1 files changed, 117 insertions, 0 deletions
diff --git a/scripts/versions.awk b/scripts/versions.awk
new file mode 100644
index 0000000000..d6571fd039
--- /dev/null
+++ b/scripts/versions.awk
@@ -0,0 +1,117 @@
+# Combine version map fragments into version files for the generated
+# shared object.
+# (C) Copyright 1998 Free Software Foundation, Inc.
+# Written by Ulrich Drepper <drepper@cygnus.com>, 1998.
+
+# This script expects the following variables to be defined:
+# defsfile		name of Versions.def file
+# buildroot		name of build directory with trailing slash
+# move_if_change	move-if-change command
+
+# Read definitions for the versions.
+BEGIN {
+  nlibs=0;
+  while (getline < defsfile) {
+    if (/^[a-zA-Z_]+ {/) {
+      libs[$1] = 1;
+      curlib = $1;
+      while (getline < defsfile && ! /^}/) {
+	versions[$1] = 1;
+	if (NF > 1) {
+	  derived[curlib, $1] = " " $2;
+	  for (n = 3; n <= NF; ++n) {
+	    derived[curlib, $1] = derived[curlib, $1] ", " $n;
+	  }
+	}
+      }
+    }
+  }
+  close(defsfile);
+
+  tmpfile = buildroot "Versions.tmp";
+  sort = "sort -n > " tmpfile;
+}
+
+# Remove comment lines.
+/^ *#/ {
+  next;
+}
+
+# This matches the beginning of the version information for a new library.
+/^[a-zA-Z_]+/ {
+  actlib = $1;
+  if (!libs[$1]) {
+    printf("no versions defined for %s\n", $1) > "/dev/stderr";
+    exit 1;
+  }
+  next;
+}
+
+# This matches the beginning of a new version for the current library.
+/^  [A-Za-z_]/ {
+  actver = $1;
+  if (!versions[$1]) {
+    printf("version %s not defined\n", $1) > "/dev/stderr";
+    exit 1;
+  }
+  next;
+}
+
+# This matches lines with names to be added to the current version in the
+# current library.  This is the only place where we print something to
+# the intermediate file.
+/^   / {
+  printf("%s %s %s\n", actlib, actver, $0) | sort;
+}
+
+
+function closeversion(name) {
+  if (firstinfile) {
+    printf("  local:\n    *;\n") > outfile;
+    firstinfile = 0;
+  }
+  printf("}%s;\n", derived[oldlib, name]) > outfile;
+}
+
+function close_and_move(name, real_name) {
+  close(name);
+  system(move_if_change " " name " " real_name " >&2");
+}
+
+# Now print the accumulated information.
+END {
+  close(sort);
+  oldlib = "";
+  oldver = "";
+  printf("version-maps =");
+  while(getline < tmpfile) {
+    if ($1 != oldlib) {
+      if (oldlib != "") {
+	closeversion(oldver);
+	oldver = "";
+	close_and_move(outfile, real_outfile);
+      }
+      oldlib = $1;
+      real_outfile = buildroot oldlib ".map";
+      outfile = real_outfile "T";
+      firstinfile = 1;
+      printf(" %s.map", oldlib);
+    }
+    if ($2 != oldver) {
+      if (oldver != "") {
+	closeversion(oldver);
+      }
+      printf("%s {\n  global:\n", $2) > outfile;
+      oldver = $2;
+    }
+    printf("   ") > outfile;
+    for (n = 3; n <= NF; ++n) {
+      printf(" %s", $n) > outfile;
+    }
+    printf("\n") > outfile;
+  }
+  printf("\n");
+  closeversion(oldver);
+  close_and_move(outfile, real_outfile);
+  system("rm -f " tmpfile);
+}