clang/test/SemaCXX/weak-init.cpp

   1 // RUN: %clang_cc1 %s -verify -fsyntax-only
   2
   3 extern const int W1 __attribute__((weak)) = 10; // expected-note {{declared here}}
   4
   5 static_assert(W1 == 10, ""); // expected-error   {{static assertion expression is not an integral constant expression}}
   6                              // expected-note@-1 {{initializer of weak variable 'W1' is not considered constant because it may be different at runtime}}
   7
   8 extern const int W2 __attribute__((weak)) = 20;
   9
  10 int S2[W2]; // expected-error {{variable length array declaration not allowed at file scope}}
  11
  12 extern const int W3 __attribute__((weak)) = 30; // expected-note {{declared here}}
  13
  14 constexpr int S3 = W3; // expected-error   {{constexpr variable 'S3' must be initialized by a constant expression}}
  15                        // expected-note@-1 {{initializer of weak variable 'W3' is not considered constant because it may be different at runtime}}