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, version=(3,5,0)):
   9
  10     if conf.env.disable_python:
  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',
  21                       mandatory=not conf.env.disable_python)
  22     conf.load('python')
  23     path_python = conf.find_program('python3')
  24
  25     conf.env.PYTHON_SPECIFIED = (conf.env.PYTHON != path_python)
  26     conf.check_python_version(version)
  27
  28     interpreters.append(conf.env['PYTHON'])
  29     conf.env.python_interpreters = interpreters
  30
  31
  32 @conf
  33 def SAMBA_CHECK_PYTHON_HEADERS(conf):
  34     if conf.env.disable_python:
  35
  36         conf.msg("python headers", "Check disabled due to --disable-python")
  37         # we don't want PYTHONDIR in config.h, as otherwise changing
  38         # --prefix causes a complete rebuild
  39         conf.env.DEFINES = [x for x in conf.env.DEFINES
  40             if not x.startswith('PYTHONDIR=')
  41             and not x.startswith('PYTHONARCHDIR=')]
  42
  43         return
  44
  45     if conf.env["python_headers_checked"] == []:
  46         _check_python_headers(conf)
  47         conf.env["python_headers_checked"] = "yes"
  48
  49     else:
  50         conf.msg("python headers", "using cache")
  51
  52     # we don't want PYTHONDIR in config.h, as otherwise changing
  53     # --prefix causes a complete rebuild
  54     conf.env.DEFINES = [x for x in conf.env.DEFINES
  55         if not x.startswith('PYTHONDIR=')
  56         and not x.startswith('PYTHONARCHDIR=')]
  57
  58 def _check_python_headers(conf):
  59     conf.check_python_headers()
  60
  61     if conf.env['PYTHON_VERSION'] > '3':
  62         abi_pattern = os.path.splitext(conf.env['pyext_PATTERN'])[0]
  63         conf.env['PYTHON_SO_ABI_FLAG'] = abi_pattern % ''
  64     else:
  65         conf.env['PYTHON_SO_ABI_FLAG'] = ''
  66     conf.env['PYTHON_LIBNAME_SO_ABI_FLAG'] = (
  67         conf.env['PYTHON_SO_ABI_FLAG'].replace('_', '-'))
  68
  69     for lib in conf.env['LINKFLAGS_PYEMBED']:
  70         if lib.startswith('-L'):
  71             conf.env.append_unique('LIBPATH_PYEMBED', lib[2:]) # strip '-L'
  72             conf.env['LINKFLAGS_PYEMBED'].remove(lib)
  73
  74     # same as in waf 1.5, keep only '-fno-strict-aliasing'
  75     # and ignore defines such as NDEBUG _FORTIFY_SOURCE=2
  76     conf.env.DEFINES_PYEXT = []
  77     conf.env.CFLAGS_PYEXT = ['-fno-strict-aliasing']
  78
  79     return
  80
  81 def PYTHON_BUILD_IS_ENABLED(self):
  82     return self.CONFIG_SET('HAVE_PYTHON_H')
  83
  84 Build.BuildContext.PYTHON_BUILD_IS_ENABLED = PYTHON_BUILD_IS_ENABLED
  85
  86
  87 def SAMBA_PYTHON(bld, name,
  88                  source='',
  89                  deps='',
  90                  public_deps='',
  91                  realname=None,
  92                  cflags='',
  93                  cflags_end=None,
  94                  includes='',
  95                  init_function_sentinel=None,
  96                  local_include=True,
  97                  vars=None,
  98                  install=True,
  99                  enabled=True):
 100     '''build a python extension for Samba'''
 101
 102     # force-disable when we can't build python modules, so
 103     # every single call doesn't need to pass this in.
 104     if not bld.PYTHON_BUILD_IS_ENABLED():
 105         enabled = False
 106
 107     # Save time, no need to build python bindings when fuzzing
 108     if bld.env.enable_fuzzing:
 109         enabled = False
 110
 111     # when we support static python modules we'll need to gather
 112     # the list from all the SAMBA_PYTHON() targets
 113     if init_function_sentinel is not None:
 114         cflags += ' -DSTATIC_LIBPYTHON_MODULES=%s' % init_function_sentinel
 115
 116     # From https://docs.python.org/2/c-api/arg.html:
 117     # Starting with Python 2.5 the type of the length argument to
 118     # PyArg_ParseTuple(), PyArg_ParseTupleAndKeywords() and PyArg_Parse()
 119     # can be controlled by defining the macro PY_SSIZE_T_CLEAN before
 120     # including Python.h. If the macro is defined, length is a Py_ssize_t
 121     # rather than an int.
 122
 123     # Because <Python.h> if often included before includes.h/config.h
 124     # This must be in the -D compiler options
 125     cflags += ' -DPY_SSIZE_T_CLEAN=1'
 126
 127     source = bld.EXPAND_VARIABLES(source, vars=vars)
 128
 129     if realname is not None:
 130         link_name = 'python/%s' % realname
 131     else:
 132         link_name = None
 133
 134     bld.SAMBA_LIBRARY(name,
 135                       source=source,
 136                       deps=deps,
 137                       public_deps=public_deps,
 138                       includes=includes,
 139                       cflags=cflags,
 140                       cflags_end=cflags_end,
 141                       local_include=local_include,
 142                       vars=vars,
 143                       realname=realname,
 144                       link_name=link_name,
 145                       pyext=True,
 146                       target_type='PYTHON',
 147                       install_path='${PYTHONARCHDIR}',
 148                       allow_undefined_symbols=True,
 149                       install=install,
 150                       enabled=enabled)
 151
 152 Build.BuildContext.SAMBA_PYTHON = SAMBA_PYTHON
 153
 154
 155 def pyembed_libname(bld, name):
 156     if bld.env['PYTHON_SO_ABI_FLAG']:
 157         return name + bld.env['PYTHON_SO_ABI_FLAG']
 158     else:
 159         return name
 160
 161 Build.BuildContext.pyembed_libname = pyembed_libname
 162
 163