blktap: CONFIG_GCRYPT detection

Wrap make variable in () to allow correct evaluation.

This fixes broken CONFIG_GCRYPT detection which was introduced by
commit 85896a7c4dc7b6b1dba2db79dfb0ca61738a92a4 in 2012.

Signed-off-by: Martin Pohlack <mpohlack@amazon.de>
Reviewed-by: Uwe Dannowski <uwed@amazon.de>
Reviewed-by: Anthony Liguori <aliguori@amazon.com>
Reviewed-by: Matt Wilson <msw@amazon.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>

diff --git a/tools/blktap/drivers/Makefile b/tools/blktap/drivers/Makefile
index 7461a95d678c2e443b76c3f080b7bedff64454ca..cea8b3b468f830c1a858b5592c4ebb3db885a8bf 100644 (file)
--- a/tools/blktap/drivers/Makefile
+++ b/tools/blktap/drivers/Makefile
@@ -11,7 +11,7 @@ CFLAGS   += $(CFLAGS_libxenctrl)
 CFLAGS   += $(CFLAGS_libxenstore)
 CFLAGS   += -D_GNU_SOURCE
 
-ifeq ($CONFIG_GCRYPT,y)
+ifeq ($(CONFIG_GCRYPT),y)
 CFLAGS += -DUSE_GCRYPT
 CRYPT_LIB := -lgcrypt
 else