clang/test/PCH/macro-redef.c

   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