1 // RUN: %clang_cc1 -fsyntax-only -verify=gnu -std=gnu17 %s 2 // RUN: %clang_cc1 -fsyntax-only -verify=gnu -std=gnu2x %s 3 // RUN: %clang_cc1 -fsyntax-only -verify=std -std=c17 %s 4 // RUN: %clang_cc1 -fsyntax-only -verify=std -std=c2x %s 5 6 // std-no-diagnostics 7 8 // 'index' is a builtin library function, but only in GNU mode. So this should 9 // give an error in GNU modes but be okay in non-GNU mode. 10 // FIXME: the error is correct, but these notes are pretty awful. 11 int index; // gnu-error {{redefinition of 'index' as different kind of symbol}} \ 12 gnu-note {{unguarded header; consider using #ifdef guards or #pragma once}} \ 13 gnu-note {{previous definition is here}} 14