llvm-project/clang/test/Frontend/warning-mapping-5.c

// Check that #pragma diagnostic warning overrides -Werror.
//
// RUN: %clang_cc1 -verify -Werror %s

#pragma clang diagnostic warning "-Wsign-compare"
int f0(int x, unsigned y) {
  return x < y; // expected-warning {{comparison of integers}}
}
Fix the behavior of clang's -w flag. It is intended to disable _all_ warnings, even those upgraded to errors via `-Werror=warningname` or `#pragma clang diagnostic error' Fixes: https://llvm.org/PR38231 Differential Revision: https://reviews.llvm.org/D53199 llvm-svn: 352535 2019-01-30 03:33:48 +08:00			`// Check that #pragma diagnostic warning overrides -Werror.`
			`//`
Basic/Diagnostics: Apparently, #pragma ... diagnostic is intended to override the command line options (at least according to GCC's documentation). GCC 4.2 didn't appear to actually do this, but it seems like that has been fixed in later release, so we will follow the docs. llvm-svn: 141119 2011-10-05 05:17:24 +08:00			`// RUN: %clang_cc1 -verify -Werror %s`

			`#pragma clang diagnostic warning "-Wsign-compare"`
			`int f0(int x, unsigned y) {`
			`return x < y; // expected-warning {{comparison of integers}}`
			`}`