[PATCH] c: support attribs starting with '_'

[Martin Liška]

        PR c/107156

gcc/ChangeLog:

        * attribs.h (lookup_attribute_by_prefix): Support attributes
        starting with underscore (like _noreturn, or __Noreturn).
---
 gcc/attribs.h | 2 --
 1 file changed, 2 deletions(-)

diff --git a/gcc/attribs.h b/gcc/attribs.h
index b2836560fc2..706d35e63d8 100644
--- a/gcc/attribs.h
+++ b/gcc/attribs.h
@@ -274,8 +274,6 @@ lookup_attribute_by_prefix (const char *attr_name, tree 
list)
            }
 
          const char *p = IDENTIFIER_POINTER (name);
-         gcc_checking_assert (attr_len == 0 || p[0] != '_');
-
          if (strncmp (attr_name, p, attr_len) == 0)
            break;
 
-- 
2.37.3