scons: add slicc and ply to sys.path and PYTHONPATH so everyone has access

src/arch/isa_parser.py

@@ -34,11 +34,6 @@ import traceback
 # get type names
 from types import *
 
-# Prepend the directory where the PLY lex & yacc modules are found
-# to the search path.  Assumes we're compiling in a subdirectory
-# of 'build' in the current tree.
-sys.path[0:0] = [os.environ['M5_PLY']]
-
 from ply import lex
 from ply import yacc
 

src/arch/micro_asm.py

@@ -34,10 +34,6 @@ import traceback
 # get type names
 from types import *
 
-# Prepend the directory where the PLY lex & yacc modules are found
-# to the search path.
-sys.path[0:0] = [os.environ['M5_PLY']]
-
 from ply import lex
 from ply import yacc
 

src/mem/protocol/SConscript

@@ -73,7 +73,6 @@ protocol = env['PROTOCOL']
 sources = [ protocol_dir.File("RubySlicc_interfaces.slicc"),
             protocol_dir.File("%s.slicc" % protocol) ]
 
-sys.path[0:0] = [env['ENV']['M5_PLY']]
 execfile(slicc_dir.File('parser/parser.py').srcnode().abspath)
 
 sm_files = read_slicc([s.srcnode().abspath for s in sources])