python: Add type hints and fix style in rules scripts

For maximum compatibility, we use the uppercase types from the
typing package instead of the built-in types, therefore compliant
with PEP 484 and PEP 526.

1 files changed, 1 insertions, 1 deletions

diff --git a/CC/prebuilt/read_pkgconfig.py b/CC/prebuilt/read_pkgconfig.py
index 7530e6c..115c305 100755
--- a/CC/prebuilt/read_pkgconfig.py
+++ b/CC/prebuilt/read_pkgconfig.py
@@ -54,7 +54,7 @@ def read_ldflags(pkg: str, args: List[str], env: Dict[str, str]) -> str:
     return " ".join([f for f in link_flags if not is_local(f)])
 
 
-def read_pkgconfig():
+def read_pkgconfig() -> None:
     if len(sys.argv) < 3:
         print(f"usage: read_pkgconfig OUT_NAME PC_FILE [PC_ARGS...]")
         exit(1)