add ARM64 Linux support, consolidate raylib to 5.5, build infrastructure

- Add pre-built raylib for linux-arm64. Makefile auto-detects
  aarch64 and links against the right lib.
- Consolidate all platforms to raylib 5.5 stable (was a mix of
  5.0, 5.6-dev, and 6.0-dev). Migrate DrawRectangleRoundedLines
  calls to DrawRectangleRoundedLinesEx to match the 5.5 API.
- Add scripts/raylib-build.sh with platform auto-detection and
  per-platform patch pipeline (patches/raylib/{all,linux,windows,
  macos}/). make raylib rebuilds for the current platform.
- Add Docker crossbuild (make raylib-crossbuild) to rebuild raylib
  for all platforms in one command.
- Add Linux ARM64 CI job using cyberjunk/gha-ubuntu-cross for
  multi-arch apt setup. All CI targets now build raylib from source.
- Update README to note ARM64 Linux support.

Author: sandrwich

.github/workflows/build.yml

@@ -28,6 +28,9 @@ jobs:
           sudo apt-get update
           sudo apt-get install -y gcc make libasound2-dev libx11-dev libxrandr-dev libxi-dev libgl1-mesa-dev libglu1-mesa-dev libxcursor-dev libxinerama-dev libwayland-dev libxkbcommon-dev libcurl4-openssl-dev
 
+      - name: Build raylib
+        run: make raylib
+
       - name: Compile and Bundle Linux
         run: make linux
 
@@ -38,6 +41,44 @@ jobs:
           path: dist/TLEscope-Linux-Portable/
           retention-days: 14
 
+  build-linux-arm64:
+    name: Build Linux ARM64
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout Repository
+        uses: actions/checkout@v4
+
+      - name: Setup ARM64 Cross-Compile
+        uses: cyberjunk/gha-ubuntu-cross@v5
+        with:
+          arch: arm64
+
+      - name: Install ARM64 Build Dependencies
+        run: |
+          sudo apt-get install -y gcc-aarch64-linux-gnu g++-aarch64-linux-gnu
+          sudo apt-get install -y -o Dpkg::Options::="--force-overwrite" \
+            libcurl4-openssl-dev:arm64 libgl-dev:arm64 libx11-dev:arm64 \
+            libxrandr-dev:arm64 libxi-dev:arm64 libxcursor-dev:arm64 \
+            libxinerama-dev:arm64 libwayland-dev:arm64 libxkbcommon-dev:arm64
+
+      - name: Build raylib for ARM64
+        run: ./scripts/raylib-build.sh linux-arm64
+
+      - name: Compile and Bundle Linux ARM64
+        run: |
+          make linux \
+            CC_LINUX=aarch64-linux-gnu-gcc \
+            LIB_LIN_PATH="-Ilib/raylib_lin_arm64/include -Llib/raylib_lin_arm64/lib" \
+            LDFLAGS_LIN="-Ilib/raylib_lin_arm64/include -Llib/raylib_lin_arm64/lib -lraylib -lcurl -lGL -lm -lpthread -ldl -lrt -lX11" \
+            DIST_LINUX=dist/TLEscope-Linux-arm64-Portable
+
+      - name: Upload Linux ARM64 Artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: TLEscope-Linux-arm64-Portable
+          path: dist/TLEscope-Linux-arm64-Portable/
+          retention-days: 14
+
   build-windows:
     name: Build Windows
     runs-on: windows-latest
@@ -55,6 +96,7 @@ jobs:
           update: true
           install: >-
             make
+            git
             mingw-w64-x86_64-gcc
             mingw-w64-x86_64-curl
             mingw-w64-x86_64-ngtcp2
@@ -66,6 +108,9 @@ jobs:
             mingw-w64-x86_64-nsis
             mingw-w64-x86_64-imagemagick
 
+      - name: Build raylib
+        run: make raylib
+
       - name: Compile and Bundle Windows
         run: make win-installer MINGW_PREFIX=/mingw64 PKG_CONFIG_WIN=pkg-config
 
@@ -99,6 +144,8 @@ jobs:
           msystem: CLANGARM64
           update: true
           install: >-
+            make
+            git
             mingw-w64-clang-aarch64-make
             mingw-w64-clang-aarch64-clang
             mingw-w64-clang-aarch64-curl
@@ -109,6 +156,9 @@ jobs:
             mingw-w64-clang-aarch64-openssl
             mingw-w64-clang-aarch64-pkgconf
 
+      - name: Build raylib
+        run: make raylib
+
       - name: Compile and Bundle Windows ARM64
         run: mingw32-make windows-arm64
 
