diff options
Diffstat (limited to 'libcpp/macro.c')
| -rw-r--r-- | libcpp/macro.c | 25 |
1 files changed, 12 insertions, 13 deletions
diff --git a/libcpp/macro.c b/libcpp/macro.c index a1ba137..8445ce3 100644 --- a/libcpp/macro.c +++ b/libcpp/macro.c @@ -2699,13 +2699,12 @@ warn_of_redefinition (cpp_reader *pfile, cpp_hashnode *node, if (node->flags & NODE_WARN) return true; - /* Suppress warnings for builtins that lack the NODE_WARN flag. */ - if (node->flags & NODE_BUILTIN) - { - if (!pfile->cb.user_builtin_macro - || !pfile->cb.user_builtin_macro (pfile, node)) - return false; - } + /* Suppress warnings for builtins that lack the NODE_WARN flag, + unless Wbuiltin-macro-redefined. */ + if (node->flags & NODE_BUILTIN + && (!pfile->cb.user_builtin_macro + || !pfile->cb.user_builtin_macro (pfile, node))) + return CPP_OPTION (pfile, warn_builtin_macro_redefined); /* Redefinitions of conditional (context-sensitive) macros, on the other hand, must be allowed silently. */ @@ -3181,14 +3180,14 @@ _cpp_create_definition (cpp_reader *pfile, cpp_hashnode *node) if (warn_of_redefinition (pfile, node, macro)) { - const int reason = (node->flags & NODE_BUILTIN) + const int reason = ((node->flags & NODE_BUILTIN) + && !(node->flags & NODE_WARN)) ? CPP_W_BUILTIN_MACRO_REDEFINED : CPP_W_NONE; - bool warned; - warned = cpp_pedwarning_with_line (pfile, reason, - pfile->directive_line, 0, - "\"%s\" redefined", - NODE_NAME (node)); + bool warned = + cpp_pedwarning_with_line (pfile, reason, + pfile->directive_line, 0, + "\"%s\" redefined", NODE_NAME (node)); if (warned && node->type == NT_MACRO && !(node->flags & NODE_BUILTIN)) cpp_error_with_line (pfile, CPP_DL_NOTE, |