diff --git a/.gitignore b/.gitignore
index 3829862e..5b2ff009 100644
--- a/.gitignore
+++ b/.gitignore
@@ -19,6 +19,7 @@
 .DS_Store
 test_results.csv
 _build*
+**/.venv/**
 
 # waf build files
 .lock-waf_*
diff --git a/Brewfile b/Brewfile
new file mode 100644
index 00000000..2fd6d0b8
--- /dev/null
+++ b/Brewfile
@@ -0,0 +1,7 @@
+tap 'homebrew/core'
+
+brew 'perl'
+brew 'cpanm'
+
+brew 'python@2'
+brew 'pipenv'
diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index e3d99159..ee2f416c 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -12,20 +12,26 @@ lib_xua Change Log
 
   * ADDED:     Initial library documentation
   * ADDED:     Application note AN00247: Using lib_xua with lib_spdif (transmit)
+  * ADDED:     Separate callbacks for input/output audio stream start/stop
   * CHANGE:    I2S hardware resources no longer used globally and must be passed
     to XUA_AudioHub()
   * CHANGE:    XUA_AudioHub() no longer pars S/PDIF transmitter task
   * CHANGE:    Moved to lib_spdif (from module_spdif_tx & module_spdif_rx)
   * CHANGE:    Define NUM_PDM_MICS renamed to XUA_NUM_PDM_MICS
   * CHANGE:    Define NO_USB renamed to XUA_USB_EN
+  * CHANGE:    Build files updated to support new "xcommon" behaviour in xwaf.
   * RESOLVED:  wChannelConfig in UAC1 descriptor set according to output channel
     count
   * RESOLVED:  Indexing of ADAT channel strings (#18059)
-  * RESOLVED:  Rebooting device fails when PLL config "not reset" bit is set 
+  * RESOLVED:  Rebooting device fails when PLL config "not reset" bit is set
 
   * Changes to dependencies:
 
-    - lib_spdif: Added dependency 3.0.0
+    - lib_dsp: Added dependency 5.0.0
+
+    - lib_mic_array: Added dependency 4.0.0
+
+    - lib_spdif: Added dependency 3.1.0
 
     - lib_xassert: Added dependency 3.0.1
 
@@ -101,7 +107,7 @@ Legacy release history
 
 7.3.0
 -----
-    - CHANGE:     Example OSX DFU host app updated to now take PID as runtime 
+    - CHANGE:     Example OSX DFU host app updated to now take PID as runtime
       argument. This enabled multiple XMOS devices to be attached to the host
       during DFU process
 
