- Issue #13150, #17512: sysconfig no longer parses the Makefile and config.h
files when imported, instead doing it at build time. This makes importing
sysconfig faster and reduces Python startup time by 20%.
diff --git a/Lib/distutils/sysconfig.py b/Lib/distutils/sysconfig.py
index 250ef38..0c726d9 100644
--- a/Lib/distutils/sysconfig.py
+++ b/Lib/distutils/sysconfig.py
@@ -387,66 +387,11 @@
def _init_posix():
"""Initialize the module as appropriate for POSIX systems."""
- g = {}
- # load the installed Makefile:
- try:
- filename = get_makefile_filename()
- parse_makefile(filename, g)
- except IOError, msg:
- my_msg = "invalid Python installation: unable to open %s" % filename
- if hasattr(msg, "strerror"):
- my_msg = my_msg + " (%s)" % msg.strerror
-
- raise DistutilsPlatformError(my_msg)
-
- # load the installed pyconfig.h:
- try:
- filename = get_config_h_filename()
- parse_config_h(file(filename), g)
- except IOError, msg:
- my_msg = "invalid Python installation: unable to open %s" % filename
- if hasattr(msg, "strerror"):
- my_msg = my_msg + " (%s)" % msg.strerror
-
- raise DistutilsPlatformError(my_msg)
-
- # On AIX, there are wrong paths to the linker scripts in the Makefile
- # -- these paths are relative to the Python source, but when installed
- # the scripts are in another directory.
- if python_build:
- g['LDSHARED'] = g['BLDSHARED']
-
- elif get_python_version() < '2.1':
- # The following two branches are for 1.5.2 compatibility.
- if sys.platform == 'aix4': # what about AIX 3.x ?
- # Linker script is in the config directory, not in Modules as the
- # Makefile says.
- python_lib = get_python_lib(standard_lib=1)
- ld_so_aix = os.path.join(python_lib, 'config', 'ld_so_aix')
- python_exp = os.path.join(python_lib, 'config', 'python.exp')
-
- g['LDSHARED'] = "%s %s -bI:%s" % (ld_so_aix, g['CC'], python_exp)
-
- elif sys.platform == 'beos':
- # Linker script is in the config directory. In the Makefile it is
- # relative to the srcdir, which after installation no longer makes
- # sense.
- python_lib = get_python_lib(standard_lib=1)
- linkerscript_path = string.split(g['LDSHARED'])[0]
- linkerscript_name = os.path.basename(linkerscript_path)
- linkerscript = os.path.join(python_lib, 'config',
- linkerscript_name)
-
- # XXX this isn't the right place to do this: adding the Python
- # library to the link, if needed, should be in the "build_ext"
- # command. (It's also needed for non-MS compilers on Windows, and
- # it's taken care of for them by the 'build_ext.get_libraries()'
- # method.)
- g['LDSHARED'] = ("%s -L%s/lib -lpython%s" %
- (linkerscript, PREFIX, get_python_version()))
-
+ # _sysconfigdata is generated at build time, see the sysconfig module
+ from _sysconfigdata import build_time_vars
global _config_vars
- _config_vars = g
+ _config_vars = {}
+ _config_vars.update(build_time_vars)
def _init_nt():