scripts/versionlist.awk

   1 # Extract ordered list of version sets from Versions files.
   2 # Copyright (C) 2014-2021 Free Software Foundation, Inc.
   3
   4 BEGIN { in_lib = ""; in_version = 0 }
   5
   6 !in_lib && NF == 2 && $2 == "{" {
   7   in_lib = $1;
   8   all_libs[in_lib] = 1;
   9   next
  10 }
  11 !in_lib { next }
  12
  13 NF == 2 && $2 == "{" {
  14   in_version = 1;
  15   lib_versions[in_lib, $1] = 1;
  16   # Partition the version sets into GLIBC_* and others.
  17   if ($1 ~ /GLIBC_/) {
  18     libs[in_lib] = libs[in_lib] "  " $1 "\n";
  19     all_versions[$1] = 1;
  20   }
  21   else {
  22     others_libs[in_lib] = others_libs[in_lib] "  " $1 "\n";
  23     others_all_versions[$1] = 1;
  24   }
  25   next
  26 }
  27
  28 in_version && $1 == "}" { in_version = 0; next }
  29 in_version { next }
  30
  31 $1 == "}" { in_lib = ""; next }
  32
  33 END {
  34   nlibs = asorti(all_libs, libs_order);
  35   for (i = 1; i <= nlibs; ++i) {
  36     lib = libs_order[i];
  37
  38     for (v in all_versions) {
  39       if (!((lib, v) in lib_versions)) {
  40         libs[lib] = libs[lib] "  " v "\n";
  41       }
  42     }
  43
  44     for (v in others_all_versions) {
  45       if (!((lib, v) in lib_versions)) {
  46         others_libs[lib] = others_libs[lib] "  " v "\n";
  47       }
  48     }
  49
  50     print lib, "{";
  51
  52     # Sort and print all the GLIBC_* sets first, then all the others.
  53     # This is not really generically right, but it suffices
  54     # for the cases we have so far.  e.g. GCC_3.0 is "later than"
  55     # all GLIBC_* sets that matter for purposes of Versions files.
  56
  57     sort = "sort -u -t. -k 1,1 -k 2n,2n -k 3";
  58     printf "%s", libs[lib] | sort;
  59     close(sort);
  60
  61     sort = "sort -u -t. -k 1,1 -k 2n,2n -k 3";
  62     printf "%s", others_libs[lib] | sort;
  63     close(sort);
  64
  65     print "}";
  66   }
  67 }