libffado/admin/pkgconfig.py

   1 #!/usr/bin/python
   2 #
   3 # Copyright (C) 2007-2008 Arnold Krille
   4 #
   5 # This file is part of FFADO
   6 # FFADO = Free Firewire (pro-)audio drivers for linux
   7 #
   8 # FFADO is based upon FreeBoB.
   9 #
  10 # This program is free software: you can redistribute it and/or modify
  11 # it under the terms of the GNU General Public License as published by
  12 # the Free Software Foundation, either version 2 of the License, or
  13 # (at your option) version 3 of the License.
  14 #
  15 # This program is distributed in the hope that it will be useful,
  16 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 # GNU General Public License for more details.
  19 #
  20 # You should have received a copy of the GNU General Public License
  21 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  22 #
  23
  24 #
  25 # Taken from http://www.scons.org/wiki/UsingPkgConfig
  26 # and heavily modified
  27 #
  28
  29 import subprocess
  30
  31 #
  32 # Checks for pkg-config
  33 #
  34 def CheckForPKGConfig( context, version='0.0.0' ):
  35         context.Message( "Checking for pkg-config (at least version %s)... " % version )
  36         ret = context.TryAction( "pkg-config --atleast-pkgconfig-version=%s" %version )[0]
  37         context.Result( ret )
  38         return ret
  39
  40 #
  41 # Checks for the given package with an optional version-requirement
  42 #
  43 # The flags (which can be imported into the environment by env.MergeFlags(...)
  44 # are exported as env['NAME_FLAGS'] where name is built by removing all +,-,.
  45 # and upper-casing.
  46 #
  47 def CheckForPKG( context, name, version="" ):
  48         name2 = name.replace("+","").replace(".","").replace("-","")
  49
  50         if version == "":
  51                 context.Message( "Checking for %s... \t" % name )
  52                 ret = context.TryAction( "pkg-config --exists '%s'" % name )[0]
  53         else:
  54                 context.Message( "Checking for %s (%s or higher)... \t" % (name,version) )
  55                 ret = context.TryAction( "pkg-config --atleast-version=%s '%s'" % (version,name) )[0]
  56
  57         if ret:
  58                 context.env['%s_FLAGS' % name2.upper()] = context.env.ParseFlags("!pkg-config --cflags --libs %s" % name)
  59
  60         context.Result( ret )
  61         return ret
  62
  63 #
  64 # Checks for the existance of the package and returns the packages flags.
  65 #
  66 # This should allow caching of the flags so that pkg-config is called only once.
  67 #
  68 def GetPKGFlags( context, name, version="" ):
  69         import os
  70
  71         if version == "":
  72                 context.Message( "Checking for %s... \t" % name )
  73                 ret = context.TryAction( "pkg-config --exists '%s'" % name )[0]
  74         else:
  75                 context.Message( "Checking for %s (%s or higher)... \t" % (name,version) )
  76                 ret = context.TryAction( "pkg-config --atleast-version=%s '%s'" % (version,name) )[0]
  77
  78         if not ret:
  79                 context.Result( ret )
  80                 return ret
  81
  82         out = subprocess.Popen(['pkg-config', '--cflags', '--libs', name], stdout=subprocess.PIPE)
  83         ret = out.stdout.read()
  84
  85         context.Result( True )
  86         return ret
  87
  88 #
  89 # Checks for the existance of the package and returns the value of the specified variable.
  90 #
  91 def GetPKGVariable( context, name, variable ):
  92         import os
  93
  94         context.Message( "Checking for variable %s in package %s... \t" % (variable,name) )
  95
  96         ret = context.TryAction( "pkg-config --exists '%s'" % name )[0]
  97         if not ret:
  98                 context.Result( ret )
  99                 return ret
 100
 101         out = subprocess.Popen(['pkg-config', '--variable=%s' % variable, name], stdout=subprocess.PIPE)
 102         ret = out.stdout.read()
 103
 104         context.Result( True )
 105         return ret
 106
 107 def generate( env, **kw ):
 108         env['PKGCONFIG_TESTS' ] = { 'CheckForPKGConfig' : CheckForPKGConfig, 'CheckForPKG' : CheckForPKG, 'GetPKGFlags' : GetPKGFlags, 'GetPKGVariable' : GetPKGVariable }
 109
 110 def exists( env ):
 111         return 1
 112
 113