CPack DEB Generator

CPack DEB Generator

The built in (binary) CPack DEB generator (Unix only)

Variables specific to CPack Debian (DEB) generator ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

The CPack DEB generator may be used to create DEB package using :module:CPack. The CPack DEB generator is a :module:CPack generator thus it uses the :variable:!CPACK_XXX variables used by :module:CPack.

The CPack DEB generator should work on any Linux host but it will produce better deb package when Debian specific tools dpkg-xxx are usable on the build system.

The CPack DEB generator has specific features which are controlled by the specifics :variable:!CPACK_DEBIAN_XXX variables.

:variable:!CPACK_DEBIAN_<COMPONENT>_XXXX variables may be used in order to have component specific values. Note however that <COMPONENT> refers to the grouping name written in upper case. It may be either a component name or a component GROUP name.

Here are some CPack DEB generator wiki resources that are here for historic reasons and are no longer maintained but may still prove useful:

• https://gitlab.kitware.com/cmake/community/-/wikis/doc/cpack/Configuration
• https://gitlab.kitware.com/cmake/community/-/wikis/doc/cpack/PackageGenerators#deb-unix-only

List of CPack DEB generator specific variables:

.. variable:: CPACK_DEB_COMPONENT_INSTALL

Enable component packaging for CPackDEB

:Mandatory: No :Default: OFF

If enabled (ON) multiple packages are generated. By default a single package containing files of all components is generated.

.. variable:: CPACK_DEBIAN_PACKAGE_NAME CPACK_DEBIAN_<COMPONENT>_PACKAGE_NAME

Set Package control field (variable is automatically transformed to lower case).

:Mandatory: Yes :Default:

• :variable:CPACK_PACKAGE_NAME for non-component based installations
• :variable:CPACK_DEBIAN_PACKAGE_NAME suffixed with -<COMPONENT> for component-based installations.

.. versionadded:: 3.5 Per-component :variable:!CPACK_DEBIAN_<COMPONENT>_PACKAGE_NAME variables.

See https://www.debian.org/doc/debian-policy/ch-controlfields.html#s-f-source

.. variable:: CPACK_DEBIAN_FILE_NAME CPACK_DEBIAN_<COMPONENT>_FILE_NAME

.. versionadded:: 3.6

Package file name.

:Mandatory: Yes :Default: <CPACK_PACKAGE_FILE_NAME>[-<component>].deb

This may be set to:

DEB-DEFAULT Tell CPack to automatically generate the package file name in deb format::

 <PackageName>_<VersionNumber>-<DebianRevisionNumber>_<DebianArchitecture>.deb

This setting recommended as the preferred behavior, but for backward compatibility with the CPack DEB generator in CMake prior to version 3.6, this is not the default. Without this, duplicate names may occur. Duplicate files get overwritten and it is up to the packager to set the variables in a manner that will prevent such errors.

<file-name>[.deb] Use the given file name.

.. versionchanged:: 3.29

 The ``.deb`` suffix will be automatically added if the file name does
 not end in ``.deb`` or ``.ipk``.  Previously the suffix was required.

<file-name>.ipk .. versionadded:: 3.10

Use the given file name. The .ipk suffix is used by the OPKG packaging system.

.. variable:: CPACK_DEBIAN_PACKAGE_EPOCH

.. versionadded:: 3.10

The Debian package epoch

:Mandatory: No :Default: None

Optional number that should be incremented when changing versioning schemas or fixing mistakes in the version numbers of older packages.

.. variable:: CPACK_DEBIAN_PACKAGE_VERSION

The Debian package version

:Mandatory: Yes :Default: :variable:CPACK_PACKAGE_VERSION

This variable may contain only alphanumerics (A-Za-z0-9) and the characters . + - ~ (full stop, plus, hyphen, tilde) and should start with a digit. If :variable:CPACK_DEBIAN_PACKAGE_RELEASE is not set then hyphens are not allowed.

.. note::

For backward compatibility with CMake 3.9 and lower a failed test of this variable's content is not a hard error when both :variable:CPACK_DEBIAN_PACKAGE_RELEASE and :variable:CPACK_DEBIAN_PACKAGE_EPOCH variables are not set. An author warning is reported instead.

.. variable:: CPACK_DEBIAN_PACKAGE_RELEASE

.. versionadded:: 3.6

The Debian package release - Debian revision number.

