8000 gh-90539: doc: Expand on what should not go into CFLAGS, LDFLAGS by mkoeppe · Pull Request #92754 · python/cpython · GitHub
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Merged
merged 7 commits into from
Jun 20, 2022
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gh-90539: doc: Expand on what should not go into CFLAGS, LDFLAGS #92754

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Doc/using/configure.rst: Expand on what should not go into CFLAGS, LD…
mkoeppe May 12, 2022
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📜🤖 Added by blurb_it.
blurb-it[bot] May 12, 2022
7a678d8
Doc/using/configure.rst: Fix rst markup
mkoeppe May 14, 2022
73f2c43
Doc/using/configure.rst: Fixup: LDFLAGS, not CFLAGS
mkoeppe May 14, 2022
8220995
Doc/using/configure.rst: Break a long sentence
mkoeppe May 17, 2022
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Doc/using/configure.rst: Break another long sentence
mkoeppe May 17, 2022
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Misc/NEWS.d/next/Documentation/2022-05-12-23-47-17.gh-issue-90539.nmR…
mkoeppe Jun 17, 2022
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Doc/using/configure.rst: Expand on what should not go into CFLAGS, LD… 
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@mkoeppe
mkoeppe committed May 12, 2022
commit de8cdcbbd7ecfba7b44ed92375b7e76f460115cc
18 changes: 18 additions & 0 deletions Doc/using/configure.rst
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Expand Up @@ -747,6 +747,17 @@ Compiler flags
extensions. Use it when a compiler flag should *not* be part of the
distutils :envvar:`CFLAGS` once Python is installed (:issue:`21121`).

In particular, :envvar:`CFLAGS` should not contain:

- the compiler flag `-I` (for setting the search path for include files);
the `-I` flags are processed from left to right, and any flags in
:envvar:`CFLAGS` would take precedence over user- and package-supplied `-I`
flags.

- hardening flags such as `-Werror` because distributions cannot control
whether packages installed by users conform to such heightened
standards.

.. versionadded:: 3.5

.. envvar:: EXTRA_CFLAGS
Expand Down Expand Up @@ -859,6 +870,13 @@ Linker flags
:envvar:`CFLAGS_NODIST`. Use it when a linker flag should *not* be part of
the distutils :envvar:`LDFLAGS` once Python is installed (:issue:`35257`).

In particular, :envvar:`LDFLAGS` should not contain:

- the compiler flag `-L` (for setting the search path for libraries);
the `-L` flags are processed from left to right, and any flags in
:envvar:`CFLAGS` would take precedence over user- and package-supplied `-L`
flags.

.. envvar:: CONFIGURE_LDFLAGS_NODIST

Value of :envvar:`LDFLAGS_NODIST` variable passed to the ``./configure``
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