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Use sysconfig in Python >= 3.10 (#3764)

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* Use sysconfig in Python >= 3.10

Rely on sysconfig for installation paths for Python >= 3.10. distutils
has been deprecated and will be removed.

Fixes: #3677

* Explicitly select the posix_prefix scheme for platinclude on Debian

Debian's default scheme is posix_local, for installing locally-built
packages to /usr/local/.  We want to find the Python headers in /usr/,
so search posix_prefix.
This commit is contained in:
Stefano Rivera 2022-03-01 10:47:10 -08:00 committed by Henry Schreiner
parent 80589625c7
commit bdec573794
1 changed files with 16 additions and 3 deletions
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19
tools/FindPythonLibsNew.cmake
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@ -112,11 +112,24 @@ endif()
# VERSION. VERSION will typically be like "2.7" on unix, and "27" on windows.
execute_process(
COMMAND
"${PYTHON_EXECUTABLE}" "-c" "from distutils import sysconfig as s;import sys;import struct;
"${PYTHON_EXECUTABLE}" "-c" "
import sys;import struct;
import sysconfig as s
USE_SYSCONFIG = sys.version_info >= (3, 10)
if not USE_SYSCONFIG:
from distutils import sysconfig as ds
print('.'.join(str(v) for v in sys.version_info));
print(sys.prefix);
print(s.get_python_inc(plat_specific=True));
print(s.get_python_lib(plat_specific=True));
if USE_SYSCONFIG:
scheme = s.get_default_scheme()
if scheme == 'posix_local':
# Debian's default scheme installs to /usr/local/ but we want to find headers in /usr/
scheme = 'posix_prefix'
print(s.get_path('platinclude', scheme))
print(s.get_path('platlib'))
else:
print(ds.get_python_inc(plat_specific=True));
print(ds.get_python_lib(plat_specific=True));
print(s.get_config_var('EXT_SUFFIX') or s.get_config_var('SO'));
print(hasattr(sys, 'gettotalrefcount')+0);
print(struct.calcsize('@P'));