1# Generate a flat list of symbols to export. 2# Copyright (C) 2007-2014 Free Software Foundation, Inc. 3# Contributed by Richard Henderson <rth@cygnus.com> 4# 5# This file is part of GCC. 6# 7# GCC is free software; you can redistribute it and/or modify it under 8# the terms of the GNU General Public License as published by the Free 9# Software Foundation; either version 3, or (at your option) any later 10# version. 11# 12# GCC is distributed in the hope that it will be useful, but WITHOUT 13# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 14# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public 15# License for more details. 16# 17# You should have received a copy of the GNU General Public License 18# along with GCC; see the file COPYING3. If not see 19# <http://www.gnu.org/licenses/>. 20 21# Options: 22# "-v leading_underscore=1" : Symbols in map need leading underscore. 23# "-v pe_dll=1" : Create .DEF file for Windows PECOFF 24# DLL link instead of map file. 25 26BEGIN { 27 state = "nm"; 28 excluding = 0; 29 if (leading_underscore) 30 prefix = "_"; 31 else 32 prefix = ""; 33} 34 35# Remove comment and blank lines. 36/^ *#/ || /^ *$/ { 37 next; 38} 39 40# We begin with nm input. Collect the set of symbols that are present 41# so that we can elide undefined symbols. 42 43state == "nm" && /^%%/ { 44 state = "ver"; 45 next; 46} 47 48state == "nm" && ($1 == "U" || $2 == "U") { 49 next; 50} 51 52state == "nm" && NF == 3 { 53 def[$3] = 1; 54 next; 55} 56 57state == "nm" { 58 next; 59} 60 61# Now we process a simplified variant of the Solaris symbol version 62# script. We have one symbol per line, no semicolons, simple markers 63# for beginning and ending each section, and %inherit markers for 64# describing version inheritance. A symbol may appear in more than 65# one symbol version, and the last seen takes effect. 66# The magic version name '%exclude' causes all the symbols given that 67# version to be dropped from the output (unless a later version overrides). 68 69NF == 3 && $1 == "%inherit" { 70 next; 71} 72 73NF == 2 && $2 == "{" { 74 if ($1 == "%exclude") 75 excluding = 1; 76 next; 77} 78 79$1 == "}" { 80 excluding = 0; 81 next; 82} 83 84{ 85 sym = prefix $1; 86 if (excluding) 87 delete export[sym]; 88 else 89 export[sym] = 1; 90 next; 91} 92 93END { 94 95 if (pe_dll) { 96 print "LIBRARY " pe_dll; 97 print "EXPORTS"; 98 } 99 100 for (sym in export) 101 if (def[sym] || (pe_dll && def["_" sym])) 102 print sym; 103} 104