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python3: split python target configuration into own class

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Setting _PYTHON_SYSCONFIGDATA_NAME in python3native class globally was
problematic as it was leaking into host python environment, which
was causing tracebacks depending on host distro and action
(typically anything involving importing sysconfig module).

The new class sets the variable only in specific tasks where it is needed,
and should be inherited explicitly:
- use python3native to run scripts with native python
- use python3targetconfig to run scripts with native python
if those scripts need to access target config data (such
as correct installation directories). This also adds a dependency
on target python, so should be used carefully to avoid lengthening builds.

(From OE-Core rev: 0bdc6a25c102068de27d98c9b632f222feb991fb)

Signed-off-by: Alexander Kanavin <alex.kanavin@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit 5a118d4e7985fa88f04c3611f8db813f0dafce75)
Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Alexander Kanavin
2020-11-13 20:48:50 +01:00
committed by Richard Purdie
parent 1214eaaea6
commit 9dc4f3cebc
2 changed files with 15 additions and 2 deletions
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2
meta/classes/python3native.bbclass
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@@ -17,8 +17,6 @@ export STAGING_LIBDIR
export PYTHON_LIBRARY="${STAGING_LIBDIR}/lib${PYTHON_DIR}${PYTHON_ABI}.so"
export PYTHON_INCLUDE_DIR="${STAGING_INCDIR}/${PYTHON_DIR}${PYTHON_ABI}"
export _PYTHON_SYSCONFIGDATA_NAME="_sysconfigdata"
# suppress host user's site-packages dirs.
export PYTHONNOUSERSITE = "1"