compile all tests before running them, so the outputs are grouped

tasks.py

@@ -214,6 +214,7 @@ def synth(c, target):
 
 @task
 def test(c, target):
+    to_run = []
     for target in expand_test_target(target):
         out_info, out_sim, out_bsc = ensure_build_dirs(target, "info", "sim", "bsc")
         libdirs = bluespec_libdirs(target, "sim")
@@ -226,8 +227,11 @@ def test(c, target):
         testdata_tgt = testdata_tgt.relative_to(out_sim, walk_up=True)
         testdata.unlink(missing_ok=True)
         testdata.symlink_to(testdata_tgt, target_is_directory=True)
-        with c.cd(out_sim):
-            c.run(f"./TB -V {target.stem}.vcd")
+        to_run.append((out_sim, f"./TB -V {target.stem}.vcd"))
+    for d, cmd in to_run:
+        print("")
+        with c.cd(d):
+            c.run(cmd)
 
 @task
 def clean(c):