TOMOYO Linux Cross Reference
Linux/arch/x86/um/vdso/checkundef.sh

   #!/bin/sh
   # SPDX-License-Identifier: GPL-2.0
   nm="$1"
   file="$2"
   $nm "$file" | grep '^ *U' > /dev/null 2>&1
   if [ $? -eq 1 ]; then
       exit 0
   else
       echo "$file: undefined symbols found" >&2
      exit 1
  fi

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