Added:

- `build.steps` for pre-build generators (e.g., `moc`/`uic`/`rcc`)
- `build.pkg_config` for `pkg-config`-driven cflags/ldflags resolution
- `[toolchain]` support for `uic`, `moc`, `rcc`
- Step command variables (`{uic}`, `{moc}`, `{rcc}`, `{cflags}`, `{stem}`, `{in}`, `{out}`)
- `{profile}` placeholder support for dependency paths

src/core/builder/gas.rs

@@ -36,6 +36,9 @@ pub fn build(ctx: &BuildContext) -> Result<f64, String> {
         for obj in &objects {
             cmd.arg(obj);
         }
+        if std::env::var("DCR_DEBUG").is_ok() {
+            eprintln!("[dcr] {:?}", cmd);
+        }
         match cmd.status() {
             Ok(status) if status.success() => {
                 let elapsed = ((start_time.elapsed().as_secs_f64() * 100.0).trunc()) / 100.0;
@@ -73,6 +76,9 @@ pub fn build(ctx: &BuildContext) -> Result<f64, String> {
     };
     cmd.arg("-o").arg(out_path);
 
+    if std::env::var("DCR_DEBUG").is_ok() {
+        eprintln!("[dcr] {:?}", cmd);
+    }
     match cmd.status() {
         Ok(status) if status.success() => {
             let elapsed = ((start_time.elapsed().as_secs_f64() * 100.0).trunc()) / 100.0;