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#!/usr/bin/perl -w
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=head1 NAME
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B<autofixtll> - auto-correct CMake TARGET_LINK_LIBRARIES directive according to
|
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the information provided by GNU ld linker S<I<'undefined references'>> errors.
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=head1 SYNOPSIS
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B<autofixtll> [B<--invoke-edit|-e>] [B<--build-dir|-b>=I<dir>] [B<--build-command|-c>=I<command>] [B<--patch-name|-p>=I<name>] [B<--do-backups>]
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=head1 DESCRIPTION
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B<autofixtll> is capable of correcting most linking failures caused by
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S<'undefined references'> linker errors. The script should be executed from the
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extracted debian source tree with all build dependences installed in the
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environment. This script is a wrapper around S<`debian/rules build'> or
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whatever command you specify with B<--build-command> option.
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B<autofixtll> depends on B<quilt> to incrementally build up a patch of the
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changes it does. The script assumes that quilt patches are located in
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debian/patches. The default name of the patch is
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S<I<"97_fix_target_link_libraries.diff">> (it can be changed with the
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[B<--patch-name> option). This patch must have already pushed to the "quilt
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top" when this script is executed.
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First of all, the script loads dynamic symbol names of the libraries specified
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in the @LIBS array. Then it starts building process and keeps monitoring it
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while looking for the "undefined references" errors from the linker (only GNU
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ld syntax is supported). Then it tries to match undefined symbol names with the
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symbols loaded from the libraries in the @LIBS array. If matches are found, it
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tries to update TARGET_LINK_LIBRARIES command in the respective CMakeLists.txt
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file adding missing libraries. Finally, the build process is restarted.
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This loop continues until build completes successfully or the error which
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B<autofixtll> can't handle occurs. In latter case, a user will need to `quilt
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edit' the respective file manually or add more libs to the @LIBS array. Then
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the script can be restarted again (or use --invoke-edit option to invoke
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I<quilt edit> and restart build for you automatically).
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CMake verbose output must be enabled for B<autofixtll> to work reliably.
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B<autofixtll> was written to help maintainer resolve build failures of KDE
|
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applications which were introduced by the clean up of KDELibs recursive library
|
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dependences.
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=head1 OPTIONS
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=over 4
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=item B<-b> I<dir>, B<--build-dir>=I<dir>
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Specify a custom build directory. It must be relative the current (source)
|
| 54 |
directory. Default is as returned by S<I<"obj-`dpkg-architecture
|
| 55 |
-qDEB_BUILD_GNU_TYPE`>">.
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=item B<-c> I<command>, B<--build-command>=I<command>
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The command which should be run to build the source. If the command is not
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specific, `debian/rules build' will be executed from the B<source tree>.
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However, if you specify the command, it will be from the B<build tree>.
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=item B<-p>, B<--patch-name>=I<name>
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The name of the quilt patch in which all changes made by the script will be
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stored. Default is I<97_fix_target_link_libraries.diff>.
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=item B<--do-backups>, B<--backup>
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Whether to backup CMakeLists.txt as CMakeLists.txt.orig before auto-modifying
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it.
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=item B<--invoke-edit>, B<--edit>, B<-e>
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Invoke `quilt edit' on the respective CMakeLists.txt when undefined references
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cannot be automatically resolved and restart build process immediately when the
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editor is closed.
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=back
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=head1 LICENSE
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This program is free software: you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free Software
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Foundation, either version 3 of the License, or (at your option) any later
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version.
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On B<Debian> systems, the complete text of the GNU GPL v3 can be found in the
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file F</usr/share/common-licenses/GPL-3>
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=head1 AUTHORS
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Written by Modestas Vainius <modestas@vainius.eu>
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=cut
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use strict;
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use Cwd qw(getcwd realpath);
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use File::Spec;
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use File::Copy;
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use Getopt::Long;
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use Pod::Usage;
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use FileHandle;
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use IPC::Open2;
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#### Please add predefined libraries to load dynamic symbol from here.
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# new Library(name, cmake_target, [path]). If path is not specified,
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# it's /usr/lib/$name.so. Use '' quotes to avoid escaping $.
