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| author | Brad King <brad.king@kitware.com> | 2021-04-26 15:33:39 (GMT) |
|---|---|---|
| committer | Kitware Robot <kwrobot@kitware.com> | 2021-04-26 15:33:49 (GMT) |
| commit | 3c1655936fec54e76d6f92ab6d37e2104db44699 (patch) | |
| tree | 7e019253de87fa29873d9dcfde8acb996a7cb82b /Modules | |
| parent | e69a3287256d5fb7f6f2a150f5e96ff7bcb0d9b7 (diff) | |
| parent | c5c130e675624eef03f5bcaf848810659e205ed2 (diff) | |
| download | CMake-3c1655936fec54e76d6f92ab6d37e2104db44699.zip CMake-3c1655936fec54e76d6f92ab6d37e2104db44699.tar.gz CMake-3c1655936fec54e76d6f92ab6d37e2104db44699.tar.bz2 | |
Merge topic 'lzma-threads'
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
Diffstat (limited to 'Modules')
| -rw-r--r-- | Modules/CPack.cmake | 25 |
1 files changed, 17 insertions, 8 deletions
diff --git a/Modules/CPack.cmake b/Modules/CPack.cmake index ef5a7d5..373a707 100644 --- a/Modules/CPack.cmake +++ b/Modules/CPack.cmake @@ -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 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |