kni: fix build clean on Ubuntu

The $(comma) variable is not defined in this Makefile, nor in
any included Makefile. Seen while doing a "make clean" on ubuntu:

  $ make clean
  == Clean lib
  == Clean lib/librte_compat
  == Clean lib/librte_eal
  == Clean lib/librte_eal/common
  == Clean lib/librte_eal/linuxapp
  == Clean lib/librte_eal/linuxapp/eal
  == Clean lib/librte_eal/linuxapp/igb_uio
  == Clean lib/librte_eal/linuxapp/kni
  tr: missing operand after ‘.-’
  Two strings must be given when translating.
  Try 'tr --help' for more information.

This commit replaces $(comma) by a ',' character, it's not a problem in
that case since we are inside antiquotes.

Fixes: a09b359daca3 ("kni: fix build on Ubuntu 14.04")

Signed-off-by: Olivier Matz <olivier.matz@6wind.com>
Acked-by Ferruh Yigit <ferruh.yigit@intel.com>

diff --git a/lib/librte_eal/linuxapp/kni/Makefile b/lib/librte_eal/linuxapp/kni/Makefile
index ac99d3f..8cc6b61 100644 (file)
--- a/lib/librte_eal/linuxapp/kni/Makefile
+++ b/lib/librte_eal/linuxapp/kni/Makefile
@@ -47,7 +47,7 @@ MODULE_CFLAGS += -Wall -Werror
 ifeq ($(shell lsb_release -si 2>/dev/null),Ubuntu)
 MODULE_CFLAGS += -DUBUNTU_RELEASE_CODE=$(shell lsb_release -sr | tr -d .)
 UBUNTU_KERNEL_CODE := $(shell echo `grep UTS_RELEASE $(RTE_KERNELDIR)/include/generated/utsrelease.h \
-        | cut -d '"' -f2 | cut -d- -f1,2 | tr .- $(comma)`,1)
+        | cut -d '"' -f2 | cut -d- -f1,2 | tr .- ,`,1)
 MODULE_CFLAGS += -D"UBUNTU_KERNEL_CODE=UBUNTU_KERNEL_VERSION($(UBUNTU_KERNEL_CODE))"
 endif