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* dh_shlibdeps: Change "-L pkg" to cause "-Sdebian/pkg" to be passed to
[debhelper.git] / dh_shlibdeps
1 #!/usr/bin/perl -w
2
3 =head1 NAME
4
5 dh_shlibdeps - calculate shared library dependencies
6
7 =cut
8
9 use strict;
10 use Cwd;
11 use Debian::Debhelper::Dh_Lib;
12
13 =head1 SYNOPSIS
14
15 B<dh_shlibdeps> [S<I<debhelper options>>] [B<-L>I<package>] [B<-l>I<directory>] [B<-X>I<item>] [S<B<--> I<params>>]
16
17 =head1 DESCRIPTION
18
19 dh_shlibdeps is a debhelper program that is responsible for calculating
20 shared library dependencies for packages.
21
22 This program is merely a wrapper around L<dpkg-shlibdeps(1)> that calls it
23 once for each package listed in the control file, passing it
24 a list of ELF executables and shared libraries it has found.
25
26 =head1 OPTIONS
27
28 =over 4
29
30 =item B<-u>I<params>, B<--dpkg-shlibdeps-params=>I<params>
31
32 =item B<--> I<params>
33
34 Pass "params" to L<dpkg-shlibdeps(1)>.
35
36 =item B<-X>I<item>, B<--exclude=>I<item>
37
38 Exclude files that contain "item" anywhere in their filename from being
39 passed to dpkg-shlibdeps. This will make their dependencies be ignored.
40 This may be useful in some situations, but use it with caution. This option
41 may be used more than once to exclude more than one thing.
42
43 =item B<-l>I<directory>[:directory:directory:..]
44
45 With recent versions of dpkg-shlibdeps, this option is generally not
46 needed.
47
48 Before dpkg-shlibdeps is run, LD_LIBRARY_PATH will have added to it the 
49 specified directory (or directories -- separate with colons). With recent
50 versions of dpkg-shlibdeps, this is mostly only useful for packages that
51 build multiple flavors of the same library, or other situations where
52 the library is installed into a directory not on the regular library search
53 path.
54
55 =item B<-L>I<package>, B<--libpackage=>I<package>
56
57 With recent versions of dpkg-shlibdeps, this option is generally not
58 needed, unless your package builds multiple flavors of the same library.
59
60 It tells dpkg-shlibdeps (via its -S parameter) to look first in the package
61 build directory for the specified package, when searching for libraries,
62 symbol files, and shlibs files.
63
64 =back
65
66 =head1 EXAMPLES
67
68 Suppose that your source package produces libfoo1, libfoo-dev, and
69 libfoo-bin binary packages. libfoo-bin links against libfoo1, and should
70 depend on it. In your rules file, first run dh_makeshlibs, then dh_shlibdeps:
71
72         dh_makeshlibs
73         dh_shlibdeps
74
75 This will have the effect of generating automatically a shlibs file for
76 libfoo1, and using that file and the libfoo1 library in the
77 debian/libfoo1/usr/lib directory to calculate shared library dependency
78 information.
79
80 If a libbar1 package is also produced, that is an alternate build of
81 libfoo, and is installed into /usr/lib/bar/, you can make libfoo-bin depend
82 on libbar1 as follows:
83
84         dh_shlibdeps -Llibbar1 -l/usr/lib/bar
85
86 =cut
87
88 init();
89
90 if ($dh{L_PARAMS}) {
91         my @paths=();
92         # Add to existing paths, if set.
93         push @paths, $ENV{'LD_LIBRARY_PATH'}
94                 if exists $ENV{'LD_LIBRARY_PATH'};
95         foreach (split(/:/, $dh{L_PARAMS})) {
96                 # Force the path absolute.
97                 if (m:^/:) {
98                         push @paths, $_;
99                 }
100                 else {
101                         push @paths, "/$_";
102                 }
103         }
104         $dh{L_PARAMS}=join(':', @paths);
105 }
106
107 foreach my $package (@{$dh{DOPACKAGES}}) {
108         my $tmp=tmpdir($package);
109         my $ext=pkgext($package);
110
111         my @filelist;
112         my $ff;
113
114         # Generate a list of ELF binaries in the package, ignoring any
115         # we were told to exclude.
116         my $find_options='';
117         if (defined($dh{EXCLUDE_FIND}) && $dh{EXCLUDE_FIND} ne '') {
118                 $find_options="! \\( $dh{EXCLUDE_FIND} \\)";
119         }
120         foreach my $file (split(/\n/,`find $tmp -path $tmp/usr/lib/debug -prune -or -type f \\( -perm +111 -or -name "*.so*" \\) $find_options -print`)) {
121                 # TODO this is slow, optimize. Ie, file can run once on
122                 # multiple files..
123                 $ff=`file "$file"`;
124                 if ($ff=~m/ELF/ && $ff!~/statically linked/) {
125                         push @filelist,$file;
126                 }
127         }
128
129         if (@filelist) {
130                 my @opts;
131                 if (defined $dh{LIBPACKAGE} && length $dh{LIBPACKAGE}) {
132                         @opts=("-S".tmpdir($dh{LIBPACKAGE}));
133                 }
134                 
135                 push @opts, "-tudeb" if is_udeb($package);
136                 
137                 my $ld_library_path_orig=$ENV{LD_LIBRARY_PATH};
138                 if ($dh{L_PARAMS}) {
139                         $ENV{LD_LIBRARY_PATH}=$dh{L_PARAMS};
140                         verbose_print("LD_LIBRARY_PATH=$dh{L_PARAMS}");
141                 }
142                 
143                 doit("dpkg-shlibdeps","-Tdebian/${ext}substvars",
144                         @opts,@{$dh{U_PARAMS}},@filelist);
145
146                 if ($dh{L_PARAMS}) {
147                         if (defined $ld_library_path_orig) {
148                                 $ENV{LD_LIBRARY_PATH}=$ld_library_path_orig;
149                         }
150                         else {
151                                 delete $ENV{LD_LIBRARY_PATH};
152                         }
153                 }
154         }
155 }
156
157 =head1 SEE ALSO
158
159 L<debhelper(7)>, L<dpkg-shlibdeps(1)>
160
161 This program is a part of debhelper.
162
163 =head1 AUTHOR
164
165 Joey Hess <joeyh@debian.org>
166
167 =cut