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     if bld.env.DISABLE_SHARED:
  34         return True
  35     return target_in_list(name, bld.env.BUILTIN_LIBRARIES, False)
  36 Build.BuildContext.BUILTIN_LIBRARY = BUILTIN_LIBRARY
  37
  38
  39 def BUILTIN_DEFAULT(opt, builtins):
  40     '''set a comma separated default list of builtin libraries for this package'''
  41     if 'BUILTIN_LIBRARIES_DEFAULT' in Options.options:
  42         return
  43     Options.options['BUILTIN_LIBRARIES_DEFAULT'] = builtins
  44 Options.Handler.BUILTIN_DEFAULT = BUILTIN_DEFAULT
  45
  46
  47 def PRIVATE_EXTENSION_DEFAULT(opt, extension, noextension=''):
  48     '''set a default private library extension'''
  49     if 'PRIVATE_EXTENSION_DEFAULT' in Options.options:
  50         return
  51     Options.options['PRIVATE_EXTENSION_DEFAULT'] = extension
  52     Options.options['PRIVATE_EXTENSION_EXCEPTION'] = noextension
  53 Options.Handler.PRIVATE_EXTENSION_DEFAULT = PRIVATE_EXTENSION_DEFAULT
  54
  55
  56 def minimum_library_version(conf, libname, default):
  57     '''allow override of mininum system library version'''
  58
  59     minlist = Options.options.MINIMUM_LIBRARY_VERSION
  60     if not minlist:
  61         return default
  62
  63     for m in minlist.split(','):
  64         a = m.split(':')
  65         if len(a) != 2:
  66             Logs.error("Bad syntax for --minimum-library-version of %s" % m)
  67             sys.exit(1)
  68         if a[0] == libname:
  69             return a[1]
  70     return default
  71
  72
  73 @conf
  74 def LIB_MAY_BE_BUNDLED(conf, libname):
  75     return ('NONE' not in conf.env.BUNDLED_LIBS and
  76             '!%s' % libname not in conf.env.BUNDLED_LIBS)
  77
  78
  79 @conf
  80 def LIB_MUST_BE_BUNDLED(conf, libname):
  81     return ('ALL' in conf.env.BUNDLED_LIBS or
  82             libname in conf.env.BUNDLED_LIBS)
  83
  84
  85 @runonce
  86 @conf
  87 def CHECK_BUNDLED_SYSTEM(conf, libname, minversion='0.0.0',
  88                          checkfunctions=None, headers=None,
  89                          onlyif=None, implied_deps=None,
  90                          require_headers=True):
  91     '''check if a library is available as a system library.
  92     this first tries via pkg-config, then if that fails
  93     tries by testing for a specified function in the specified lib
  94     '''
  95     if conf.LIB_MUST_BE_BUNDLED(libname):
  96         return False
  97     found = 'FOUND_SYSTEMLIB_%s' % libname
  98     if found in conf.env:
  99         return conf.env[found]
 100
 101     def check_functions_headers():
 102         '''helper function for CHECK_BUNDLED_SYSTEM'''
 103         if checkfunctions is None:
 104             return True
 105         if require_headers and headers and not conf.CHECK_HEADERS(headers, lib=libname):
 106             return False
 107         return conf.CHECK_FUNCS_IN(checkfunctions, libname, headers=headers,
 108                                    empty_decl=False, set_target=False)
 109
 110     # see if the library should only use a system version if another dependent
 111     # system version is found. That prevents possible use of mixed library
 112     # versions
 113     if onlyif:
 114         for syslib in TO_LIST(onlyif):
 115             f = 'FOUND_SYSTEMLIB_%s' % syslib
 116             if not f in conf.env:
 117                 if not conf.LIB_MAY_BE_BUNDLED(libname):
 118                     Logs.error('ERROR: Use of system library %s depends on missing system library %s' % (libname, syslib))
 119                     sys.exit(1)
 120                 conf.env[found] = False
 121                 return False
 122
 123     minversion = minimum_library_version(conf, libname, minversion)
 124
 125     msg = 'Checking for system %s' % libname
 126     if minversion != '0.0.0':
 127         msg += ' >= %s' % minversion
 128
 129     # try pkgconfig first
 130     if (conf.check_cfg(package=libname,
 131                       args='"%s >= %s" --cflags --libs' % (libname, minversion),
 132                       msg=msg) and
 133         check_functions_headers()):
 134         conf.SET_TARGET_TYPE(libname, 'SYSLIB')
 135         conf.env[found] = True
 136         if implied_deps:
 137             conf.SET_SYSLIB_DEPS(libname, implied_deps)
 138         return True
 139     if checkfunctions is not None:
 140         if check_functions_headers():
 141             conf.env[found] = True
 142             if implied_deps:
 143                 conf.SET_SYSLIB_DEPS(libname, implied_deps)
 144             conf.SET_TARGET_TYPE(libname, 'SYSLIB')
 145             return True
 146     conf.env[found] = False
 147     if not conf.LIB_MAY_BE_BUNDLED(libname):
 148         Logs.error('ERROR: System library %s of version %s not found, and bundling disabled' % (libname, minversion))
 149         sys.exit(1)
 150     return False
 151
 152
 153 @runonce
 154 @conf
 155 def CHECK_BUNDLED_SYSTEM_PYTHON(conf, libname, modulename, minversion='0.0.0'):
 156     '''check if a python module is available on the system and
 157     has the specified minimum version.
 158     '''
 159     if conf.LIB_MUST_BE_BUNDLED(libname):
 160         return False
 161
 162     # see if the library should only use a system version if another dependent
 163     # system version is found. That prevents possible use of mixed library
 164     # versions
 165     minversion = minimum_library_version(conf, libname, minversion)
 166
 167     try:
 168         m = __import__(modulename)
 169     except ImportError:
 170         found = False
 171     else:
 172         try:
 173             version = m.__version__
 174         except AttributeError:
 175             found = False
 176         else:
 177             found = tuple(version.split(".")) >= tuple(minversion.split("."))
 178     if not found and not conf.LIB_MAY_BE_BUNDLED(libname):
 179         Logs.error('ERROR: Python module %s of version %s not found, and bundling disabled' % (libname, minversion))
 180         sys.exit(1)
 181     return found
 182
 183
 184 def NONSHARED_BINARY(bld, name):
 185     '''return True if a binary should be built without non-system shared libs'''
 186     if bld.env.DISABLE_SHARED:
 187         return True
 188     return target_in_list(name, bld.env.NONSHARED_BINARIES, False)
 189 Build.BuildContext.NONSHARED_BINARY = NONSHARED_BINARY
 190
 191