scripts/versions.awk

   1 # Combine version map fragments into version scripts for our shared objects.
   2 # Copyright (C) 1998,99,2000,2002,2005 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   lossage = 0;
  13
  14   nlibs=0;
  15   while (getline < defsfile) {
  16     if (/^[a-zA-Z0-9_.]+ \{/) {
  17       libs[$1] = 1;
  18       curlib = $1;
  19       while (getline < defsfile && ! /^}/) {
  20         if ($2 == "=") {
  21           renamed[curlib "::" $1] = $3;
  22         }
  23         else
  24           versions[curlib "::" $1] = 1;
  25       }
  26     }
  27   }
  28   close(defsfile);
  29
  30   tmpfile = buildroot "Versions.tmp";
  31   # Note this sorting presumes only single digits between dots for proper
  32   # numeric ordering.  sort -n doesn't do quite the right thing either,
  33   # and in some non-GNU sort implementations does not sort at all.
  34   sort = "sort > " tmpfile;
  35 }
  36
  37 # Remove comment lines.
  38 /^ *#/ {
  39   next;
  40 }
  41
  42 # This matches the beginning of the version information for a new library.
  43 /^[a-zA-Z0-9_.]+/ {
  44   actlib = $1;
  45   if (!libs[$1]) {
  46     printf("no versions defined for %s\n", $1) > "/dev/stderr";
  47     ++lossage;
  48   }
  49   next;
  50 }
  51
  52 # This matches the beginning of a new version for the current library.
  53 /^  [A-Za-z_]/ {
  54   if (renamed[actlib "::" $1])
  55     actver = renamed[actlib "::" $1];
  56   else if (!versions[actlib "::" $1] && $1 != "GLIBC_PRIVATE") {
  57     printf("version %s not defined for %s\n", $1, actlib) > "/dev/stderr";
  58     ++lossage;
  59   }
  60   else
  61     actver = $1;
  62   next;
  63 }
  64
  65 # This matches lines with names to be added to the current version in the
  66 # current library.  This is the only place where we print something to
  67 # the intermediate file.
  68 /^   / {
  69   sortver=actver
  70   # Ensure GLIBC_ versions come always first
  71   sub(/^GLIBC_/," GLIBC_",sortver)
  72   printf("%s %s %s\n", actlib, sortver, $0) | sort;
  73 }
  74
  75
  76 function closeversion(name, oldname) {
  77   if (firstinfile) {
  78     printf("  local:\n    *;\n") > outfile;
  79     firstinfile = 0;
  80   }
  81   # This version inherits from the last one only if they
  82   # have the same nonnumeric prefix, i.e. GLIBC_x.y and GLIBC_x.z
  83   # or FOO_x and FOO_y but not GLIBC_x and FOO_y.
  84   pfx = oldname;
  85   sub(/[0-9.]+/,".+",pfx);
  86   if (oldname == "" || name !~ pfx) print "};" > outfile;
  87   else printf("} %s;\n", oldname) > outfile;
  88 }
  89
  90 function close_and_move(name, real_name) {
  91   close(name);
  92   system(move_if_change " " name " " real_name " >&2");
  93 }
  94
  95 # Now print the accumulated information.
  96 END {
  97   close(sort);
  98
  99   if (lossage) {
 100     system("rm -f " tmpfile);
 101     exit 1;
 102   }
 103
 104   oldlib = "";
 105   oldver = "";
 106   printf("version-maps =");
 107   while (getline < tmpfile) {
 108     if ($1 != oldlib) {
 109       if (oldlib != "") {
 110         closeversion(oldver, veryoldver);
 111         oldver = "";
 112         close_and_move(outfile, real_outfile);
 113       }
 114       oldlib = $1;
 115       real_outfile = buildroot oldlib ".map";
 116       outfile = real_outfile "T";
 117       firstinfile = 1;
 118       veryoldver = "";
 119       printf(" %s.map", oldlib);
 120     }
 121     if ($2 != oldver) {
 122       if (oldver != "") {
 123         closeversion(oldver, veryoldver);
 124         veryoldver = oldver;
 125       }
 126       printf("%s {\n  global:\n", $2) > outfile;
 127       oldver = $2;
 128     }
 129     printf("   ") > outfile;
 130     for (n = 3; n <= NF; ++n) {
 131       printf(" %s", $n) > outfile;
 132     }
 133     printf("\n") > outfile;
 134   }
 135   printf("\n");
 136   closeversion(oldver, veryoldver);
 137   close_and_move(outfile, real_outfile);
 138   system("rm -f " tmpfile);
 139 }