1 # Allow users to override the namespace we define our application's classes in 2 # Arg $1 is the default namespace to use if --enable-namespace isn't present. 3 4 # In general, $1 should be 'google', so we put all our exported symbols in a 5 # unique namespace that is not likely to conflict with anyone else. However, 6 # when it makes sense -- for instance, when publishing stl-like code -- you 7 # may want to go with a different default, like 'std'. 8 9 # We guarantee the invariant that GOOGLE_NAMESPACE starts with ::, 10 # unless it's the empty string. Thus, it's always safe to do 11 # GOOGLE_NAMESPACE::foo and be sure you're getting the foo that's 12 # actually in the google namespace, and not some other namespace that 13 # the namespace rules might kick in. 14 15 AC_DEFUN([AC_DEFINE_GOOGLE_NAMESPACE], 16 [google_namespace_default=[$1] 17 AC_ARG_ENABLE(namespace, [ --enable-namespace=FOO to define these Google 18 classes in the FOO namespace. --disable-namespace 19 to define them in the global namespace. Default 20 is to define them in namespace $1.], 21 [case "$enableval" in 22 yes) google_namespace="$google_namespace_default" ;; 23 no) google_namespace="" ;; 24 *) google_namespace="$enableval" ;; 25 esac], 26 [google_namespace="$google_namespace_default"]) 27 if test -n "$google_namespace"; then 28 ac_google_namespace="::$google_namespace" 29 ac_google_start_namespace="namespace $google_namespace {" 30 ac_google_end_namespace="}" 31 else 32 ac_google_namespace="" 33 ac_google_start_namespace="" 34 ac_google_end_namespace="" 35 fi 36 AC_DEFINE_UNQUOTED(GOOGLE_NAMESPACE, $ac_google_namespace, 37 Namespace for Google classes) 38 AC_DEFINE_UNQUOTED(_START_GOOGLE_NAMESPACE_, $ac_google_start_namespace, 39 Puts following code inside the Google namespace) 40 AC_DEFINE_UNQUOTED(_END_GOOGLE_NAMESPACE_, $ac_google_end_namespace, 41 Stops putting the code inside the Google namespace) 42 ]) 43
