libbinder_ndk: clearer error on host misconfigured
libbinder_ndk uses defaults libbinder_ndk_host_user in order to work
on host w/o bionic. Currently, if you try to use libbinder_ndk on host
without libbinder_ndk, you'll get many errors like "use of undeclared
identifier". Now the first error will be:
In file included from frameworks/native/libs/binder/ndk/include_ndk/android/binder_auto_utils.h:29:
frameworks/native/libs/binder/ndk/include_ndk/android/binder_ibinder.h:39:2: error: Android builds must be compiled against a specific API. If this is an android platform host build, you must use libbinder_ndk_host_user.
#error Android builds must be compiled against a specific API. If this is an \
Bug: N/A
Test: above
Change-Id: I99de02858137ed3af149694fb7224fdf88c0df26
diff --git a/libs/binder/ndk/include_ndk/android/binder_ibinder.h b/libs/binder/ndk/include_ndk/android/binder_ibinder.h
index 4d5c044..4560f22 100644
--- a/libs/binder/ndk/include_ndk/android/binder_ibinder.h
+++ b/libs/binder/ndk/include_ndk/android/binder_ibinder.h
@@ -34,6 +34,12 @@
#include <android/binder_status.h>
__BEGIN_DECLS
+
+#ifndef __ANDROID_API__
+#error Android builds must be compiled against a specific API. If this is an \
+ android platform host build, you must use libbinder_ndk_host_user.
+#endif
+
#if __ANDROID_API__ >= 29
// Also see TF_* in kernel's binder.h