1DH_MAKESHLIBS(1)                   Debhelper                  DH_MAKESHLIBS(1)
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NAME

6       dh_makeshlibs - automatically create shlibs file and call
7       dpkg-gensymbols
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SYNOPSIS

10       dh_makeshlibs [debhelper options] [-mmajor] [-V[dependencies]] [-n]
11       [-Xitem] [-- params]
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DESCRIPTION

14       dh_makeshlibs is a debhelper program that automatically scans for
15       shared libraries, and generates a shlibs file for the libraries it
16       finds.
17
18       It will also ensure that ldconfig is invoked during install and removal
19       when it finds shared libraries.  Since debhelper 9.20151004, this is
20       done via a dpkg trigger.  In older versions of debhelper, dh_makeshlibs
21       would generate a maintainer script for this purpose.
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23       Since debhelper 12.3, dh_makeshlibs will by default add an additional
24       udeb line for udebs in the shlibs file, when the udeb has the same name
25       as the deb followed by a "-udeb" suffix (e.g. if the deb is called
26       "libfoo1", then debhelper will auto-detect the udeb if it is named
27       "libfoo1-udeb"). Please use the --add-udeb and --no-add-udeb options
28       below when this auto-detection is insufficient.
29
30       If you previously used --add-udeb and are considering to migrate to
31       using the new auto-detection feature in 12.3, then please remember to
32       test that the resulting DEBIAN/shlibs files are as expected.  There are
33       some known corner cases, where the auto-detection is insufficient.
34       These include when the udeb contains library files from multiple
35       regular deb packages or when the packages do not follow the expected
36       naming convention.
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FILES

39       debian/package.shlibs
40           Installs this file, if present, into the package as DEBIAN/shlibs.
41           If omitted, debhelper will generate a shlibs file automatically if
42           it detects any libraries.
43
44           Note in compat levels 9 and earlier, this file was installed by
45           dh_installdeb(1) rather than dh_makeshlibs.
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47       debian/package.symbols
48       debian/package.symbols.arch
49           These symbols files, if present, are passed to dpkg-gensymbols(1)
50           to be processed and installed. Use the arch specific names if you
51           need to provide different symbols files for different
52           architectures.
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OPTIONS

55       -mmajor, --major=major
56           Instead of trying to guess the major number of the library with
57           objdump, use the major number specified after the -m parameter.
58           This is much less useful than it used to be, back in the bad old
59           days when this program looked at library filenames rather than
60           using objdump.
61
62       -V, -Vdependencies
63       --version-info, --version-info=dependencies
64           If a shlibs file is generated by this program, this option controls
65           what version will be used in the dependency relation.
66
67           In compat 12 and later, dh_makeshlibs defaults to
68           -VUpstream-Version.  In compat 11 and earlier the default behaved
69           like -VNone.
70
71           The dh_makeshlibs tool can generate dependencies in three variants:
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73           -VUpstream-Version
74               The dependency will be "packagename (>= packageversion)".  Note
75               that Upstream-Version is case-sensitive and must be written
76               exactly as shown here.
77
78               This is a conservative setting that always ensures that other
79               packages' shared library dependencies are at least as tight as
80               they need to be (unless the library is prone to changing ABI
81               without updating the upstream version number).
82
83               The flip side is that packages might end up with dependencies
84               that are too tight in some cases (note a symbols file can
85               mitigate this issue).  This is often of minor temporary
86               inconvenience and usually a lot better than the fall out caused
87               by forgetting to bump the dependency information.
88
89               This explicit form was added in debhelper/11.3.  In previous
90               versions, a -V without any dependency information was used
91               instead (and that form still works)
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93           -VNone
94               The dependency will be "packagename".  Note that None is case-
95               sensitive and must be written exactly as shown here.
96
97               This form is generally unsafe with the only exception being if
98               upstream does not extend the ABI in any way.  However, most
99               upstreams improve their interfaces over time and packagers are
100               recommended to use -VUpstream-Version (or one of the other
101               forms of -Vdependencies).
102
103               Alternatively, this may be sufficient if (and only if) the
104               package uses symbol versioning (see dpkg-gensymbols(1)) and
105               does not build any udeb packages.  Note that symbols are not
106               supported for udeb packages, which solely relies on shlibs for
107               dependency handling.
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109           -Vpackage-relation
110               In this case, the value passed to -V will be used as a
111               dependency relation.  The package-relation should generally be
112               of the form "some-package-name (>= some-package-version)".
113               Remember to include the package name.
114
115               Note that debhelper will use the value as it is with no sanity
116               checking or modification.  In rare special cases, this is
117               needed to generate a dependency on a different package than the
118               one containing the library.
119
120           When choosing a value for this option, please keep mind that if the
121           package provides a symbols file, then that this is generally
122           preferred over the shlibs file for regular .deb packages.  See
123           dpkg-shlibdeps(1) for more information on this topic.
124
125       -n, --no-scripts
126           Do not add the "ldconfig" trigger even if it seems like the package
127           might need it.  The option is called --no-scripts for historical
128           reasons as dh_makeshlibs would previously generate maintainer
129           scripts that called ldconfig.
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131       -Xitem, --exclude=item
132           Exclude files that contain item anywhere in their filename or
133           directory from being treated as shared libraries.
134
135       --add-udeb=udeb
136           Create an additional line for udebs in the shlibs file and use udeb
137           as the package name for udebs to depend on instead of the regular
138           library package.
139
140           This option is only useful for special cases such as when debhelper
141           cannot auto-detect package name of the udeb package, when the udeb
142           will contain libraries from multiple deb packages, or when the udeb
143           contains libraries not present in the deb package.
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145       --no-add-udeb
146           Do not add any udeb lines to the shlibs file.  This can be used to
147           disable the default auto-detection of udebs.
148
149           This may be useful in case you do not want a shlibs file at all for
150           the udeb because no package will depend on it.  E.g. because adding
151           a udeb package for the library was "overkill" and the library is
152           embedded in a different udeb package.
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154       -- params
155           Pass params to dpkg-gensymbols(1).
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EXAMPLES

158       dh_makeshlibs -VNone
159           Assuming this is a package named libfoobar1, generates a shlibs
160           file that looks something like:
161            libfoobar 1 libfoobar1
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163       dh_makeshlibs -VUpstream-Version
164           Assuming the current version of the package is 1.1-3, generates a
165           shlibs file that looks something like:
166            libfoobar 1 libfoobar1 (>= 1.1)
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168       dh_makeshlibs -V 'libfoobar1 (>= 1.0)'
169           Generates a shlibs file that looks something like:
170             libfoobar 1 libfoobar1 (>= 1.0)
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SEE ALSO

173       debhelper(7)
174
175       This program is a part of debhelper.
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AUTHOR

178       Joey Hess <joeyh@debian.org>
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18213.5.2                            2021-11-02                  DH_MAKESHLIBS(1)
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