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| 109 |
my @LIBS = (
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| 110 |
new Library('QtDBus', '${QT_QTDBUS_LIBRARY}'),
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| 111 |
new Library('QtNetwork', '${QT_QTNETWORK_LIBRARY}'),
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| 112 |
new Library('QtXml', '${QT_QTXML_LIBRARY}'),
|
| 113 |
new Library('QtSvg', '${QT_QTSVG_LIBRARY}'),
|
| 114 |
new Library('X11', '${X11_X11_LIB}'),
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| 115 |
new Library('z', '${ZLIB_LIBRARY}'),
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| 116 |
);
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#### Some defaults
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my $QUILT = "QUILT_PATCHES=debian/patches quilt";
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my $MSG_PREFIX = "--=--";
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############### Implementation ###############################
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| 124 |
sub Library::new {
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| 125 |
my ($cls, $name, $cmake_target, $path) = @_;
|
| 126 |
if (!defined $path) {
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| 127 |
$path = "/usr/lib/lib$name.so";
|
| 128 |
}
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| 129 |
return bless( { name => $name, path => $path, cmake_target => $cmake_target }, $cls);
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| 130 |
}
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| 131 |
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| 132 |
sub Library::load {
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| 133 |
my $self = shift;
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| 134 |
my @symbols;
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my @cpp_symbols;
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| 136 |
if (-r $self->{path}) {
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| 137 |
open(OBJDUMP, "objdump -T '$self->{path}' |") or die "Unable to run objdump";
|
| 138 |
while(<OBJDUMP>) {
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| 139 |
# 0000000000021e80 g DF .text 00000000000000f9 Base _XSendClientPrefix
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| 140 |
if (m/^[0-9a-f]+\s+g\s+DF\s+\.text\s+[0-9a-f]+\s+Base\s+(.*)$/) {
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my $symbol = $1;
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if ($symbol =~ m/^_Z/) {
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# It is C++ symbol. Needs demangling.
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push @cpp_symbols, $symbol;
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} else {
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# FIXME: use hashes?
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push @symbols, $symbol;
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}
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}
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}
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close(OBJDUMP);
|
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}
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| 153 |
if (@cpp_symbols) {
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open2(*OUT, *IN, "c++filt") or die "Unable to run c++filt";
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for (@cpp_symbols) {
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print IN "$_\n";
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}
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close(IN);
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| 159 |
my $count = 0;
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| 160 |
while(<OUT>) {
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| 161 |
chomp;
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# Don't care about everything after `('