diff --git a/Jenkinsfile b/Jenkinsfile
index f2e9dbad..044d9bfe 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -1,61 +1,141 @@
-@Library('xmos_jenkins_shared_library@master') _
+@Library('xmos_jenkins_shared_library@develop') _
+
+getApproval()
+
 pipeline {
-  agent {
-    label 'x86&&macOS&&Apps'
-  }
+  agent none
   environment {
-    VIEW = 'xua'
     REPO = 'lib_xua'
+    VIEW = "${env.JOB_NAME.contains('PR-') ? REPO+'_'+env.CHANGE_TARGET : REPO+'_'+env.BRANCH_NAME}"
+  }
+  triggers {
+    /* Trigger this Pipeline on changes to the repos dependencies
+     *
+     * If this Pipeline is running in a pull request, the triggers are set
+     * on the base branch the PR is set to merge in to.
+     *
+     * Otherwise the triggers are set on the branch of a matching name to the
+     * one this Pipeline is on.
+     */
+    upstream(
+      upstreamProjects:
+        (env.JOB_NAME.contains('PR-') ?
+          "../lib_device_control/${env.CHANGE_TARGET}," +
+          "../lib_dsp/${env.CHANGE_TARGET}," +
+          "../lib_i2c/${env.CHANGE_TARGET}," +
+          "../lib_logging/${env.CHANGE_TARGET}," +
+          "../lib_mic_array/${env.CHANGE_TARGET}," +
+          "../lib_spdif/${env.CHANGE_TARGET}," +
+          "../lib_xassert/${env.CHANGE_TARGET}," +
+          "../lib_xud/${env.CHANGE_TARGET}," +
+          "../tools_released/${env.CHANGE_TARGET}," +
+          "../tools_xmostest/${env.CHANGE_TARGET}," +
+          "../xdoc_released/${env.CHANGE_TARGET}"
+        :
+          "../lib_device_control/${env.BRANCH_NAME}," +
+          "../lib_dsp/${env.BRANCH_NAME}," +
+          "../lib_i2c/${env.BRANCH_NAME}," +
+          "../lib_logging/${env.BRANCH_NAME}," +
+          "../lib_mic_array/${env.BRANCH_NAME}," +
+          "../lib_spdif/${env.BRANCH_NAME}," +
+          "../lib_xassert/${env.BRANCH_NAME}," +
+          "../lib_xud/${env.BRANCH_NAME}," +
+          "../tools_released/${env.BRANCH_NAME}," +
+          "../tools_xmostest/${env.BRANCH_NAME}," +
+          "../xdoc_released/${env.BRANCH_NAME}"),
+      threshold: hudson.model.Result.SUCCESS
+    )
   }
   options {
     skipDefaultCheckout()
   }
   stages {
-    stage('Get view') {
-      steps {
-        prepareAppsSandbox("${VIEW}", "${REPO}")
+    stage('Basic tests') {
+      agent {
+        label 'x86_64&&brew'
       }
-    }
-    stage('Library checks') {
-      steps {
-        xcoreLibraryChecks("${REPO}")
-      }
-    }
-    stage('Tests') {
-      steps {
-        runXmostest("${REPO}", 'tests')
-      }
-    }
-    stage('Host builds') {
-      steps {
-        dir("${REPO}") {
-          dir("${REPO}") {
-            dir('host') {
-              dir('xmosdfu') {
-                sh 'make -f Makefile.OSX64'
+      stages {
+        stage('Get view') {
+          steps {
+            xcorePrepareSandbox("${VIEW}", "${REPO}")
+          }
+        }
+        stage('Library checks') {
+          steps {
+            xcoreLibraryChecks("${REPO}")
+          }
+        }
+        stage('Tests') {
+          steps {
+            runXmostest("${REPO}", 'tests')
+          }
+        }
+        stage('xCORE builds') {
+          steps {
+            dir("${REPO}") {
+              xcoreAllAppNotesBuild('examples')
+              dir("${REPO}") {
+                runXdoc('doc')
               }
             }
           }
         }
       }
+      post {
+        cleanup {
+          xcoreCleanSandbox()
+        }
+      }
     }
-    stage('xCORE builds') {
-      steps {
-        dir("${REPO}") {
-          xcoreAllAppNotesBuild('examples')
-          dir("${REPO}") {
-            runXdoc('doc')
+    stage('Build host apps') {
+      failFast true
+      parallel {
+        stage('Build Linux host app') {
+          agent {
+            label 'x86_64&&brew&&linux'
+          }
+          steps {
+            xcorePrepareSandbox("${VIEW}", "${REPO}")
+            dir("${REPO}/${REPO}/host/xmosdfu") {
+              sh 'make -f Makefile.Linux64'
+            }
+          }
+          post {
+            cleanup {
+              xcoreCleanSandbox()
+            }
+          }
+        }
+        stage('Build Mac host app') {
+          agent {
+            label 'x86_64&&brew&&macOS'
+          }
+          steps {
+            xcorePrepareSandbox("${VIEW}", "${REPO}")
+            dir("${REPO}/${REPO}/host/xmosdfu") {
+              sh 'make -f Makefile.OSX64'
+            }
+          }
+          post {
+            cleanup {
+              xcoreCleanSandbox()
+            }
           }
         }
       }
     }
-  }
-  post {
-    success {
-      updateViewfiles()
-    }
-    cleanup {
-      cleanWs()
+    stage('Update') {
+      agent {
+        label 'x86_64&&brew'
+      }
+      steps {
+        updateViewfiles()
+      }
+      post {
+        cleanup {
+          xcoreCleanSandbox()
+        }
+      }
     }
   }
 }
diff --git a/Pipfile b/Pipfile
new file mode 100644
index 00000000..6d52bfd2
--- /dev/null
+++ b/Pipfile
@@ -0,0 +1,7 @@
+[[source]]
+name = "pypi"
+url = "https://pypi.org/simple"
+verify_ssl = true
+
+[dev-packages]
+flake8 = "*"
diff --git a/cpanfile b/cpanfile
new file mode 100644
index 00000000..071f5e6a
--- /dev/null
+++ b/cpanfile
@@ -0,0 +1,2 @@
+requires 'File::Copy::Recursive';
+requires 'LWP::Simple'
diff --git a/lib_xua/module_build_info b/lib_xua/module_build_info
index be92c565..45eed276 100644
--- a/lib_xua/module_build_info
+++ b/lib_xua/module_build_info
@@ -1,37 +1,67 @@
-# You can set flags specifically for your module by using the MODULE_XCC_FLAGS
-# variable. So the following
-#
-#   MODULE_XCC_FLAGS = $(XCC_FLAGS) -O3
-#
-# specifies that everything in the modules should have the application
-# build flags with -O3 appended (so the files will build at
-# optimization level -O3).
-#
-# You can also set MODULE_XCC_C_FLAGS, MODULE_XCC_XC_FLAGS etc..
+VERSION = 0.2.0
 
