[libc++] Reject abilist if it contains an ABI tag (#139030)
We currently don't have any ABI tags in our dylib symbols, and this is
unlikely to change in the future. By diagnosing this we avoid
accidentally adding one through e.g. having `_LIBCPP_HIDE_FROM_ABI` on
an exported symbol.
diff --git a/libcxx/utils/sym_diff.py b/libcxx/utils/sym_diff.py
index 8eaf8b7..8d2ff14 100755
--- a/libcxx/utils/sym_diff.py
+++ b/libcxx/utils/sym_diff.py
@@ -80,6 +80,11 @@
old_syms_list, _ = util.filter_stdlib_symbols(old_syms_list)
new_syms_list, _ = util.filter_stdlib_symbols(new_syms_list)
+ for symbol in new_syms_list:
+ if symbol["is_defined"] and 'B' in symbol["name"]:
+ print(f"Symbol {symbol['name']} contains an ABI tag!")
+ sys.exit(1)
+
added, removed, changed = diff.diff(old_syms_list, new_syms_list)
if args.removed_only:
added = {}
