root/branches/libffado-2.0/admin/pkgconfig.py

#!/usr/bin/python
#
# Copyright (C) 2007-2008 Arnold Krille
#
# This file is part of FFADO
# FFADO = Free Firewire (pro-)audio drivers for linux
#
# FFADO is based upon FreeBoB.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 2 of the License, or
# (at your option) version 3 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#

#
# Taken from http://www.scons.org/wiki/UsingPkgConfig
# and heavily modified
#

#
# Checks for pkg-config
#
def CheckForPKGConfig( context, version='0.0.0' ):
        context.Message( "Checking for pkg-config (at least version %s)... " % version )
        ret = context.TryAction( "pkg-config --atleast-pkgconfig-version=%s" %version )[0]
        context.Result( ret )
        return ret

#
# Checks for the given package with an optional version-requirement
#
# The flags (which can be imported into the environment by env.MergeFlags(...)
# are exported as env['NAME_FLAGS'] where name is built by removing all +,-,.
# and upper-casing.
#
def CheckForPKG( context, name, version="" ):
        name2 = name.replace("+","").replace(".","").replace("-","")

        if version == "":
                context.Message( "Checking for %s... \t" % name )
                ret = context.TryAction( "pkg-config --exists '%s'" % name )[0]
        else:
                context.Message( "Checking for %s (%s or higher)... \t" % (name,version) )
                ret = context.TryAction( "pkg-config --atleast-version=%s '%s'" % (version,name) )[0]

        if ret:
                context.env['%s_FLAGS' % name2.upper()] = context.env.ParseFlags("!pkg-config --cflags --libs %s" % name)

        context.Result( ret )
        return ret

#
# Checks for the existance of the package and returns the packages flags.
#
# This should allow caching of the flags so that pkg-config is called only once.
#
def GetPKGFlags( context, name, version="" ):
        import os

        if version == "":
                context.Message( "Checking for %s... \t" % name )
                ret = context.TryAction( "pkg-config --exists '%s'" % name )[0]
        else:
                context.Message( "Checking for %s (%s or higher)... \t" % (name,version) )
                ret = context.TryAction( "pkg-config --atleast-version=%s '%s'" % (version,name) )[0]

        if not ret:
                context.Result( ret )
                return ret

        out = os.popen2( "pkg-config --cflags --libs %s" % name )[1]
        ret = out.read()

        context.Result( True )
        return ret

def generate( env, **kw ):
        env['PKGCONFIG_TESTS' ] = { 'CheckForPKGConfig' : CheckForPKGConfig, 'CheckForPKG' : CheckForPKG, 'GetPKGFlags' : GetPKGFlags }

def exists( env ):
        return 1