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// Test -D and -U interaction with a PCH when -fms-extensions is enabled.
// RUN: %clang_cc1 -DFOO %S/variables.h -emit-pch -o %t1.pch
// RUN: not %clang_cc1 -DFOO=blah -DBAR=int -include-pch %t1.pch -pch-through-header=%S/variables.h %s 2> %t.err
// RUN: FileCheck -check-prefix=CHECK-FOO %s < %t.err
// RUN: not %clang_cc1 -UFOO -DBAR=int -include-pch %t1.pch %s -pch-through-header=%S/variables.h 2> %t.err
// RUN: FileCheck -check-prefix=CHECK-NOFOO %s < %t.err
// RUN: %clang_cc1 -include-pch %t1.pch -DBAR=int -pch-through-header=%S/variables.h -verify %s
// Enabling MS extensions should allow us to add BAR definitions.
// RUN: %clang_cc1 -DMSEXT -fms-extensions -DFOO %S/variables.h -emit-pch -o %t1.pch
// RUN: %clang_cc1 -DMSEXT -fms-extensions -include-pch %t1.pch -DBAR=int -pch-through-header=%S/variables.h -verify %s
#include "variables.h"
BAR bar = 17;
#ifndef MSEXT
// expected-error@-2 {{unknown type name 'BAR'}}
#endif
#ifndef FOO
# error FOO was not defined
#endif
#if FOO != 1
# error FOO has the wrong definition
#endif
#if defined(MSEXT) && !defined(BAR)
# error BAR was not defined
#endif
// CHECK-FOO: definition of macro 'FOO' differs between the precompiled header ('1') and the command line ('blah')
// CHECK-NOFOO: macro 'FOO' was defined in the precompiled header but undef'd on the command line
// expected-warning@1 {{definition of macro 'BAR' does not match definition in precompiled header}}
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