1 // RUN: %clang_cc1 %s -emit-pch -o %t1.pch -verify 2 // RUN: %clang_cc1 %s -emit-pch -o %t2.pch -include-pch %t1.pch -verify 3 // RUN: %clang_cc1 -fsyntax-only %s -include-pch %t2.pch -verify 4 5 // Test that a redefinition inside the PCH won't manifest as an ambiguous macro. 6 7 #ifndef HEADER1 8 #define HEADER1 9 10 #define M1 0 // expected-note {{previous}} 11 #define M1 1 // expected-warning {{redefined}} 12 13 #define M2 3 14 15 #elif !defined(HEADER2) 16 #define HEADER2 17 18 #define M2 4 // expected-warning {{redefined}} 19 // expected-note@-6 {{previous}} 20 21 #else 22 23 // Use the error to verify it was parsed. 24 int x = M1; // expected-note {{previous}} 25 int x = M2; // expected-error {{redefinition}} 26 27 #endif 28