buildtools/wafsamba/samba_python.py

   1 # waf build tool for building IDL files with pidl
   2
   3 import os
   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=(2,4,2)):
   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((3, 3, 0))
  25         except Exception:
  26             Logs.warn('extra-python needs to be Python 3.3 or later')
  27             raise
  28         interpreters.append(conf.env['PYTHON'])
  29         conf.setenv('default')
  30
  31     conf.find_program('python', var='PYTHON', mandatory=mandatory)
  32     conf.load('python')
  33     path_python = conf.find_program('python')
  34     conf.env.PYTHON_SPECIFIED = (conf.env.PYTHON != path_python)
  35     conf.check_python_version(version)
  36
  37     interpreters.append(conf.env['PYTHON'])
  38     conf.env.python_interpreters = interpreters
  39
  40
  41 @conf
  42 def SAMBA_CHECK_PYTHON_HEADERS(conf, mandatory=True):
  43     if conf.env.disable_python:
  44         if mandatory:
  45             raise Errors.WafError("Cannot check for python headers when "
  46                                  "--disable-python specified")
  47
  48         conf.msg("python headers", "Check disabled due to --disable-python")
  49         # we don't want PYTHONDIR in config.h, as otherwise changing
  50         # --prefix causes a complete rebuild
  51         conf.env.DEFINES = [x for x in conf.env.DEFINES
  52             if not x.startswith('PYTHONDIR=')
  53             and not x.startswith('PYTHONARCHDIR=')]
  54
  55         return
  56
  57     if conf.env["python_headers_checked"] == []:
  58         if conf.env['EXTRA_PYTHON']:
  59             conf.setenv('extrapython')
  60             _check_python_headers(conf, mandatory=True)
  61             conf.setenv('default')
  62
  63         _check_python_headers(conf, mandatory)
  64         conf.env["python_headers_checked"] = "yes"
  65
  66         if conf.env['EXTRA_PYTHON']:
  67             extraversion = conf.all_envs['extrapython']['PYTHON_VERSION']
  68             if extraversion == conf.env['PYTHON_VERSION']:
  69                 raise Errors.WafError("extrapython %s is same as main python %s" % (
  70                     extraversion, conf.env['PYTHON_VERSION']))
  71     else:
  72         conf.msg("python headers", "using cache")
  73
  74     # we don't want PYTHONDIR in config.h, as otherwise changing
  75     # --prefix causes a complete rebuild
  76     conf.env.DEFINES = [x for x in conf.env.DEFINES
  77         if not x.startswith('PYTHONDIR=')
  78         and not x.startswith('PYTHONARCHDIR=')]
  79
  80 def _check_python_headers(conf, mandatory):
  81     try:
  82         conf.errors.ConfigurationError
  83         conf.check_python_headers()
  84     except conf.errors.ConfigurationError:
  85         if mandatory:
  86              raise
  87
  88     if conf.env['PYTHON_VERSION'] > '3':
  89         abi_pattern = os.path.splitext(conf.env['pyext_PATTERN'])[0]
  90         conf.env['PYTHON_SO_ABI_FLAG'] = abi_pattern % ''
  91     else:
  92         conf.env['PYTHON_SO_ABI_FLAG'] = ''
  93     conf.env['PYTHON_LIBNAME_SO_ABI_FLAG'] = (
  94         conf.env['PYTHON_SO_ABI_FLAG'].replace('_', '-'))
  95
  96     for lib in conf.env['LINKFLAGS_PYEMBED']:
  97         if lib.startswith('-L'):
  98             conf.env.append_unique('LIBPATH_PYEMBED', lib[2:]) # strip '-L'
  99             conf.env['LINKFLAGS_PYEMBED'].remove(lib)
 100
 101     # same as in waf 1.5, keep only '-fno-strict-aliasing'
 102     # and ignore defines such as NDEBUG _FORTIFY_SOURCE=2
 103     conf.env.DEFINES_PYEXT = []
 104     conf.env.CFLAGS_PYEXT = ['-fno-strict-aliasing']
 105
 106     return
 107
 108 def PYTHON_BUILD_IS_ENABLED(self):
 109     return self.CONFIG_SET('HAVE_PYTHON_H')
 110
 111 Build.BuildContext.PYTHON_BUILD_IS_ENABLED = PYTHON_BUILD_IS_ENABLED
 112
 113
 114 def SAMBA_PYTHON(bld, name,
 115                  source='',
 116                  deps='',
 117                  public_deps='',
 118                  realname=None,
 119                  cflags='',
 120                  cflags_end=None,
 121                  includes='',
 122                  init_function_sentinel=None,
 123                  local_include=True,
 124                  vars=None,
 125                  install=True,
 126                  enabled=True):
 127     '''build a python extension for Samba'''
 128
 129     # force-disable when we can't build python modules, so
 130     # every single call doesn't need to pass this in.
