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=(3,6,0)):
   9
  10     # enable tool to build python extensions
  11     if conf.env.HAVE_PYTHON_H:
  12         conf.check_python_version(version)
  13         return
  14
  15     interpreters = []
  16
  17     conf.find_program('python3', var='PYTHON',
  18                       mandatory=not conf.env.disable_python)
  19     conf.load('python')
  20     path_python = conf.find_program('python3')
  21
  22     conf.env.PYTHON_SPECIFIED = (conf.env.PYTHON != path_python)
  23     conf.check_python_version(version)
  24
  25     interpreters.append(conf.env['PYTHON'])
  26     conf.env.python_interpreters = interpreters
  27
  28
  29 @conf
  30 def SAMBA_CHECK_PYTHON_HEADERS(conf):
  31     if conf.env.disable_python:
  32
  33         conf.msg("python headers", "Check disabled due to --disable-python")
  34         # we don't want PYTHONDIR in config.h, as otherwise changing
  35         # --prefix causes a complete rebuild
  36         conf.env.DEFINES = [x for x in conf.env.DEFINES
  37             if not x.startswith('PYTHONDIR=')
  38             and not x.startswith('PYTHONARCHDIR=')]
  39
  40         return
  41
  42     if conf.env["python_headers_checked"] == []:
  43         _check_python_headers(conf)
  44         conf.env["python_headers_checked"] = "yes"
  45
  46     else:
  47         conf.msg("python headers", "using cache")
  48
  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 def _check_python_headers(conf):
  56     conf.check_python_headers()
  57
  58     abi_pattern = os.path.splitext(conf.env['pyext_PATTERN'])[0]
  59     conf.env['PYTHON_SO_ABI_FLAG'] = abi_pattern % ''
  60     conf.env['PYTHON_LIBNAME_SO_ABI_FLAG'] = (
  61         conf.env['PYTHON_SO_ABI_FLAG'].replace('_', '-'))
  62
  63     for lib in conf.env['LINKFLAGS_PYEMBED']:
  64         if lib.startswith('-L'):
  65             conf.env.append_unique('LIBPATH_PYEMBED', lib[2:]) # strip '-L'
  66             conf.env['LINKFLAGS_PYEMBED'].remove(lib)
  67
  68     # same as in waf 1.5, keep only '-fno-strict-aliasing'
  69     # and ignore defines such as NDEBUG _FORTIFY_SOURCE=2
  70     conf.env.DEFINES_PYEXT = []
  71     conf.env.CFLAGS_PYEXT = ['-fno-strict-aliasing']
  72
  73     return
  74
  75 def PYTHON_BUILD_IS_ENABLED(self):
  76     return self.CONFIG_SET('HAVE_PYTHON_H')
  77
  78 Build.BuildContext.PYTHON_BUILD_IS_ENABLED = PYTHON_BUILD_IS_ENABLED
  79
  80
  81 def SAMBA_PYTHON(bld, name,
  82                  source='',
  83                  deps='',
  84                  public_deps='',
  85                  realname=None,
  86                  cflags='',
  87                  cflags_end=None,
  88                  includes='',
  89                  init_function_sentinel=None,
  90                  local_include=True,
  91                  vars=None,
  92                  install=True,
  93                  enabled=True):
  94     '''build a python extension for Samba'''
  95
  96     # force-disable when we can't build python modules, so
  97     # every single call doesn't need to pass this in.
  98     if not bld.PYTHON_BUILD_IS_ENABLED():
  99         enabled = False
 100
 101     # Save time, no need to build python bindings when fuzzing
 102     if bld.env.enable_fuzzing:
 103         enabled = False
 104
 105     # when we support static python modules we'll need to gather
 106     # the list from all the SAMBA_PYTHON() targets
 107     if init_function_sentinel is not None:
 108         cflags += ' -DSTATIC_LIBPYTHON_MODULES=%s' % init_function_sentinel
 109
 110     # From https://docs.python.org/2/c-api/arg.html:
 111     # Starting with Python 2.5 the type of the length argument to
 112     # PyArg_ParseTuple(), PyArg_ParseTupleAndKeywords() and PyArg_Parse()
 113     # can be controlled by defining the macro PY_SSIZE_T_CLEAN before
 114     # including Python.h. If the macro is defined, length is a Py_ssize_t
 115     # rather than an int.
 116
 117     # Because <Python.h> if often included before includes.h/config.h
 118     # This must be in the -D compiler options
 119     cflags += ' -DPY_SSIZE_T_CLEAN=1'
 120
 121     source = bld.EXPAND_VARIABLES(source, vars=vars)
 122
 123     if realname is not None:
 124         link_name = 'python/%s' % realname
 125     else:
 126         link_name = None
 127
 128     bld.SAMBA_LIBRARY(name,
 129                       source=source,
 130                       deps=deps,
 131                       public_deps=public_deps,
 132                       includes=includes,
 133                       cflags=cflags,
 134                       cflags_end=cflags_end,
 135                       local_include=local_include,
 136                       vars=vars,
 137                       realname=realname,
 138                       link_name=link_name,
 139                       pyext=True,
 140                       target_type='PYTHON',
 141                       install_path='${PYTHONARCHDIR}',
 142                       allow_undefined_symbols=True,
 143                       install=install,
 144                       enabled=enabled)
 145
 146 Build.BuildContext.SAMBA_PYTHON = SAMBA_PYTHON
 147
 148
 149 def pyembed_libname(bld, name):
 150     if bld.env['PYTHON_SO_ABI_FLAG']:
 151         return name + bld.env['PYTHON_SO_ABI_FLAG']
 152     else:
 153         return name
 154
 155 Build.BuildContext.pyembed_libname = pyembed_libname
 156
 157