cpython/Lib/distutils/sysconfig.py

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"""Provide access to Python's configuration information. The specific names
defined in the module depend heavily on the platform and configuration.
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Written by: Fred L. Drake, Jr.
Email: <fdrake@acm.org>
Initial date: 17-Dec-1998
"""
__revision__ = "$Id$"
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import os
import re
import string
import sys
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from errors import DistutilsPlatformError
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PREFIX = os.path.normpath(sys.prefix)
EXEC_PREFIX = os.path.normpath(sys.exec_prefix)
def get_python_inc(plat_specific=0, prefix=None):
"""Return the directory containing installed Python header files.
If 'plat_specific' is false (the default), this is the path to the
non-platform-specific header files, i.e. Python.h and so on;
otherwise, this is the path to platform-specific header files
(namely config.h).
If 'prefix' is supplied, use it instead of sys.prefix or
sys.exec_prefix -- i.e., ignore 'plat_specific'.
"""
if prefix is None:
prefix = (plat_specific and EXEC_PREFIX or PREFIX)
if os.name == "posix":
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return os.path.join(prefix, "include", "python" + sys.version[:3])
elif os.name == "nt":
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return os.path.join(prefix, "Include") # include or Include?
elif os.name == "mac":
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return os.path.join(prefix, "Include")
else:
raise DistutilsPlatformError, \
("I don't know where Python installs its C header files " +
"on platform '%s'") % os.name
def get_python_lib(plat_specific=0, standard_lib=0, prefix=None):
"""Return the directory containing the Python library (standard or
site additions).
If 'plat_specific' is true, return the directory containing
platform-specific modules, i.e. any module from a non-pure-Python
module distribution; otherwise, return the platform-shared library
directory. If 'standard_lib' is true, return the directory
containing standard Python library modules; otherwise, return the
directory for site-specific modules.
If 'prefix' is supplied, use it instead of sys.prefix or
sys.exec_prefix -- i.e., ignore 'plat_specific'.
"""
if prefix is None:
prefix = (plat_specific and EXEC_PREFIX or PREFIX)
if os.name == "posix":
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libpython = os.path.join(prefix,
"lib", "python" + sys.version[:3])
if standard_lib:
return libpython
else:
return os.path.join(libpython, "site-packages")
elif os.name == "nt":
if standard_lib:
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return os.path.join(PREFIX, "Lib")
else:
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return prefix
elif os.name == "mac":
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if plat_specific:
if standard_lib:
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return os.path.join(EXEC_PREFIX, "Mac", "Plugins")
else:
raise DistutilsPlatformError, \
"OK, where DO site-specific extensions go on the Mac?"
else:
if standard_lib:
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return os.path.join(PREFIX, "Lib")
else:
raise DistutilsPlatformError, \
"OK, where DO site-specific modules go on the Mac?"
else:
raise DistutilsPlatformError, \
("I don't know where Python installs its library " +
"on platform '%s'") % os.name
# get_python_lib()
def customize_compiler (compiler):
"""Do any platform-specific customization of the CCompiler instance
'compiler'. Mainly needed on Unix, so we can plug in the information
that varies across Unices and is stored in Python's Makefile.
"""
if compiler.compiler_type == "unix":
cc_cmd = CC + ' ' + OPT
compiler.set_executables(
preprocessor=CC + " -E", # not always!
compiler=cc_cmd,
compiler_so=cc_cmd + ' ' + CCSHARED,
linker_so=LDSHARED,
linker_exe=CC)
compiler.shared_lib_extension = SO
def get_config_h_filename():
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"""Return full pathname of installed config.h file."""
inc_dir = get_python_inc(plat_specific=1)
return os.path.join(inc_dir, "config.h")
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def get_makefile_filename():
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"""Return full pathname of installed Makefile from the Python build."""
lib_dir = get_python_lib(plat_specific=1, standard_lib=1)
return os.path.join(lib_dir, "config", "Makefile")
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def parse_config_h(fp, g=None):
"""Parse a config.h-style file.
A dictionary containing name/value pairs is returned. If an
optional dictionary is passed in as the second argument, it is
used instead of a new dictionary.
