[dpdk-dev] [PATCH 06/15] xenvirt: Convert to use of PMD_REGISTER_DRIVER and fix linking

[Neil Horman <nhorman@tuxdriver.com>]

convert the xenvirt driver to use the PMD_REGISTER_DRIVER macro.
This means that the test applications now have no reference to the xenvirt library
when building DSO's and must specify its use on the command line with the -d
option.  Static linking will still initalize the driver automatically.

A few notes:

xenvirt was unbuildable as of commit 4c39baf297d10c217e7d3e7370f26a1fede58308..
That commit neglected to include the rte_vdev.h header, so several structs were
left undefined.  This patch includes a fix for that as well.

Also, The linkage for xenvirt is broken in much the same way pmd_ring was, in
that the xenvirt pmd has a function that is called directly from applications
(the example being the testpmd application).  The function is
rte_mempool_gntalloc_create, and should clearly be moved into the rte_mempool
library, with the supporting code in the function implementation moved to a new
xenvirt library separate from the pmd.  This is a large undertaking that
detracts from the purpose of this series however, and so for now, I'm leaving
the linkage to the application in place, and will address this issue in a later
series

Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
---
 lib/librte_pmd_xenvirt/rte_eth_xenvirt.c | 9 +++------
 mk/rte.app.mk                            | 7 +++----
 2 files changed, 6 insertions(+), 10 deletions(-)

diff --git a/lib/librte_pmd_xenvirt/rte_eth_xenvirt.c b/lib/librte_pmd_xenvirt/rte_eth_xenvirt.c
index 533aa76..df19d07 100644
--- a/lib/librte_pmd_xenvirt/rte_eth_xenvirt.c
+++ b/lib/librte_pmd_xenvirt/rte_eth_xenvirt.c
@@ -53,6 +53,8 @@
 #include <rte_malloc.h>
 #include <rte_memcpy.h>
 #include <rte_string_fns.h>
+#include <rte_vdev.h>
+#include <rte_pmd.h>
 #include <cmdline_parse.h>
 #include <cmdline_parse_etheraddr.h>
 
@@ -710,9 +712,4 @@ static struct rte_vdev_driver pmd_xenvirt_drv = {
 	.init = rte_pmd_xenvirt_devinit,
 };
 
-__attribute__((constructor))
-static void
-rte_pmd_xenvirt_init(void)
-{
-	rte_eal_vdev_driver_register(&pmd_xenvirt_drv);
-}
+PMD_REGISTER_DRIVER(pmd_xenvirt_drv, PMD_VDEV);
diff --git a/mk/rte.app.mk b/mk/rte.app.mk
index 4f167aa..e77bf39 100644
--- a/mk/rte.app.mk
+++ b/mk/rte.app.mk
@@ -158,16 +158,15 @@ ifeq ($(CONFIG_RTE_LIBRTE_EAL),y)
 LDLIBS += -lrte_eal
 endif
 
+ifeq ($(CONFIG_RTE_LIBRTE_CMDLINE),y)
+LDLIBS += -lrte_cmdline
+endif
 
 ifeq ($(CONFIG_RTE_LIBRTE_PMD_XENVIRT),y)
 LDLIBS += -lrte_pmd_xenvirt
 LDLIBS += -lxenstore
 endif
 
-ifeq ($(CONFIG_RTE_LIBRTE_CMDLINE),y)
-LDLIBS += -lrte_cmdline
-endif
-
 ifeq ($(RTE_BUILD_SHARED_LIB),n)
 
 ifeq ($(CONFIG_RTE_LIBRTE_PMD_RING),y)
-- 
1.8.3.1