mk: fix static link with glibc < 2.17

There is an error when linking static EAL library with an application:

eal_alarm.c:(.text+0xd7): undefined reference to `clock_gettime'
eal_alarm.c:(.text+0x20f): undefined reference to `clock_gettime'
eal_timer.c:(.text+0x108): undefined reference to `clock_gettime'
eal_timer.c:(.text+0x146): undefined reference to `clock_gettime'

The function clock_gettime() is in librt for old glibc.

Fixes: 281948b4753e ("mk: fix missing librt dependencies")

Signed-off-by: Thomas Monjalon <thomas.monjalon@6wind.com>
Tested-by: Yongjie Gu <yongjiex.gu@intel.com>

diff --git a/mk/rte.app.mk b/mk/rte.app.mk
index 886dbdd..eb28e11 100644 (file)
--- a/mk/rte.app.mk
+++ b/mk/rte.app.mk
@@ -151,6 +151,7 @@ _LDLIBS-y += --no-whole-archive
 ifeq ($(CONFIG_RTE_BUILD_SHARED_LIB),n)
 # The static libraries do not know their dependencies.
 # So linking with static library requires explicit dependencies.
+_LDLIBS-$(CONFIG_RTE_LIBRTE_EAL)            += -lrt
 _LDLIBS-$(CONFIG_RTE_LIBRTE_SCHED)          += -lm
 _LDLIBS-$(CONFIG_RTE_LIBRTE_SCHED)          += -lrt
 _LDLIBS-$(CONFIG_RTE_LIBRTE_METER)          += -lm