# Prior to C23, the C standard restricts enum values to the range of `int`;
# relaxing this is a GNU extension that Clang follows. On LLVM-profile systems,
# though, this appears to not be enabled by default, causing Clang to complain
# that `1 << 63` is not a compile-time expression (since it overflows an `int`
# and can't be computed at compile-time). This can be suppressed by causing the
# enum to be interpreted explicitly as containing `unsigned long long` values
# instead.

--- a/indexstore-db/include/CIndexStoreDB/CIndexStoreDB.h
+++ b/indexstore-db/include/CIndexStoreDB/CIndexStoreDB.h
@@ -82,7 +82,7 @@ typedef enum {
   INDEXSTOREDB_SYMBOL_ROLE_REL_IBTYPEOF    = 1 << 17,
   INDEXSTOREDB_SYMBOL_ROLE_REL_SPECIALIZATIONOF = 1 << 18,

-  INDEXSTOREDB_SYMBOL_ROLE_CANONICAL = 1 << 63,
+  INDEXSTOREDB_SYMBOL_ROLE_CANONICAL = 1ULL << 63,
 } indexstoredb_symbol_role_t;

 typedef enum {