udhcpc: do not accept --background on NOMMU (same as -b)

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/networking/udhcp/dhcpc.c b/networking/udhcp/dhcpc.c
index 1ccfff437..6aa6731fb 100644
--- a/networking/udhcp/dhcpc.c
+++ b/networking/udhcp/dhcpc.c
@@ -73,7 +73,9 @@ static const char udhcpc_longopts[] ALIGN1 =
         "request-option\0" Required_argument "O"
         "no-default-options\0" No_argument   "o"
         "foreground\0"     No_argument       "f"
+        USE_FOR_MMU(
         "background\0"     No_argument       "b"
+        )
         "broadcast\0"      No_argument       "B"
         IF_FEATURE_UDHCPC_ARPING("arping\0"     Optional_argument "a")
         IF_FEATURE_UDHCP_PORT("client-port\0"   Required_argument "P")