-MODULE_XCC_FLAGS = $(XCC_FLAGS) -O3 -DREF_CLK_FREQ=100 -fasm-linenum -fcomment-asm
+DEPENDENT_MODULES = lib_logging(>=3.0.0) \
+                    lib_xassert(>=4.0.0) \
+                    lib_xud(>=0.2.0) \
+                    lib_spdif(>=4.0.0) \
+                    lib_mic_array(>=4.0.0)
+
+MODULE_XCC_FLAGS = $(XCC_FLAGS) \
+                   -O3 \
+                   -DREF_CLK_FREQ=100 \
+                   -fasm-linenum \
+                   -fcomment-asm
+
+# Core
+XCC_FLAGS_xua_endpoint0.c = $(MODULE_XCC_FLAGS) -Os -mno-dual-issue
+XCC_FLAGS_xua_ep0_uacreqs.xc = $(MODULE_XCC_FLAGS) -Os -mno-dual-issue
+XCC_FLAGS_dbcalc.xc = $(MODULE_XCC_FLAGS) -Os -mno-dual-issue
+XCC_FLAGS_audioports.c = $(MODULE_XCC_FLAGS) -Os -mno-dual-issue
+XCC_FLAGS_audioports.xc = $(MODULE_XCC_FLAGS) -Os -mno-dual-issue
+
+# DFU
+XCC_FLAGS_dfu.xc = $(MODULE_XCC_FLAGS) -Os -mno-dual-issue
+XCC_FLAGS_flash_interface.c = $(MODULE_XCC_FLAGS) -Os -mno-dual-issue
+XCC_FLAGS_flashlib_user.c = $(MODULE_XCC_FLAGS) -Os -mno-dual-issue
 
 OPTIONAL_HEADERS += xua_conf.h
 
-VERSION = 0.2.0
+EXPORT_INCLUDE_DIRS = api \
+                      src/core \
+                      src/core/audiohub \
+                      src/core/buffer/ep \
+                      src/core/endpoint0 \
+                      src/dfu
 
-DEPENDENT_MODULES = lib_logging(>=2.1.0) lib_xassert(>=2.0.0) lib_xud(>=0.1.0) lib_spdif(>=3.0.0)
+INCLUDE_DIRS = $(EXPORT_INCLUDE_DIRS) \
+               src/core/buffer/decouple \
+               src/core/clocking \
+               src/core/mixer \
+               src/core/pdm_mics \
+               src/core/ports \
+               src/core/support \
+               src/core/support/powersave \
+               src/core/user \
+               src/core/user/audiostream \
+               src/core/user/hid \
+               src/core/user/hostactive \
+               src/midi
 
-INCLUDE_DIRS = api src/* src/core/* src/core/user/hid
+SOURCE_DIRS = src/core \
+              src/core/audiohub \
+              src/core/buffer/decouple \
+              src/core/buffer/ep \
+              src/core/clocking \
+              src/core/endpoint0 \
+              src/core/mixer \
+              src/core/pdm_mics \
+              src/core/ports \
+              src/core/support \
+              src/core/support/powersave \
+              src/core/user/audiostream \
+              src/core/user/hostactive \
+              src/core/xuduser \
+              src/dfu \
+              src/midi
 