:Mandatory: No :Default: None

This is the numbering of the DEB package itself, i.e. the version of the packaging and not the version of the content (see :variable:CPACK_DEBIAN_PACKAGE_VERSION). One may change the default value if the previous packaging was buggy and/or you want to put here a fancy Linux distro specific numbering.

.. variable:: CPACK_DEBIAN_PACKAGE_ARCHITECTURE CPACK_DEBIAN_<COMPONENT>_PACKAGE_ARCHITECTURE

The Debian package architecture

:Mandatory: Yes :Default: Output of dpkg --print-architecture (or i386 if dpkg is not found)

.. versionadded:: 3.6 Per-component :variable:!CPACK_DEBIAN_<COMPONENT>_PACKAGE_ARCHITECTURE variables.

.. variable:: CPACK_DEBIAN_PACKAGE_DEPENDS CPACK_DEBIAN_<COMPONENT>_PACKAGE_DEPENDS

Sets the Debian dependencies of this package.

:Mandatory: No :Default:

• An empty string for non-component based installations
• :variable:CPACK_DEBIAN_PACKAGE_DEPENDS for component-based installations.

.. versionadded:: 3.3 Per-component :variable:!CPACK_DEBIAN_<COMPONENT>_PACKAGE_DEPENDS variables.

.. note::

If :variable:CPACK_DEBIAN_PACKAGE_SHLIBDEPS or more specifically :variable:CPACK_DEBIAN_<COMPONENT>_PACKAGE_SHLIBDEPS is set for this component, the discovered dependencies will be appended to :variable:CPACK_DEBIAN_<COMPONENT>_PACKAGE_DEPENDS instead of :variable:CPACK_DEBIAN_PACKAGE_DEPENDS. If :variable:CPACK_DEBIAN_<COMPONENT>_PACKAGE_DEPENDS is an empty string, only the automatically discovered dependencies will be set for this component.

.. versionchanged:: 3.31

The variable is always expanded as a list. Before it was expanded only if used in cooperation with :variable:CPACK_DEB_COMPONENT_INSTALL, :variable:CPACK_DEBIAN_PACKAGE_SHLIBDEPS or :variable:CPACK_DEBIAN_<COMPONENT>_PACKAGE_SHLIBDEPS. This meant that if a component had no shared libraries discovered (e.g. a package composed only of scripts) you had to join the list by yourself to obtain a valid Depends field.

Example:

.. code-block:: cmake

set(CPACK_DEBIAN_PACKAGE_DEPENDS "libc6 (>= 2.3.1-6), libc6 (< 2.4)") list(APPEND CPACK_DEBIAN_PACKAGE_DEPENDS cmake)

.. variable:: CPACK_DEBIAN_ENABLE_COMPONENT_DEPENDS

.. versionadded:: 3.6

Sets inter-component dependencies if listed with :variable:CPACK_COMPONENT_<compName>_DEPENDS variables.

:Mandatory: No :Default: None

.. variable:: CPACK_DEBIAN_PACKAGE_MAINTAINER

The Debian package maintainer

:Mandatory: Yes :Default: :variable:!CPACK_PACKAGE_CONTACT

.. variable:: CPACK_DEBIAN_PACKAGE_DESCRIPTION CPACK_DEBIAN_<COMPONENT>_DESCRIPTION

The Debian package description

:Mandatory: Yes :Default:

• :variable:CPACK_DEBIAN_<COMPONENT>_DESCRIPTION (component based installers only) if set, or :variable:CPACK_DEBIAN_PACKAGE_DESCRIPTION if set, or
• :variable:CPACK_COMPONENT_<compName>_DESCRIPTION (component based installers only) if set, or :variable:CPACK_PACKAGE_DESCRIPTION if set, or
• content of the file specified in :variable:CPACK_PACKAGE_DESCRIPTION_FILE if set

If after that description is not set, :variable:CPACK_PACKAGE_DESCRIPTION_SUMMARY going to be used if set. Otherwise, :variable:CPACK_PACKAGE_DESCRIPTION_SUMMARY will be added as the first line of description as defined in Debian Policy Manual_.

.. versionadded:: 3.3 Per-component :variable:!CPACK_COMPONENT_<compName>_DESCRIPTION variables.

.. versionadded:: 3.16 Per-component :variable:!CPACK_DEBIAN_<COMPONENT>_DESCRIPTION variables.

