--- a/make/autoconf/flags.m4	Mon Mar 12 10:04:12 2018 -0400
+++ b/make/autoconf/flags.m4	Mon Mar 12 17:00:54 2018 +0100
@@ -362,8 +362,10 @@
   if test "x$BUILD_SYSROOT" != x; then
     FLAGS_SETUP_SYSROOT_FLAGS([BUILD_])
   else
-    BUILD_SYSROOT_CFLAGS="$SYSROOT_CFLAGS"
-    BUILD_SYSROOT_LDFLAGS="$SYSROOT_LDFLAGS"
+    if test "x$COMPILE_TYPE" != "xcross"; then
+      BUILD_SYSROOT_CFLAGS="$SYSROOT_CFLAGS"
+      BUILD_SYSROOT_LDFLAGS="$SYSROOT_LDFLAGS"
+    fi
   fi
   AC_SUBST(BUILD_SYSROOT_CFLAGS)
   AC_SUBST(BUILD_SYSROOT_LDFLAGS)