bin/includebloat.awk

   1 #!/usr/bin/gawk -f
   2 # -*- tab-width: 4; indent-tabs-mode: t -*-
   3 #
   4 # This file is part of the LibreOffice project.
   5 #
   6 # This Source Code Form is subject to the terms of the Mozilla Public
   7 # License, v. 2.0. If a copy of the MPL was not distributed with this
   8 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
   9 #
  10
  11 # Generate a list of files included by the C++ compiler during the build
  12 # sorted by the total bytes an included file contributed to preprocessor input.
  13 # usage: first do a full build with "make check", then run this from $BUILDDIR
  14
  15 # NOTE: by default gbuild does not generate dependencies for system headers
  16 #    (in particular the C++ standard library), so those will NOT be counted
  17
  18 BEGIN {
  19     cmd = "find workdir/Dep/CxxObject/ -name *.d | xargs cat"
  20     while ((cmd | getline) > 0) {
  21         if ($0 ~ /^ .*\\$/) {
  22             gsub(/^ /, "");
  23             gsub(/ *\\$/, "");
  24             includes[$1]++
  25             if ($2) {
  26                 # GCC emits 2 per line if short enough!
  27                 includes[$2]++
  28             }
  29         }
  30     }
  31     exit
  32 }
  33
  34 END {
  35     for (inc in includes) {
  36         cmd = "wc -c " inc
  37         if ((cmd | getline) < 0)
  38             print "ERROR on: " cmd
  39         sizes[inc] = $1 # $0 is wc -c output, $1 is size
  40         totals[inc] = $1 * includes[inc]
  41         totalsize += totals[inc]
  42         close(cmd)
  43     }
  44     PROCINFO["sorted_in"] = "@val_num_desc"
  45     print "sum total bytes included (excluding system headers): " totalsize
  46     for (inc in totals) {
  47         print totals[inc], sizes[inc], includes[inc], inc
  48     }
  49 }
  50
  51 # vim: set noet sw=4 ts=4: