[CRIU] [PATCH] tools.mk: Define CC if not set to 'default'

[Radostin Stoyanov]

	FOO ?= bar

is equivalent to

	ifeq ($(origin FOO), undefined)
	FOO = bar
	endif

However, when CC is not set its value is 'default' rather than
'undefined'.

Signed-off-by: Radostin Stoyanov <rstoyanov1 at gmail.com>
---
 scripts/nmk/scripts/tools.mk | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/scripts/nmk/scripts/tools.mk b/scripts/nmk/scripts/tools.mk
index d756358d5..e62172dd9 100644
--- a/scripts/nmk/scripts/tools.mk
+++ b/scripts/nmk/scripts/tools.mk
@@ -6,7 +6,9 @@ RM		:= rm -f
 HOSTLD		?= ld
 LD		?= $(CROSS_COMPILE)$(HOSTLD)
 HOSTCC		?= gcc
-CC		?= $(CROSS_COMPILE)$(HOSTCC)
+ifeq ($(origin CC), default)
+CC		:= $(CROSS_COMPILE)$(HOSTCC)
+endif
 CPP		:= $(CC) -E
 AS		:= $(CROSS_COMPILE)as
 AR		:= $(CROSS_COMPILE)ar
-- 
2.20.1