Fix a few details

tools/as.py

@@ -6,7 +6,7 @@ import sys
 
 import obj_pb2
 
-GRAMMAR_FILE = '/home/paulmathieu/vhdl/bin/as.ebnf'
+GRAMMAR_FILE = '/home/paulmathieu/vhdl/tools/as.ebnf'
 
 opcodes = {
         'nop'  : lambda: '0000',

tools/cc.py

@@ -11,7 +11,7 @@ import lark
 
 asmod = importlib.import_module("as")
 
-GRAMMAR_FILE = '/home/paulmathieu/vhdl/bin/cc.ebnf'
+GRAMMAR_FILE = '/home/paulmathieu/vhdl/tools/cc.ebnf'
 CPP = ('cpp', '-P')
 
 
@@ -1002,7 +1002,6 @@ def larkparse(f, debug=False):
 
 def parse_args():
     parser = argparse.ArgumentParser(description='Compile.')
-    group = parser.add_mutually_exclusive_group()
     parser.add_argument('--debug', action='store_true',
                         help='print the AST')
     parser.add_argument('--assembly', '-S', action='store_true',

tools/ld.py

@@ -4,7 +4,7 @@ import sys
 
 import obj_pb2
 
-CRT0_FILE = '/home/paulmathieu/vhdl/bin/crt0.o'
+CRT0_FILE = '/home/paulmathieu/vhdl/tools/crt0.o'
 
 
 def parse_objs(objs):