Add --coverage option to SConstruct file to build with gcov coverage

support

SConstruct

@@ -36,6 +36,12 @@ AddOption('--test_xml',
             help='Create a result.xml when running the testsuite'
 )
 
+AddOption('--coverage',
+            dest='coverage',
+            action='store_true',
+            help='Build with coverage (gcov) support'
+)
+
 AddOption('--stack-protection',
             dest = 'stack_protection',
             action='store_true',
@@ -85,6 +91,9 @@ if GetOption('stack_protection'):
     env.Append(CFLAGS = ['-fstack-protector', '--param=ssp-buffer-size=4'])
     env.Append(CPPDEFINES = ['_FORTIFY_SOURCE=2'])
 
+if GetOption('coverage'):
+    env.Append(CFLAGS = ['--coverage'])
+    env.Append(LINKFLAGS = ['--coverage'])
 
 #put all .sconsign files in one place
 env.SConsignFile()