src-tree cleanup: separate surfaces from libraries

libardourcp and now libardour_midisurface are not control
surfaces, but helper libraries for those.
They need to be deployed to the library folder (shared between
ctrl surfaces) and not scanned as ctrl surfaces at runtime.

libs/ctrl-interface/control_protocol/wscript

@@ -0,0 +1,40 @@
+#!/usr/bin/env python
+from waflib.extras import autowaf as autowaf
+import os
+
+# Mandatory variables
+top = '.'
+out = 'build'
+
+controlcp_sources = [
+    'basic_ui.cc',
+    'control_protocol.cc',
+    ]
+
+def options(opt):
+    autowaf.set_options(opt)
+
+def configure(conf):
+    pass
+
+def build(bld):
+    if bld.is_defined ('INTERNAL_SHARED_LIBS'):
+        obj              = bld.shlib(features = 'c cxx cshlib cxxshlib', source=controlcp_sources)
+        # defines for this library
+        obj.defines      = [ 'LIBCONTROLCP_DLL_EXPORTS' ]
+    else:
+        obj              = bld.stlib(features = 'c cxx cstlib cxxstlib', source=controlcp_sources)
+        obj.cxxflags     = [ bld.env['compiler_flags_dict']['pic'] ]
+        obj.defines      = [ ]
+
+    obj.export_includes = ['.', './control_protocol' ]
+    obj.defines    +=  [ 'PACKAGE="ardour_cp"' ]
+    obj.includes     = ['.', './control_protocol']
+    obj.name         = 'libardour_cp'
+    obj.target       = 'ardourcp'
+    obj.use          = 'libardour libpbd'
+    obj.uselib       = 'GLIBMM SIGCPP XML OSX'
+    obj.install_path = bld.env['LIBDIR']
+
+def shutdown():
+    autowaf.shutdown()