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#60847 [PATCH] Enable cross-compilation for the pyproject-build-system.

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From: Maxim Cournoyer <maxim.cournoyer@gmail.com>
To: 60847@debbugs.gnu.org
Subject: [PATCH 0/1] Enable cross-compilation for the pyproject-build-system
Date: Mon, 16 Jan 2023 00:01:30 -0500
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 Content preview: This change enables cross-compilation for the
 pyproject-build-system, 
 at the same time paving the way to fix the longstanding bug #25235 (Wrapped
 python programs get native-inputs in PYTHONPATH), by k [...] 
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Cc: Josselin Poiret <dev@jpoiret.xyz>, Tobias Geerinckx-Rice <me@tobias.gr>,
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 Content preview:  This change enables cross-compilation for the pyproject-build-system,
    at the same time paving the way to fix the longstanding bug #25235 (Wrapped
    python programs get native-inputs in PYTHONPATH), by k [...] 
 
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This change enables cross-compilation for the pyproject-build-system, at the
same time paving the way to fix the longstanding bug #25235 (Wrapped python
programs get native-inputs in PYTHONPATH), by keeping the distinction between
native and host (regular) inputs even when not cross-compiling.  A unified
builder is used, which departs from the other build systems (which use one
builder for the native build and another one for the cross build, where
implemented).

If this change is accepted, there would be adjustments needed to some of the
~120 Python packages using pyproject (looking for a native inputs now needs to
be done using the 'native-inputs' instead of 'inputs' argument even in the
native compilation mode).  Over time I think it'd make sense to migrate more
build systems to use this scheme, since it gives more control as to what
inputs go into the wrapper.

A demo package, python-pycryptodome, that contains C extensions is adjusted so
that it can be cross-compiled using this new build system.  It is provided
separately as it would need to go to core-updates.


Maxim Cournoyer (1):
  build: Enable cross-compilation for pyproject-build-system.

 guix/build-system/pyproject.scm       | 115 ++++++++++++++---------
 guix/build/pyproject-build-system.scm | 126 +++++++++++++++++++++++---
 guix/packages.scm                     |  46 +++++-----
 3 files changed, 210 insertions(+), 77 deletions(-)


base-commit: 5c921977179489caef4a9e54ada6696fc86d2f0b
-- 
2.38.1

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