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