.. versionadded:: 3.16 The :variable:!CPACK_PACKAGE_DESCRIPTION_FILE variable.

.. _Debian Policy Manual: https://www.debian.org/doc/debian-policy/ch-controlfields.html#description

.. variable:: CPACK_DEBIAN_PACKAGE_SECTION CPACK_DEBIAN_<COMPONENT>_PACKAGE_SECTION

Set Section control field e.g. admin, devel, doc, ...

:Mandatory: Yes :Default: devel

.. versionadded:: 3.5 Per-component :variable:!CPACK_DEBIAN_<COMPONENT>_PACKAGE_SECTION variables.

See https://www.debian.org/doc/debian-policy/ch-archive.html#s-subsections

.. variable:: CPACK_DEBIAN_ARCHIVE_TYPE

.. versionadded:: 3.7

.. deprecated:: 3.14

The archive format used for creating the Debian package.

:Mandatory: Yes :Default: gnutar

Possible value is: gnutar

.. note::

This variable previously defaulted to the paxr value, but dpkg has never supported that tar format. For backwards compatibility the paxr value will be mapped to gnutar and a deprecation message will be emitted.

.. variable:: CPACK_DEBIAN_COMPRESSION_TYPE

.. versionadded:: 3.1

The compression used for creating the Debian package.

:Mandatory: Yes :Default: gzip

Possible values are:

lzma Lempel–Ziv–Markov chain algorithm

xz XZ Utils LZMA2 (Lempel–Ziv–Markov chain algorithm, version 2) compression

bzip2 bzip2 Burrows–Wheeler algorithm

gzip GNU Gzip Deflate compression

zstd .. versionadded:: 3.22

Zstandard compression

.. variable:: CPACK_DEBIAN_COMPRESSION_LEVEL

.. versionadded:: 4.3

The compression level used for creating the Debian package.

:Mandatory: No :Default: value of :variable:CPACK_COMPRESSION_LEVEL

This variable allows fine-tuning of the compression ratio and speed for the Debian package archive. It controls the numeric compression level passed to the compressor defined by :variable:CPACK_DEBIAN_COMPRESSION_TYPE. If CPACK_DEBIAN_COMPRESSION_LEVEL is not set, or is set to 0, the default value will be used.

The valid range and interpretation depend on the selected compression type:

• gzip – level 1–9
• bzip2 – level 1–9
• xz – level 1–9
• lzma – level 1–9
• zstd – level 1–19

Example usage:

.. code-block:: cmake

set(CPACK_DEBIAN_COMPRESSION_TYPE "xz") set(CPACK_DEBIAN_COMPRESSION_LEVEL 9)

include(CPack)

.. variable:: CPACK_DEBIAN_PACKAGE_PRIORITY CPACK_DEBIAN_<COMPONENT>_PACKAGE_PRIORITY

Set Priority control field e.g. required, important, standard, optional, extra

:Mandatory: Yes :Default: optional

.. versionadded:: 3.5 Per-component :variable:!CPACK_DEBIAN_<COMPONENT>_PACKAGE_PRIORITY variables.

See https://www.debian.org/doc/debian-policy/ch-archive.html#s-priorities

.. variable:: CPACK_DEBIAN_PACKAGE_HOMEPAGE

The URL of the web site for this package, preferably (when applicable) the site from which the original source can be obtained and any additional upstream documentation or information may be found.

:Mandatory: No :Default: :variable:CMAKE_PROJECT_HOMEPAGE_URL

.. versionadded:: 3.12 The :variable:!CMAKE_PROJECT_HOMEPAGE_URL variable.

.. note::

The content of this field is a simple URL without any surrounding characters such as <>.

.. variable:: CPACK_DEBIAN_PACKAGE_SHLIBDEPS CPACK_DEBIAN_<COMPONENT>_PACKAGE_SHLIBDEPS

May be set to ON in order to use dpkg-shlibdeps to generate better package dependency list.

:Mandatory: No :Default:

• :variable:CPACK_DEBIAN_PACKAGE_SHLIBDEPS if set or
• OFF

.. note::

You may need set :variable:CMAKE_INSTALL_RPATH to an appropriate value if you use this feature, because if you don't dpkg-shlibdeps may fail to find your own shared libs. See https://gitlab.kitware.com/cmake/community/-/wikis/doc/cmake/RPATH-handling

.. note::

You can also set :variable:CPACK_DEBIAN_PACKAGE_SHLIBDEPS_PRIVATE_DIRS to an appropriate value if you use this feature, in order to please dpkg-shlibdeps. However, you should only do this for private shared libraries that could not get resolved otherwise.

