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- From e359a7a3c4f9e70360a068bef19c95938fdacede Mon Sep 17 00:00:00 2001
- From: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
- Date: Wed, 23 Dec 2015 11:33:14 +0100
- Subject: [PATCH] Adjust library/header paths for cross-compilation
-
- When cross-compiling third-party extensions, the get_python_inc() or
- get_python_lib() can be called, to return the path to headers or
- libraries. However, they use the sys.prefix of the host Python, which
- returns incorrect paths when cross-compiling (paths pointing to host
- headers and libraries).
-
- In order to fix this, we introduce the _python_sysroot, _python_prefix
- and _python_exec_prefix variables, that allow to override these
- values, and get correct header/library paths when cross-compiling
- third-party Python modules.
-
- Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
- ---
- Lib/distutils/command/build_ext.py | 5 ++++-
- Lib/distutils/sysconfig.py | 15 +++++++++++----
- 2 files changed, 15 insertions(+), 5 deletions(-)
-
- --- a/Lib/distutils/command/build_ext.py
- +++ b/Lib/distutils/command/build_ext.py
- @@ -234,7 +234,10 @@ class build_ext(Command):
- if (sysconfig.get_config_var('Py_ENABLE_SHARED')):
- if not sysconfig.python_build:
- # building third party extensions
- - self.library_dirs.append(sysconfig.get_config_var('LIBDIR'))
- + libdir = sysconfig.get_config_var('LIBDIR')
- + if "_python_sysroot" in os.environ:
- + libdir = os.environ.get("_python_sysroot") + libdir
- + self.library_dirs.append(libdir)
- else:
- # building python standard extensions
- self.library_dirs.append('.')
- --- a/Lib/distutils/sysconfig.py
- +++ b/Lib/distutils/sysconfig.py
- @@ -18,10 +18,17 @@ from .errors import DistutilsPlatformErr
- from .util import get_platform, get_host_platform
-
- # These are needed in a couple of spots, so just compute them once.
- -PREFIX = os.path.normpath(sys.prefix)
- -EXEC_PREFIX = os.path.normpath(sys.exec_prefix)
- -BASE_PREFIX = os.path.normpath(sys.base_prefix)
- -BASE_EXEC_PREFIX = os.path.normpath(sys.base_exec_prefix)
- +if "_python_sysroot" in os.environ:
- + _sysroot=os.environ.get('_python_sysroot')
- + PREFIX = os.path.normpath(_sysroot + os.environ.get('_python_prefix'))
- + EXEC_PREFIX = os.path.normpath(_sysroot + os.environ.get('_python_exec_prefix'))
- + BASE_PREFIX = PREFIX
- + BASE_EXEC_PREFIX = EXEC_PREFIX
- +else:
- + PREFIX = os.path.normpath(sys.prefix)
- + EXEC_PREFIX = os.path.normpath(sys.exec_prefix)
- + BASE_PREFIX = os.path.normpath(sys.base_prefix)
- + BASE_EXEC_PREFIX = os.path.normpath(sys.base_exec_prefix)
-
- # Path to the base directory of the project. On Windows the binary may
- # live in project/PCbuild/win32 or project/PCbuild/amd64.
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