llvm-project/clang/test/Preprocessor/ignore-pragmas.c

// RUN: %clang_cc1 -E %s -Wall -ffreestanding -verify
// RUN: %clang_cc1 -Eonly %s -Wall -ffreestanding -verify
// RUN: %clang -M -Wall -ffreestanding %s -Xclang -verify
// RUN: %clang -E -frewrite-includes %s -Wall -ffreestanding -Xclang -verify
// RUN: %clang -E -dD -dM %s -Wall -ffreestanding -Xclang -verify
// expected-no-diagnostics

#pragma GCC visibility push (default)
#pragma weak
#pragma this_pragma_does_not_exist
For Linux/gnu compatibility, preinclude <stdc-predef.h> if the file is available As reported in llvm bugzilla 32377. Here’s a patch to add preinclude of stdc-predef.h. The gcc documentation says “On GNU/Linux, <stdc-predef.h> is pre-included.” See https://gcc.gnu.org/gcc-4.8/porting_to.html; The preinclude is inhibited with –ffreestanding. Basically I fixed the failing test cases by adding –ffreestanding which inhibits this behavior. I fixed all the failing tests, including some in extra/test, there's a separate patch for that which is linked here Patch By: mibintc Differential Revision: https://reviews.llvm.org/D34158 llvm-svn: 318669 2017-11-21 01:57:42 +08:00			`// RUN: %clang_cc1 -E %s -Wall -ffreestanding -verify`
			`// RUN: %clang_cc1 -Eonly %s -Wall -ffreestanding -verify`
			`// RUN: %clang -M -Wall -ffreestanding %s -Xclang -verify`
			`// RUN: %clang -E -frewrite-includes %s -Wall -ffreestanding -Xclang -verify`
			`// RUN: %clang -E -dD -dM %s -Wall -ffreestanding -Xclang -verify`
do not warn about unknown pragmas in modes that do not handle them (pr9537) And refactor to have just one place in code that sets up the empty pragma handlers. llvm-svn: 207758 2014-05-01 20:54:03 +08:00			`// expected-no-diagnostics`

			`#pragma GCC visibility push (default)`
			`#pragma weak`
			`#pragma this_pragma_does_not_exist`