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| 163 |
s/\(.*$//;
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s/^non-virtual thunk to\s+//;
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push @symbols, $_;
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$count++;
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| 167 |
}
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| 168 |
close(OUT);
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print(STDERR "Lost a few C++ symbols (", (scalar(@cpp_symbols) - $count),
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| 170 |
") while demangling ", $self->to_string(), "\n") unless ($count == scalar(@cpp_symbols));
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| 171 |
}
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| 172 |
if (@symbols) {
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| 173 |
$self->{symbols} = \@symbols;
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return scalar(@symbols);
|
| 175 |
} else {
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| 176 |
$self->{symbols} = [];
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| 177 |
return 0;
|
| 178 |
}
|
| 179 |
}
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| 181 |
sub Library::has_symbol {
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| 182 |
my ($self, $symbol) = @_;
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| 183 |
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| 184 |
for my $sym (@{$self->{symbols}}) {
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| 185 |
if ($symbol =~ m/^\Q$sym\E/) {
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return 1;
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}
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}
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return 0;
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| 191 |
}
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| 193 |
sub Library::to_string() {
|
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my ($self) = @_;
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| 195 |
return $self->{name} . " ( " . $self->{path} . " )";
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}
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| 198 |
sub IgnoreStack::new {
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return bless( { stack => [] }, shift() );
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}
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sub IgnoreStack::process_line {
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my ($self, $line) = @_;
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my $stack = $self->{stack};
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| 206 |
if ($line =~ m/^\s*((end)?(foreach|function|if|macro|while))\s*[(]/i) {
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| 207 |
my $isend = defined $2;
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my $cmd = uc($3);
|
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| 210 |
if ($isend) {
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| 211 |
if (@$stack) {
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| 212 |
my $s = pop @$stack;
|
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print STDERR "$MSG_PREFIX There is something wrong with IgnoreStack:\n",
|
| 214 |
"$MSG_PREFIX stack top ($s) does not match end command ($cmd)\n" if $s ne $cmd;
|
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} else {
|
| 216 |
print STDERR "$MSG_PREFIX IgnoreStack is empty but got 'end$cmd'. A bug probably.\n";
|
| 217 |
}
|
| 218 |
} else {
|
| 219 |
push @$stack, $cmd;
|
| 220 |
}
|
| 221 |
return 1; # Processed
|
| 222 |
} else {
|
| 223 |
return 0;
|
| 224 |
}
|
| 225 |
}
|
| 226 |
|
| 227 |
sub IgnoreStack::is_empty {
|
| 228 |
return scalar(@{shift()->{stack}}) == 0;
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}
|
| 230 |
|
| 231 |
sub IgnoreStack::dump_stack {
|
| 232 |
my $self = shift;
|
| 233 |
print "Ignore stack dump:\n";