.. versionadded:: 3.3 Per-component :variable:!CPACK_DEBIAN_<COMPONENT>_PACKAGE_SHLIBDEPS variables.

.. versionadded:: 3.6 Correct handling of $ORIGIN in :variable:CMAKE_INSTALL_RPATH.

.. variable:: CPACK_DEBIAN_PACKAGE_SHLIBDEPS_PRIVATE_DIRS

.. versionadded:: 3.20

May be set to a list of directories that will be given to dpkg-shlibdeps via its -l option. These will be searched by dpkg-shlibdeps in order to find private shared library dependencies.

:Mandatory: No :Default: None

.. note::

You should prefer to set :variable:CMAKE_INSTALL_RPATH to an appropriate value if you use dpkg-shlibdeps. The current option is really only needed for private shared library dependencies.

.. variable:: CPACK_DEBIAN_PACKAGE_DEBUG

May be set when invoking cpack in order to trace debug information during the CPack DEB generator run.

:Mandatory: No :Default: None

.. variable:: CPACK_DEBIAN_PACKAGE_PREDEPENDS CPACK_DEBIAN_<COMPONENT>_PACKAGE_PREDEPENDS

Sets the Pre-Depends field of the Debian package. Like :variable:Depends <CPACK_DEBIAN_PACKAGE_DEPENDS>, except that it also forces dpkg to complete installation of the packages named before even starting the installation of the package which declares the pre-dependency.

:Mandatory: No :Default:

• An empty string for non-component based installations
• :variable:CPACK_DEBIAN_PACKAGE_PREDEPENDS for component-based installations.

.. versionadded:: 3.4 Per-component :variable:!CPACK_DEBIAN_<COMPONENT>_PACKAGE_PREDEPENDS variables.

See https://www.debian.org/doc/debian-policy/ch-relationships.html#s-binarydeps

.. variable:: CPACK_DEBIAN_PACKAGE_ENHANCES CPACK_DEBIAN_<COMPONENT>_PACKAGE_ENHANCES

Sets the Enhances field of the Debian package. Similar to :variable:Suggests <CPACK_DEBIAN_PACKAGE_SUGGESTS> but works in the opposite direction: declares that a package can enhance the functionality of another package.

:Mandatory: No :Default:

• An empty string for non-component based installations
• :variable:CPACK_DEBIAN_PACKAGE_ENHANCES for component-based installations.

.. versionadded:: 3.4 Per-component :variable:!CPACK_DEBIAN_<COMPONENT>_PACKAGE_ENHANCES variables.

See https://www.debian.org/doc/debian-policy/ch-relationships.html#s-binarydeps

.. variable:: CPACK_DEBIAN_PACKAGE_BREAKS CPACK_DEBIAN_<COMPONENT>_PACKAGE_BREAKS

Sets the Breaks field of the Debian package. When a binary package (P) declares that it breaks other packages (B), dpkg will not allow the package (P) which declares Breaks be unpacked unless the packages that will be broken (B) are deconfigured first. As long as the package (P) is configured, the previously deconfigured packages (B) cannot be reconfigured again.

:Mandatory: No :Default:

• An empty string for non-component based installations
• :variable:CPACK_DEBIAN_PACKAGE_BREAKS for component-based installations.

.. versionadded:: 3.4 Per-component :variable:!CPACK_DEBIAN_<COMPONENT>_PACKAGE_BREAKS variables.

See https://www.debian.org/doc/debian-policy/ch-relationships.html#s-breaks

.. variable:: CPACK_DEBIAN_PACKAGE_CONFLICTS CPACK_DEBIAN_<COMPONENT>_PACKAGE_CONFLICTS

Sets the Conflicts field of the Debian package. When one binary package declares a conflict with another using a Conflicts field, dpkg will not allow them to be unpacked on the system at the same time.

:Mandatory: No :Default:

• An empty string for non-component based installations
• :variable:CPACK_DEBIAN_PACKAGE_CONFLICTS for component-based installations.

.. versionadded:: 3.4 Per-component :variable:!CPACK_DEBIAN_<COMPONENT>_PACKAGE_CONFLICTS variables.

