examples/ntb: fix clean target

When introducing this example, the cleanup from commit 7e9562a107f1
("examples: fix make clean when using pkg-config") was missed.

Fixes: c5eebf85badc ("examples/ntb: add example for NTB")
Cc: stable@dpdk.org
Signed-off-by: David Marchand <david.marchand@redhat.com>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>
Acked-by: Xiaoyun Li <xiaoyun.li@intel.com>

diff --git a/examples/ntb/Makefile b/examples/ntb/Makefile
index 4675570..d35dabc 100644 (file)
--- a/examples/ntb/Makefile
+++ b/examples/ntb/Makefile
@@ -42,4 +42,4 @@ build:
 .PHONY: clean
 clean:
        rm -f build/$(APP) build/$(APP)-static build/$(APP)-shared
-       rmdir --ignore-fail-on-non-empty build
+       test -d build && rmdir -p build || true