 Removes obsolete 1990s Metrowerks compiler code
   • 🎯 Review focus: Verify removed code is truly obsolete

4. 85ef304 - "Fix GMP compilation on Apple Silicon by disabling assembly"

   • 🎯 Review focus: Check conditional is Darwin AND arm64

5. 03cea05 - "Fix ARM64 macOS support for MPFR"

   • 🔧 Path correction (minor fix)

Toolchain Fixes

6. 50a3dc9 - "fix binutils patch fdopen conflict"

   • 📄 New patch: 0004-fix-zlib-fdopen-macos.patch
   • 🎯 Review focus: Verify patch only removes problematic fdopen macro

7. 6a13fa7 + c3b74e5 - "Fix GCC 10.3.0 build" + "Use patch; not script"

   • 📄 New patch: 0002-fix-macos-arm64.patch
   • 🎯 Review focus: Check patch addresses real compiler errors
   • 💡 Note: c3b74e5 refactors shell script → patch (improvement!)

8. f09b66d - "Fix gdb"

   • 📄 Two patches: zlib fdopen + clang enum warnings
   • 🎯 Review focus: Verify #pragma clang diagnostic is narrowly scoped

9. f48f0ab - "Reset libzip git repo before patching"

   • 🔄 Ensures idempotent rebuilds

---

What Each Component Does

🛠️ Scripts

File	Purpose	Platform Guard?
cmake/update_config_files.sh	Downloads latest autotools config files for ARM64 recognition	✅ Yes (Darwin + arm64)

🩹 Patches

File	Fixes	Applies To
patches/zlib.patch	Removes obsolete fdopen workaround	macOS (all architectures)
patches/binutils/0004-fix-zlib-fdopen-macos.patch	Same fdopen issue in binutils	macOS (all architectures)
patches/gcc/0002-fix-macos-arm64.patch	zlib fdopen + safe-ctype.h + config.host	macOS (all architectures)
patches/gdb-zlib-fdopen-macos.patch	Same fdopen issue in gdb	macOS (all architectures)
patches/gdb-enum-fix.patch	Suppress Clang enum warning	Clang only (scoped pragma)

⚙️ CMake Changes

All changes in CMakeLists.txt:

• Add patch commands (unconditional but idempotent)
• Add script invocations (platform-guarded inside scripts)
• Add GMP --disable-assembly flag (conditional: Darwin AND arm64)

---

How to test this

Just build it like this:

# On ARM64 Mac
cd buildscripts
mkdir build && cd build
cmake ..
make

# Expected: Successful build of complete toolchain
# Deliverable: Post build logs or success screenshot

Basic CI

Minimal: Check CI passes on existing platforms (Linux, Windows, x86_64 Mac)
Ideal: Request contributor confirm these commands succeed:

# After successful build
./build/vitasdk/bin/arm-vita-eabi-gcc --version  # Should show GCC 10.3.0
./build/vitasdk/bin/vita-elf-create --help       # Should work

---

The new commit here, is fixing the rest of the systems.
cdb0e19

Green CI: https://github.com/drpaneas/buildscripts/actions/runs/18910235182

[drpaneas]

Please review :)

[drpaneas]

Another successful CI run after the latest refactor to minify the changes
https://github.com/drpaneas/buildscripts/actions/runs/18959983797