]> git.donarmstrong.com Git - debhelper.git/blob - dh_shlibdeps
r1785: * dh_shlibdeps: Avoid a use strict warning in some cases if
[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 Before dpkg-shlibdeps is run, LD_LIBRARY_PATH will have added to it the 
46 specified directory (or directories -- separate with colons). This is
47 useful for multi-binary packages where a library is built in one
48 package and another package contains binaries linked against said
49 library. Relative paths will be made absolute for the benefit of
50 dpkg-shlibdeps.
51
52 Note that the directory given should be the complete or relative path to
53 a directory that contains the library. See example below.
54
55 =item B<-L>I<package>, B<--libpackage=>I<package>
56
57 Use the shlibs file automatically generated by dh_makeshlibs for the named
58 package as a kind of automatically generated shlibs.local file. You can use
59 this switch in concert with the -l switch to make dpkg-shlibdeps find a
60 library built as part of the current package, and get the shlibs information.
61 See example below.
62
63 =back
64
65 =head1 EXAMPLES
66
67 Suppose that your source package produces libfoo1, libfoo-dev, and
68 libfoo-bin binary packages. libfoo-bin links against libfoo1, and should
69 depend on it. In your rules file, first run dh_makeshlibs, then dh_shlibdeps:
70
71         dh_makeshlibs
72         dh_shlibdeps -L libfoo1 -l debian/libfoo1/usr/lib
73
74 This will have the effect of generating automatically a shlibs file for
75 libfoo1, and using that file and the libfoo1 library in the
76 debian/libfoo1/usr/lib directory to calculate shared library dependency
77 information.
78
79 =cut
80
81 init();
82
83 if ($dh{L_PARAMS}) {
84         my @paths=();
85         # Add to existing paths, if set.
86         push @paths, $ENV{'LD_LIBRARY_PATH'}
87                 if exists $ENV{'LD_LIBRARY_PATH'};
88         foreach (split(/:/, $dh{L_PARAMS})) {
89                 # Force the path absolute.
90                 if (m:^/:) {
91                         push @paths, $_;
92                 }
93                 else {
94                         push @paths, getcwd()."/$_";
95                 }
96         }
97         $dh{L_PARAMS}=join(':', @paths);
98 }
99
100 foreach my $package (@{$dh{DOPACKAGES}}) {
101         my $tmp=tmpdir($package);
102         my $ext=pkgext($package);
103
104         my @filelist;
105         my $ff;
106
107         # Generate a list of ELF binaries in the package, ignoring any
108         # we were told to exclude.
109         my $find_options='';
110         if (defined($dh{EXCLUDE_FIND}) && $dh{EXCLUDE_FIND} ne '') {
111                 $find_options="! \\( $dh{EXCLUDE_FIND} \\)";
112         }
113         foreach my $file (split(/\n/,`find $tmp -path $tmp/usr/lib/debug -prune -or -type f \\( -perm +111 -or -name "*.so*" \\) $find_options -print`)) {
114                 # TODO this is slow, optimize. Ie, file can run once on
115                 # multiple files..
116                 $ff=`file "$file"`;
117                 if ($ff=~m/ELF/ && $ff!~/statically linked/) {
118                         push @filelist,$file;
119                 }
120         }
121
122         if (@filelist) {
123                 my @opts;
124                 if (defined $dh{LIBPACKAGE} && length $dh{LIBPACKAGE}) {
125                         @opts=("-L".tmpdir($dh{LIBPACKAGE}."/DEBIAN/shlibs"));
126                 }
127                 
128                 my $ld_library_path_orig=$ENV{LD_LIBRARY_PATH};
129                 if ($dh{L_PARAMS}) {
130                         $ENV{LD_LIBRARY_PATH}=$dh{L_PARAMS};
131                         verbose_print("LD_LIBRARY_PATH=$dh{L_PARAMS}");
132                 }
133                 
134                 doit("dpkg-shlibdeps","-Tdebian/${ext}substvars",
135                         @opts,@{$dh{U_PARAMS}},@filelist);
136
137                 if ($dh{L_PARAMS}) {
138                         if (defined $ld_library_path_orig) {
139                                 $ENV{LD_LIBRARY_PATH}=$ld_library_path_orig;
140                         }
141                         else {
142                                 delete $ENV{LD_LIBRARY_PATH};
143                         }
144                 }
145         }
146 }
147
148 =head1 SEE ALSO
149
150 L<debhelper(7)>, L<dpkg-shlibdeps(1)>
151
152 This program is a part of debhelper.
153
154 =head1 AUTHOR
155
156 Joey Hess <joeyh@debian.org>
157
158 =cut