-#ignore host dir
-SOURCE_DIRS = src/*
-
-# The following file specific flags are not automatically kept in sync with the wscript file
-# Core
 EXCLUDE_FILES += descriptors_2.rst
-XCC_FLAGS_xua_endpoint0.c = -Os -mno-dual-issue $(XCC_FLAGS)
-XCC_FLAGS_xua_ep0_uacreqs.xc = -Os -mno-dual-issue $(XCC_FLAGS)
-XCC_FLAGS_dbcalc.xc = -Os -mno-dual-issue $(XCC_FLAGS)
-XCC_FLAGS_audioports.c = -Os -mno-dual-issue $(XCC_FLAGS)
-XCC_FLAGS_audioports.xc = -Os -mno-dual-issue $(XCC_FLAGS)
-
-# DFU
-XCC_FLAGS_dfu.xc = -Os -mno-dual-issue $(XCC_FLAGS)
-XCC_FLAGS_flash_interface.c = -Os -mno-dual-issue $(XCC_FLAGS)
-XCC_FLAGS_flashlib_user.c = -Os -mno-dual-issue $(XCC_FLAGS)
diff --git a/lib_xua/src/core/endpoint0/xua_endpoint0.c b/lib_xua/src/core/endpoint0/xua_endpoint0.c
index 7b42909b..0f7f766f 100755
--- a/lib_xua/src/core/endpoint0/xua_endpoint0.c
+++ b/lib_xua/src/core/endpoint0/xua_endpoint0.c
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018, XMOS Ltd, All rights reserved
+// Copyright (c) 2011-2019, XMOS Ltd, All rights reserved
 /**
  * @brief   Implements endpoint zero for an USB Audio 1.0/2.0 device
  * @author  Ross Owen, XMOS Semiconductor
@@ -439,18 +439,50 @@ void XUA_Endpoint0_loop(XUD_Result_t result, USB_SetupPacket_t sp, chanend c_ep0
                     }
 
