1# Generate a flat list of symbols to export. 2# Contributed by Richard Henderson <rth@cygnus.com> 3# 4# This file is part of GCC. 5# 6# GCC is free software; you can redistribute it and/or modify it under 7# the terms of the GNU General Public License as published by the Free 8# Software Foundation; either version 2, or (at your option) any later 9# version. 10# 11# GCC is distributed in the hope that it will be useful, but WITHOUT 12# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 13# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public 14# License for more details. 15# 16# You should have received a copy of the GNU General Public License 17# along with GCC; see the file COPYING. If not, write to the Free 18# Software Foundation, 51 Franklin Street, Fifth Floor, Boston MA 19# 02110-1301, USA. 20 21BEGIN { 22 state = "nm"; 23 excluding = 0; 24 if (leading_underscore) 25 prefix = "_"; 26 else 27 prefix = ""; 28} 29 30# Remove comment and blank lines. 31/^ *#/ || /^ *$/ { 32 next; 33} 34 35# We begin with nm input. Collect the set of symbols that are present 36# so that we can elide undefined symbols. 37 38state == "nm" && /^%%/ { 39 state = "ver"; 40 next; 41} 42 43state == "nm" && ($1 == "U" || $2 == "U") { 44 next; 45} 46 47state == "nm" && NF == 3 { 48 def[$3] = 1; 49 next; 50} 51 52state == "nm" { 53 next; 54} 55 56# Now we process a simplified variant of the Solaris symbol version 57# script. We have one symbol per line, no semicolons, simple markers 58# for beginning and ending each section, and %inherit markers for 59# describing version inheritence. A symbol may appear in more than 60# one symbol version, and the last seen takes effect. 61# The magic version name '%exclude' causes all the symbols given that 62# version to be dropped from the output (unless a later version overrides). 63 64NF == 3 && $1 == "%inherit" { 65 next; 66} 67 68NF == 2 && $2 == "{" { 69 if ($1 == "%exclude") 70 excluding = 1; 71 next; 72} 73 74$1 == "}" { 75 excluding = 0; 76 next; 77} 78 79{ 80 sym = prefix $1; 81 if (excluding) 82 delete export[sym]; 83 else 84 export[sym] = 1; 85 next; 86} 87 88END { 89 for (sym in export) 90 if (def[sym]) 91 print sym; 92} 93