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Merge topic 'lzma-threads'

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c5c130e675 cmArchiveWrite: Consolidate multiple ways to set thread count
5380d858ff liblzma: Enable multi threaded stream encoding support
e9065e96dc Merge branch 'upstream-liblzma' into lzma-threads
ee909a8e8b liblzma 2020-03-17 (2327a461)
741b85b42b liblzma: Revise update script to get version 5.2.5

Acked-by: Kitware Robot <kwrobot@kitware.com>
Acked-by: Ben Boeckel <ben.boeckel@kitware.com>
Merge-request: !6014
This commit is contained in:
Brad King
2021-04-26 15:33:39 +00:00
committed by Kitware Robot
parent e69a328725 c5c130e675
commit 3c1655936f
66 changed files with 1298 additions and 338 deletions
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Modules/CPack.cmake
+17 -8
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@@ -291,18 +291,27 @@ installers. The most commonly-used variables are:
Some compression methods used by CPack generators such as Debian or Archive
may take advantage of multiple CPU cores to speed up compression.
``CPACK_THREADS`` can be set to positive integer to specify how many threads
will be used for compression. If it is set to 0, CPack will set it so that
all available CPU cores are used.
``CPACK_THREADS`` can be set to specify how many threads will be
used for compression.
A positive integer can be used to specify an exact desired thread count.
When given a negative integer CPack will use the absolute value
as the upper limit but may choose a lower value based on
the available hardware concurrency.
Given 0 CPack will try to use all available CPU cores.
By default ``CPACK_THREADS`` is set to ``1``.
Currently only ``xz`` compression *may* take advantage of multiple cores. Other
compression methods ignore this value and use only one thread.
Currently only ``xz`` compression *may* take advantage of multiple cores.
Other compression methods ignore this value and use only one thread.
.. note::
.. versionadded:: 3.21
Official CMake binaries available on ``cmake.org`` ship with a ``liblzma``
that does not support parallel compression.
Official CMake binaries available on ``cmake.org`` now ship
with a ``liblzma`` that supports parallel compression.
Older versions did not.
Variables for Source Package Generators
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^