dh_makeshlibs - automatically create shlibs file and call dpkg-gensymbols
dh_makeshlibs [
debhelper options] [
-mmajor]
[
-V[dependencies]] [
-n] [
-Xitem]
[
-- params]
dh_makeshlibs is a debhelper program that automatically scans for shared
libraries, and generates a shlibs file for the libraries it finds.
It will also ensure that ldconfig is invoked during install and removal when it
finds shared libraries. Since debhelper 9.20151004, this is done via a dpkg
trigger. In older versions of debhelper,
dh_makeshlibs would generate a
maintainer script for this purpose.
Since debhelper 12.3,
dh_makeshlibs will by default add an additional
udeb line for udebs in the shlibs file, when the udeb has the same name
as the deb followed by a "-udeb" suffix (e.g. if the deb is called
"libfoo1", then debhelper will auto-detect the udeb if it is named
"libfoo1-udeb"). Please use the
--add-udeb and
--no-add-udeb options below when this auto-detection is insufficient.
If you previously used
--add-udeb and are considering to migrate to using
the new auto-detection feature in 12.3, then please remember to test that the
resulting
DEBIAN/shlibs files are as expected. There are some known
corner cases, where the auto-detection is insufficient. These include when the
udeb contains library files from multiple regular deb packages or when the
packages do not follow the expected naming convention.
- debian/package.shlibs
- Installs this file, if present, into the package as
DEBIAN/shlibs. If omitted, debhelper will generate a shlibs file
automatically if it detects any libraries.
Note in compat levels 9 and earlier, this file was installed by
dh_installdeb(1) rather than dh_makeshlibs.
- debian/package.symbols
- debian/package.symbols.arch
- These symbols files, if present, are passed to
dpkg-gensymbols(1) to be processed and installed. Use the
arch specific names if you need to provide different symbols files
for different architectures.
-
-mmajor, --major=major
- Instead of trying to guess the major number of the library
with objdump, use the major number specified after the -m parameter. This
is much less useful than it used to be, back in the bad old days when this
program looked at library filenames rather than using objdump.
-
-V, -Vdependencies
-
--version-info,
--version-info=dependencies
- If a shlibs file is generated by this program, this option
controls what version will be used in the dependency relation.
In compat 12 and later, dh_makeshlibs defaults to
-VUpstream-Version. In compat 11 and earlier the default behaved
like -VNone.
The dh_makeshlibs tool can generate dependencies in three
variants:
- -VUpstream-Version
- The dependency will be "packagename
(>= packageversion)". Note that
Upstream-Version is case-sensitive and must be written exactly as
shown here.
This is a conservative setting that always ensures that other packages'
shared library dependencies are at least as tight as they need to be
(unless the library is prone to changing ABI without updating the upstream
version number).
The flip side is that packages might end up with dependencies that are too
tight in some cases (note a symbols file can mitigate this issue). This is
often of minor temporary inconvenience and usually a lot better than the
fall out caused by forgetting to bump the dependency information.
This explicit form was added in debhelper/11.3. In previous versions, a
-V without any dependency information was used instead (and that
form still works)
- -VNone
- The dependency will be "packagename". Note
that None is case-sensitive and must be written exactly as shown
here.
This form is generally unsafe with the only exception being if upstream does
not extend the ABI in any way. However, most upstreams improve their
interfaces over time and packagers are recommended to use
-VUpstream-Version (or one of the other forms of
-Vdependencies).
Alternatively, this may be sufficient if (and only if) the package uses
symbol versioning (see dpkg-gensymbols(1)) and does not
build any udeb packages. Note that symbols are not supported for udeb
packages, which solely relies on shlibs for dependency handling.
-
-Vpackage-relation
- In this case, the value passed to -V will be used as
a dependency relation. The package-relation should generally be of
the form " some-package-name (>=
some-package-version )". Remember to include the
package name.
Note that debhelper will use the value as it is with no sanity
checking or modification. In rare special cases, this is needed to
generate a dependency on a different package than the one containing the
library.
When choosing a value for this option, please keep mind that if the package
provides a symbols file, then that this is generally preferred over the shlibs
file for regular .deb packages. See
dpkg-shlibdeps(1) for more
information on this topic.
-
-n, --no-scripts
- Do not add the "ldconfig" trigger even if it
seems like the package might need it. The option is called
--no-scripts for historical reasons as dh_makeshlibs would
previously generate maintainer scripts that called ldconfig.
-
-Xitem, --exclude=item
- Exclude files that contain item anywhere in their
filename or directory from being treated as shared libraries.
-
--add-udeb=udeb
- Create an additional line for udebs in the shlibs file and
use udeb as the package name for udebs to depend on instead of the
regular library package.
This option is only useful for special cases such as when debhelper cannot
auto-detect package name of the udeb package, when the udeb will contain
libraries from multiple deb packages, or when the udeb contains libraries
not present in the deb package.
- --no-add-udeb
- Do not add any udeb lines to the shlibs file. This can be
used to disable the default auto-detection of udebs.
This may be useful in case you do not want a shlibs file at all for the udeb
because no package will depend on it. E.g. because adding a udeb package
for the library was "overkill" and the library is embedded in a
different udeb package.
-
-- params
- Pass params to dpkg-gensymbols(1).
- dh_makeshlibs -VNone
- Assuming this is a package named libfoobar1,
generates a shlibs file that looks something like:
libfoobar 1 libfoobar1
- dh_makeshlibs -VUpstream-Version
- Assuming the current version of the package is 1.1-3,
generates a shlibs file that looks something like:
libfoobar 1 libfoobar1 (>= 1.1)
- dh_makeshlibs -V 'libfoobar1 (>= 1.0)'
- Generates a shlibs file that looks something like:
libfoobar 1 libfoobar1 (>= 1.0)
debhelper(7)
This program is a part of debhelper.
Joey Hess <
[email protected]>