(command.CommandList
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    (C {<process_arguments>} {(DQ ($ Id.VSub_At '$@'))})
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        (assign_pair
          lhs: (sh_lhs_expr.Name name:build_dir)
          op: assign_op.Equal
          rhs: {(DQ ($ Id.VSub_DollarName '$LLVM_TOP') </build.llvm>)}
          spids: [34]
        )
      ]
    )
    (command.If
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        (if_arm
          cond: [
            (command.Sentence
              child: (C {<test>} {<Id.KW_Bang '!'>} {<-d>} {(DQ ($ Id.VSub_DollarName '$build_dir'))})
              terminator: <Id.Op_Semi _>
            )
          ]
          action: [(C {<mkdir>} {<-p>} {(DQ ($ Id.VSub_DollarName '$build_dir'))})]
          spids: [40 54]
        )
      ]
    )
    (command.ShAssignment
      pairs: [
        (assign_pair
          lhs: (sh_lhs_expr.Name name:config_status)
          op: assign_op.Equal
          rhs: {(DQ ($ Id.VSub_DollarName '$build_dir') </config.status>)}
          spids: [74]
        )
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    (command.If
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              child: 
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                  {<-o>} {(DQ ($ Id.VSub_DollarName '$config_status'))} {<-ot>} {(DQ ($ Id.VSub_Number '$0'))}
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              terminator: <Id.Op_Semi _>
            )
          ]
          action: [
            (command.ShAssignment
              pairs: [
                (assign_pair
                  lhs: (sh_lhs_expr.Name name:config_options)
                  op: assign_op.Equal
                  rhs: 
                    {
                      (DQ <'--prefix='> ($ Id.VSub_DollarName '$PREFIX') <' --with-llvmgccdir='> 
                        ($ Id.VSub_DollarName '$PREFIX')
                      )
                    }
                  spids: [113]
                )
              ]
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            (command.If
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                (if_arm
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                    (command.Sentence
                      child: (C {<test>} {(DQ ($ Id.VSub_DollarName '$OPTIMIZED'))} {<-eq>} {<1>})
                      terminator: <Id.Op_Semi _>
                    )
                  ]
                  action: [
                    (command.ShAssignment
                      pairs: [
                        (assign_pair
                          lhs: (sh_lhs_expr.Name name:config_options)
                          op: assign_op.Equal
                          rhs: {(DQ ($ Id.VSub_DollarName '$config_options') <' --enable-optimized'>)}
                          spids: [139]
                        )
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                    )
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                  spids: [122 136]
                )
              ]
              else_action: [
                (command.ShAssignment
                  pairs: [
                    (assign_pair
                      lhs: (sh_lhs_expr.Name name:config_options)
                      op: assign_op.Equal
                      rhs: {(DQ ($ Id.VSub_DollarName '$config_options') <' --disable-optimized'>)}
                      spids: [149]
                    )
                  ]
                )
              ]
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            (command.If
              arms: [
                (if_arm
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                    (command.Sentence
                      child: (C {<test>} {(DQ ($ Id.VSub_DollarName '$DEBUG'))} {<-eq>} {<1>})
                      terminator: <Id.Op_Semi _>
                    )
                  ]
                  action: [
                    (command.ShAssignment
                      pairs: [
                        (assign_pair
                          lhs: (sh_lhs_expr.Name name:config_options)
                          op: assign_op.Equal
                          rhs: {(DQ ($ Id.VSub_DollarName '$config_options') <' --enable-debug'>)}
                          spids: [176]
                        )
                      ]
                    )
                  ]
                  spids: [159 173]
                )
              ]
              else_action: [
                (command.ShAssignment
                  pairs: [
                    (assign_pair
                      lhs: (sh_lhs_expr.Name name:config_options)
                      op: assign_op.Equal
                      rhs: {(DQ ($ Id.VSub_DollarName '$config_options') <' --disable-debug'>)}
                      spids: [186]
                    )
                  ]
                )
              ]
            )
            (command.If
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                (if_arm
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                    (command.Sentence
                      child: (C {<test>} {(DQ ($ Id.VSub_DollarName '$ASSERTIONS'))} {<-eq>} {<1>})
                      terminator: <Id.Op_Semi _>
                    )
                  ]
                  action: [
                    (command.ShAssignment
                      pairs: [
                        (assign_pair
                          lhs: (sh_lhs_expr.Name name:config_options)
                          op: assign_op.Equal
                          rhs: {(DQ ($ Id.VSub_DollarName '$config_options') <' --enable-assertions'>)}
                          spids: [213]
                        )
                      ]
                    )
                  ]
                  spids: [196 210]
                )
              ]
              else_action: [
                (command.ShAssignment
                  pairs: [
                    (assign_pair
                      lhs: (sh_lhs_expr.Name name:config_options)
                      op: assign_op.Equal
                      rhs: {(DQ ($ Id.VSub_DollarName '$config_options') <' --disable-assertions'>)}
                      spids: [223]
                    )
                  ]
                )
              ]
            )
            (command.If
              arms: [
                (if_arm
                  cond: [
                    (command.Sentence
                      child: (C {<test>} {(DQ ($ Id.VSub_DollarName '$CHECKING'))} {<-eq>} {<1>})
