specs: Bring sync script in line with target requirements

Fixup the remaining little bits so the sync-script generates the exact same targets we currently use. Signed-off-by: Rahix <[email protected]>
Rahix · Oct 9, 2020 · bad9277 · bad9277
1 parent 2afdb60
commit bad9277
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/avr-specs/sync-from-upstream.py b/avr-specs/sync-from-upstream.py
@@ -31,7 +31,10 @@
 }
 
 COMMON = {
+    # needed because we currently rely on avr-libc
     "no-default-libraries": False,
+    # 8-bit operations on AVR are atomic
+    "max-atomic-width": 8,
 }
 
 
@@ -61,6 +64,9 @@ def main():
 
     upstream_spec = json.loads(upstream_spec_string)
 
+    # our targets are of course not built into rustc
+    del upstream_spec["is-builtin"]
+
     for mcu, settings in SPECS.items():
         spec = copy.deepcopy(upstream_spec)
         spec.update(COMMON)