buildtools/wafsamba/samba_bundled.py

   1 # functions to support bundled libraries
   2
   3 from Configure import conf
   4 import sys, Logs
   5 from samba_utils import *
   6
   7 def PRIVATE_NAME(bld, name, private_extension, private_library):
   8     '''possibly rename a library to include a bundled extension'''
   9
  10     # we now use the same private name for libraries as the public name.
  11     # see http://git.samba.org/?p=tridge/junkcode.git;a=tree;f=shlib for a
  12     # demonstration that this is the right thing to do
  13     # also see http://lists.samba.org/archive/samba-technical/2011-January/075816.html
  14     return name
  15
  16
  17 def target_in_list(target, lst, default):
  18     for l in lst:
  19         if target == l:
  20             return True
  21         if '!' + target == l:
  22             return False
  23         if l == 'ALL':
  24             return True
  25         if l == 'NONE':
  26             return False
  27     return default
  28
  29
  30 def BUILTIN_LIBRARY(bld, name):
  31     '''return True if a library should be builtin
  32        instead of being built as a shared lib'''
  33     return target_in_list(name, bld.env.BUILTIN_LIBRARIES, False)
  34 Build.BuildContext.BUILTIN_LIBRARY = BUILTIN_LIBRARY
  35
  36
  37 def BUILTIN_DEFAULT(opt, builtins):
  38     '''set a comma separated default list of builtin libraries for this package'''
  39     if 'BUILTIN_LIBRARIES_DEFAULT' in Options.options:
  40         return
  41     Options.options['BUILTIN_LIBRARIES_DEFAULT'] = builtins
  42 Options.Handler.BUILTIN_DEFAULT = BUILTIN_DEFAULT
  43
  44
  45 def PRIVATE_EXTENSION_DEFAULT(opt, extension, noextension=''):
  46     '''set a default private library extension'''
  47     if 'PRIVATE_EXTENSION_DEFAULT' in Options.options:
  48         return
  49     Options.options['PRIVATE_EXTENSION_DEFAULT'] = extension
  50     Options.options['PRIVATE_EXTENSION_EXCEPTION'] = noextension
  51 Options.Handler.PRIVATE_EXTENSION_DEFAULT = PRIVATE_EXTENSION_DEFAULT
  52
  53
  54 def minimum_library_version(conf, libname, default):
  55     '''allow override of mininum system library version'''
  56
  57     minlist = Options.options.MINIMUM_LIBRARY_VERSION
  58     if not minlist:
  59         return default
  60
  61     for m in minlist.split(','):
  62         a = m.split(':')
  63         if len(a) != 2:
  64             Logs.error("Bad syntax for --minimum-library-version of %s" % m)
  65             sys.exit(1)
  66         if a[0] == libname:
  67             return a[1]
  68     return default
  69
  70
  71 @conf
  72 def LIB_MAY_BE_BUNDLED(conf, libname):
  73     if libname in conf.env.BUNDLED_LIBS:
  74         return True
  75     if '!%s' % libname in conf.env.BUNDLED_LIBS:
  76         return False
  77     if 'NONE' in conf.env.BUNDLED_LIBS:
  78         return False
  79     return True
  80
  81 @conf
  82 def LIB_MUST_BE_BUNDLED(conf, libname):
  83     if libname in conf.env.BUNDLED_LIBS:
  84         return True
  85     if '!%s' % libname in conf.env.BUNDLED_LIBS:
  86         return False
  87     if 'ALL' in conf.env.BUNDLED_LIBS:
  88         return True
  89     return False
  90
  91 @conf
  92 def LIB_MUST_BE_PRIVATE(conf, libname):
  93     return ('ALL' in conf.env.PRIVATE_LIBS or
  94             libname in conf.env.PRIVATE_LIBS)
  95
  96 @conf
  97 def CHECK_PREREQUISITES(conf, prereqs):
  98     missing = []
  99     for syslib in TO_LIST(prereqs):
 100         f = 'FOUND_SYSTEMLIB_%s' % syslib
 101         if not f in conf.env:
 102             missing.append(syslib)
 103     return missing
 104
 105
 106 @runonce
 107 @conf
 108 def CHECK_BUNDLED_SYSTEM_PKG(conf, libname, minversion='0.0.0',
 109         onlyif=None, implied_deps=None, pkg=None):
 110     '''check if a library is available as a system library.
 111
 112     This only tries using pkg-config
 113     '''
 114     return conf.CHECK_BUNDLED_SYSTEM(libname,
 115                                      minversion=minversion,
 116                                      onlyif=onlyif,
 117                                      implied_deps=implied_deps,
 118                                      pkg=pkg)
 119
 120 @runonce
 121 @conf
 122 def CHECK_BUNDLED_SYSTEM(conf, libname, minversion='0.0.0',
 123                          checkfunctions=None, headers=None, checkcode=None,
 124                          onlyif=None, implied_deps=None,
 125                          require_headers=True, pkg=None, set_target=True):
 126     '''check if a library is available as a system library.