 131     if not bld.PYTHON_BUILD_IS_ENABLED():
 132         enabled = False
 133
 134     if bld.env['IS_EXTRA_PYTHON']:
 135         name = 'extra-' + name
 136
 137     # when we support static python modules we'll need to gather
 138     # the list from all the SAMBA_PYTHON() targets
 139     if init_function_sentinel is not None:
 140         cflags += ' -DSTATIC_LIBPYTHON_MODULES=%s' % init_function_sentinel
 141
 142     # From https://docs.python.org/2/c-api/arg.html:
 143     # Starting with Python 2.5 the type of the length argument to
 144     # PyArg_ParseTuple(), PyArg_ParseTupleAndKeywords() and PyArg_Parse()
 145     # can be controlled by defining the macro PY_SSIZE_T_CLEAN before
 146     # including Python.h. If the macro is defined, length is a Py_ssize_t
 147     # rather than an int.
 148
 149     # Because <Python.h> if often included before includes.h/config.h
 150     # This must be in the -D compiler options
 151     cflags += ' -DPY_SSIZE_T_CLEAN=1'
 152
 153     source = bld.EXPAND_VARIABLES(source, vars=vars)
 154
 155     if realname is not None:
 156         link_name = 'python/%s' % realname
 157     else:
 158         link_name = None
 159
 160     bld.SAMBA_LIBRARY(name,
 161                       source=source,
 162                       deps=deps,
 163                       public_deps=public_deps,
 164                       includes=includes,
 165                       cflags=cflags,
 166                       cflags_end=cflags_end,
 167                       local_include=local_include,
 168                       vars=vars,
 169                       realname=realname,
 170                       link_name=link_name,
 171                       pyext=True,
 172                       target_type='PYTHON',
 173                       install_path='${PYTHONARCHDIR}',
 174                       allow_undefined_symbols=True,
 175                       install=install,
 176                       enabled=enabled)
 177
 178 Build.BuildContext.SAMBA_PYTHON = SAMBA_PYTHON
 179
 180
 181 def pyembed_libname(bld, name, extrapython=False):
 182     if bld.env['PYTHON_SO_ABI_FLAG']:
 183         return name + bld.env['PYTHON_SO_ABI_FLAG']
 184     else:
 185         return name
 186
 187 Build.BuildContext.pyembed_libname = pyembed_libname
 188
 189
 190 def gen_python_environments(bld, extra_env_vars=()):
 191     """Generate all Python environments
 192
 193     To be used in a for loop. Normally, the loop body will be executed once.
 194
 195     When --extra-python is used, the body will additionaly be executed
 196     with the extra-python environment active.
 197     """
 198     yield
 199
 200     if bld.env['EXTRA_PYTHON']:
 201         copied = ('GLOBAL_DEPENDENCIES', 'TARGET_TYPE') + tuple(extra_env_vars)
 202         for name in copied:
 203             bld.all_envs['extrapython'][name] = bld.all_envs['default'][name]
 204         default_env = bld.all_envs['default']
 205         bld.all_envs['default'] = bld.all_envs['extrapython']
 206         yield
 207         bld.all_envs['default'] = default_env
 208
 209 Build.BuildContext.gen_python_environments = gen_python_environments