lang/python/python3/patches/008-distutils-use-python-sysroot.patch

   1 From e359a7a3c4f9e70360a068bef19c95938fdacede Mon Sep 17 00:00:00 2001
   2 From: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
   3 Date: Wed, 23 Dec 2015 11:33:14 +0100
   4 Subject: [PATCH] Adjust library/header paths for cross-compilation
   5
   6 When cross-compiling third-party extensions, the get_python_inc() or
   7 get_python_lib() can be called, to return the path to headers or
   8 libraries. However, they use the sys.prefix of the host Python, which
   9 returns incorrect paths when cross-compiling (paths pointing to host
  10 headers and libraries).
  11
  12 In order to fix this, we introduce the _python_sysroot, _python_prefix
  13 and _python_exec_prefix variables, that allow to override these
  14 values, and get correct header/library paths when cross-compiling
  15 third-party Python modules.
  16
  17 Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
  18 ---
  19  Lib/distutils/command/build_ext.py |  5 ++++-
  20  Lib/sysconfig.py                   | 15 +++++++++++----
  21  2 files changed, 15 insertions(+), 5 deletions(-)
  22
  23 --- a/Lib/distutils/command/build_ext.py
  24 +++ b/Lib/distutils/command/build_ext.py
  25 @@ -234,7 +234,10 @@ class build_ext(Command):
  26          if (sysconfig.get_config_var('Py_ENABLE_SHARED')):
  27              if not sysconfig.python_build:
  28                  # building third party extensions
  29 -                self.library_dirs.append(sysconfig.get_config_var('LIBDIR'))
  30 +                libdir = sysconfig.get_config_var('LIBDIR')
  31 +                if "_python_sysroot" in os.environ:
  32 +                    libdir = os.environ.get("_python_sysroot") + libdir
  33 +                self.library_dirs.append(libdir)
  34              else:
  35                  # building python standard extensions
  36                  self.library_dirs.append('.')
  37 --- a/Lib/sysconfig.py
  38 +++ b/Lib/sysconfig.py
  39 @@ -168,10 +168,17 @@ _SCHEME_KEYS = ('stdlib', 'platstdlib',
  40  _PY_VERSION = sys.version.split()[0]
  41  _PY_VERSION_SHORT = f'{sys.version_info[0]}.{sys.version_info[1]}'
  42  _PY_VERSION_SHORT_NO_DOT = f'{sys.version_info[0]}{sys.version_info[1]}'
  43 -_PREFIX = os.path.normpath(sys.prefix)
  44 -_BASE_PREFIX = os.path.normpath(sys.base_prefix)
  45 -_EXEC_PREFIX = os.path.normpath(sys.exec_prefix)
  46 -_BASE_EXEC_PREFIX = os.path.normpath(sys.base_exec_prefix)
  47 +if "_python_sysroot" in os.environ:
  48 +    _sysroot=os.environ.get('_python_sysroot')
  49 +    _PREFIX = os.path.normpath(_sysroot + os.environ.get('_python_prefix'))
  50 +    _EXEC_PREFIX = os.path.normpath(_sysroot + os.environ.get('_python_exec_prefix'))
  51 +    _BASE_PREFIX = _PREFIX
  52 +    _BASE_EXEC_PREFIX = _EXEC_PREFIX
  53 +else:
  54 +    _PREFIX = os.path.normpath(sys.prefix)
  55 +    _EXEC_PREFIX = os.path.normpath(sys.exec_prefix)
  56 +    _BASE_PREFIX = os.path.normpath(sys.base_prefix)
  57 +    _BASE_EXEC_PREFIX = os.path.normpath(sys.base_exec_prefix)
  58  _CONFIG_VARS = None
  59  _USER_BASE = None
  60