                      terminator: <Id.Op_Semi _>
                    )
                  ]
                  action: [
                    (command.ShAssignment
                      pairs: [
                        (assign_pair
                          lhs: (sh_lhs_expr.Name name:config_options)
                          op: assign_op.Equal
                          rhs: 
                            {
                              (DQ ($ Id.VSub_DollarName '$config_options') 
                                <' --enable-expensive-checks'>
                              )
                            }
                          spids: [250]
                        )
                      ]
                    )
                  ]
                  spids: [233 247]
                )
              ]
              else_action: [
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                  pairs: [
                    (assign_pair
                      lhs: (sh_lhs_expr.Name name:config_options)
                      op: assign_op.Equal
                      rhs: 
                        {
                          (DQ ($ Id.VSub_DollarName '$config_options') <' --disable-expensive-checks'>)
                        }
                      spids: [260]
                    )
                  ]
                )
              ]
            )
            (command.If
              arms: [
                (if_arm
                  cond: [
                    (command.Sentence
                      child: (C {<test>} {(DQ ($ Id.VSub_DollarName '$DOXYGEN'))} {<-eq>} {<1>})
                      terminator: <Id.Op_Semi _>
                    )
                  ]
                  action: [
                    (command.ShAssignment
                      pairs: [
                        (assign_pair
                          lhs: (sh_lhs_expr.Name name:config_options)
                          op: assign_op.Equal
                          rhs: {(DQ ($ Id.VSub_DollarName '$config_options') <' --enable-doxygen'>)}
                          spids: [287]
                        )
                      ]
                    )
                  ]
                  spids: [270 284]
                )
              ]
              else_action: [
                (command.ShAssignment
                  pairs: [
                    (assign_pair
                      lhs: (sh_lhs_expr.Name name:config_options)
                      op: assign_op.Equal
                      rhs: {(DQ ($ Id.VSub_DollarName '$config_options') <' --disable-doxygen'>)}
                      spids: [297]
                    )
                  ]
                )
              ]
            )
            (command.If
              arms: [
                (if_arm
                  cond: [
                    (command.Sentence
                      child: (C {<test>} {(DQ ($ Id.VSub_DollarName '$THREADS'))} {<-eq>} {<1>})
                      terminator: <Id.Op_Semi _>
                    )
                  ]
                  action: [
                    (command.ShAssignment
                      pairs: [
                        (assign_pair
                          lhs: (sh_lhs_expr.Name name:config_options)
                          op: assign_op.Equal
                          rhs: {(DQ ($ Id.VSub_DollarName '$config_options') <' --enable-threads'>)}
                          spids: [324]
                        )
                      ]
                    )
                  ]
                  spids: [307 321]
                )
              ]
              else_action: [
                (command.ShAssignment
                  pairs: [
                    (assign_pair
                      lhs: (sh_lhs_expr.Name name:config_options)
                      op: assign_op.Equal
                      rhs: {(DQ ($ Id.VSub_DollarName '$config_options') <' --disable-threads'>)}
                      spids: [334]
                    )
                  ]
                )
              ]
            )
            (command.ShAssignment
              pairs: [
                (assign_pair
                  lhs: (sh_lhs_expr.Name name:config_options)
                  op: assign_op.Equal
                  rhs: 
                    {
                      (DQ ($ Id.VSub_DollarName '$config_options') <' '> 
                        ($ Id.VSub_DollarName '$OPTIONS_DASH') <' '> ($ Id.VSub_DollarName '$OPTIONS_DASH_DASH')
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                    }
                  spids: [344]
                )
              ]
            )
            (command.ShAssignment
              pairs: [
                (assign_pair
                  lhs: (sh_lhs_expr.Name name:src_dir)
                  op: assign_op.Equal
                  rhs: 
                    {
                      (command_sub
                        left_token: <Id.Left_Backtick '`'>
                        command_list: (command.CommandList children:[(C {<pwd>})])
                      )
                    }
                  spids: [354]
                )
              ]
            )
            (C {<cd>} {(DQ ($ Id.VSub_DollarName '$build_dir'))})
            (C {<msg>} {<0>} {<Configuring>} {($ Id.VSub_DollarName '$module')} 
              {<with> <Id.Lit_Other ':'>}
            )
            (C {<msg>} {<0>} {(DQ <'  '> ($ Id.VSub_DollarName '$src_dir') </configure>)} 
              {($ Id.VSub_DollarName '$config_options')}
            )
            (command.AndOr
              ops: [Id.Op_DPipe]
              children: [
                (C {($ Id.VSub_DollarName '$src_dir') </configure>} 
                  {($ Id.VSub_DollarName '$config_options')}
                )
                (C {<die>} {($ Id.VSub_QMark '$?')} 
                  {(DQ <'Configuring '> ($ Id.VSub_DollarName '$module') <' module failed'>)}
                )
              ]
            )
          ]
          spids: [80 106]
        )
      ]
      else_action: [
        (C {<msg>} {<0>} {<Module>} {($ Id.VSub_DollarName '$module')} {<already>} 
          {<configured> <Id.Lit_Comma ','>} {<ignoring>} {<configure>} {<options.>}
        )
        (C {<cd>} {(DQ ($ Id.VSub_DollarName '$build_dir'))})
      ]
    )
    (C {<msg>} {<0>} {<Building>} {($ Id.VSub_DollarName '$module')} {<with> <Id.Lit_Other ':'>})
    (C {<msg>} {<0>} {(DQ <'  make'>)} {($ Id.VSub_DollarName '$OPTIONS_ASSIGN')} {<tools-only>})
    (C {<make>} {($ Id.VSub_DollarName '$OPTIONS_ASSIGN')} {<tools-only>})
  ]
)