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cmake: fix Python executable with cmake

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Currently, CMake has two ways of finding Python executables:
FindPythonInterp and FindPython/FindPython3. FindPythonInterp is
deprecated and may be removed at some point. Currently, python3native
sets PYTHON_EXECUTABLE, which FindPythonInterp uses. This is a problem
for a few reasons:

- Setting PYTHON_EXECUTABLE as an environment variable doesn't work, as
  CMake needs it to be set as an explicit CMake option via -D.
- Projects using the newer FindPython/FindPython3 don't pickup the right
  Python, as the newer routines use Python_EXECUTABLE and
  Python3_EXECUTABLE.

Fix this by setting PYTHON_EXECUTABLE, Python_EXECUTABLE, and
Python3_EXECUTABLE using -D options to EXTRA_OECMAKE.

The CMake routines are documented below:
https://cmake.org/cmake/help/latest/module/FindPythonInterp.html
https://cmake.org/cmake/help/latest/module/FindPython.html
https://cmake.org/cmake/help/latest/module/FindPython3.html

(From OE-Core rev: a22200a646eaf42cd4902a2fe3358d29717ac129)

Signed-off-by: Martin Kelly <mkelly@xevo.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Martin Kelly
2020-04-02 13:56:32 -07:00
committed by Richard Purdie
parent c23d6f7799
commit 1b15cc6e65
2 changed files with 3 additions and 2 deletions
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2
meta/classes/python3native.bbclass
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@@ -1,8 +1,6 @@
inherit python3-dir
PYTHON="${STAGING_BINDIR_NATIVE}/python3-native/python3"
# PYTHON_EXECUTABLE is used by cmake
PYTHON_EXECUTABLE="${PYTHON}"
EXTRANATIVEPATH += "python3-native"
DEPENDS_append = " python3-native "