Added:

- `build.kind = "efi"` — UEFI PE32+ executable support. Links with `-shared -nostdlib -Wl,-dll -Wl,--subsystem,10`, output via `efi_path()` with `.efi` extension, rejected by `dcr run`.
- `build.kind = "elf"` — bare-metal ELF executable support. Uses `elf_path()` output path, rejected by `dcr run`, no extra linker flags.

Fixed:

- `dcr run` with `--target` or `build.target` now correctly finds the binary in the arch-specific target directory.
- `dcr run` checks profile-specific `build.{profile}.kind` before rejecting library builds (previously only checked `build.kind`).
- `dcr clean` now reads `build.target` from `dcr.toml` when no `--target` flag is given.
- Linux: target directory is now consistent — `target/<arch>-unknown-linux-gnu/<profile>/` (no stale `target/<profile>/`).
- `dcr.lock` is now populated with all resolved dependencies (registry, path, git) instead of being always empty.
- Git dependencies are now properly recognized and recorded in `dcr.lock`.
- `is_registry_dep` correctly identifies version-based registry dependency tables (`{ version = "..." }`) and rejects tables with unknown keys.
- `dcr test` accepts `--debug`/`--release` flags (defaults to `debug` profile instead of always `release`).
- Build fingerprint cache (`build_cache_path`) now includes `target_dir` — different targets no longer share a single cache entry.
- `object_path` no longer hardcodes the `src/` prefix — works correctly with custom `build.roots` (e.g. `roots = ["lib"]`).
- `dcr update` now generates `.exe` candidates for all Windows targets, not just `x86_64-pc-windows-msvc`.
- Compiler existence is verified before starting the build (clear error if compiler is not found in PATH).
- Consolidated duplicate `OUTPUT_MUTEX` definitions — MSVC backend now uses the shared mutex from `common.rs`.
- Registry cache root directory is created if missing (prevents cryptic errors when `~/.dcr/` does not exist).

src/cli/test.rs

@@ -16,10 +16,11 @@ const BOLD_BLUE: &str = "\x1b[1m\x1b[94m";
 
 pub fn test(args: &[String]) -> i32 {
     let mut init_header = false;
+    let mut profile = "debug";
     for arg in args {
         if arg == "--help" {
             println!("USAGE:");
-            println!("    dcr test [--init]");
+            println!("    dcr test [--init] [--debug | --release]");
             println!();
             println!("ALIASES:");
             println!("    dcr tests");
@@ -29,12 +30,18 @@ pub fn test(args: &[String]) -> i32 {
             println!();
             println!("OPTIONS:");
             println!("    --init            Create tests/dcr_test.h in current project");
+            println!("    --debug           Build and run tests with debug profile (default)");
+            println!("    --release         Build and run tests with release profile");
             return 0;
         }
         if arg == "--init" {
             init_header = true;
             continue;
         }
+        if arg == "--debug" || arg == "--release" {
+            profile = arg.trim_start_matches("--");
+            continue;
+        }
         error("Unknown argument");
         return 1;
     }
@@ -68,7 +75,7 @@ pub fn test(args: &[String]) -> i32 {
         }
     }
 
-    match with_dir(&root, run_testsuite) {
+    match with_dir(&root, || run_testsuite(profile)) {
         Ok(code) => code,
         Err(msg) => {
             error(&msg);
@@ -77,13 +84,12 @@ pub fn test(args: &[String]) -> i32 {
     }
 }
 
-fn run_testsuite() -> Result<i32, String> {
-    if build::build(&[String::from("--release")]) != 0 {
+fn run_testsuite(profile: &str) -> Result<i32, String> {
+    if build::build(&[format!("--{profile}")]) != 0 {
         return Ok(1);
     }
 
     let config = Config::open("./dcr.toml").map_err(|_| "Failed to read dcr.toml".to_string())?;
-    let profile = "release";
     let name = get_config_str(&config, "package.name");
     let language = get_language_with_profile(&config, profile)?;
     let compiler_cfg = get_string_with_profile(&config, "compiler", profile);