scripts/versions.awk

   1 # Combine version map fragments into version scripts for our shared objects.
   2 # Copyright (C) 1998,99,2000,02 Free Software Foundation, Inc.
   3 # Written by Ulrich Drepper <drepper@cygnus.com>, 1998.
   4
   5 # This script expects the following variables to be defined:
   6 # defsfile              name of Versions.def file
   7 # buildroot             name of build directory with trailing slash
   8 # move_if_change        move-if-change command
   9
  10 # Read definitions for the versions.
  11 BEGIN {
  12   nlibs=0;
  13   while (getline < defsfile) {
  14     if (/^[a-zA-Z0-9_.]+ \{/) {
  15       libs[$1] = 1;
  16       curlib = $1;
  17       while (getline < defsfile && ! /^}/) {
  18       if ($2 == "=") {
  19           renamed[curlib "::" $1] = $3;
  20       }
  21         else
  22           versions[$1] = 1;
  23       }
  24     }
  25   }
  26   close(defsfile);
  27
  28   tmpfile = buildroot "Versions.tmp";
  29   sort = "sort -n > " tmpfile;
  30 }
  31
  32 # Remove comment lines.
  33 /^ *#/ {
  34   next;
  35 }
  36
  37 # This matches the beginning of the version information for a new library.
  38 /^[a-zA-Z0-9_.]+/ {
  39   actlib = $1;
  40   if (!libs[$1]) {
  41     printf("no versions defined for %s\n", $1) > "/dev/stderr";
  42     exit 1;
  43   }
  44   next;
  45 }
  46
  47 # This matches the beginning of a new version for the current library.
  48 /^  [A-Za-z_]/ {
  49   if (renamed[actlib "::" $1])
  50     actver = renamed[actlib "::" $1];
  51   else if (!versions[$1]) {
  52     printf("version %s not defined for %s\n", $1, actlib) > "/dev/stderr";
  53     exit 1;
  54   }
  55   else
  56     actver = $1;
  57   next;
  58 }
  59
  60 # This matches lines with names to be added to the current version in the
  61 # current library.  This is the only place where we print something to
  62 # the intermediate file.
  63 /^   / {
  64   sortver=actver
  65   # Ensure GLIBC_ versions come always first
  66   sub(/^GLIBC_/," GLIBC_",sortver)
  67   printf("%s %s %s\n", actlib, sortver, $0) | sort;
  68 }
  69
  70
  71 function closeversion(name, oldname) {
  72   if (firstinfile) {
  73     printf("  local:\n    *;\n") > outfile;
  74     firstinfile = 0;
  75   }
  76   # This version inherits from the last one only if they
  77   # have the same nonnumeric prefix, i.e. GLIBC_x.y and GLIBC_x.z
  78   # or FOO_x and FOO_y but not GLIBC_x and FOO_y.
  79   pfx = oldname;
  80   sub(/[0-9.]+/,".+",pfx);
  81   if (oldname == "" || name !~ pfx) print "};" > outfile;
  82   else printf("} %s;\n", oldname) > outfile;
  83 }
  84
  85 function close_and_move(name, real_name) {
  86   close(name);
  87   system(move_if_change " " name " " real_name " >&2");
  88 }
  89
  90 # Now print the accumulated information.
  91 END {
  92   close(sort);
  93   oldlib = "";
  94   oldver = "";
  95   printf("version-maps =");
  96   while (getline < tmpfile) {
  97     if ($1 != oldlib) {
  98       if (oldlib != "") {
  99         closeversion(oldver, veryoldver);
 100         oldver = "";
 101         close_and_move(outfile, real_outfile);
 102       }
 103       oldlib = $1;
 104       real_outfile = buildroot oldlib ".map";
 105       outfile = real_outfile "T";
 106       firstinfile = 1;
 107       veryoldver = "";
 108       printf(" %s.map", oldlib);
 109     }
 110     if ($2 != oldver) {
 111       if (oldver != "") {
 112         closeversion(oldver, veryoldver);
 113         veryoldver = oldver;
 114       }
 115       printf("%s {\n  global:\n", $2) > outfile;
 116       oldver = $2;
 117     }
 118     printf("   ") > outfile;
 119     for (n = 3; n <= NF; ++n) {
 120       printf(" %s", $n) > outfile;
 121     }
 122     printf("\n") > outfile;
 123   }
 124   printf("\n");
 125   closeversion(oldver, veryoldver);
 126   close_and_move(outfile, real_outfile);
 127   system("rm -f " tmpfile);
 128 }