See https://www.debian.org/doc/debian-policy/ch-relationships.html#s-conflicts

.. note::

This is a stronger restriction than :variable:Breaks <CPACK_DEBIAN_PACKAGE_BREAKS>, which prevents the broken package from being configured while the breaking package is in the "Unpacked" state but allows both packages to be unpacked at the same time.

.. variable:: CPACK_DEBIAN_PACKAGE_PROVIDES CPACK_DEBIAN_<COMPONENT>_PACKAGE_PROVIDES

Sets the Provides field of the Debian package. A virtual package is one which appears in the Provides control field of another package.

:Mandatory: No :Default:

• An empty string for non-component based installations
• :variable:CPACK_DEBIAN_PACKAGE_PROVIDES for component-based installations.

.. versionadded:: 3.4 Per-component :variable:!CPACK_DEBIAN_<COMPONENT>_PACKAGE_PROVIDES variables.

See https://www.debian.org/doc/debian-policy/ch-relationships.html#s-virtual

.. variable:: CPACK_DEBIAN_PACKAGE_REPLACES CPACK_DEBIAN_<COMPONENT>_PACKAGE_REPLACES

Sets the Replaces field of the Debian package. Packages can declare in their control file that they should overwrite files in certain other packages, or completely replace other packages.

:Mandatory: No :Default:

• An empty string for non-component based installations
• :variable:CPACK_DEBIAN_PACKAGE_REPLACES for component-based installations.

.. versionadded:: 3.4 Per-component :variable:!CPACK_DEBIAN_<COMPONENT>_PACKAGE_REPLACES variables.

See https://www.debian.org/doc/debian-policy/ch-relationships.html#s-binarydeps

.. variable:: CPACK_DEBIAN_PACKAGE_RECOMMENDS CPACK_DEBIAN_<COMPONENT>_PACKAGE_RECOMMENDS

Sets the Recommends field of the Debian package. Allows packages to declare a strong, but not absolute, dependency on other packages.

:Mandatory: No :Default:

• An empty string for non-component based installations
• :variable:CPACK_DEBIAN_PACKAGE_RECOMMENDS for component-based installations.

.. versionadded:: 3.4 Per-component :variable:!CPACK_DEBIAN_<COMPONENT>_PACKAGE_RECOMMENDS variables.

See https://www.debian.org/doc/debian-policy/ch-relationships.html#s-binarydeps

.. variable:: CPACK_DEBIAN_PACKAGE_SUGGESTS CPACK_DEBIAN_<COMPONENT>_PACKAGE_SUGGESTS

Sets the Suggests field of the Debian package. Allows packages to declare a suggested package install grouping.

:Mandatory: No :Default:

• An empty string for non-component based installations
• :variable:CPACK_DEBIAN_PACKAGE_SUGGESTS for component-based installations.

.. versionadded:: 3.4 Per-component :variable:!CPACK_DEBIAN_<COMPONENT>_PACKAGE_SUGGESTS variables.

See https://www.debian.org/doc/debian-policy/ch-relationships.html#s-binarydeps

.. variable:: CPACK_DEBIAN_PACKAGE_GENERATE_SHLIBS

.. versionadded:: 3.6

:Mandatory: No :Default: OFF

Allows to generate shlibs control file automatically. Compatibility is defined by :variable:CPACK_DEBIAN_PACKAGE_GENERATE_SHLIBS_POLICY variable value.

.. note::

Libraries are only considered if they have both library name and version set. This can be done by setting SOVERSION property with :command:set_target_properties command.

.. variable:: CPACK_DEBIAN_PACKAGE_GENERATE_SHLIBS_POLICY

.. versionadded:: 3.6

Compatibility policy for auto-generated shlibs control file.

:Mandatory: No :Default: =

Defines compatibility policy for auto-generated shlibs control file. Possible values: =, >=

See https://www.debian.org/doc/debian-policy/ch-sharedlibs.html#s-sharedlibs-shlibdeps

.. variable:: CPACK_DEBIAN_PACKAGE_CONTROL_EXTRA CPACK_DEBIAN_<COMPONENT>_PACKAGE_CONTROL_EXTRA

This variable allow advanced user to add custom script to the control.tar.gz. Typical usage is for conffiles, postinst, postrm, prerm.

