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

CMakeLists.txt

@@ -18,6 +18,13 @@ message(STATUS "Build config: PLATFORM=${PLATFORM}, SDL_LINK_TYPE=${SDL_LINK_TYP
 # --- Resolve SDL ---
 include(cmake/SDLSetup.cmake)
 
+# --- Apply Linux dynamic RPATH globally so all targets can find libSDL3.so.0
+# at runtime. SDL_LINUX_RPATH is set by SDLSetup.cmake only on Linux + dynamic.
+if(DEFINED SDL_LINUX_RPATH)
+    message(STATUS "Setting CMAKE_BUILD_RPATH to: ${SDL_LINUX_RPATH}")
+    set(CMAKE_BUILD_RPATH "${SDL_LINUX_RPATH}")
+endif()
+
 # --- Subdirectories ---
 add_subdirectory(engine)
 add_subdirectory(game)

cmake/SDLSetup.cmake

@@ -30,7 +30,18 @@ if(SDL_LINK_TYPE STREQUAL "dynamic" AND WIN32)
     add_custom_target(copy_sdl_dll ALL
         COMMAND ${CMAKE_COMMAND} -E copy_if_different
             $<TARGET_FILE:SDL3::SDL3>
-            "${CMAKE_BINARY_DIR}/game"
+            "${CMAKE_BINARY_DIR}/game/$<TARGET_FILE_NAME:SDL3::SDL3>"
         COMMENT "Copying SDL3.dll to output directory"
     )
 endif()
+
+# On Linux with dynamic linking, embed the absolute path to the prebuilt lib
+# directory in the binary's RPATH. The prebuilt/linux directory is built
+# in-place on Linux by build_sdl_linux.sh and is never synced from Windows,
+# so the path is always valid on the remote machine.
+if(SDL_LINK_TYPE STREQUAL "dynamic" AND UNIX AND NOT APPLE)
+    get_target_property(SDL3_SO_LOCATION SDL3::SDL3 LOCATION)
+    get_filename_component(SDL3_LIB_DIR "${SDL3_SO_LOCATION}" DIRECTORY)
+    message(STATUS "SDL3 runtime library directory: ${SDL3_LIB_DIR}")
+    set(SDL_LINUX_RPATH "${SDL3_LIB_DIR}" CACHE INTERNAL "")
+endif()

prebuilt/linux/SDL3-dynamic/include/SDL3/SDL_revision.h

@@ -31,9 +31,9 @@
 /* #undef SDL_VENDOR_INFO */
 
 #ifdef SDL_VENDOR_INFO
-#define SDL_REVISION "SDL-3.5.0-release-3.4.0-501-gf3a3b4b95 (" SDL_VENDOR_INFO ")"
+#define SDL_REVISION "SDL-3.5.0-release-3.4.0-502-gf4255e15b (" SDL_VENDOR_INFO ")"
 #else
-#define SDL_REVISION "SDL-3.5.0-release-3.4.0-501-gf3a3b4b95"
+#define SDL_REVISION "SDL-3.5.0-release-3.4.0-502-gf4255e15b"
 #endif
 
 #endif /* SDL_revision_h_ */

prebuilt/linux/SDL3-dynamic/lib/libSDL3.so.0

@@ -1 +1 @@
-libSDL3.so.0.5.0
+libSDL3.so.0.5

prebuilt/linux/SDL3-dynamic/lib/libSDL3.so.0.5

@@ -0,0 +1 @@
+libSDL3.so.0.5.0

prebuilt/linux/SDL3-static/include/SDL3/SDL_revision.h

@@ -31,9 +31,9 @@
 /* #undef SDL_VENDOR_INFO */
 
 #ifdef SDL_VENDOR_INFO
-#define SDL_REVISION "SDL-3.5.0-release-3.4.0-501-gf3a3b4b95 (" SDL_VENDOR_INFO ")"
+#define SDL_REVISION "SDL-3.5.0-release-3.4.0-502-gf4255e15b (" SDL_VENDOR_INFO ")"
 #else
-#define SDL_REVISION "SDL-3.5.0-release-3.4.0-501-gf3a3b4b95"
+#define SDL_REVISION "SDL-3.5.0-release-3.4.0-502-gf4255e15b"
 #endif
 
 #endif /* SDL_revision_h_ */

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
@@ -51,3 +77,8 @@ sudo apt-get install -y --no-install-recommends \
 
 build_sdl "dynamic"
 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