wscript: don't add pointless -DHAVE_X for each mandatory subdir

The sub_config_and_use function recursed, but it also invoked
autowaf.set_local_lib , which however didn't do anything useful. The
HAVE_ defines are not used anywhere, and the AUTOWAF_LOCAL defines are
only used in autowaf.use_lib, which however isn't used anywhere.

Dropping these defines simplify the build environment and makes the
compiler command line half as long and thus makes debugging much more
manageable.

libs/backends/wscript

@@ -4,16 +4,12 @@ from waflib.extras import autowaf as autowaf
 def options(opt):
     pass
 
-def sub_config_and_use(conf, name, has_objects = True):
-    conf.recurse(name)
-    autowaf.set_local_lib(conf, name, has_objects)
-
 def configure(conf):
     autowaf.set_recursive()
 
     backends = conf.env['BACKENDS']
     for i in backends:
-        sub_config_and_use(conf, i)
+        conf.recurse(i)
 
 def build(bld):
     backends = bld.env['BACKENDS']

libs/panners/wscript

@@ -4,17 +4,13 @@ from waflib.extras import autowaf as autowaf
 def options(opt):
     pass
 
-def sub_config_and_use(conf, name, has_objects = True):
-    conf.recurse(name)
-    autowaf.set_local_lib(conf, name, has_objects)
-
 def configure(conf):
     autowaf.set_recursive()
 
     panners = [ '2in2out', '1in2out', 'vbap', 'stereobalance' ]
 
     for i in panners:
-        sub_config_and_use(conf, i)
+        conf.recurse(i)
 
 def build(bld):
     panners = [ '2in2out', '1in2out', 'vbap', 'stereobalance' ]

libs/surfaces/wscript

@@ -27,10 +27,6 @@ children = [
 def options(opt):
     pass
 
-def sub_config_and_use(conf, name, has_objects = True):
-    conf.recurse(name)
-    autowaf.set_local_lib(conf, name, has_objects)
-
 def configure(conf):
     global children
 
@@ -70,7 +66,7 @@ def configure(conf):
         children += [ 'websockets' ]
 
     for i in children:
-        sub_config_and_use(conf, i)
+        conf.recurse(i)
 
 def build(bld):
     bld.recurse('generic_midi')

wscript

@@ -1481,7 +1481,7 @@ int main () { __int128 x = 0; return 0; }
         conf.env.append_value('LIB', 'm')
 
     for i in children:
-        sub_config_and_use(conf, i)
+        conf.recurse(i)
 
     # Fix utterly braindead FLAC include path to not smash assert.h
     conf.env['INCLUDES_FLAC'] = []