|
| 234 |
for my $e (@{$self->{stack}}) {
|
| 235 |
print " $e\n";
|
| 236 |
}
|
| 237 |
}
|
| 238 |
|
| 239 |
sub determine_needed_libs {
|
| 240 |
my ($alllibs, $undefrefs) = @_;
|
| 241 |
my @_libs;
|
| 242 |
my @libs = ();
|
| 243 |
|
| 244 |
for my $ref (@$undefrefs) {
|
| 245 |
my $lib;
|
| 246 |
for my $lib (@$alllibs) {
|
| 247 |
if ($lib->has_symbol($ref)) {
|
| 248 |
push @_libs, $lib;
|
| 249 |
next;
|
| 250 |
}
|
| 251 |
}
|
| 252 |
}
|
| 253 |
|
| 254 |
# Kill dupes
|
| 255 |
my $prev = "";
|
| 256 |
for (sort { $a->{cmake_target} cmp $b->{cmake_target} } @_libs) {
|
| 257 |
if ($_ ne $prev) {
|
| 258 |
push @libs, $_;
|
| 259 |
$prev = $_;
|
| 260 |
}
|
| 261 |
}
|
| 262 |
|
| 263 |
return \@libs;
|
| 264 |
}
|
| 265 |
|
| 266 |
sub write_target_link_libs {
|
| 267 |
my ($dir, $target, $libs, $do_backups) = @_;
|
| 268 |
my $cmakelists = File::Spec->catfile($dir, "CMakeLists.txt");
|
| 269 |
my $strlibs = join(" ", map($_->{cmake_target}, @$libs));
|
| 270 |
|
| 271 |
if (-r $cmakelists) {
|
| 272 |
my @contents;
|
| 273 |
my @ignored;
|
| 274 |
my $found = 0;
|
| 275 |
# Ignore directive inside if/endif, while/endwhile etc. blocks
|
| 276 |
my $ignstack = new IgnoreStack;
|
| 277 |
|
| 278 |
# Read and change
|
| 279 |
open(CMAKELISTS, "<$cmakelists");
|
| 280 |
while (<CMAKELISTS>) {
|
| 281 |
if (!$found && !$ignstack->process_line($_) &&
|
| 282 |
m/^\s*(target_link_libraries\s*\(\s*$target\s+)(.*?)(\s*\).*)?$/i) {
|
| 283 |
|
| 284 |
# Fix it
|
| 285 |
my $newline = $1;
|
| 286 |
my $end = $3;
|
| 287 |
$newline .= $2 if ($2);
|
| 288 |
$newline .= " " if ($newline !~ m/\s+$/);
|
| 289 |
$newline .= $strlibs;
|
| 290 |
$newline .= $end if ($end);
|
| 291 |
$newline .= "\n";
|
| 292 |
|
| 293 |
if ($ignstack->is_empty()) {
|
| 294 |
push @contents, $newline;
|
| 295 |
$found = $.;
|
| 296 |
} else {
|
| 297 |
# Save for later use
|
| 298 |
push @ignored, { found => $., newline => $newline };
|
| 299 |
push @contents, $_;
|
| 300 |
}
|
| 301 |
} else {
|
| 302 |
push @contents, $_;
|
| 303 |
}
|
| 304 |
}
|
| 305 |
close(CMAKELISTS);
|
| 306 |
|
| 307 |
if (!$ignstack->is_empty()) {
|
| 308 |
$ignstack->dump_stack();
|
| 309 |
print STDERR "$cmakelists has been processed but ignore stack is not empty. Probably a bug!\n";
|
| 310 |
}
|
| 311 |
|
| 312 |
if (!$found && @ignored == 1) {
|
| 313 |
# That's probably it as there were no other candidates. Replace
|
| 314 |
$found = ${ignored[0]}->{found};
|
| 315 |
my $newline = ${ignored[0]}->{newline};
|
| 316 |
$contents[$found-1] = $newline;
|
| 317 |
} else {
|
| 318 |
print "$MSG_PREFIX More (", scalar(@ignored), ") than 1 target_link_libraries() found in the IF/WHILE etc. blocks\n";
|
| 319 |
}
|
| 320 |
|
| 321 |
if (!$found) {
|
| 322 |
die "$MSG_PREFIX $cmakelists could not be corrected (needed '$strlibs' for target '$target'). Respective target_link_libraries() was not found $MSG_PREFIX";
|
| 323 |
} else {
|
| 324 |
# Write
|
| 325 |
system("$QUILT add '$cmakelists'");
|
| 326 |
open(CMAKELISTS, ">$cmakelists.tmp");
|
| 327 |
for (@contents) {
|
| 328 |
print CMAKELISTS $_;
|
| 329 |
}
|
| 330 |
close(CMAKELISTS);
|
| 331 |
if ($do_backups) {
|
| 332 |
File::Copy::move("$cmakelists", "$cmakelists.orig")
|
| 333 |
or die "Could not rename file '$cmakelists' -> '$cmakelists.org'";
|
| 334 |
}
|
| 335 |
File::Copy::move("$cmakelists.tmp", "$cmakelists")
|
| 336 |
or die "Could not rename file '$cmakelists.tmp' -> '$cmakelists'";
|
| 337 |
print "$MSG_PREFIX $cmakelists edited. Added libraries '$strlibs' for target $target\n";
|
| 338 |
}
|
| 339 |
} else {
|
| 340 |
die "$cmakelists for target $target could not be found. Something is wrong";
|
| 341 |
}
|
| 342 |
}
|
| 343 |
|
| 344 |
sub build_and_fix {
|
| 345 |
my ($sourcedir, $builddir, $buildcmd, $do_backups, $invoke_edit) = @_;
|
| 346 |
|
| 347 |
my $bdir;
|
| 348 |
my $btarget;
|
| 349 |
my $islderror = 0;
|
| 350 |
my @undefrefs;
|
| 351 |
my $link_cmd = 0;
|
| 352 |
|
| 353 |
if (defined $buildcmd) {
|
| 354 |
chdir $builddir;
|
| 355 |
