llvm-project/clang/test/PCH/pragma-once.c
Sunil Srivastava fe58327146 Support '#pragma once' in headers when using PCH
The '#pragma once' directive was erroneously ignored when encountered
in the header-file specified in generate-PCH-mode. This resulted in
compile-time errors in some cases with legal code, and also a misleading
warning being produced.

Patch by Warren Ristow!

Differential Revision: http://reviews.llvm.org/D19815

llvm-svn: 276653
2016-07-25 17:17:06 +00:00

14 lines
438 B
C

// Test this without pch.
// RUN: %clang_cc1 -include %S/Inputs/pragma-once.h -fsyntax-only -verify %s
// Test with pch.
// RUN: %clang_cc1 -emit-pch -o %t %S/Inputs/pragma-once.h
// RUN: %clang_cc1 -include-pch %t -fsyntax-only -verify %s
// expected-no-diagnostics
// Including "pragma-once.h" twice, to verify the 'once' aspect is honored.
#include "Inputs/pragma-once.h"
#include "Inputs/pragma-once.h"
int foo(void) { return 0; }