PR target/29978

[pf3gnuchains/gcc-fork.git] / gcc / mkmap-symver.awk

diff --git a/gcc/mkmap-symver.awk b/gcc/mkmap-symver.awk
index 7953afc..7d9ed43 100644 (file)
--- a/gcc/mkmap-symver.awk
+++ b/gcc/mkmap-symver.awk
@@ -1,11 +1,12 @@
 # Generate an ELF symbol version map a-la Solaris and GNU ld.
+#      Copyright (C) 2007  Free Software Foundation, Inc.
 #      Contributed by Richard Henderson <rth@cygnus.com>
 #
 # This file is part of GCC.
 #
 # GCC is free software; you can redistribute it and/or modify it under
 # the terms of the GNU General Public License as published by the Free
-# Software Foundation; either version 2, or (at your option) any later
+# Software Foundation; either version 3, or (at your option) any later
 # version.
 #
 # GCC is distributed in the hope that it will be useful, but WITHOUT
@@ -14,13 +15,16 @@
 # License for more details.
 #
 # You should have received a copy of the GNU General Public License
-# along with GCC; see the file COPYING.  If not, write to the Free
-# Software Foundation, 59 Temple Place - Suite 330, Boston MA
-# 02111-1307, USA.
+# along with GCC; see the file COPYING3.  If not see
+# <http://www.gnu.org/licenses/>.
 
 BEGIN {
   state = "nm";
   sawsymbol = 0;
+  if (leading_underscore)
+    prefix = "_";
+  else
+    prefix = "";
 }
 
 # Remove comment and blank lines.
@@ -56,6 +60,8 @@ state == "nm" {
 # for beginning and ending each section, and %inherit markers for
 # describing version inheritence.  A symbol may appear in more than
 # one symbol version, and the last seen takes effect.
+# The magic version name '%exclude' causes all the symbols given that
+# version to be dropped from the output (unless a later version overrides).
 
 NF == 3 && $1 == "%inherit" {
   inherit[$2] = $3;
@@ -63,7 +69,8 @@ NF == 3 && $1 == "%inherit" {
 }
 
 NF == 2 && $2 == "{" {
-  libs[$1] = 1;
+  if ($1 != "%exclude")
+    libs[$1] = 1;
   thislib = $1;
   next;
 }
@@ -74,7 +81,11 @@ $1 == "}" {
 }
 
 {
-  ver[$1] = thislib;
+  sym = prefix $1;
+  if (thislib != "%exclude")
+    ver[sym] = thislib;
+  else
+    delete ver[sym];
   next;
 }
 
@@ -106,8 +117,6 @@ function output(lib) {
            empty = 0;
          }
        printf("\t%s;\n", sym);
-       if (dotsyms)
-         printf("\t.%s;\n", sym);
       }
 
   if (empty)