Make builds incremental by preserving source/build dirs (#45)

setup.sh

@@ -15,12 +15,12 @@ run_as_root() {
 }
 
 if [ "$(uname)" = "Darwin" ]; then
-  brew install nasm pkg-config
+  brew install nasm pkg-config ccache
 elif command -v dnf &>/dev/null; then
-  dnf install -y nasm cmake gcc-c++ pkgconfig git perl-IPC-Cmd
+  dnf install -y nasm cmake gcc-c++ pkgconfig git perl-IPC-Cmd ccache
 elif command -v apt-get &>/dev/null; then
   run_as_root apt-get update
-  run_as_root apt-get install -y nasm cmake g++ pkg-config curl
+  run_as_root apt-get install -y nasm cmake g++ pkg-config curl ccache
 fi
 
 if ! command -v uv &>/dev/null; then