build lib/runvxenlight only if xen version is greater than 4.9

Signed-off-by: Wang Xu <[email protected]>

Author: gnawux

Makefile.am

@@ -5,6 +5,12 @@ else
 XEN_BUILD_TAG=
 endif
 
+if WITH_XEN490
+XEN490_BUILD_TAG=with_xen490
+else
+XEN490_BUILD_TAG=
+endif
+
 if WITH_LIBVIRT
 LIBVIRT_BUILD_TAG=with_libvirt
 else
@@ -13,7 +19,7 @@ endif
 
 COMMIT=`git describe --dirty --always --tags 2> /dev/null || true`
 GOLDFLAGS="-X main.gitCommit=${COMMIT} -X main.version=${VERSION}"
-HYPER_BULD_TAGS=$(XEN_BUILD_TAG) $(LIBVIRT_BUILD_TAG)
+HYPER_BULD_TAGS=$(XEN_BUILD_TAG) $(XEN490_BUILD_TAG) $(LIBVIRT_BUILD_TAG)
 
 all-local: build-runv
 clean-local:

configure.ac

@@ -70,11 +70,21 @@ if test "x$with_xen" != "xno" ; then
     fi
 fi
 
+XENPV_REQUIRED="4.9.0"
+
+if test "$with_xen" = yes; then
+	PKG_CHECK_MODULES([xenlight], [xenlight >= $XENPV_REQUIRED], [with_xen490=yes], [with_xen490=no])
+fi
+
 if test "x$with_xen" != "xno" ; then
     AC_DEFINE_UNQUOTED([WITH_XEN], 1, [run hyperd with xen])
 fi
+if test "x$with_xen490" = "xyes" ; then
+    AC_DEFINE_UNQUOTED([WITH_XEN490], 1, [run runv with xen 4.9 or above])
+fi
 
 AM_CONDITIONAL([WITH_XEN], [test "x$with_xen" == "xyes"])
+AM_CONDITIONAL([WITH_XEN490], [test "x$with_xen490" == "xyes"])
 
 AC_CONFIG_FILES([Makefile])
 

hypervisor/xenpv/xenpv.go

@@ -1,4 +1,4 @@
-// +build linux,with_xen
+// +build linux,with_xen490
 
 package xenpv
 

hypervisor/xenpv/xenpv_unsupported.go

@@ -1,4 +1,4 @@
-// +build !with_xen
+// +build !with_xen490
 
 package xenpv
 

lib/runvxenlight/xenlight-runv.go

@@ -1,4 +1,4 @@
-// +build linux,with_xen
+// +build linux,with_xen490
 
 /*
  *

lib/runvxenlight/xenlight.go

@@ -1,3 +1,5 @@
+// +build linux,with_xen490
+
 /*
  * Copyright (C) 2016 George W. Dunlap, Citrix Systems UK Ltd
  *