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[samba.git] / 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     # when we support static python modules we'll need to gather
108     # the list from all the SAMBA_PYTHON() targets
109     if init_function_sentinel is not None:
110         cflags += ' -DSTATIC_LIBPYTHON_MODULES=%s' % init_function_sentinel
111
112     # From https://docs.python.org/2/c-api/arg.html:
113     # Starting with Python 2.5 the type of the length argument to
114     # PyArg_ParseTuple(), PyArg_ParseTupleAndKeywords() and PyArg_Parse()
115     # can be controlled by defining the macro PY_SSIZE_T_CLEAN before
116     # including Python.h. If the macro is defined, length is a Py_ssize_t
117     # rather than an int.
118
119     # Because <Python.h> if often included before includes.h/config.h
120     # This must be in the -D compiler options
121     cflags += ' -DPY_SSIZE_T_CLEAN=1'
122
123     source = bld.EXPAND_VARIABLES(source, vars=vars)
124
125     if realname is not None:
126         link_name = 'python/%s' % realname
127     else:
128         link_name = None
129
130     bld.SAMBA_LIBRARY(name,
131                       source=source,
132                       deps=deps,
133                       public_deps=public_deps,
134                       includes=includes,
135                       cflags=cflags,
136                       cflags_end=cflags_end,
137                       local_include=local_include,
138                       vars=vars,
139                       realname=realname,
140                       link_name=link_name,
141                       pyext=True,
142                       target_type='PYTHON',
143                       install_path='${PYTHONARCHDIR}',
144                       allow_undefined_symbols=True,
145                       install=install,
146                       enabled=enabled)
147
148 Build.BuildContext.SAMBA_PYTHON = SAMBA_PYTHON
149
150
151 def pyembed_libname(bld, name):
152     if bld.env['PYTHON_SO_ABI_FLAG']:
153         return name + bld.env['PYTHON_SO_ABI_FLAG']
154     else:
155         return name
156
157 Build.BuildContext.pyembed_libname = pyembed_libname
158
159