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

   #!/bin/sh
   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

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.