buildtools/wafsamba/samba_python.py

   1 # waf build tool for building IDL files with pidl
   2
   3 import os, sys
   4 from waflib import Build, Logs, Utils, Configure, Errors
   5 from waflib.Configure import conf
   6
   7 @conf
   8 def SAMBA_CHECK_PYTHON(conf, mandatory=True, version=(2,6,0)):
   9     # enable tool to build python extensions
  10     if conf.env.HAVE_PYTHON_H:
  11         conf.check_python_version(version)
  12         return
  13
  14     interpreters = []
  15
  16     if conf.env['EXTRA_PYTHON']:
  17         conf.all_envs['extrapython'] = conf.env.derive()
  18         conf.setenv('extrapython')
  19         conf.env['PYTHON'] = conf.env['EXTRA_PYTHON']
  20         conf.env['IS_EXTRA_PYTHON'] = 'yes'
  21         conf.find_program('python', var='PYTHON', mandatory=True)
  22         conf.load('python')
  23         try:
  24             conf.check_python_version(version)
  25         except Exception:
  26             Logs.warn('extra-python needs to be Python %s.%s.%s or later' %
  27                       (version[0], version[1], version[2]))
  28             raise
  29         interpreters.append(conf.env['PYTHON'])
  30         conf.setenv('default')
  31
  32     conf.find_program('python3', var='PYTHON', mandatory=mandatory)
  33     conf.load('python')
  34     path_python = conf.find_program('python3')
  35
  36     conf.env.PYTHON_SPECIFIED = (conf.env.PYTHON != path_python)
  37     conf.check_python_version(version)
  38
  39     interpreters.append(conf.env['PYTHON'])
  40     conf.env.python_interpreters = interpreters
  41
  42
  43 @conf
  44 def SAMBA_CHECK_PYTHON_HEADERS(conf, mandatory=True):
  45     if conf.env.disable_python:
  46         if mandatory:
  47             raise Errors.WafError("Cannot check for python headers when "
  48                                  "--disable-python specified")
  49
  50         conf.msg("python headers", "Check disabled due to --disable-python")
  51         # we don't want PYTHONDIR in config.h, as otherwise changing
  52         # --prefix causes a complete rebuild
  53         conf.env.DEFINES = [x for x in conf.env.DEFINES
  54             if not x.startswith('PYTHONDIR=')
  55             and not x.startswith('PYTHONARCHDIR=')]
  56
  57         return
  58
  59     if conf.env["python_headers_checked"] == []:
  60         if conf.env['EXTRA_PYTHON']:
  61             conf.setenv('extrapython')
  62             _check_python_headers(conf, mandatory=True)
  63             conf.setenv('default')
  64
  65         _check_python_headers(conf, mandatory)
  66         conf.env["python_headers_checked"] = "yes"
  67
  68         if conf.env['EXTRA_PYTHON']:
  69             extraversion = conf.all_envs['extrapython']['PYTHON_VERSION']
  70             if extraversion == conf.env['PYTHON_VERSION']:
  71                 raise Errors.WafError("extrapython %s is same as main python %s" % (
  72                     extraversion, conf.env['PYTHON_VERSION']))
  73     else:
  74         conf.msg("python headers", "using cache")
  75
  76     # we don't want PYTHONDIR in config.h, as otherwise changing
  77     # --prefix causes a complete rebuild
  78     conf.env.DEFINES = [x for x in conf.env.DEFINES
  79         if not x.startswith('PYTHONDIR=')
  80         and not x.startswith('PYTHONARCHDIR=')]
  81
  82 def _check_python_headers(conf, mandatory):
  83     try:
  84         conf.errors.ConfigurationError
  85         conf.check_python_headers()
  86     except conf.errors.ConfigurationError:
  87         if mandatory:
  88              raise
  89
  90     if conf.env['PYTHON_VERSION'] > '3':
  91         abi_pattern = os.path.splitext(conf.env['pyext_PATTERN'])[0]
  92         conf.env['PYTHON_SO_ABI_FLAG'] = abi_pattern % ''
  93     else:
  94         conf.env['PYTHON_SO_ABI_FLAG'] = ''
  95     conf.env['PYTHON_LIBNAME_SO_ABI_FLAG'] = (
  96         conf.env['PYTHON_SO_ABI_FLAG'].replace('_', '-'))
  97
  98     for lib in conf.env['LINKFLAGS_PYEMBED']:
  99         if lib.startswith('-L'):
 100             conf.env.append_unique('LIBPATH_PYEMBED', lib[2:]) # strip '-L'
 101             conf.env['LINKFLAGS_PYEMBED'].remove(lib)
 102
 103     # same as in waf 1.5, keep only '-fno-strict-aliasing'
 104     # and ignore defines such as NDEBUG _FORTIFY_SOURCE=2
 105     conf.env.DEFINES_PYEXT = []
 106     conf.env.CFLAGS_PYEXT = ['-fno-strict-aliasing']
 107
 108     return
 109
 110 def PYTHON_BUILD_IS_ENABLED(self):
 111     return self.CONFIG_SET('HAVE_PYTHON_H')
 112
 113 Build.BuildContext.PYTHON_BUILD_IS_ENABLED = PYTHON_BUILD_IS_ENABLED
 114
 115
 116 def SAMBA_PYTHON(bld, name,
 117                  source='',
 118                  deps='',
 119                  public_deps='',
 120                  realname=None,
 121                  cflags='',
 122                  cflags_end=None,
 123                  includes='',
 124                  init_function_sentinel=None,
 125                  local_include=True,
 126                  vars=None,
 127                  install=True,
 128                  enabled=True):
 129     '''build a python extension for Samba'''
 130
 131     # force-disable when we can't build python modules, so
 132     # every single call doesn't need to pass this in.
