text: // RUN: %clang -### -std=c++20 -xc++-user-header foo.h 2>&1 | \
  // RUN:   FileCheck -check-prefix=CHECK-USER %s
  
  // RUN: %clang -### -std=c++20 -xc++-system-header vector 2>&1 | \
  // RUN:   FileCheck -check-prefix=CHECK-SYSTEM %s
  
  // RUN: %clang -### -std=c++20 \
  // RUN:   -xc++-header-unit-header %/S/Inputs/header-unit-01.hh 2>&1 | \
  // RUN:   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.h"
  // CHECK-SYSTEM: "-emit-header-unit"
  // CHECK-SYSTEM-SAME: "-o" "vector.pcm"
  // CHECK-SYSTEM-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"
  