:Mandatory: No :Default: None

Usage:

.. code-block:: cmake

set(CPACK_DEBIAN_PACKAGE_CONTROL_EXTRA "${CMAKE_CURRENT_SOURCE_DIR}/prerm;${CMAKE_CURRENT_SOURCE_DIR}/postrm")

.. versionadded:: 3.4 Per-component :variable:!CPACK_DEBIAN_<COMPONENT>_PACKAGE_CONTROL_EXTRA variables.

.. variable:: CPACK_DEBIAN_PACKAGE_CONTROL_STRICT_PERMISSION CPACK_DEBIAN_<COMPONENT>_PACKAGE_CONTROL_STRICT_PERMISSION

.. versionadded:: 3.4

This variable indicates if the Debian policy on control files should be strictly followed.

:Mandatory: No :Default: FALSE

Usage:

.. code-block:: cmake

set(CPACK_DEBIAN_PACKAGE_CONTROL_STRICT_PERMISSION TRUE)

This overrides the permissions on the original files, following the rules set by Debian policy https://www.debian.org/doc/debian-policy/ch-files.html#s-permissions-owners

.. note::

The original permissions of the files will be used in the final package unless this variable is set to TRUE. In particular, the scripts should have the proper executable flag prior to the generation of the package.

.. variable:: CPACK_DEBIAN_PACKAGE_SOURCE CPACK_DEBIAN_<COMPONENT>_PACKAGE_SOURCE

.. versionadded:: 3.5

Sets the Source field of the binary Debian package. When the binary package name is not the same as the source package name (in particular when several components/binaries are generated from one source) the source from which the binary has been generated should be indicated with the field Source.

:Mandatory: No :Default:

• An empty string for non-component based installations
• :variable:CPACK_DEBIAN_PACKAGE_SOURCE for component-based installations.

See https://www.debian.org/doc/debian-policy/ch-controlfields.html#s-f-source

.. note::

This value is not interpreted. It is possible to pass an optional revision number of the referenced source package as well.

.. variable:: CPACK_DEBIAN_PACKAGE_MULTIARCH CPACK_DEBIAN_<COMPONENT>_PACKAGE_MULTIARCH

Sets the Multi-Arch field of the Debian package. Packages can declare in their control file how they should handle situations, where packages for different architectures are being installed on the same machine.

:Mandatory: No :Default:

• An empty string for non-component based installations
• :variable:CPACK_DEBIAN_PACKAGE_MULTIARCH for component-based installations.

.. versionadded:: 3.31 Per-component :variable:!CPACK_DEBIAN_<COMPONENT>_PACKAGE_MULTIARCH variables.

See https://wiki.debian.org/MultiArch/Hints

.. note::

This value is validated. It must be one of the following values: same, foreign, allowed.

Packaging of debug information ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

.. versionadded:: 3.13

Dbgsym packages contain debug symbols for debugging packaged binaries.

Dbgsym packaging has its own set of variables:

.. variable:: CPACK_DEBIAN_DEBUGINFO_PACKAGE CPACK_DEBIAN_<component>_DEBUGINFO_PACKAGE

Enable generation of dbgsym .ddeb package(s).

:Mandatory: No :Default: OFF

.. note::

Setting this also strips the ELF files in the generated non-dbgsym package, which results in debuginfo only being available in the dbgsym package.

.. note::

Binaries must contain debug symbols before packaging so use either Debug or RelWithDebInfo for :variable:CMAKE_BUILD_TYPE variable value.

Additionally, if :variable:CPACK_STRIP_FILES is set, the files will be stripped before they get to the DEB generator, so will not contain debug symbols and a dbgsym package will not get built. Do not use with :variable:CPACK_STRIP_FILES.

Building Debian packages on Windows ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

.. versionadded:: 3.10

To communicate UNIX file permissions from the install stage to the CPack DEB generator the cmake_mode_t NTFS alternate data stream (ADT) is used.

When a filesystem without ADT support is used only owner read/write permissions can be preserved.

Reproducible packages ^^^^^^^^^^^^^^^^^^^^^

.. versionadded:: 3.13

The environment variable :envvar:!SOURCE_DATE_EPOCH may be set to a UNIX timestamp, defined as the number of seconds, excluding leap seconds, since 01 Jan 1970 00:00:00 UTC. If set, the CPack DEB generator will use its value for timestamps in the package.