libxc: use $XEN_ROOT to reference libelf in xen

Stubdom needs to compile and link libelf in xen. Using relative path
breaks that.

Signed-off-by: Wei Liu <wei.liu2@citrix.com>

diff --git a/tools/libxc/Makefile b/tools/libxc/Makefile
index 1619c06d753c60d863609e668756a61bb34906c4..3a0a839481b1c61e053ed9264e1be57eafa53371 100644 (file)
--- a/tools/libxc/Makefile
+++ b/tools/libxc/Makefile
@@ -68,8 +68,8 @@ else
 GUEST_SRCS-y += xc_nomigrate.c
 endif
 
-vpath %.c ../../xen/common/libelf
-CFLAGS += -I../../xen/common/libelf
+vpath %.c $(XEN_ROOT)/xen/common/libelf
+CFLAGS += -I$(XEN_ROOT)/xen/common/libelf
 
 ELF_SRCS-y += libelf-tools.c libelf-loader.c
 ELF_SRCS-y += libelf-dominfo.c