Use WafToolchainFlags from git submodule

.gitmodules

@@ -7,3 +7,6 @@
 [submodule "siginfo"]
 	path = siginfo
 	url = ../siginfo
+[submodule "waftoolchainflags"]
+	path = waftoolchainflags
+	url = ../waf-toolchain-flags

waftoolchainflags

@@ -0,0 +1 @@
+Subproject commit c71e02562fdd089c930412166412b5473f19e1da

wscript

@@ -27,6 +27,7 @@ import sys
 from waflib import Logs, Options, TaskGen
 from waflib import Context
 from waflib.Build import BuildContext, CleanContext, InstallContext, UninstallContext
+from waftoolchainflags import WafToolchainFlags
 
 VERSION = "2.22.1"
 APPNAME = 'jackdbus'
@@ -110,86 +111,6 @@ def detect_platform(conf):
                 conf.end_msg(name, color='CYAN')
                 break
 
-class WafToolchainFlags:
-    """
-    Waf helper class for handling set of CFLAGS
-    and related. The flush() method will
-    prepend so to allow supplied by (downstream/distro/builder) waf caller flags
-    to override the upstream flags in wscript.
-    TODO: upstream this or find alternative easy way of doing the same
-    """
-    def __init__(self, conf):
-        """
-        :param conf: Waf configuration object
-        """
-        self.conf = conf
-        self.flags = {}
-        for x in ('CPPFLAGS', 'CFLAGS', 'CXXFLAGS', 'LINKFLAGS'):
-            self.flags[x] = []
-
-    def flush(self):
-        """
-        Flush flags to the configuration object
-        Prepend is used so to allow supplied by
-        (downstream/distro/builder) waf caller flags
-        to override the upstream flags in wscript.
-        """
-        for key, val in self.flags.items():
-            self.conf.env.prepend_value(key, val)
-
-    def add(self, key, val):
-        """
-        :param key: Set to add flags to. 'CPPFLAGS', 'CFLAGS', 'CXXFLAGS' or 'LINKFLAGS'
-        :param val: string or list of strings
-        """
-        flags = self.flags[key]
-        if isinstance(val, list):
-	    #flags.extend(val)
-            for x in val:
-                if not isinstance(x, str):
-                    raise Exception("value must be string or list of strings. ", type(x))
-                flags.append(x)
-        elif isinstance(val, str):
-            flags.append(val)
-        else:
-            raise Exception("value must be string or list of strings")
-
-    def add_cpp(self, value):
-        """
-        Add flag or list of flags to CPPFLAGS
-        :param value: string or list of strings
-        """
-        self.add('CPPFLAGS', value)
-
-    def add_c(self, value):
-        """
-        Add flag or list of flags to CFLAGS
-        :param value: string or list of strings
-        """
-        self.add('CFLAGS', value)
-
-    def add_cxx(self, value):
-        """
-        Add flag or list of flags to CXXFLAGS
-        :param value: string or list of strings
-        """
-        self.add('CXXFLAGS', value)
-
-    def add_candcxx(self, value):
-        """
-        Add flag or list of flags to CFLAGS and CXXFLAGS
-        :param value: string or list of strings
-        """
-        self.add_c(value)
-        self.add_cxx(value)
-
-    def add_link(self, value):
-        """
-        Add flag or list of flags to LINKFLAGS
-        :param value: string or list of strings
-        """
-        self.add('LINKFLAGS', value)
-
 def configure(conf):
     conf.load('compiler_cxx')
     conf.load('compiler_c')