[PATCH 2/3] build/tools: disable libvchan build on NetBSD

[Roger Pau Monne <roger.pau@citrix.com>]

NetBSD doesn't have a gntdev, so libvchan is unable to build due to
the lack of the header files gntalloc.h.

This is the error:

gcc  -O1 -fno-omit-frame-pointer -m64 -g -fno-strict-aliasing
-std=gnu99 -Wall -Wstrict-prototypes -Wdeclaration-after-statement
-D__XEN_TOOLS__ -MMD -MF .init.o.d -fno-optimize-sibling-calls
-I../include -I.
-I/root/xen/xen-netbsd/tools/libvchan/../../tools/xenstore
-I/root/xen/xen-netbsd/tools/libvchan/../../tools/include
-I/root/xen/xen-netbsd/tools/libvchan/../../tools/libxc
-I/root/xen/xen-netbsd/tools/libvchan/../../tools/include  -c -o
init.o init.c
init.c:45:30: fatal error: xen/sys/gntalloc.h: No such file or
directory
compilation terminated.
gmake[3]: *** [init.opic] Error 1
gmake[3]: *** Waiting for unfinished jobs....
init.c:45:30: fatal error: xen/sys/gntalloc.h: No such file or
directory
compilation terminated.

Signed-off-by: Roger Pau Monne <roger.pau@citrix.com>
---
 tools/Makefile |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/tools/Makefile b/tools/Makefile
index a74df2f..18a58e8 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -30,7 +30,7 @@ SUBDIRS-$(CONFIG_NetBSD) += blktap2
 SUBDIRS-$(CONFIG_NetBSD) += xenbackendd
 SUBDIRS-y += libfsimage
 SUBDIRS-$(LIBXENAPI_BINDINGS) += libxen
-SUBDIRS-y += libvchan
+SUBDIRS-$(CONFIG_Linux) += libvchan
 
 # do not recurse in to a dir we are about to delete
 ifneq "$(MAKECMDGOALS)" "distclean"
-- 
1.7.7.5 (Apple Git-26)