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NAME | INVOCATION | ENVIRONMENT | OPTIONS | RETURN VALUE | USE CASES | AUTHOR | COPYRIGHT | COLOPHON |
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FEDABIPKGDIFF(1) Libabigail FEDABIPKGDIFF(1)
fedabipkgdiff - compare ABIs of Fedora packages
fedabipkgdiff compares the ABI of shared libraries in ]8;;https://getfedora.org\Fedora]8;;\
packages. It's a convenient way to do so without having to
manually download packages from the ]8;;http://koji.fedoraproject.org/koji\Fedora Build System]8;;\.
fedabipkgdiff knows how to talk with the ]8;;http://koji.fedoraproject.org/koji\Fedora Build System]8;;\ to
find the right packages versions, their associated debug
information and development packages, download them, compare their
ABI locally, and report about the possible ABI changes.
Note that by default, this tool reports ABI changes about types
that are defined in public header files found in the development
packages associated with the packages being compared. It also
reports ABI changes about functions and global variables whose
symbols are defined and exported in the ELF binaries found in the
packages being compared.
fedabipkgdiff [option] <NVR> ...
fedabipkgdiff loads two default suppression specifications files,
merges their content and use it to filter out ABI change reports
that might be considered as false positives to users.
• Default system-wide suppression specification file
It's located by the optional environment variable
LIBABIGAIL_DEFAULT_SYSTEM_SUPPRESSION_FILE. If that environment
variable is not set, then fedabipkgdiff tries to load the
suppression file $libdir/libabigail/libabigail-default.abignore.
If that file is not present, then no default system-wide
suppression specification file is loaded.
• Default user suppression specification file.
It's located by the optional environment
LIBABIGAIL_DEFAULT_USER_SUPPRESSION_FILE. If that environment
variable is not set, then fedabipkgdiff tries to load the
suppression file $HOME/.abignore. If that file is not present,
then no default user suppression specification is loaded.
• --abipkgdiff <path/to/abipkgdiff>
Specify an alternative abipkgdiff instead of the one
installed in system.
• --all-subpackages
Instructs the tool to also compare the ABI of the binaries in
the sub-packages of the packages specified.
• --clean-cache
If you want to clean cache both before and after ABI
comparison, --clean-cache is the convenient way for you to
save typing of two options at same time.
• --clean-cache-after
Clean cache after ABI comparison.
• --clean-cache-before
Clean cache before ABI comparison.
• --debug
Emit debugging messages about the execution of the program.
Details about each method invocation, including input
parameters and returned values, are emitted.
• --dry-run
Don't actually perform the ABI comparison. Details about
what is going to be done are emitted on standard output.
• --dso-only
Compares the ABI of shared libraries only. If this option is
not provided, the tool compares the ABI of all ELF binaries
found in the packages.
• --from <distro>
Specifies the name of the baseline ]8;;https://getfedora.org\Fedora]8;;\ distribution in
which to find the first build that is used for comparison.
The distro value can be any valid value of the RPM macro
%{?dist} for ]8;;https://getfedora.org\Fedora]8;;\, for example, fc4, fc23, fc25.
• --help | -h
Display a short help about the command and exit.
• --no-default-suppression
Do not load the default suppression specification files.
• --no-devel-pkg
Do not take associated development packages into account when
performing the ABI comparison. This makes the tool report
ABI changes about all types that are reachable from functions
and global variables which symbols are defined and publicly
exported in the binaries being compared, even if those types
are not defined in public header files available from the
packages being compared.
• --private-dso
Compare the ABI of shared libraries that are private to the
packages. If this option is not provided, shared libraries
that are private to the packages being considered are not
compared.
• --server <URL>
Specifies the URL of the ]8;;https://fedoraproject.org/wiki/Koji\Koji]8;;\ XMLRPC service the tool talks
to. The default value of this option is ]8;;http://koji.fedoraproject.org/kojihub\‐
http://koji.fedoraproject.org/kojihub ]8;;\.
• --show-identical-binaries
Show the names of the all binaries compared, including the
binaries whose ABI compare equal. By default, when this
option is not provided, only binaries with ABI changes are
mentionned in the output.
• --suppressions <path-to-suppresions>
Use a suppression specification file located at
path-to-suppressions.
