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From e634929f76a45f5b683dc19bc01efed2ab83e19e 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(-)
diff --git a/Lib/distutils/command/build_ext.py b/Lib/distutils/command/build_ext.py
index d4cb11e..e7a0ba9 100644
--- a/Lib/distutils/command/build_ext.py
+++ b/Lib/distutils/command/build_ext.py
@@ -232,7 +232,10 @@ 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('.')
diff --git a/Lib/distutils/sysconfig.py b/Lib/distutils/sysconfig.py
index 721edec..d20e2d8 100644
--- a/Lib/distutils/sysconfig.py
+++ b/Lib/distutils/sysconfig.py
@@ -17,10 +17,17 @@ import sys
from .errors import DistutilsPlatformError
# 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.
--
2.6.4
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