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document config setting "-C parallel=n" for number of CPUs to use for compilation

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Nulano 2023-12-31 02:22:05 +01:00
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docs/installation.rst
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@ -390,9 +390,10 @@ After navigating to the Pillow directory, run::
Build Options
"""""""""""""
* Environment variable: ``MAX_CONCURRENCY=n``. Pillow can use
multiprocessing to build the extension. Setting ``MAX_CONCURRENCY``
sets the number of CPUs to use, or can disable parallel building by
* Config setting: ``-C parallel=n``. Can also be given
with environment variable: ``MAX_CONCURRENCY=n``. Pillow can use
multiprocessing to build the extension. Setting ``-C parallel=n``
sets the number of CPUs to use to ``n``, or can disable parallel building by
using a setting of 1. By default, it uses 4 CPUs, or if 4 are not
available, as many as are present.
@ -417,14 +418,13 @@ Build Options
used to compile the standard Pillow wheels. Compiling libraqm requires
a C99-compliant compiler.
* Build flag: ``-C platform-guessing=disable``. Skips all of the
* Config setting: ``-C platform-guessing=disable``. Skips all of the
platform dependent guessing of include and library directories for
automated build systems that configure the proper paths in the
environment variables (e.g. Buildroot).
* Build flag: ``-C debug=true``. Adds a debugging flag to the include and
library search process to dump all paths searched for and found to
stdout.
* Config setting: ``-C debug=true``. Adds a debugging flag to the include and
library search process to dump all paths searched for and found to stdout.
Sample usage::