Package: dpkg-dev
Version: 1.14.22
Severity: normal
I got lots of lines warning of useless dependencies on libraries because
I didn't use any symbols.
dpkg-shlibdeps: warning: dependency on libncurses.so.5 could be avoided if
"debian/libtermkey0/usr/lib/libtermkey.so.0.1" were not uselessly linked
against it (they use none of its symbols).
A quick look with 'nm -D' on the library in my package and the library
it claimed to link against showed this was bogus:
$ nm -D libtermkey.so | grep tiogetstr
U tigetstr
$ nm -D /usr/lib/libncurses.so.5 | grep tigetstr
000000000002bfd0 T tigetstr
I went hunting in the code and eventually found this to be a bug in a
regexp in Objdump.pm, line 255:
if ($line =~ /^[0-9a-f]+
(.{7})\s+(\S+)\s+[0-9a-f]+\s+(\S+)?(?:(?:\s+$vis_re)?\s+(\S+))/) {
This RE uses a useless noncapturing group at the end (?: ... ) when I
think it ought to be moved. If I inspect runtime using perl -d on this
module against my library, I find:
$line = "0000000000000000 D *UND*\cI0000000000000000 snprintf"
Using your original regexp:
eval: [ $line =~ /^[0-9a-f]+
(.{7})\s+(\S+)\s+[0-9a-f]+\s+(\S+)?(?:(?:\s+$vis_re)?\s+(\S+))/ ]
[ ]
I.e. no match. Instead by fixing it:
eval: [ $line =~ /^[0-9a-f]+
(.{7})\s+(\S+)\s+[0-9a-f]+(?:\s+(\S+))?(?:\s+$vis_re)?\s+(\S+)/ ]
[ ' D ', '*UND*', undef, undef, 'snprintf' ]
corresponding to the variables later unpacked:
my ($flags, $sect, $ver, $vis, $name) = ($1, $2, $3, $4, $5);
-- System Information:
Debian Release: lenny/sid
APT prefers testing
APT policy: (990, 'testing'), (500, 'unstable')
Architecture: amd64 (x86_64)
Kernel: Linux 2.6.26-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash
Versions of packages dpkg-dev depends on:
ii binutils 2.18.1~cvs20080103-7 The GNU assembler, linker and bina
ii bzip2 1.0.5-1 high-quality block-sorting file co
ii cpio 2.9-13 GNU cpio -- a program to manage ar
ii dpkg 1.14.22 Debian package management system
ii libtimedate-perl 1.1600-9 Time and date functions for Perl
ii lzma 4.43-14 Compression method of 7z format in
ii make 3.81-5 The GNU version of the "make" util
ii patch 2.5.9-5 Apply a diff file to an original
ii perl [perl5] 5.10.0-17 Larry Wall's Practical Extraction
ii perl-modules 5.10.0-17 Core Perl modules
Versions of packages dpkg-dev recommends:
ii build-essential 11.4 Informational list of build-essent
ii gcc [c-compiler] 4:4.3.2-2 The GNU C compiler
ii gcc-4.1 [c-compiler] 4.1.2-23 The GNU C compiler
ii gcc-4.3 [c-compiler] 4.3.2-1 The GNU C compiler
Versions of packages dpkg-dev suggests:
ii debian-keyring 2008.07.22 GnuPG (and obsolete PGP) keys of D
ii gnupg 1.4.9-3 GNU privacy guard - a free PGP rep
-- no debconf information
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