scripts/gen_build_files.sh

   1 #!/bin/sh
   2
   3 test $# -ge 2 || { echo "Syntax: $0 SRCTREE OBJTREE"; exit 1; }
   4
   5 # cd to objtree
   6 cd -- "$2" || { echo "Syntax: $0 SRCTREE OBJTREE"; exit 1; }
   7
   8 srctree="$1"
   9
  10 find -type d | while read -r d; do
  11         src="$srctree/$d/Kbuild.src"
  12         dst="$d/Kbuild"
  13         if test -f "$src"; then
  14                 echo "  CHK     $dst"
  15
  16                 s=`sed -n 's@^//kbuild:@@p' -- "$srctree/$d"/*.c`
  17                 echo "# DO NOT EDIT. This file is generated from Kbuild.src" >"$dst.$$.tmp"
  18
  19                 # Why "IFS='' read -r REPLY"??
  20                 # This atrocity is needed to read lines without mangling.
  21                 # IFS='' prevents whitespace trimming,
  22                 # -r suppresses backslash handling.
  23                 while IFS='' read -r REPLY; do
  24                         test x"$REPLY" = x"INSERT" && REPLY="$s"
  25                         printf "%s\n" "$REPLY"
  26                 done <"$src" >>"$dst.$$.tmp"
  27
  28                 if test -f "$dst" && cmp -s "$dst.$$.tmp" "$dst"; then
  29                         rm -- "$dst.$$.tmp"
  30                 else
  31                         echo "  GEN     $dst"
  32                         mv -- "$dst.$$.tmp" "$dst"
  33                 fi
  34         fi
  35
  36         src="$srctree/$d/Config.src"
  37         dst="$d/Config.in"
  38         if test -f "$src"; then
  39                 echo "  CHK     $dst"
  40
  41                 s=`sed -n 's@^//config:@@p' -- "$srctree/$d"/*.c`
  42                 echo "# DO NOT EDIT. This file is generated from Config.src" >"$dst.$$.tmp"
  43
  44                 while IFS='' read -r REPLY; do
  45                         test x"$REPLY" = x"INSERT" && REPLY="$s"
  46                         printf "%s\n" "$REPLY"
  47                 done <"$src" >>"$dst.$$.tmp"
  48
  49                 if test -f "$dst" && cmp -s "$dst.$$.tmp" "$dst"; then
  50                         rm -- "$dst.$$.tmp"
  51                 else
  52                         echo "  GEN     $dst"
  53                         mv -- "$dst.$$.tmp" "$dst"
  54                 fi
  55         fi
  56 done
  57
  58 # Last read failed. This is normal. Don't exit with its error code:
  59 exit 0