From 6a085256bb28d7542c22d6499668f8eb24f90444 Mon Sep 17 00:00:00 2001
From: Florian Forster <octo@google.com>
Date: Wed, 6 Dec 2017 10:00:09 +0100
Subject: [PATCH] configure: Be more verbose about why the grpc plugin cannot
 be built.

---
 configure.ac | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/configure.ac b/configure.ac
index 6f947be0..db4cae6f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -6383,8 +6383,18 @@ if test "x$with_libgps" = "xyes"; then
   plugin_gps="yes"
 fi
 
-if test "x$with_libgrpcpp" = "xyes" && test "x$with_libprotobuf" = "xyes" && test "x$have_protoc3" = "xyes" && test "x$GRPC_CPP_PLUGIN" != "x"; then
-  plugin_grpc="yes"
+plugin_grpc="yes"
+if test "x$GRPC_CPP_PLUGIN" = "x"; then
+  plugin_grpc="no (grpc_cpp_plugin not found)"
+fi
+if test "x$have_protoc3" != "xyes"; then
+  plugin_grpc="no (protoc3 not found)"
+fi
+if test "x$with_libprotobuf" != "xyes"; then
+  plugin_grpc="no (libprotobuf not found)"
+fi
+if test "x$with_libgrpcpp" != "xyes"; then
+  plugin_grpc="no (libgrpc++ not found)"
 fi
 
 if test "x$have_getifaddrs" = "xyes"; then
-- 
2.11.0