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