arch/common/boot/grub2/genmoddep.awk

   1 #! /usr/bin/awk -f
   2 #
   3 # Copyright (C) 2006  Free Software Foundation, Inc.
   4 #
   5 # This genmoddep.awk is free software; the author
   6 # gives unlimited permission to copy and/or distribute it,
   7 # with or without modifications, as long as this notice is preserved.
   8 #
   9 # This program is distributed in the hope that it will be useful,
  10 # but WITHOUT ANY WARRANTY, to the extent permitted by law; without
  11 # even the implied warranty of MERCHANTABILITY or FITNESS FOR A
  12 # PARTICULAR PURPOSE.
  13
  14 # Read defined symbols from stdin.
  15 BEGIN {
  16   while (getline <"/dev/stdin") {
  17     symtab[$1] = $2
  18   }
  19 }
  20
  21 # The first line contains a module name.
  22 FNR == 1 {
  23   module = $1
  24   next
  25 };
  26
  27 # The rest is undefined symbols.
  28 {
  29   if ($1 in symtab) {
  30     modtab[module] = modtab[module] " " symtab[$1];
  31   }
  32   else {
  33     printf "%s in %s is not defined\n", $1, module >"/dev/stderr";
  34     error++;
  35     exit;
  36   }
  37 }
  38
  39 # Output the result.
  40 END {
  41   if (error == 1)
  42     exit 1;
  43
  44   for (mod in modtab) {
  45     # Remove duplications.
  46     split(modtab[mod], depmods, " ");
  47     for (depmod in uniqmods) {
  48       delete uniqmods[depmod];
  49     }
  50     for (i in depmods) {
  51       depmod = depmods[i];
  52       # Ignore kernel, as always loaded.
  53       if (depmod != "kernel")
  54         uniqmods[depmod] = 1;
  55     }
  56     modlist = ""
  57     for (depmod in uniqmods) {
  58       modlist = modlist " " depmod;
  59     }
  60     printf "%s:%s\n", mod, modlist;
  61   }
  62 }