diff options
Diffstat (limited to 'sysdeps/gnu/errlist-compat.awk')
| -rw-r--r-- | sysdeps/gnu/errlist-compat.awk | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/sysdeps/gnu/errlist-compat.awk b/sysdeps/gnu/errlist-compat.awk new file mode 100644 index 0000000000..84cee1565b --- /dev/null +++ b/sysdeps/gnu/errlist-compat.awk @@ -0,0 +1,104 @@ +# awk script to generate errlist-compat.c +# Copyright (C) 2002 Free Software Foundation, Inc. +# This file is part of the GNU C Library. + +# The GNU C Library is free software; you can redistribute it and/or +# modify it under the terms of the GNU Lesser General Public +# License as published by the Free Software Foundation; either +# version 2.1 of the License, or (at your option) any later version. + +# The GNU C Library 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 +# Lesser General Public License for more details. + +# You should have received a copy of the GNU Lesser General Public +# License along with the GNU C Library; if not, write to the Free +# Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA +# 02111-1307 USA. + +# +# This script takes the Versions file as input and looks for #errlist-compat +# magic comments, which have the form: +# #errlist-compat NNN +# where NNN is the number of elements in the sys_errlist for that version set. +# We need the awk variable `maxerr' defined to the current size of sys_errlist. +# +# If there is no magic comment matching the current size, we barf. +# Otherwise we generate code (errlist-compat.c) to define all the +# necessary compatibility symbols for older, smaller versions of sys_errlist. +# + +BEGIN { highest = 0 } + +# These two rules catch the Versions file contents. +NF == 2 && $2 == "{" { last_version = $1; next } +$1 == "#errlist-compat" { + n = $2 + 0; + if (n < 100) { + print "*** this line seems bogus:", $0 > "/dev/stderr"; + exit 1; + } + version[n] = last_version; + if (n > highest) + highest = n; + next; +} + +END { + count = maxerr + 1; + + if (highest != count) { + printf "*** errlist.c count %d vs Versions sys_errlist@%s count %d\n", \ + count, version[highest], highest > "/dev/stderr"; + exit 1; + } + + lastv = ""; + for (n = 0; n <= count; ++n) + if (n in version) { + v = version[n]; + gsub(/[^A-Z0-9_]/, "_", v); + if (lastv != "") + compat[lastv] = v; + lastv = v; + vcount[v] = n; + } + + print "/* This file was generated by errlist-compat.awk; DO NOT EDIT! */\n"; + print "#include <shlib-compat.h>\n"; + + for (old in compat) { + new = compat[old]; + n = vcount[old]; + printf "#if SHLIB_COMPAT (libc, %s, %s)\n", old, new; + printf "extern const char *const __sys_errlist_%s[];\n", old; + printf "const int __sys_nerr_%s = %d;\n", old, n; + printf "strong_alias (_sys_errlist_internal, __sys_errlist_%s)\n", old; + printf "declare_symbol (__sys_errlist_%s, object, __WORDSIZE/8*%d)\n", \ + old, n; + printf "compat_symbol (libc, __sys_errlist_%s, sys_errlist, %s);\n", \ + old, old; + printf "compat_symbol (libc, __sys_nerr_%s, sys_nerr, %s);\n", old, old; + + printf "extern const char *const ___sys_errlist_%s[];\n", old; + printf "extern const int __sys_nerr_%s;\n", old; + printf "strong_alias (__sys_errlist_%s, ___sys_errlist_%s)\n", old, old; + printf "strong_alias (__sys_nerr_%s, ___sys_nerr_%s)\n", old, old; + printf "compat_symbol (libc, ___sys_errlist_%s, _sys_errlist, %s);\n", \ + old, old; + printf "compat_symbol (libc, ___sys_nerr_%s, _sys_nerr, %s);\n", old, old; + printf "#endif\n\n"; + } + + printf "\ +extern const char *const __sys_errlist_internal[];\n\ +extern const int __sys_nerr_internal;\n\ +strong_alias (_sys_errlist_internal, __sys_errlist_internal)\n\ +strong_alias (_sys_nerr_internal, __sys_nerr_internal)\n\ +versioned_symbol (libc, _sys_errlist_internal, sys_errlist, %s);\n\ +versioned_symbol (libc, __sys_errlist_internal, _sys_errlist, %s);\n\ +versioned_symbol (libc, _sys_nerr_internal, sys_nerr, %s);\n\ +versioned_symbol (libc, __sys_nerr_internal, _sys_nerr, %s);\n", \ + lastv, lastv, lastv, lastv; +} |