docker: correctly escape $BACKEND in the help output
In Makefiles the $ must be escaped as $$ in shell uses.
Since 8a2390a4f47:
$ make docker
[...]
NETWORK=1 Enable virtual network interface with default backend.
NETWORK=ACKEND Enable virtual network interface with ACKEND.
Once escaped:
$ make docker
[...]
NETWORK=1 Enable virtual network interface with default backend.
NETWORK=$BACKEND Enable virtual network interface with $BACKEND.
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Fam Zheng <famz@redhat.com>
Message-Id: <20171108024719.8389-1-f4bug@amsat.org>
Signed-off-by: Fam Zheng <famz@redhat.com>
diff --git a/tests/docker/Makefile.include b/tests/docker/Makefile.include
index f1a398e..de87341 100644
--- a/tests/docker/Makefile.include
+++ b/tests/docker/Makefile.include
@@ -109,7 +109,7 @@
@echo ' DEBUG=1 Stop and drop to shell in the created container'
@echo ' before running the command.'
@echo ' NETWORK=1 Enable virtual network interface with default backend.'
- @echo ' NETWORK=$BACKEND Enable virtual network interface with $BACKEND.'
+ @echo ' NETWORK=$$BACKEND Enable virtual network interface with $$BACKEND.'
@echo ' NOUSER Define to disable adding current user to containers passwd.'
@echo ' NOCACHE=1 Ignore cache when build images.'
@echo ' EXECUTABLE=<path> Include executable in image.'