clang/test/Sema/attr-weak.c

   1 // RUN: %clang_cc1 -verify -fsyntax-only %s
   2
   3 extern int f0(void) __attribute__((weak));
   4 extern int g0 __attribute__((weak));
   5 extern int g1 __attribute__((weak_import));
   6 int f2(void) __attribute__((weak));
   7 int g2 __attribute__((weak));
   8 int g3 __attribute__((weak_import)); // expected-warning {{'weak_import' attribute cannot be specified on a definition}}
   9 int __attribute__((weak_import)) g4(void);
  10 void __attribute__((weak_import)) g5(void) {
  11 }
  12
  13 struct __attribute__((weak)) s0 {}; // expected-warning {{'weak' attribute only applies to variables, functions, and classes}}
  14 struct __attribute__((weak_import)) s1 {}; // expected-warning {{'weak_import' attribute only applies to variables and functions}}
  15
  16 static int f(void) __attribute__((weak)); // expected-error {{weak declaration cannot have internal linkage}}
  17 static int x __attribute__((weak)); // expected-error {{weak declaration cannot have internal linkage}}
  18
  19 // rdar://9538608
  20 int C; // expected-note {{previous declaration is here}}
  21 extern int C __attribute__((weak_import)); // expected-warning {{an already-declared variable is made a weak_import declaration}}
  22
  23 static int pr14946_x;
  24 extern int pr14946_x  __attribute__((weak)); // expected-error {{weak declaration cannot have internal linkage}}
  25
  26 static void pr14946_f(void);
  27 void pr14946_f(void) __attribute__((weak)); // expected-error {{weak declaration cannot have internal linkage}}