+
+ def ResolveReferences(self, var_dict, args):
+ """Resolve variable references in a string
+
+ This converts ${blah} within the string to the value of blah.
+ This function works recursively.
+
+ Args:
+ var_dict: Dictionary containing variables and their values
+ args: String containing make arguments
+ Returns:
+ Resolved string
+
+ >>> bsettings.Setup()
+ >>> tcs = Toolchains()
+ >>> tcs.Add('fred', False)
+ >>> var_dict = {'oblique' : 'OBLIQUE', 'first' : 'fi${second}rst', \
+ 'second' : '2nd'}
+ >>> tcs.ResolveReferences(var_dict, 'this=${oblique}_set')
+ 'this=OBLIQUE_set'
+ >>> tcs.ResolveReferences(var_dict, 'this=${oblique}_set${first}nd')
+ 'this=OBLIQUE_setfi2ndrstnd'
+ """
+ re_var = re.compile('(\$\{[-_a-z0-9A-Z]{1,}\})')
+
+ while True:
+ m = re_var.search(args)
+ if not m:
+ break
+ lookup = m.group(0)[2:-1]
+ value = var_dict.get(lookup, '')
+ args = args[:m.start(0)] + value + args[m.end(0):]
+ return args
+
+ def GetMakeArguments(self, board):
+ """Returns 'make' arguments for a given board
+
+ The flags are in a section called 'make-flags'. Flags are named
+ after the target they represent, for example snapper9260=TESTING=1
+ will pass TESTING=1 to make when building the snapper9260 board.
+
+ References to other boards can be added in the string also. For
+ example:
+
+ [make-flags]
+ at91-boards=ENABLE_AT91_TEST=1
+ snapper9260=${at91-boards} BUILD_TAG=442
+ snapper9g45=${at91-boards} BUILD_TAG=443
+
+ This will return 'ENABLE_AT91_TEST=1 BUILD_TAG=442' for snapper9260
+ and 'ENABLE_AT91_TEST=1 BUILD_TAG=443' for snapper9g45.
+
+ A special 'target' variable is set to the board target.
+
+ Args:
+ board: Board object for the board to check.
+ Returns:
+ 'make' flags for that board, or '' if none
+ """
+ self._make_flags['target'] = board.target
+ arg_str = self.ResolveReferences(self._make_flags,
+ self._make_flags.get(board.target, ''))
+ args = arg_str.split(' ')
+ i = 0
+ while i < len(args):
+ if not args[i]:
+ del args[i]
+ else:
+ i += 1
+ return args