diff --git a/configure.ac b/configure.ac
index 5ecdc4d125..a082d3f127 100644
--- a/configure.ac
+++ b/configure.ac
@@ -128,6 +128,14 @@ for retry in "none" "--std=c++11" "--std=c++0x" "--std=c++1x" "fail"; do
 		AC_MSG_WARN([unsupported C++11 feature])
 		AC_MSG_NOTICE([retrying by adding $retry to $CXX])
 		CXX="$CXX_SAVED $retry"
+		AC_MSG_CHECKING($retry support)
+		AC_COMPILE_IFELSE(
+			[AC_LANG_PROGRAM(
+				[],
+				[int myincr = 1;])],
+			[AC_MSG_RESULT([yes])],
+			[AC_MSG_RESULT([no])
+			 continue])
 	fi
 
 	AC_MSG_CHECKING(std::unique_ptr support)
@@ -184,7 +192,7 @@ for retry in "none" "--std=c++11" "--std=c++0x" "--std=c++1x" "fail"; do
 	AC_COMPILE_IFELSE(
 		[AC_LANG_PROGRAM(
 			[],
-			[auto incr = [[]](int x) { return x + 1; };])],
+			[auto myincr = [[]](int x) { return x + 1; };])],
 		[AC_MSG_RESULT([yes])
 		 break],
 		[AC_MSG_RESULT([no])
@@ -1309,7 +1317,7 @@ if test "x$enable_gtest" = "xyes" ; then
                 [AC_MSG_ERROR([no gtest source at $GTEST_SOURCE])])
         fi
         have_gtest_source=yes
-        GTEST_LDFLAGS="\$(top_builddir)/ext/gtest/libgtest.a"
+        GTEST_LDADD="\$(top_builddir)/ext/gtest/libgtest.a"
         DISTCHECK_GTEST_CONFIGURE_FLAG="--with-gtest-source=$GTEST_SOURCE"
         GTEST_INCLUDES="-I$GTEST_SOURCE -I$GTEST_SOURCE/include"
     fi