all variants (windows/linux)(static/dynamic) now work

scripts/build_sdl_linux.sh

@@ -39,6 +39,32 @@ build_sdl() {
     echo "=== Done: $OUT_DIR ==="
 }
 
+create_dynamic_symlinks() {
+    local LIB_DIR="$PREBUILT_DIR/SDL3-dynamic/lib"
+
+    local REAL_FILE
+    REAL_FILE="$(find "$LIB_DIR" -maxdepth 1 -name 'libSDL3.so.*.*' | head -1)"
+
+    if [ -z "$REAL_FILE" ]; then
+        echo "ERROR: No versioned libSDL3.so file found in $LIB_DIR" >&2
+        exit 1
+    fi
+
+    local REAL_NAME
+    REAL_NAME="$(basename "$REAL_FILE")"
+    local SONAME="${REAL_NAME%.*}"
+
+    echo ""
+    echo "=== Creating SDL3 symlinks in $LIB_DIR ==="
+    echo "  $SONAME -> $REAL_NAME"
+    echo "  libSDL3.so -> $SONAME"
+
+    ln -sf "$REAL_NAME" "$LIB_DIR/$SONAME"
+    ln -sf "$SONAME"    "$LIB_DIR/libSDL3.so"
+
+    echo "=== Done ==="
+}
+
 # Install build dependencies if needed (Debian 12 bookworm)
 echo "Checking build dependencies..."
 sudo apt-get update -qq
@@ -50,4 +76,9 @@ sudo apt-get install -y --no-install-recommends \
     libgl1-mesa-dev
 
 build_sdl "dynamic"
-build_sdl "static"
+build_sdl "static"
+
+# Always recreate symlinks regardless of whether the build was a no-op.
+# cmake --install does not preserve symlinks and Ninja may skip the build
+# entirely if sources are unchanged, leaving the lib directory without them.
+create_dynamic_symlinks