@@ -121,7 +171,7 @@ jobs:
 
   release:
     name: Publish Release
-    needs: [build-linux, build-windows, build-windows-arm64]
+    needs: [build-linux, build-linux-arm64, build-windows, build-windows-arm64]
     if: github.event_name == 'push' && (github.ref == 'refs/heads/main' || github.ref == 'refs/heads/master' || startsWith(github.ref, 'refs/tags/v'))
     runs-on: ubuntu-latest
     permissions:
@@ -141,8 +191,10 @@ jobs:
           cd artifacts
           # The Makefile bundles into subdirectories, so we zip those folders
           chmod +x TLEscope-Linux-Portable/TLEscope
-          
+          chmod +x TLEscope-Linux-arm64-Portable/TLEscope
+
           zip -r ../TLEscope-Linux-Portable.zip TLEscope-Linux-Portable/
+          zip -r ../TLEscope-Linux-arm64-Portable.zip TLEscope-Linux-arm64-Portable/
           zip -r ../TLEscope-Win-Portable.zip TLEscope-Win-Portable/
           zip -r ../TLEscope-Win-arm64-Portable.zip TLEscope-Win-arm64-Portable/
           
@@ -179,6 +231,7 @@ jobs:
           prerelease: true
           files: |
             TLEscope-Linux-Portable.zip
+            TLEscope-Linux-arm64-Portable.zip
             TLEscope-Win-Portable.zip
             TLEscope-Win-arm64-Portable.zip
             TLEscope-Installer.exe
@@ -190,6 +243,7 @@ jobs:
           generate_release_notes: true
           files: |
             TLEscope-Linux-Portable.zip
+            TLEscope-Linux-arm64-Portable.zip
             TLEscope-Win-Portable.zip
             TLEscope-Win-arm64-Portable.zip
             TLEscope-Installer.exe

Makefile

@@ -17,7 +17,12 @@ else
 	LIB_WIN_PATH = -Ilib/raylib_win/include -Llib/raylib_win/lib -I$(MINGW_PREFIX)/include -L$(MINGW_PREFIX)/lib
 endif
 
+UNAME_M := $(shell uname -m)
+ifeq ($(UNAME_M),aarch64)
+LIB_LIN_PATH = -Ilib/raylib_lin_arm64/include -Llib/raylib_lin_arm64/lib
+else
 LIB_LIN_PATH = -Ilib/raylib_lin/include -Llib/raylib_lin/lib
+endif
 
 SRC       = src/main.c src/astro.c src/config.c src/ui.c
 OBJ       = $(SRC:src/%.c=build/%.o)
@@ -40,7 +45,7 @@ RAYLIB_LIBS = $(shell pkg-config --libs raylib 2>/dev/null)
 LDFLAGS_MACOS = $(RAYLIB_LIBS) -lcurl -framework IOKit -framework Cocoa -framework OpenGL
 DIST_MACOS = dist/TLEscope-macOS-Portable
 
-.PHONY: all linux macos windows windows-arm64 win-installer clean build bin install uninstall
+.PHONY: all linux macos windows windows-arm64 win-installer clean build bin install uninstall raylib raylib-crossbuild
 
 all: linux
 
@@ -117,6 +122,16 @@ build:
 bin:
 	mkdir -p bin
 
+raylib:
+	./scripts/raylib-build.sh
+
+raylib-%:
+	./scripts/raylib-build.sh $*
+
+raylib-crossbuild:
+	docker build -f scripts/raylib-crossbuild.Dockerfile -t tlescope-crossbuild .
+	docker run --rm -v "$(PWD)/lib:/build/lib" tlescope-crossbuild
+
 clean:
 	rm -rf build bin dist
 

README.md

@@ -33,7 +33,7 @@ TLEscope comes equipped with tools designed for RF engineers, satellite operator
 
 - **Minimal Footprint and High Performance**: Developed in pure C utilizing the Raylib framework, TLEscope maintains a minimal footprint. The application provides high-performance rendering that is likely more efficient than your standard system file browser, even with hundreds or thousands of satellites on-screen.
 
-- **​Native OS Support**: Built for Linux, macOS, and Windows.
+- **​Native OS Support**: Built for Linux (x86_64 and ARM64), macOS, and Windows.
 
 ### ​**Design Philosophy**
 ​Most existing orbital tracking software suffers from dated, unintuitive interfaces. TLEscope bridges this gap by prioritizing both visual clarity and ease of use.

lib/raygui.h

@@ -4967,11 +4967,7 @@ static void GuiDrawRectangle(Rectangle rec, int borderWidth, Color borderColor,
     if (borderWidth > 0)
     {
         // Draw rectangle border lines with color
-#if (defined(_WIN32) || defined(_WIN64)) && !defined(_M_ARM64)
-        DrawRectangleRoundedLines(rec, roundness, segments, (float)borderWidth, GuiFade(borderColor, guiAlpha));
-#else
-        DrawRectangleRoundedLines(rec, roundness, segments, GuiFade(borderColor, guiAlpha));
-#endif
+        DrawRectangleRoundedLinesEx(rec, roundness, segments, (float)borderWidth, GuiFade(borderColor, guiAlpha));
     }
 
 #if defined(RAYGUI_DEBUG_RECS_BOUNDS)