| # Allow users to override the namespace we define our application's classes in |
| # Arg $1 is the default namespace to use if --enable-namespace isn't present. |
| |
| # In general, $1 should be 'google', so we put all our exported symbols in a |
| # unique namespace that is not likely to conflict with anyone else. However, |
| # when it makes sense -- for instance, when publishing stl-like code -- you |
| # may want to go with a different default, like 'std'. |
| |
| # We guarantee the invariant that GOOGLE_NAMESPACE starts with ::, |
| # unless it's the empty string. Thus, it's always safe to do |
| # GOOGLE_NAMESPACE::foo and be sure you're getting the foo that's |
| # actually in the google namespace, and not some other namespace that |
| # the namespace rules might kick in. |
| |
| AC_DEFUN([AC_DEFINE_GOOGLE_NAMESPACE], |
| [google_namespace_default=[$1] |
| AC_ARG_ENABLE(namespace, [ --enable-namespace=FOO to define these Google |
| classes in the FOO namespace. --disable-namespace |
| to define them in the global namespace. Default |
| is to define them in namespace $1.], |
| [case "$enableval" in |
| yes) google_namespace="$google_namespace_default" ;; |
| no) google_namespace="" ;; |
| *) google_namespace="$enableval" ;; |
| esac], |
| [google_namespace="$google_namespace_default"]) |
| if test -n "$google_namespace"; then |
| ac_google_namespace="::$google_namespace" |
| ac_google_start_namespace="namespace $google_namespace {" |
| ac_google_end_namespace="}" |
| else |
| ac_google_namespace="" |
| ac_google_start_namespace="" |
| ac_google_end_namespace="" |
| fi |
| AC_DEFINE_UNQUOTED(GOOGLE_NAMESPACE, $ac_google_namespace, |
| Namespace for Google classes) |
| AC_DEFINE_UNQUOTED(_START_GOOGLE_NAMESPACE_, $ac_google_start_namespace, |
| Puts following code inside the Google namespace) |
| AC_DEFINE_UNQUOTED(_END_GOOGLE_NAMESPACE_, $ac_google_end_namespace, |
| Stops putting the code inside the Google namespace) |
| ]) |
