[dpdk-stable] [PATCH v2 1/2] bus: fix missing pci bus with shared library build

[dpdk-stable] [PATCH v2 1/2] bus: fix missing pci bus with shared library build

[Stephen Hemminger]

If DPDK is built as a shared library, then any application linked
with rte.app.mk will not find any buses (including PCI devices).

This is because the linker will not call the initializers
of the bus libraries since they are not directly called by
application or EAL.

Bugzilla ID: 333
Fixes: c752998b5e2e ("pci: introduce library and driver")
Cc: stable@dpdk.org
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
 mk/rte.app.mk | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/mk/rte.app.mk b/mk/rte.app.mk
index a277c808ed8e..3b3156bfcf09 100644
--- a/mk/rte.app.mk
+++ b/mk/rte.app.mk
@@ -123,6 +123,10 @@ ifneq (,$(findstring y,$(MVEP-y)))
 _LDLIBS-y += -lrte_common_mvep -L$(LIBMUSDK_PATH)/lib -lmusdk
 endif
 
+# Bus devices use constructors to register and therefore
+# need to be always linked in (--whole-archive already enabled)
+_LDLIBS-y += --no-as-needed
+
 ifeq ($(CONFIG_RTE_LIBRTE_DPAA_BUS),y)
 _LDLIBS-$(CONFIG_RTE_LIBRTE_COMMON_DPAAX)   += -lrte_common_dpaax
 endif
@@ -137,6 +141,9 @@ ifeq ($(CONFIG_RTE_EAL_VFIO),y)
 _LDLIBS-$(CONFIG_RTE_LIBRTE_FSLMC_BUS)      += -lrte_bus_fslmc
 endif
 
+# drivers are as-needed
+_LDLIBS-y += --as-needed
+
 ifeq ($(CONFIG_RTE_BUILD_SHARED_LIB),n)
 # plugins (link only if static libraries)
 
-- 
2.20.1

[dpdk-stable] [PATCH v2 2/2] mk: fix missing mempool driver registration

[Stephen Hemminger]

Since mempool driver is now registered during constructor, the
mempool driver must always be linked in during shared library
build. Otherwise, application will fail because of missing default
mbuf pool operations.

Fixes: c6b3570f9e14 ("mk: link app with ring mempool by default")
Cc: stable@dpdk.org
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
 mk/rte.app.mk | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/mk/rte.app.mk b/mk/rte.app.mk
index 3b3156bfcf09..3e4580a2594c 100644
--- a/mk/rte.app.mk
+++ b/mk/rte.app.mk
@@ -87,7 +87,9 @@ _LDLIBS-$(CONFIG_RTE_LIBRTE_RAWDEV)         += -lrte_rawdev
 _LDLIBS-$(CONFIG_RTE_LIBRTE_TIMER)          += -lrte_timer
 _LDLIBS-$(CONFIG_RTE_LIBRTE_MEMPOOL)        += -lrte_mempool
 _LDLIBS-$(CONFIG_RTE_LIBRTE_STACK)          += -lrte_stack
+_LDLIBS-$(CONFIG_RTE_DRIVER_MEMPOOL_RING)   += --no-as-needed
 _LDLIBS-$(CONFIG_RTE_DRIVER_MEMPOOL_RING)   += -lrte_mempool_ring
+_LDLIBS-$(CONFIG_RTE_DRIVER_MEMPOOL_RING)   += --as-needed
 _LDLIBS-$(CONFIG_RTE_LIBRTE_OCTEONTX2_MEMPOOL) += -lrte_mempool_octeontx2
 _LDLIBS-$(CONFIG_RTE_LIBRTE_RING)           += -lrte_ring
 _LDLIBS-$(CONFIG_RTE_LIBRTE_PCI)            += -lrte_pci
-- 
2.20.1