 #if (NUM_USB_CHAN_OUT > 0) && (NUM_USB_CHAN_IN > 0)
-                    if ((sp.wIndex == INTERFACE_NUMBER_AUDIO_OUTPUT) || (sp.wIndex == INTERFACE_NUMBER_AUDIO_INPUT))
                     {
-                        /* Check for stream start stop on output and input audio interfaces */
-                        if(sp.wValue && !g_interfaceAlt[INTERFACE_NUMBER_AUDIO_OUTPUT] && !g_interfaceAlt[INTERFACE_NUMBER_AUDIO_INPUT])
+                        unsigned num_input_interfaces = g_interfaceAlt[INTERFACE_NUMBER_AUDIO_INPUT];
+                        unsigned num_output_interfaces = g_interfaceAlt[INTERFACE_NUMBER_AUDIO_OUTPUT];
+                        if (sp.wIndex == INTERFACE_NUMBER_AUDIO_INPUT)
                         {
-                            /* If start and input AND output not currently running */
-                            UserAudioStreamStart();
+                            // in: 0 -> 1
+                            if (sp.wValue && !num_input_interfaces)
+                            {
+                                UserAudioInputStreamStart();
+                                if (!num_output_interfaces)
+                                {
+                                    UserAudioStreamStart();
+                                }
+                            }
+                            // in: 1 -> 0
+                            else if (!sp.wValue && num_input_interfaces)
+                            {
+                                UserAudioInputStreamStop();
+                                if (!num_output_interfaces)
+                                {
+                                    UserAudioStreamStop();
+                                }
+                            }
                         }
-                        else if(((sp.wIndex == 1) && (!sp.wValue)) && g_interfaceAlt[INTERFACE_NUMBER_AUDIO_OUTPUT] && (!g_interfaceAlt[INTERFACE_NUMBER_AUDIO_INPUT]))
+                        else if (sp.wIndex == INTERFACE_NUMBER_AUDIO_OUTPUT)
                         {
-                            /* if output stop and output running and input not running */
-                            UserAudioStreamStop();
+                            // out: 0 -> 1
+                            if (sp.wValue && !num_output_interfaces)
+                            {
+                                UserAudioOutputStreamStart();
+                                if (!num_input_interfaces)
+                                {
+                                    UserAudioStreamStart();
+                                }
+                            }
+                            // out: 1 -> 0
+                            else if (!sp.wValue && num_output_interfaces)
+                            {
+                                UserAudioOutputStreamStop();
+                                if (!num_input_interfaces)
+                                {
+                                    UserAudioStreamStop();
+                                }
+                            }
                         }
                         else if(((sp.wIndex == 2) && (!sp.wValue)) && g_interfaceAlt[INTERFACE_NUMBER_AUDIO_INPUT] && (!g_interfaceAlt[INTERFACE_NUMBER_AUDIO_OUTPUT]))
                         {
@@ -465,11 +497,13 @@ void XUA_Endpoint0_loop(XUD_Result_t result, USB_SetupPacket_t sp, chanend c_ep0
                         {
                             /* if start and not currently running */
                             UserAudioStreamStart();
+                            UserAudioOutputStreamStart();
                         }
                         else if (!sp.wValue && g_interfaceAlt[INTERFACE_NUMBER_AUDIO_OUTPUT])
                         {
                             /* if stop and currently running */
                             UserAudioStreamStop();
+                            UserAudioOutputStreamStop();
                         }
                     }
 #elif (NUM_USB_CHAN_IN > 0)
@@ -479,11 +513,13 @@ void XUA_Endpoint0_loop(XUD_Result_t result, USB_SetupPacket_t sp, chanend c_ep0
                         {
                             /* if start and not currently running */
                             UserAudioStreamStart();
+                            UserAudioInputStreamStart();
                         }
                         else if (!sp.wValue && g_interfaceAlt[INTERFACE_NUMBER_AUDIO_INPUT])
                         {
                             /* if stop and currently running */
                             UserAudioStreamStop();
+                            UserAudioInputStreamStop();
                         }
                     }
 #endif
diff --git a/lib_xua/src/core/endpoint0/xua_ep0_descriptors.h b/lib_xua/src/core/endpoint0/xua_ep0_descriptors.h
index 066319f4..548b253a 100644
--- a/lib_xua/src/core/endpoint0/xua_ep0_descriptors.h
+++ b/lib_xua/src/core/endpoint0/xua_ep0_descriptors.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018, XMOS Ltd, All rights reserved
+// Copyright (c) 2011-2019, XMOS Ltd, All rights reserved
 /**
  * @file    xua_ep0_descriptors.h
  * @brief   Device Descriptors
@@ -423,7 +423,22 @@ USB_Descriptor_Device_t devDesc_Audio1 =
 #endif
 
 #if (AUDIO_CLASS == 2)
-/* Device Descriptor for Audio Class 2.0 (Assumes High-Speed ) */
+/* Device Descriptor for Audio Class 2.0 (Assumes High-Speed )
+ *
+ * The use of two configurations dates back to Windows XP (could be SP2). This
+ * lacked some standards support and incorrectly parsed the full audio class 2.0
+ * descriptor with its IADs (Interface Association Descriptors). The observed
+ * behaviour included loading the built-in audio class 1.0 driver on some
+ * interfaces (possibly the wrong ones, too), and hanging.
+ *
+ * Presenting a blank configuration first prevented loading the composite driver
+ * and issues arising from it, while still allowing to load a vendor driver on
+ * the actual configuration.
+ *
+ * Recent Windows subsystem can parse our class 2.0 descriptor correctly
+ * (certainly Windows 7 and onwards). It may be possible to remove this
+ * workaround.
+ */
 USB_Descriptor_Device_t devDesc_Audio2 =
 {
     .bLength                        = sizeof(USB_Descriptor_Device_t),
diff --git a/lib_xua/src/core/pdm_mics/pdm_mic.xc b/lib_xua/src/core/pdm_mics/pdm_mic.xc
index dabfb794..b853f2d0 100644
--- a/lib_xua/src/core/pdm_mics/pdm_mic.xc
+++ b/lib_xua/src/core/pdm_mics/pdm_mic.xc
@@ -1,4 +1,4 @@
-// Copyright (c) 2015-2018, XMOS Ltd, All rights reserved
+// Copyright (c) 2015-2019, XMOS Ltd, All rights reserved
 
 #include "xua.h"
 
