blob: 7f244cc084cc9f34f86a18cc4ea89c53fe1d9930 [file] [log] [blame]
Heather Lee Wilsonbdd62c52013-12-28 15:12:39 -08001# 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
15AC_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])