+# --with-grpc {{{
+AC_ARG_WITH(grpc, [AS_HELP_STRING([--without-grpc], [Disable gRPC (default: autodetect).])],
+[
+ with_grpc="$withval"
+],
+[
+ with_grpc="yes"
+])
+
+if test "x$with_grpc" = "xyes"
+then
+ if test "x$have_protoc3" != "xyes"
+ then
+ with_grpc="no (requires protoc 3.0.0+)"
+ else if test "x$GRPC_CPP_PLUGIN" = "x"
+ then
+ with_grpc"no (requires grpc_cpp_plugin)"
+ fi; fi
+fi
+
+if test "x$with_grpc" = "xyes"
+then
+ AC_MSG_CHECKING([whether $CXX accepts -std=c++11])
+ if test_cxx_flags -std=c++11; then
+ AC_MSG_RESULT([yes])
+ else
+ AC_MSG_RESULT([no])
+ with_grpc="no (requires C++11 support)"
+ fi
+fi
+
+if test "x$with_grpc" = "xyes"
+then
+ AC_LANG_PUSH(C++)
+ SAVE_CPPFLAGS="$CPPFLAGS"
+ SAVE_CXXFLAGS="$CXXFLAGS"
+ CPPFLAGS="$CPPFLAGS -std=c++11"
+ CXXFLAGS="$CXXFLAGS -std=c++11"
+ AC_CHECK_HEADERS([grpc++/grpc++.h], [],
+ [with_grpc="no (grpc++/grpc++.h not found)"])
+ CPPFLAGS="$SAVE_CPPFLAGS"
+ CXXFLAGS="$SAVE_CXXFLAGS"
+ AC_LANG_POP(C++)
+fi
+with_libgrpc="no"
+if test "x$with_grpc" = "xyes"
+then
+ AC_LANG_PUSH(C++)
+ AC_CHECK_LIB([grpc], [grpc_register_plugin],
+ [with_libgrpc="yes"],
+ [with_grpc="no (libgrpc not found)"],
+ [-lgpr -lprotobuf])
+ AC_LANG_POP(C++)
+fi
+# }}}
+