[dpdk-dev] [PATCH v5] examples/vm_power_manager: fix libvirt dependency check

[Thomas Monjalon]

From: Marvin Liu <yong.liu at intel.com>

vm_power_manager utilize libvirt API virDomainGetVcpuPinInfo to
retrieve domU vcpu information. This API is implemented from version 0.9.3.
Suse11 SP3 32bit default libvirt version is 0.8.8.

examples/vm_power_manager/channel_manager.c:
channel_manager.c:117:3: error: implicit declaration of function
'virDomainGetVcpuPinInfo'

Check and skip it from examples or raise an error when trying to compile
without libvirt or with a too old libvirt.

Fixes: e8ae9b662 ("examples/vm_power: channel manager and monitor in host")

Signed-off-by: Marvin Liu <yong.liu at intel.com>
Signed-off-by: Thomas Monjalon <thomas.monjalon at 6wind.com>
Acked-by: Bruce Richardson <bruce.richardson at intel.com>
---
 examples/Makefile                  | 8 +++++++-
 examples/vm_power_manager/Makefile | 6 ++++++
 2 files changed, 13 insertions(+), 1 deletion(-)

v5: do not warn if CONFIG_RTE_LIBRTE_POWER is disabled

v4: mix v2 and v3 to skip in examples list but raise an error if trying
    to compile directly

diff --git a/examples/Makefile b/examples/Makefile
index a8bc381..b28b30e 100644
--- a/examples/Makefile
+++ b/examples/Makefile
@@ -87,6 +87,12 @@ DIRS-$(CONFIG_RTE_LIBRTE_VHOST) += vhost
 DIRS-$(CONFIG_RTE_LIBRTE_XEN_DOM0) += vhost_xen
 DIRS-y += vmdq
 DIRS-y += vmdq_dcb
-DIRS-$(CONFIG_RTE_LIBRTE_POWER) += vm_power_manager
+ifeq ($(CONFIG_RTE_LIBRTE_POWER), y)
+ifeq ($(shell pkg-config --atleast-version=0.9.3 libvirt; echo $$?), 0)
+DIRS-y += vm_power_manager
+else
+$(info vm_power_manager requires libvirt >= 0.9.3)
+endif
+endif
 
 include $(RTE_SDK)/mk/rte.extsubdir.mk
diff --git a/examples/vm_power_manager/Makefile b/examples/vm_power_manager/Makefile
index 113dbc4..59a9641 100644
--- a/examples/vm_power_manager/Makefile
+++ b/examples/vm_power_manager/Makefile
@@ -29,6 +29,10 @@
 #   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 #   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+ifneq ($(shell pkg-config --atleast-version=0.9.3 libvirt; echo $$?), 0)
+$(error vm_power_manager requires libvirt >= 0.9.3)
+else
+
 ifeq ($(RTE_SDK),)
 $(error "Please define RTE_SDK environment variable")
 endif
@@ -57,3 +61,5 @@ CFLAGS_main.o += -Wno-return-type
 endif
 
 include $(RTE_SDK)/mk/rte.extapp.mk
+
+endif # libvirt check
-- 
2.7.0