Set config.install.sudo to [null] if sudo is empty

1 files changed, 6 insertions, 1 deletions

diff --git a/build.sh b/build.sh
index c70f66f..5081c2c 100755
--- a/build.sh
+++ b/build.sh
@@ -139,7 +139,12 @@ case "$sys" in
     ;;
   *)
     conf_rpath="$idir/lib"
-    conf_sudo="$sudo"
+
+    if test -n "$sudo"; then
+      conf_sudo="$sudo"
+    else
+      conf_sudo="[null]"
+    fi
     ;;
 esac