Add -D options to iar assembler on export

Author: theotherjimmy

tools/export/iar.py

@@ -78,6 +78,8 @@ def generate(self, progen_build=False):
         project_data['tool_specific']['iar']['misc'].update(self.progen_flags)
         project_data['tool_specific']['iar']['misc']['asm_flags'].remove(
             self.toolchain.get_config_option(self.config_header)[0])
+        project_data['tool_specific']['iar']['misc']['asm_flags'].extend(
+            ['-D%s' % d for d in self.toolchain.get_symbols()])
         # VLA is enabled via template IccAllowVLA
         project_data['tool_specific']['iar']['misc']['c_flags'].remove("--vla")
         project_data['common']['build_dir'] = os.path.join(project_data['common']['build_dir'], 'iar_arm')