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"""
if g is None:
g = {}
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define_rx = re.compile("#define ([A-Z][A-Z0-9_]+) (.*)\n")
undef_rx = re.compile("/[*] #undef ([A-Z][A-Z0-9_]+) [*]/\n")
#
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while 1:
line = fp.readline()
if not line:
break
m = define_rx.match(line)
if m:
n, v = m.group(1, 2)
try: v = string.atoi(v)
except ValueError: pass
g[n] = v
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else:
m = undef_rx.match(line)
if m:
g[m.group(1)] = 0
return g
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def parse_makefile(fp, g=None):
"""Parse a Makefile-style file.
A dictionary containing name/value pairs is returned. If an
optional dictionary is passed in as the second argument, it is
used instead of a new dictionary.
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"""
if g is None:
g = {}
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variable_rx = re.compile("([a-zA-Z][a-zA-Z0-9_]+)\s*=\s*(.*)\n")
done = {}
notdone = {}
#
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while 1:
line = fp.readline()
if not line:
break
m = variable_rx.match(line)
if m:
n, v = m.group(1, 2)
v = string.strip(v)
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if "$" in v:
notdone[n] = v
else:
try: v = string.atoi(v)
except ValueError: pass
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done[n] = v
# do variable interpolation here
findvar1_rx = re.compile(r"\$\(([A-Za-z][A-Za-z0-9_]*)\)")
findvar2_rx = re.compile(r"\${([A-Za-z][A-Za-z0-9_]*)}")
while notdone:
for name in notdone.keys():
value = notdone[name]
m = findvar1_rx.search(value)
if not m:
m = findvar2_rx.search(value)
if m:
n = m.group(1)
if done.has_key(n):
after = value[m.end():]
value = value[:m.start()] + done[n] + after
if "$" in after:
notdone[name] = value
else:
try: value = string.atoi(value)
except ValueError: pass
done[name] = string.strip(value)
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del notdone[name]
elif notdone.has_key(n):
# get it on a subsequent round
pass
else:
done[n] = ""
after = value[m.end():]
value = value[:m.start()] + after
if "$" in after:
notdone[name] = value
else:
try: value = string.atoi(value)
except ValueError: pass
done[name] = string.strip(value)
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del notdone[name]
else:
# bogus variable reference; just drop it since we can't deal
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del notdone[name]
# save the results in the global dictionary
g.update(done)
return g
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def _init_posix():
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"""Initialize the module as appropriate for POSIX systems."""
g = globals()
# load the installed Makefile:
try:
filename = get_makefile_filename()
file = open(filename)
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
parse_makefile(file, g)
# 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.
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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)
if 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_name = os.path.basename(string.split(g['LDSHARED'])[0])
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, sys.prefix, sys.version[0:3]))
def _init_nt():
"""Initialize the module as appropriate for NT"""
g = globals()
# set basic install directories
g['LIBDEST'] = get_python_lib(plat_specific=0, standard_lib=1)
g['BINLIBDEST'] = get_python_lib(plat_specific=1, standard_lib=1)
# XXX hmmm.. a normal install puts include files here
g['INCLUDEPY'] = get_python_inc(plat_specific=0)
g['SO'] = '.pyd'
g['EXE'] = ".exe"
g['exec_prefix'] = EXEC_PREFIX
def _init_mac():
"""Initialize the module as appropriate for Macintosh systems"""
g = globals()
# set basic install directories
g['LIBDEST'] = get_python_lib(plat_specific=0, standard_lib=1)
g['BINLIBDEST'] = get_python_lib(plat_specific=1, standard_lib=1)
# XXX hmmm.. a normal install puts include files here
g['INCLUDEPY'] = get_python_inc(plat_specific=0)
g['SO'] = '.ppc.slb'
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g['exec_prefix'] = EXEC_PREFIX
print sys.prefix, PREFIX
# XXX are these used anywhere?
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g['install_lib'] = os.path.join(EXEC_PREFIX, "Lib")
g['install_platlib'] = os.path.join(EXEC_PREFIX, "Mac", "Lib")
try:
exec "_init_" + os.name
except NameError:
# not needed for this platform
pass
else:
exec "_init_%s()" % os.name
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del _init_posix
del _init_nt
del _init_mac