@@ -107,6 +107,7 @@ void XUA_PdmBuffer(streaming chanend c_ds_output[2], chanend c_audio)
         dc[0].mic_gain_compensation[2]=0;
         dc[0].mic_gain_compensation[3]=0;
         dc[0].channel_count = 4;
+        dc[0].async_interface_enabled = 0;
         dc[1].dcc = &dcc;
         dc[1].data = mic_decimator_fir_data[4];
         dc[1].mic_gain_compensation[0]=0;
@@ -114,6 +115,7 @@ void XUA_PdmBuffer(streaming chanend c_ds_output[2], chanend c_audio)
         dc[1].mic_gain_compensation[2]=0;
         dc[1].mic_gain_compensation[3]=0;
         dc[1].channel_count = 4;
+        dc[0].async_interface_enabled = 0;
 
         mic_array_decimator_configure(c_ds_output, decimatorCount, dc);
 
diff --git a/lib_xua/src/core/user/audiostream/audiostream.c b/lib_xua/src/core/user/audiostream/audiostream.c
index d07491df..863bb1a0 100644
--- a/lib_xua/src/core/user/audiostream/audiostream.c
+++ b/lib_xua/src/core/user/audiostream/audiostream.c
@@ -1,6 +1,9 @@
-// Copyright (c) 2013-2018, XMOS Ltd, All rights reserved
+// Copyright (c) 2013-2019, XMOS Ltd, All rights reserved
+
+/* Default implementations of AudioStreamStop() and AudioStreamStart()
+ * callbacks.
+ */
 
-/* Deafult implementations of AudioStreamStop() and AudioStreamStart().  Both can be over-ridden */
 void UserAudioStreamStop() __attribute__ ((weak));
 void UserAudioStreamStop()
 {
@@ -12,3 +15,27 @@ void UserAudioStreamStart()
 {
     return;
 }
+
+void UserAudioInputStreamStop() __attribute__ ((weak));
+void UserAudioInputStreamStop()
+{
+    return;
+}
+
+void UserAudioInputStreamStart() __attribute__ ((weak));
+void UserAudioInputStreamStart()
+{
+    return;
+}
+
+void UserAudioOutputStreamStop() __attribute__ ((weak));
+void UserAudioOutputStreamStop()
+{
+    return;
+}
+
+void UserAudioOutputStreamStart() __attribute__ ((weak));
+void UserAudioOutputStreamStart()
+{
+    return;
+}
diff --git a/lib_xua/src/core/user/audiostream/audiostream.h b/lib_xua/src/core/user/audiostream/audiostream.h
index 60942914..bb218fd5 100644
--- a/lib_xua/src/core/user/audiostream/audiostream.h
+++ b/lib_xua/src/core/user/audiostream/audiostream.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011-2018, XMOS Ltd, All rights reserved
+// Copyright (c) 2011-2019, XMOS Ltd, All rights reserved
 #ifndef _AUDIOSTREAM_H_
 #define _AUDIOSTREAM_H_
 
@@ -14,5 +14,17 @@ void UserAudioStreamStart(void);
 /* Any actions required on stream stop e.g. DAC mute - run every steam stop  */
 void UserAudioStreamStop(void);
 
+/* Any actions required on input stream start */
+void UserAudioInputStreamStart(void);
+
+/* Any actions required on input stream stop */
+void UserAudioInputStreamStop(void);
+
+/* Any actions required on output stream start */
+void UserAudioOutputStreamStart(void);
+
+/* Any actions required on output stream stop */
+void UserAudioOutputStreamStop(void);
+
 #endif
 
