Add --sanetizer to run with gcc sanitation

SConstruct

@@ -66,6 +66,13 @@ AddOption('--stack-protection',
             help = 'Build with stack protection support'
 )
 
+AddOption('--sanitizer',
+            dest = 'sanitizer',
+            action='store_true',
+            default=False,
+            help = 'Build with gcc sanitizer'
+)
+
 AddOption('--32',
             dest='force32bit',
             action='store_true',
@@ -126,6 +133,10 @@ if GetOption('coverage'):
     env.Append(CFLAGS = ['--coverage'])
     env.Append(LINKFLAGS = ['--coverage'])
 
+if GetOption('sanitizer'):
+    env.Append(CFLAGS = ['-fsanitize=undefined', '-fsanitize=address'])
+    env.Append(LINKFLAGS = ['-fsanitize=undefined', '-fsanitize=address'])
+
 # Generate substitute dictionary
 subst_info = dict(('@' + key + '@', version_info[key]) for key in version_info)
 subst_info['@prefix@'] = prefix