build/get-py-info.py

   1 #
   2 # get-py-info.py: get various Python info (for building)
   3 #
   4 ######################################################################
   5 #
   6 # Copyright (c) 2002-2006 CollabNet.  All rights reserved.
   7 #
   8 # This software is licensed as described in the file COPYING, which
   9 # you should have received as part of this distribution.  The terms
  10 # are also available at http://subversion.tigris.org/license-1.html.
  11 # If newer versions of this license are posted there, you may use a
  12 # newer version instead, at your option.
  13 #
  14 ######################################################################
  15 #
  16 # This should be loaded/run by the appropriate Python, rather than executed
  17 # directly as a program. In other words, you should:
  18 #
  19 #    $ python2 get-py-info.py --includes
  20 #
  21
  22 import sys
  23 import os
  24
  25 def usage():
  26   print 'USAGE: python %s WHAT' % sys.argv[0]
  27   print '  Returns information about how to build Python extensions.'
  28   print '  WHAT may be one of:'
  29   print "    --includes : return -I include flags"
  30   print "    --compile  : return a compile command"
  31   print "    --link     : return a link command"
  32   print "    --libs     : return just the library options for linking"
  33   sys.exit(1)
  34
  35 if len(sys.argv) != 2:
  36   usage()
  37
  38 try:
  39   from distutils import sysconfig
  40 except ImportError:
  41   # No information available
  42   print "none"
  43   sys.exit(1)
  44
  45 if sys.argv[1] == '--includes':
  46   inc = sysconfig.get_python_inc()
  47   plat = sysconfig.get_python_inc(plat_specific=1)
  48   if inc == plat:
  49     print "-I" + inc
  50   else:
  51     print "-I%s -I%s" % (inc, plat)
  52   sys.exit(0)
  53
  54 if sys.argv[1] == '--compile':
  55   cc, basecflags, opt, ccshared = \
  56       sysconfig.get_config_vars('CC', 'BASECFLAGS', 'OPT', 'CCSHARED')
  57   if basecflags:
  58     opt = basecflags + ' ' + opt
  59   print cc, opt, ccshared
  60   sys.exit(0)
  61
  62 def add_option(options, name, value=None):
  63   """Add option to list of options"""
  64   options.append(name)
  65   if value is not None:
  66     options.append(value)
  67
  68 def add_option_if_missing(options, name, value=None):
  69   """Add option to list of options, if it is not already present"""
  70   if options.count(name) == 0 and options.count("-Wl,%s" % name) == 0:
  71     add_option(options, name, value)
  72
  73 def link_options():
  74   """Get list of Python linker options"""
  75
  76   # Initialize config variables
  77   assert os.name == "posix"
  78   options = sysconfig.get_config_var('LDSHARED').split()
  79   fwdir = sysconfig.get_config_var('PYTHONFRAMEWORKDIR')
  80
  81   if fwdir and fwdir != "no-framework":
  82
  83     # Setup the framework prefix
  84     fwprefix = sysconfig.get_config_var('PYTHONFRAMEWORKPREFIX')
  85     if fwprefix != "/System/Library/Frameworks":
  86       add_option_if_missing(options, "-F%s" % fwprefix)
  87
  88     # Load in the framework
  89     fw = sysconfig.get_config_var('PYTHONFRAMEWORK')
  90     add_option(options, "-framework", fw)
  91
  92   elif sys.platform == 'darwin':
  93
  94     # Load bundles from python
  95     python_exe = os.path.join(sysconfig.get_config_var("BINDIR"),
  96       sysconfig.get_config_var('PYTHON'))
  97     add_option_if_missing(options, "-bundle_loader", python_exe)
  98
  99   elif sys.platform == 'cygwin' or sys.platform.startswith('openbsd'):
 100
 101     # Add flags to build against the Python library (also necessary
 102     # for Darwin, but handled elsewhere).
 103
 104     # Find the path to the library, and add a flag to include it as a
 105     # library search path.
 106     shared_libdir = sysconfig.get_config_var('LIBDIR')
 107     static_libdir = sysconfig.get_config_var('LIBPL')
 108     ldlibrary = sysconfig.get_config_var('LDLIBRARY')
 109     if os.path.exists(os.path.join(shared_libdir, ldlibrary)):
 110       if shared_libdir != '/usr/lib':
 111         add_option_if_missing(options, '-L%s' % shared_libdir)
 112     elif os.path.exists(os.path.join(static_libdir, ldlibrary)):
 113       add_option_if_missing(options, "-L%s" % static_libdir)
 114
 115     # Add a flag to build against the library itself.
 116     python_version = sysconfig.get_config_var('VERSION')
 117     add_option_if_missing(options, "-lpython%s" % python_version)
 118
 119   return options
 120
 121 def lib_options():
 122   """Get list of Python library options"""
 123   link_command = link_options()
 124   options = []
 125
 126   # Extract library-related options from link command
 127   for i in range(len(link_command)):
 128     option = link_command[i]
 129     if (not option.startswith("-L:") and option.startswith("-L") or
 130         option.startswith("-Wl,") or option.startswith("-l") or
 131         option.startswith("-F") or option == "-bundle" or
 132         option == "-flat_namespace"):
 133       options.append(option)
 134     elif (option == "-undefined" or option == "-bundle_loader" or
 135           option == "-framework"):
 136       options.append(option)
 137       options.append(link_command[i+1])
 138
 139   return options
 140
 141 if sys.argv[1] == '--link':
 142   print " ".join(link_options())
 143   sys.exit(0)
 144
 145 if sys.argv[1] == '--libs':
 146   print " ".join(lib_options())
 147   sys.exit(0)
 148
 149 usage()