diff --git a/lib_xua/wscript b/lib_xua/wscript
deleted file mode 100644
index 76f039b3..00000000
--- a/lib_xua/wscript
+++ /dev/null
@@ -1,109 +0,0 @@
-import os.path
-
-
-def create_list_from_make_flag(bld, list_of_flags):
-    for i, flag in enumerate(list_of_flags):
-        if flag.startswith('$('):
-            for f in bld.env[flag.strip('$()')]:
-                list_of_flags.insert(i, f)
-                i += 1
-            list_of_flags.remove(flag)
-    return list_of_flags
-
-
-def create_list_of_strings(whitespace_seperated_list):
-    list_of_strings = whitespace_seperated_list.split(' ')
-    for item in list_of_strings:
-        item = "'{}'".format(item)
-    return list_of_strings
-
-
-def read_module_build_info(bld):
-    with open(os.path.join(bld.path.abspath(), 'module_build_info')) as file:
-        module_build_info = {}
-        for line in file.readlines():
-            line = line.strip()
-            if line and not line.startswith('#'):
-                key, value = line.split('=', 1)
-                module_build_info[key.strip(' +')] = value.strip()
-
-        try:
-            module_build_info['OPTIONAL_HEADERS'] = (
-                create_list_of_strings(module_build_info['OPTIONAL_HEADERS']))
-        except KeyError:
-            pass
-
-        try:
-            module_build_info['DEPENDENT_MODULES'] = (
-                create_list_of_strings(module_build_info['DEPENDENT_MODULES']))
-        except KeyError:
-            pass
-
-        try:
-            module_build_info['MODULE_XCC_FLAGS'] = (
-                create_list_from_make_flag(bld,
-                    create_list_of_strings(module_build_info['MODULE_XCC_FLAGS'])))
-        except KeyError:
-            pass
-
-        try:
-            module_build_info['MODULE_XCC_XC_FLAGS'] = (
-                create_list_from_make_flag(bld,
-                    create_list_of_strings(module_build_info['MODULE_XCC_XC_FLAGS'])))
-        except KeyError:
-            pass
-
-        try:
-            module_build_info['MODULE_XCC_C_FLAGS'] = (
-                create_list_from_make_flag(bld,
-                    create_list_of_strings(module_build_info['MODULE_XCC_C_FLAGS'])))
-        except KeyError:
-            pass
-
-        try:
-            module_build_info['MODULE_XCC_CPP_FLAGS'] = (
-                create_list_from_make_flag(bld,
-                    create_list_of_strings(module_build_info['MODULE_XCC_CPP_FLAGS'])))
-        except KeyError:
-            pass
-
-        try:
-            module_build_info['MODULE_XCC_ASM_FLAGS'] = (
-                create_list_from_make_flag(bld,
-                    create_list_of_strings(module_build_info['MODULE_XCC_ASM_FLAGS'])))
-        except KeyError:
-            pass
-
-        try:
-            module_build_info['INCLUDE_DIRS'] = (
-                create_list_of_strings(module_build_info['INCLUDE_DIRS']))
-        except KeyError:
-            pass
-
-        return module_build_info
-
-
-def use_module(bld):
-    module_build_info = read_module_build_info(bld)
-    source = bld.path.ant_glob(['src/**/*.xc', 'src/**/*.c', 'src/**/*.S'],
-                               excl=['**/descriptors_2.rst'])
-    bld.env.MODULE_XCC_FLAGS = module_build_info['MODULE_XCC_FLAGS']
-
-    # The following file specific flags are not automatically kept in sync with the module_build_info file
-    # Core
-    bld.env['XCC_FLAGS_endpoint0.c'] = bld.env.XCC_FLAGS + ['-Os', '-mno-dual-issue']
-    bld.env['XCC_FLAGS_xua_ep0_uacreqs.xc'] = bld.env.XCC_FLAGS + ['-Os', '-mno-dual-issue']
-    bld.env['XCC_FLAGS_dbcalc.xc'] = bld.env.XCC_FLAGS + ['-Os', '-mno-dual-issue']
-    bld.env['XCC_FLAGS_audioports.c'] = bld.env.XCC_FLAGS + ['-Os', '-mno-dual-issue']
-    bld.env['XCC_FLAGS_audioports.xc'] = bld.env.XCC_FLAGS + ['-Os', '-mno-dual-issue']
-    # DFU
-    bld.env['XCC_FLAGS_dfu.xc'] = bld.env.XCC_FLAGS + ['-Os', '-mno-dual-issue']
-    bld.env['XCC_FLAGS_flash_interface.c'] = bld.env.XCC_FLAGS + ['-Os', '-mno-dual-issue']
-    bld.env['XCC_FLAGS_flashlib_user.c'] = bld.env.XCC_FLAGS + ['-Os', '-mno-dual-issue']
-
-    bld.module(
-        source=source,
-        depends_on=module_build_info['DEPENDENT_MODULES'],
-        includes=module_build_info['INCLUDE_DIRS'],
-        optional_headers=module_build_info['OPTIONAL_HEADERS'],
-        version=module_build_info['VERSION'])
\ No newline at end of file