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dh_shlibdeps: run dpkg-shlibdeps on OCaml's *.cmxs files
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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(options => {
89         "L|libpackage=s" => \$dh{LIBPACKAGE},
90         "dpkg-shlibdeps-params=s", => \$dh{U_PARAMS},
91         "l=s", => \$dh{L_PARAMS},
92 });
93
94 if ($dh{L_PARAMS}) {
95         my @paths=();
96         # Add to existing paths, if set.
97         push @paths, $ENV{'LD_LIBRARY_PATH'}
98                 if exists $ENV{'LD_LIBRARY_PATH'};
99         foreach (split(/:/, $dh{L_PARAMS})) {
100                 # Force the path absolute.
101                 if (m:^/:) {
102                         push @paths, $_;
103                 }
104                 else {
105                         push @paths, "/$_";
106                 }
107         }
108         $dh{L_PARAMS}=join(':', @paths);
109 }
110
111 foreach my $package (@{$dh{DOPACKAGES}}) {
112         my $tmp=tmpdir($package);
113         my $ext=pkgext($package);
114
115         my @filelist;
116         my $ff;
117
118         # Generate a list of ELF binaries in the package, ignoring any
119         # we were told to exclude.
120         my $find_options='';
121         if (defined($dh{EXCLUDE_FIND}) && $dh{EXCLUDE_FIND} ne '') {
122                 $find_options="! \\( $dh{EXCLUDE_FIND} \\)";
123         }
124         foreach my $file (split(/\n/,`find $tmp -type f \\( -perm +111 -or -name "*.so*" -or -name "*.cmxs" \\) $find_options -print`)) {
125                 # Prune directories that contain separated debug symbols.
126                 next if $file=~m!^\Q$tmp\E/usr/lib/debug/(lib|lib64|usr|bin|sbin|opt|dev|emul)/!;
127                 # TODO this is slow, optimize. Ie, file can run once on
128                 # multiple files..
129                 $ff=`file "$file"`;
130                 if ($ff=~m/ELF/ && $ff!~/statically linked/) {
131                         push @filelist,$file;
132                 }
133         }
134
135         if (@filelist) {
136                 my @opts;
137                 if (defined $dh{LIBPACKAGE} && length $dh{LIBPACKAGE}) {
138                         @opts=("-S".tmpdir($dh{LIBPACKAGE}));
139                 }
140                 
141                 push @opts, "-tudeb" if is_udeb($package);
142                 
143                 my $ld_library_path_orig=$ENV{LD_LIBRARY_PATH};
144                 if ($dh{L_PARAMS}) {
145                         $ENV{LD_LIBRARY_PATH}=$dh{L_PARAMS};
146                         verbose_print("LD_LIBRARY_PATH=$dh{L_PARAMS}");
147                 }
148                 
149                 doit("dpkg-shlibdeps","-Tdebian/${ext}substvars",
150                         @opts,@{$dh{U_PARAMS}},@filelist);
151
152                 if ($dh{L_PARAMS}) {
153                         if (defined $ld_library_path_orig) {
154                                 $ENV{LD_LIBRARY_PATH}=$ld_library_path_orig;
155                         }
156                         else {
157                                 delete $ENV{LD_LIBRARY_PATH};
158                         }
159                 }
160         }
161 }
162
163 =head1 SEE ALSO
164
165 L<debhelper(7)>, L<dpkg-shlibdeps(1)>
166
167 This program is a part of debhelper.
168
169 =head1 AUTHOR
170
171 Joey Hess <joeyh@debian.org>
172
173 =cut