 133     if not bld.PYTHON_BUILD_IS_ENABLED():
 134         enabled = False
 135
 136     if bld.env['IS_EXTRA_PYTHON']:
 137         name = 'extra-' + name
 138
 139     # when we support static python modules we'll need to gather
 140     # the list from all the SAMBA_PYTHON() targets
 141     if init_function_sentinel is not None:
 142         cflags += ' -DSTATIC_LIBPYTHON_MODULES=%s' % init_function_sentinel
 143
 144     # From https://docs.python.org/2/c-api/arg.html:
 145     # Starting with Python 2.5 the type of the length argument to
 146     # PyArg_ParseTuple(), PyArg_ParseTupleAndKeywords() and PyArg_Parse()
 147     # can be controlled by defining the macro PY_SSIZE_T_CLEAN before
 148     # including Python.h. If the macro is defined, length is a Py_ssize_t
 149     # rather than an int.
 150
 151     # Because <Python.h> if often included before includes.h/config.h
 152     # This must be in the -D compiler options
 153     cflags += ' -DPY_SSIZE_T_CLEAN=1'
 154
 155     source = bld.EXPAND_VARIABLES(source, vars=vars)
 156
 157     if realname is not None:
 158         link_name = 'python/%s' % realname
 159     else:
 160         link_name = None
 161
 162     bld.SAMBA_LIBRARY(name,
 163                       source=source,
 164                       deps=deps,
 165                       public_deps=public_deps,
 166                       includes=includes,
 167                       cflags=cflags,
 168                       cflags_end=cflags_end,
 169                       local_include=local_include,
 170                       vars=vars,
 171                       realname=realname,
 172                       link_name=link_name,
 173                       pyext=True,
 174                       target_type='PYTHON',
 175                       install_path='${PYTHONARCHDIR}',
 176                       allow_undefined_symbols=True,
 177                       install=install,
 178                       enabled=enabled)
 179
 180 Build.BuildContext.SAMBA_PYTHON = SAMBA_PYTHON
 181
 182
 183 def pyembed_libname(bld, name, extrapython=False):
 184     if bld.env['PYTHON_SO_ABI_FLAG']:
 185         return name + bld.env['PYTHON_SO_ABI_FLAG']
 186     else:
 187         return name
 188
 189 Build.BuildContext.pyembed_libname = pyembed_libname
 190
 191
 192 def gen_python_environments(bld, extra_env_vars=()):
 193     """Generate all Python environments
 194
 195     To be used in a for loop. Normally, the loop body will be executed once.
 196
 197     When --extra-python is used, the body will additionaly be executed
 198     with the extra-python environment active.
 199     """
 200     yield
 201
 202     if bld.env['EXTRA_PYTHON']:
 203         copied = ('GLOBAL_DEPENDENCIES', 'TARGET_TYPE') + tuple(extra_env_vars)
 204         for name in copied:
 205             bld.all_envs['extrapython'][name] = bld.all_envs['default'][name]
 206         default_env = bld.all_envs['default']
 207         bld.all_envs['default'] = bld.all_envs['extrapython']
 208         yield
 209         bld.all_envs['default'] = default_env
 210
 211 Build.BuildContext.gen_python_environments = gen_python_environments