# Generate an ELF symbol version map a-la Solaris and GNU ld.
+# Copyright (C) 2007, 2008 Free Software Foundation, Inc.
# Contributed by Richard Henderson <rth@cygnus.com>
#
-# This file is part of GNU CC.
+# This file is part of GCC.
#
-# GNU CC 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 version.
+# 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 3, or (at your option) any later
+# version.
#
-# GNU CC is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
+# GCC is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
+# License for more details.
#
# You should have received a copy of the GNU General Public License
-# along with GNU CC; 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.
}
state == "nm" && NF == 3 {
- def[$3] = 1;
+ split ($3, s, "@")
+ def[s[1]] = 1;
+ sawsymbol = 1;
next;
}
# Now we process a simplified variant of the Solaris symbol version
# script. We have one symbol per line, no semicolons, simple markers
# for beginning and ending each section, and %inherit markers for
-# describing version inheritence. A symbol may appear in more than
+# describing version inheritance. 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;
}
NF == 2 && $2 == "{" {
- libs[$1] = 1;
+ if ($1 != "%exclude")
+ libs[$1] = 1;
thislib = $1;
next;
}
}
{
- ver[$1] = thislib;
+ sym = prefix $1;
+ symbols[sym] = 1
+ if (thislib != "%exclude")
+ ver[sym, thislib] = 1;
+ else {
+ for (l in libs)
+ ver[sym, l] = 0;
+ }
next;
}
END {
+ if (!sawsymbol)
+ {
+ print "No symbols seen -- broken or mis-installed nm?" | "cat 1>&2";
+ exit 1;
+ }
for (l in libs)
output(l);
}
if (inherit[lib])
output(inherit[lib]);
- printf("%s {\n", lib);
- printf(" global:\n");
- for (sym in ver)
- if ((ver[sym] == lib) && (sym in def))
- printf("\t%s;\n", sym);
-
- if (inherit[lib])
+ empty=1
+ for (sym in symbols)
+ if ((ver[sym, lib] != 0) && (sym in def))
+ {
+ if (empty)
+ {
+ printf("%s {\n", lib);
+ printf(" global:\n");
+ empty = 0;
+ }
+ printf("\t%s;\n", sym);
+ }
+
+ if (empty)
+ {
+ for (l in libs)
+ if (inherit[l] == lib)
+ inherit[l] = inherit[lib];
+ }
+ else if (inherit[lib])
printf("} %s;\n", inherit[lib]);
else
printf ("\n local:\n\t*;\n};\n");