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Recommend --config-cache for ./configure #1794

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Recommend --config-cache for ./configure #1794

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30a3410
gh-1547: Recommend --config-cache for configure
johnslavik Apr 22, 2026
05ad04c
gh-1547: Also mention --cache-file=config.cache alias
johnslavik Apr 22, 2026
69463e6
gh-1547: Remove --config-cache from platform-specific configure commands
johnslavik Apr 22, 2026
7e8285f
gh-1547: Restructure --config-cache as optional speedup tip
johnslavik Apr 22, 2026
f9a2af1
gh-1547: Use tip admonition for --config-cache
johnslavik Apr 22, 2026
091f2fc
gh-1547: Add --config-cache to macOS platform-specific configure comm…
johnslavik Apr 22, 2026
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gh-1547: Remove --config-cache from platform-specific configure commands
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@johnslavik
johnslavik committed Apr 22, 2026
commit 69463e6ab9ee046c707f4f35ef02180bcdc06efc
14 changes: 5 additions & 9 deletions getting-started/setup-building.rst
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@hugovk hugovk Apr 22, 2026

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If you click macOS from the front page:

See also more detailed instructions, how to install and build dependencies, and the platform-specific pages for Unix, macOS, and Windows.

That takes you to this tab:

https://cpython-devguide--1794.org.readthedocs.build/getting-started/setup-building/#macos

Which includes this (and a 3.10 version):

$ GDBM_CFLAGS="-I$(brew --prefix gdbm)/include" \
   GDBM_LIBS="-L$(brew --prefix gdbm)/lib -lgdbm" \
   ./configure --with-pydebug \
               --with-openssl="$(brew --prefix openssl@3)"

Let's include --config-cache in those:

$ GDBM_CFLAGS="-I$(brew --prefix gdbm)/include" \
   GDBM_LIBS="-L$(brew --prefix gdbm)/lib -lgdbm" \
   ./configure --config-cache \
               --with-pydebug \
               --with-openssl="$(brew --prefix openssl@3)"

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@johnslavik johnslavik Apr 22, 2026 •
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Oh I just reverted that in 69463e6. If you want me to add these back, I'll add.

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@hugovk hugovk Apr 22, 2026

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Let's add it back, it's good to have useful snippets because people will copy and paste them (at least I do :)

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@johnslavik johnslavik Apr 22, 2026

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I added back to all 4 (brew, macports).

Original file line number Diff line number Diff line change
Expand Up @@ -288,7 +288,7 @@ to learn more about these options.

.. code:: console

$ ./configure --config-cache --enable-optimizations --with-lto
$ ./configure --enable-optimizations --with-lto

.. _windows-compiling:

Expand Down Expand Up @@ -869,8 +869,7 @@ some of CPython's modules (for example, ``zlib``).

$ GDBM_CFLAGS="-I$(brew --prefix gdbm)/include" \
GDBM_LIBS="-L$(brew --prefix gdbm)/lib -lgdbm" \
./configure --config-cache \
--with-pydebug \
./configure --with-pydebug \
--with-openssl="$(brew --prefix openssl@3)"

.. tab:: Python 3.10
Expand All @@ -879,8 +878,7 @@ some of CPython's modules (for example, ``zlib``).

$ CPPFLAGS="-I$(brew --prefix gdbm)/include -I$(brew --prefix xz)/include" \
LDFLAGS="-L$(brew --prefix gdbm)/lib -L$(brew --prefix xz)/lib" \
./configure --config-cache \
--with-pydebug \
./configure --with-pydebug \
--with-openssl="$(brew --prefix openssl@3)" \
--with-tcltk-libs="$(pkg-config --libs tcl tk)" \
--with-tcltk-includes="$(pkg-config --cflags tcl tk)" \
Expand All @@ -902,8 +900,7 @@ some of CPython's modules (for example, ``zlib``).

$ GDBM_CFLAGS="-I$(dirname $(dirname $(which port)))/include" \
GDBM_LIBS="-L$(dirname $(dirname $(which port)))/lib -lgdbm" \
./configure --config-cache \
--with-pydebug \
./configure --with-pydebug \
--with-system-libmpdec

.. tab:: Python 3.11-3.12
Expand All @@ -912,8 +909,7 @@ some of CPython's modules (for example, ``zlib``).

$ GDBM_CFLAGS="-I$(dirname $(dirname $(which port)))/include" \
GDBM_LIBS="-L$(dirname $(dirname $(which port)))/lib -lgdbm" \
./configure --config-cache \
--with-pydebug
./configure --with-pydebug

And finally, run ``make``::

Expand Down
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