Issue #15364: Fix sysconfig.get_config_var('srcdir') to be an absolute path.
diff --git a/Lib/sysconfig.py b/Lib/sysconfig.py
index 7982893..ba4024f 100644
--- a/Lib/sysconfig.py
+++ b/Lib/sysconfig.py
@@ -533,28 +533,22 @@
# the init-function.
_CONFIG_VARS['userbase'] = _getuserbase()
- if 'srcdir' not in _CONFIG_VARS:
- _CONFIG_VARS['srcdir'] = _PROJECT_BASE
- else:
- _CONFIG_VARS['srcdir'] = _safe_realpath(_CONFIG_VARS['srcdir'])
-
- # Convert srcdir into an absolute path if it appears necessary.
- # Normally it is relative to the build directory. However, during
- # testing, for example, we might be running a non-installed python
- # from a different directory.
- if _PYTHON_BUILD and os.name == "posix":
- base = _PROJECT_BASE
- try:
- cwd = os.getcwd()
- except OSError:
- cwd = None
- if (not os.path.isabs(_CONFIG_VARS['srcdir']) and
- base != cwd):
- # srcdir is relative and we are not in the same directory
- # as the executable. Assume executable is in the build
- # directory and make srcdir absolute.
- srcdir = os.path.join(base, _CONFIG_VARS['srcdir'])
- _CONFIG_VARS['srcdir'] = os.path.normpath(srcdir)
+ # Always convert srcdir to an absolute path
+ srcdir = _CONFIG_VARS.get('srcdir', _PROJECT_BASE)
+ if os.name == 'posix':
+ if _PYTHON_BUILD:
+ # If srcdir is a relative path (typically '.' or '..')
+ # then it should be interpreted relative to the directory
+ # containing Makefile.
+ base = os.path.dirname(get_makefile_filename())
+ srcdir = os.path.join(base, srcdir)
+ else:
+ # srcdir is not meaningful since the installation is
+ # spread about the filesystem. We choose the
+ # directory containing the Makefile since we know it
+ # exists.
+ srcdir = os.path.dirname(get_makefile_filename())
+ _CONFIG_VARS['srcdir'] = _safe_realpath(srcdir)
# OS X platforms require special customization to handle
# multi-architecture, multi-os-version installers