open(MAKE, "$buildcmd 2>&1 |") or die "Unable to run `$buildcmd' in $builddir";
|
| 356 |
} else {
|
| 357 |
chdir $sourcedir;
|
| 358 |
open(MAKE, "debian/rules build 2>&1 |") or die "Unable to run `$buildcmd' in $builddir";
|
| 359 |
}
|
| 360 |
|
| 361 |
while (<MAKE>) {
|
| 362 |
# [ 39%] Building CXX object kwin/kcmkwin/kwindecoration/CMakeFiles
|
| 363 |
print $_;
|
| 364 |
chomp;
|
| 365 |
if ($link_cmd) {
|
| 366 |
#cd /buildd/kdebase-workspace/obj-x86_64-linux-gnu/kwin/kcmkwin/kwindecoration && /usr/bin/cmake -E cmake_link_script CMakeFiles/kcm_kwindecoration.dir/link.txt $MSG_PREFIXverbose=1
|
| 367 |
if (m#^cd (.*) && .*/cmake -E cmake_link_script CMakeFiles/(.*?)\.dir/#) {
|
| 368 |
$btarget = $2;
|
| 369 |
$bdir = File::Spec->abs2rel(Cwd::realpath($1), $builddir);
|
| 370 |
$link_cmd = 0;
|
| 371 |
} else {
|
| 372 |
die "Unrecognized link line";
|
| 373 |
}
|
| 374 |
} elsif (m/\[\s*\d+\%\] Building (.*) object (.*)/) {
|
| 375 |
$bdir = $2;
|
| 376 |
if ($bdir =~ m#CMakeFiles/(.*?)\.dir/#) {
|
| 377 |
$btarget = $1;
|
| 378 |
} else {
|
| 379 |
die "Could not extract target from $bdir";
|
| 380 |
}
|
| 381 |
$bdir =~ s#/CMakeFiles/.*##;
|
| 382 |
} elsif (m/^Linking (.*) (shared (module|library)|executable) /) {
|
| 383 |
$link_cmd = 1;
|
| 384 |
} elsif (m/undefined reference to `(.*)'$/) {
|
| 385 |
# undefined reference to `QDBusMessage::createSignal(QString const&, QString const&, QString const&)'
|
| 386 |
push @undefrefs, $1;
|
| 387 |
} elsif (m/collect\d+: ld returned \d+ exit status/) {
|
| 388 |
$islderror = 1;
|
| 389 |
}
|
| 390 |
}
|
| 391 |
|
| 392 |
close(MAKE);
|
| 393 |
|
| 394 |
chdir $sourcedir;
|
| 395 |
|
| 396 |
# Try to correct the error
|
| 397 |
# print $MSG_PREFIX, $islderror, $bdir, $btarget, @undefrefs;
|
| 398 |
if ($islderror && $bdir && $btarget && @undefrefs) {
|
| 399 |
my $libs = determine_needed_libs(\@LIBS, \@undefrefs);
|
| 400 |
if (@$libs) {
|
| 401 |
write_target_link_libs($bdir, $btarget, $libs, $do_backups);
|
| 402 |
return 0; # again
|
| 403 |
} else {
|
| 404 |
my $cmakelists = "$bdir/CMakeLists.txt";
|
| 405 |
print "$MSG_PREFIX Could not resolve linkage problem automatically. Undefined symbols have not been recognized\n";
|
| 406 |
print "$MSG_PREFIX Target: $btarget; CMakeLists.txt: $cmakelists", "\n";
|
| 407 |
my $quilt_cmd = "$QUILT edit $cmakelists";
|
| 408 |
if ($invoke_edit) {
|
| 409 |
print "$MSG_PREFIX Press any key to edit '$cmakelists' or ^C to cancel ...";
|
| 410 |
<>;
|
| 411 |
system($quilt_cmd);
|
| 412 |
} else {
|
| 413 |
print "$MSG_PREFIX You probably want to run the command to correct the problem yourself: \n",
|
| 414 |
"$MSG_PREFIX \$ $quilt_cmd\n";
|
| 415 |
return 2;
|
| 416 |
}
|
| 417 |
}
|
| 418 |
} else {
|
| 419 |
#print $islderror, ", ", $bdir, ", ", $btarget, ", ", @undefrefs, "\n";
|
| 420 |
print "$MSG_PREFIX Building completed successfully or unrecognized error\n";
|
| 421 |
return 1;
|
| 422 |
}
|
| 423 |
}
|
| 424 |
|
| 425 |
sub load_libraries {
|
| 426 |
my $LIBS = shift;
|
| 427 |
|
| 428 |
print "$MSG_PREFIX Reading dynamic symbol table of ", scalar(@$LIBS), " shared libraries... ", "\n";
|
| 429 |
my $count = 0;
|
| 430 |
for my $lib (@$LIBS) {
|
| 431 |
print "$MSG_PREFIX Loading ", $lib->to_string(), " ... ";
|
| 432 |
if ($lib->load()) {
|
| 433 |
print "success\n";
|
| 434 |
$count++;
|
| 435 |
} else {
|
| 436 |
print "failed (path is not readable or has no symbols)\n";
|
| 437 |
}
|
| 438 |
}
|
| 439 |
return $count;
|
| 440 |
}
|
| 441 |
|
| 442 |
sub check_environment {
|
| 443 |
my ($builddir, $patchname) = @_;
|
| 444 |
|
| 445 |
print "$MSG_PREFIX Script Version v$main::VERSION $MSG_PREFIX", "\n";
|
| 446 |
|
| 447 |
system("dh_testdir") == 0 or die "$MSG_PREFIX Please run this script from the debianized source tree $MSG_PREFIX\n";
|
| 448 |
|
| 449 |
my $toppatch = `$QUILT top`;
|
| 450 |
chomp $toppatch;
|
| 451 |
if (!defined $toppatch || $toppatch ne $patchname) {
|
| 452 |
die "$MSG_PREFIX Quilt top patch must be named '$patchname' when this script is run. Please either:\n" .
