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