clang/test/Driver/implicit-function-as-error.c

   1 // RUN: %clang -target x86_64-apple-darwin -mios-simulator-version-min=7 -fsyntax-only %s -Xclang -verify
   2 // RUN: %clang -target x86_64-apple-darwin -arch arm64 -target x86_64-apple-darwin -mios-version-min=7 -fsyntax-only %s -Xclang -verify
   3 // RUN: %clang -target armv7k-apple-watchos -arch armv7k -target armv7k-apple-watchos -fsyntax-only %s -Xclang -verify
   4
   5 // For 64-bit iOS, automatically promote -Wimplicit-function-declaration
   6 // to an error.
   7
   8 void radar_10894044(void) {
   9   printf("Hi\n"); // expected-error {{call to undeclared library function 'printf' with type 'int (const char *, ...)'}} expected-note {{include the header <stdio.h> or explicitly provide a declaration for 'printf'}}
  10   radar_10894044_not_declared(); // expected-error {{call to undeclared function 'radar_10894044_not_declared'; ISO C99 and later do not support implicit function declarations}}
  11 }