build: apply optimization flags to existing build trees and escape Exec path

scripts/build.sh

@@ -14,7 +14,7 @@ python3 scripts/prepare.py
 # is required by objc4's debug-ness macro check.
 cmake -S build/darling-src -B build/darling-src/build -G 'Unix Makefiles' \
   -DCMAKE_BUILD_TYPE= -DTARGET_i386=OFF -DCMAKE_INSTALL_PREFIX=/usr/local -DENABLE_METAL=ON \
-  -DCMAKE_C_FLAGS_INIT="-O3 -march=native -mtune=native -pipe" \
-  -DCMAKE_CXX_FLAGS_INIT="-O3 -march=native -mtune=native -pipe"
+  -DCMAKE_C_FLAGS="-O3 -march=native -mtune=native -pipe" \
+  -DCMAKE_CXX_FLAGS="-O3 -march=native -mtune=native -pipe"
 cmake --build build/darling-src/build --parallel "${JOBS:-$(nproc)}"
 echo 'Build complete. Install the base runtime with: sudo cmake --install build/darling-src/build'

tools/riot-desktop-entry.py

@@ -141,13 +141,14 @@ def main():
 
     # 3. Create .desktop file
     run_script = PROJECT_ROOT / "scripts/run.sh"
+    exec_path = str(run_script).replace("%", "%%")
     desktop_content = f"""[Desktop Entry]
 Version=1.0
 Type=Application
 Name=League of Legends
 GenericName=MOBA Game
 Comment=Play League of Legends on Linux with darling-lol
-Exec="{run_script}"
+Exec="{exec_path}"
 Path={PROJECT_ROOT}
 Icon=league-of-legends
 Terminal=false