From c363aae8d1d8419f08a85d92d7a7a75d433c06d0 Mon Sep 17 00:00:00 2001
From: Martin Baulig <martin.baulig@xamarin.com>
Date: Wed, 15 Feb 2017 19:13:58 +0100
Subject: [PATCH] [btls]: Make configure fail when building on Android without
 '--with-btls-android-ndk'.

When building on Android with BTLS support, the '--with-btls-android-ndk' argument
is required to teach the underlying cmake the NDK location.  Fixes #52511.
---
 configure.ac | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/configure.ac b/configure.ac
index 4778f68234b..387b6d297ba 100644
--- a/configure.ac
+++ b/configure.ac
@@ -4106,6 +4106,8 @@ if test "x$enable_btls" = "xyes"; then
 		BTLS_CMAKE_ARGS="$BTLS_CMAKE_ARGS -DCMAKE_TOOLCHAIN_FILE=$BTLS_ROOT/util/android-cmake/android.toolchain.cmake"
 		if test "x$with_btls_android_ndk" != "x"; then
 			BTLS_CMAKE_ARGS="$BTLS_CMAKE_ARGS -DANDROID_NDK=\"$with_btls_android_ndk\""
+		else
+			AC_MSG_ERROR([Need to pass the --with-btls-android-ndk argument when building with BTLS support on Android.])
 		fi
 	fi
 
-- 
2.25.1