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cmake: find python in order specified by PATH environment variable.

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CMake policy CMP0094 controls a lookup strategy used to find a Python
executable:

* CMP0094=OLD selects a Python executable with a higher version.
* CMP0094=NEW selects a Python executable found earlier in PATH.

NEW behavior is critical in presence of a Python virtual environment
established and activated, i.e. added to the PATH variable.

In case GoogleTest is embedded into a larger project, the result of
`find_package(Python)` affects the whole build, not only GoogleTest
component itself.
This commit is contained in:
Andrei Polushin 2022-07-11 17:35:43 +07:00
parent bea621c3c3
commit 96ddde1235
1 changed files with 6 additions and 0 deletions
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6
googletest/cmake/internal_utils.cmake
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@ -244,6 +244,12 @@ function(cxx_executable name dir libs)
${name} "${cxx_default}" "${libs}" "${dir}/${name}.cc" ${ARGN})
endfunction()
# CMP0094 policy enables finding a Python executable in the LOCATION order, as
# specified by the PATH environment variable.
if (POLICY CMP0094)
cmake_policy(SET CMP0094 NEW)
endif()
# Sets PYTHONINTERP_FOUND and PYTHON_EXECUTABLE.
if ("${CMAKE_VERSION}" VERSION_LESS "3.12.0")
find_package(PythonInterp)