• --to <distro>
Specifies the name of the ]8;;https://getfedora.org\Fedora]8;;\ distribution in which to
find the build that is compared against the baseline
specified by option --from. The distro value could be any
valid value of the RPM macro %{?dist} for ]8;;https://getfedora.org\Fedora]8;;\, for
example, fc4, fc23.
• --topurl <URL>
Specifies the URL of the package store the tool downloads
RPMs from. The default value of this option is ]8;;https://kojipkgs.fedoraproject.org\‐
https://kojipkgs.fedoraproject.org ]8;;\.
• --traceback
Show traceback when an exception raised. This is useful for
developers of the tool itself to know more exceptional
errors.
Note that a build is a specific version and release of an RPM
package. It's specified by its the package name, version and
release. These are specified by the ]8;;https://fedoraproject.org/wiki/Packaging:NamingGuidelines\Fedora Naming Guidelines]8;;\
The exit code of the abipkgdiff command is either 0 if the ABI of
the binaries compared are equivalent, or non-zero if they differ
or if the tool encountered an error.
In the later case, the value of the exit code is the same as for
the abidiff tool.
Below are some usage examples currently supported by
fedabipkgdiff.
1. Compare the ABI of binaries in a local package against the
ABI of the latest stable package in ]8;;https://getfedora.org\Fedora]8;;\ 23.
Suppose you have built just built the httpd package and you
want to compare the ABI of the binaries in this locally
built package against the ABI of the binaries in the latest
http build from ]8;;https://getfedora.org\Fedora]8;;\ 23. The command line invocation
would be:
$ fedabipkgdiff --from fc23 ./httpd-2.4.18-2.fc24.x86_64.rpm
2. Compare the ABI of binaries in two local packages.
Suppose you have built two versions of package httpd, and
you want to see what ABI differences between these two
versions of RPM files. The command line invocation would be:
$ fedabipkgdiff path/to/httpd-2.4.23-3.fc23.x86_64.rpm another/path/to/httpd-2.4.23-4.fc24.x86_64.rpm
All what fedabipkgdiff does happens on local machine without
the need of querying or downloading RPMs from Koji.
3. Compare the ABI of binaries in the latest build of the httpd
package in Fedora 23 against the ABI of the binaries in the
latest build of the same package in 24.
In this case, note that neither of the two packages are
available locally. The tool is going to talk with the ]8;;http://koji.fedoraproject.org/koji\‐
Fedora Build System]8;;\, determine what the versions and
releases of the latest packages are, download them and
perform the comparison locally. The command line invocation
would be:
$ fedabipkgdiff --from fc23 --to fc24 httpd
4. Compare the ABI of binaries of two builds of the httpd
package, designated their versions and releases.
If we want to do perform the ABI comparison for all the
processor architectures supported by ]8;;https://getfedora.org\Fedora]8;;\ the command line
invocation would be:
$ fedabipkgdiff httpd-2.8.14.fc23 httpd-2.8.14.fc24
But if we want to perform the ABI comparison for a specific
architecture, say, x86_64, then the command line invocation
would be:
$ fedabipkgdiff httpd-2.8.14.fc23.x86_64 httpd-2.8.14.fc24.x86_64
5. If the use wants to also compare the sub-packages of a given
package, she can use the --all-subpackages option. The
first command of the previous example would thus look like:
$ fedabipkgdiff --all-subpackages httpd-2.8.14.fc23 httpd-2.8.14.fc24
Chenxiong Qi
2014-2025, Red Hat, Inc.
This page is part of the libabigail (ABI Generic Analysis and
Instrumentation Library) project. Information about the project
can be found at ⟨https://sourceware.org/libabigail/⟩. If you have
a bug report for this manual page, see
⟨http://sourceware.org/bugzilla/enter_bug.cgi?product=libabigail⟩.
This page was obtained from the project's upstream Git repository
⟨git://sourceware.org/git/libabigail.git⟩ on 2025-08-11. (At that
time, the date of the most recent commit that was found in the
repository was 2025-07-28.) If you discover any rendering
problems in this HTML version of the page, or you believe there is
a better or more up-to-date source for the page, or you have
corrections or improvements to the information in this COLOPHON
(which is not part of the original manual page), send a mail to
[email protected]
Aug 11, 2025 FEDABIPKGDIFF(1)
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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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