llvm-project

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