|
| 453 |
"$MSG_PREFIX \$ $QUILT push $patchname\n" .
|
| 454 |
"$MSG_PREFIX \$ $QUILT new $patchname\n";
|
| 455 |
}
|
| 456 |
}
|
| 457 |
|
| 458 |
sub get_gnu_build_type {
|
| 459 |
my $buildtype = `dpkg-architecture -qDEB_BUILD_GNU_TYPE`;
|
| 460 |
chomp $buildtype;
|
| 461 |
return $buildtype;
|
| 462 |
}
|
| 463 |
|
| 464 |
############## Main loop ##############################
|
| 465 |
|
| 466 |
$main::VERSION = "0.3";
|
| 467 |
|
| 468 |
my $sourcedir = Cwd::getcwd();
|
| 469 |
my $builddir = "obj-" . get_gnu_build_type();
|
| 470 |
my $buildcmd = undef;
|
| 471 |
my $patchname = "97_fix_target_link_libraries.diff";
|
| 472 |
my $do_backups = 0;
|
| 473 |
my $show_help = 0;
|
| 474 |
my $invoke_edit = 0;
|
| 475 |
|
| 476 |
if (GetOptions(
|
| 477 |
"help|h|?" => \$show_help,
|
| 478 |
"build-dir|b=s" => \$builddir,
|
| 479 |
"build-command|c=s" => \$buildcmd,
|
| 480 |
"patch-name|p=s" => \$patchname,
|
| 481 |
"do-backups|backup!" => \$do_backups,
|
| 482 |
"invoke-edit|edit|e!" => \$invoke_edit,
|
| 483 |
)) {
|
| 484 |
|
| 485 |
pod2usage(-exitval => 1, -verbose => 2, -noperldoc => 1) if ($show_help);
|
| 486 |
|
| 487 |
$builddir = Cwd::realpath(File::Spec->catdir($sourcedir, $builddir));
|
| 488 |
check_environment($builddir, $patchname);
|
| 489 |
|
| 490 |
if (load_libraries(\@LIBS) == 0) {
|
| 491 |
die "Error: No dynamic symbols found in predefined libraries";
|
| 492 |
}
|
| 493 |
|
| 494 |
my $ret;
|
| 495 |
while (!($ret = build_and_fix($sourcedir, $builddir, $buildcmd, $do_backups, $invoke_edit))) {
|
| 496 |
print "$MSG_PREFIX Linkage problem fixed, rebuilding again\n";
|
| 497 |
}
|
| 498 |
|
| 499 |
if ($ret == 1) {
|
| 500 |
print "$MSG_PREFIX If build process is complete, you may want to run the following command to build/refresh the patch\n" .
|
| 501 |
"$MSG_PREFIX \$ $QUILT refresh --no-index\n";
|
| 502 |
if ($do_backups) {
|
| 503 |
print "$MSG_PREFIX Also run the following command to cleanup backup files:\n" .
|
| 504 |
"$MSG_PREFIX \$ find -name 'CMakeLists.txt.orig' -delete\n";
|
| 505 |
}
|
| 506 |
}
|
| 507 |
|
| 508 |
exit 0;
|
| 509 |
} else {
|
| 510 |
podusage(-exitval => 2, -verbose => 1);
|
| 511 |
}
|
| 512 |
|
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| 
Revision Log