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// Test user-facing command line options to generate C++20 header units.
// RUN: %clang -### -std=c++20 -fmodule-header=user foo.hh 2>&1 | \
// RUN: FileCheck -check-prefix=CHECK-USER %s
// RUN: %clang -### -std=c++20 -fmodule-header=user foo.h 2>&1 | \
// RUN: FileCheck -check-prefix=CHECK-USER1 %s
// RUN: %clang -### -std=c++20 -fmodule-header=system foo.hh 2>&1 | \
// RUN: FileCheck -check-prefix=CHECK-SYS1 %s
// RUN: %clang -### -std=c++20 -fmodule-header=system \
// RUN: -xc++-system-header vector 2>&1 | FileCheck -check-prefix=CHECK-SYS2 %s
// RUN: %clang -### -std=c++20 -fmodule-header=system \
// RUN: -xc++-header vector 2>&1 | FileCheck -check-prefix=CHECK-SYS2 %s
// RUN: %clang -### -std=c++20 -fmodule-header %/S/Inputs/header-unit-01.hh \
// RUN: 2>&1 | FileCheck -check-prefix=CHECK-ABS %s -DTDIR=%/S/Inputs
// CHECK-USER: "-emit-header-unit"
// CHECK-USER-SAME: "-o" "foo.pcm"
// CHECK-USER-SAME: "-x" "c++-user-header" "foo.hh"
// CHECK-USER1: "-emit-header-unit"
// CHECK-USER1-SAME: "-o" "foo.pcm"
// CHECK-USER1-SAME: "-x" "c++-user-header" "foo.h"
// CHECK-SYS1: "-emit-header-unit"
// CHECK-SYS1-SAME: "-o" "foo.pcm"
// CHECK-SYS1-SAME: "-x" "c++-system-header" "foo.hh"
// CHECK-SYS2: "-emit-header-unit"
// CHECK-SYS2-SAME: "-o" "vector.pcm"
// CHECK-SYS2-SAME: "-x" "c++-system-header" "vector"
// CHECK-ABS: "-emit-header-unit"
// CHECK-ABS-SAME: "-o" "header-unit-01.pcm"
// CHECK-ABS-SAME: "-x" "c++-header-unit-header" "[[TDIR]]/header-unit-01.hh"
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