 127     this first tries via pkg-config, then if that fails
 128     tries by testing for a specified function in the specified lib
 129     '''
 130     if conf.LIB_MUST_BE_BUNDLED(libname):
 131         return False
 132     found = 'FOUND_SYSTEMLIB_%s' % libname
 133     if found in conf.env:
 134         return conf.env[found]
 135
 136     def check_functions_headers_code():
 137         '''helper function for CHECK_BUNDLED_SYSTEM'''
 138         if require_headers and headers and not conf.CHECK_HEADERS(headers, lib=libname):
 139             return False
 140         if checkfunctions is not None:
 141             ok = conf.CHECK_FUNCS_IN(checkfunctions, libname, headers=headers,
 142                                      empty_decl=False, set_target=False)
 143             if not ok:
 144                 return False
 145         if checkcode is not None:
 146             define='CHECK_BUNDLED_SYSTEM_%s' % libname.upper()
 147             ok = conf.CHECK_CODE(checkcode, lib=libname,
 148                                  headers=headers, local_include=False,
 149                                  msg=msg, define=define)
 150             conf.CONFIG_RESET(define)
 151             if not ok:
 152                 return False
 153         return True
 154
 155
 156     # see if the library should only use a system version if another dependent
 157     # system version is found. That prevents possible use of mixed library
 158     # versions
 159     if onlyif:
 160         missing = conf.CHECK_PREREQUISITES(onlyif)
 161         if missing:
 162             if not conf.LIB_MAY_BE_BUNDLED(libname):
 163                 Logs.error('ERROR: Use of system library %s depends on missing system library/libraries %r' % (libname, missing))
 164                 sys.exit(1)
 165             conf.env[found] = False
 166             return False
 167
 168     minversion = minimum_library_version(conf, libname, minversion)
 169
 170     msg = 'Checking for system %s' % libname
 171     if minversion != '0.0.0':
 172         msg += ' >= %s' % minversion
 173
 174     uselib_store=libname.upper()
 175     if pkg is None:
 176         pkg = libname
 177
 178     # try pkgconfig first
 179     if (conf.check_cfg(package=pkg,
 180                       args='"%s >= %s" --cflags --libs' % (pkg, minversion),
 181                       msg=msg, uselib_store=uselib_store) and
 182         check_functions_headers_code()):
 183         if set_target:
 184             conf.SET_TARGET_TYPE(libname, 'SYSLIB')
 185         conf.env[found] = True
 186         if implied_deps:
 187             conf.SET_SYSLIB_DEPS(libname, implied_deps)
 188         return True
 189     if checkfunctions is not None:
 190         if check_functions_headers_code():
 191             conf.env[found] = True
 192             if implied_deps:
 193                 conf.SET_SYSLIB_DEPS(libname, implied_deps)
 194             if set_target:
 195                 conf.SET_TARGET_TYPE(libname, 'SYSLIB')
 196             return True
 197     conf.env[found] = False
 198     if not conf.LIB_MAY_BE_BUNDLED(libname):
 199         Logs.error('ERROR: System library %s of version %s not found, and bundling disabled' % (libname, minversion))
 200         sys.exit(1)
 201     return False
 202
 203
 204 def tuplize_version(version):
 205     return tuple([int(x) for x in version.split(".")])
 206
 207 @runonce
 208 @conf
 209 def CHECK_BUNDLED_SYSTEM_PYTHON(conf, libname, modulename, minversion='0.0.0'):
 210     '''check if a python module is available on the system and
 211     has the specified minimum version.
 212     '''
 213     if conf.LIB_MUST_BE_BUNDLED(libname):
 214         return False
 215
 216     # see if the library should only use a system version if another dependent
 217     # system version is found. That prevents possible use of mixed library
 218     # versions
 219     minversion = minimum_library_version(conf, libname, minversion)
 220
 221     try:
 222         m = __import__(modulename)
 223     except ImportError:
 224         found = False
 225     else:
 226         try:
 227             version = m.__version__
 228         except AttributeError:
 229             found = False
 230         else:
 231             found = tuplize_version(version) >= tuplize_version(minversion)
 232     if not found and not conf.LIB_MAY_BE_BUNDLED(libname):
 233         Logs.error('ERROR: Python module %s of version %s not found, and bundling disabled' % (libname, minversion))
 234         sys.exit(1)
 235     return found
 236
 237
 238 def NONSHARED_BINARY(bld, name):
 239     '''return True if a binary should be built without non-system shared libs'''
 240     return target_in_list(name, bld.env.NONSHARED_BINARIES, False)
 241 Build.BuildContext.NONSHARED_BINARY = NONSHARED_BINARY
 242
 243