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Merge topic 'parallel-lzma-compression'

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b3bacf0152 cmCPackArchiveGenerator: support multithreaded compression
b71d385ed4 cmCPackArchiveGenerator: support setting archive options
948aa8bd1c cmArchiveWrite: support setting archive filter options
b9c17de023 cmArchiveWrite: split out opening the file

Acked-by: Kitware Robot <kwrobot@kitware.com>
Acked-by: Cristian Adam <cristian.adam@gmail.com>
Merge-request: !3195
This commit is contained in:
Brad King
2020-04-06 12:28:04 +00:00
committed by Kitware Robot
parent 2b9e3abcb5 b3bacf0152
commit f0a27e44f3
15 changed files with 123 additions and 1 deletions
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Help/cpack_gen/archive.rst
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@@ -51,3 +51,25 @@ Variables specific to CPack Archive generator
Enable component packaging. If enabled (ON), then the archive generator
creates multiple packages. The default is OFF, which means that a single
package containing files of all components is generated.
Variables used by CPack Archive generator
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
These variables are used by the Archive generator, but are also available to
CPack generators which are essentially archives at their core. These include:
- :cpack_gen:`CPack Cygwin Generator`
- :cpack_gen:`CPack FreeBSD Generator`
.. variable:: CPACK_ARCHIVE_THREADS
The number of threads to use when performing the compression. If set to
``0``, the number of available cores on the machine will be used instead.
The default is ``1`` which limits compression to a single thread. Note that
not all compression modes support threading in all environments. Currently,
only the XZ compression may support it.
.. note::
Official CMake binaries available on ``cmake.org`` ship with a ``liblzma``
that does not support parallel compression.
Help/cpack_gen/cygwin.rst
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@@ -3,6 +3,11 @@ CPack Cygwin Generator
Cygwin CPack generator (Cygwin).
Variables affecting the CPack Cygwin generator
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
- :variable:`CPACK_ARCHIVE_THREADS`
Variables specific to CPack Cygwin generator
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Help/cpack_gen/freebsd.rst
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@@ -3,6 +3,11 @@ CPack FreeBSD Generator
The built in (binary) CPack FreeBSD (pkg) generator (Unix only)
Variables affecting the CPack FreeBSD (pkg) generator
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
- :variable:`CPACK_ARCHIVE_THREADS`
Variables specific to CPack FreeBSD (pkg) generator
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Help/release/dev/parallel-lzma-compression.rst
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@@ -0,0 +1,6 @@
parallel-lzma-compression
-------------------------
* The :cpack_gen:`CPack Archive Generator`'s ``TXZ`` format learned the
:variable:`CPACK_ARCHIVE_THREADS` variable to enable parallel compression.
Requires support in the ``liblzma`` used by CMake.