mk: move log_rpc from inside log

The log_rpc library has several dependencies which depend upon the log
library. This creates a circular dependency chain that makes single
threaded make unwieldy and makes multi-threaded make impossible.

Change-Id: I35e6532afcabce0f25974ed97444a56975654904
Signed-off-by: Seth Howell <seth.howell@intel.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/465192
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>

lib/Makefile

@@ -35,8 +35,8 @@ SPDK_ROOT_DIR := $(abspath $(CURDIR)/..)
 include $(SPDK_ROOT_DIR)/mk/spdk.common.mk
 
 DIRS-y += bdev blob blobfs conf copy event json jsonrpc \
-          log lvol net rpc sock thread trace util nvme vmd nvmf scsi ioat \
+          log log_rpc lvol net rpc sock thread trace util nvme vmd nvmf scsi \
-          ut_mock iscsi notify
+          ioat ut_mock iscsi notify
 ifeq ($(OS),Linux)
 DIRS-y += nbd ftl
 endif

lib/log/Makefile

@@ -40,6 +40,4 @@ ifeq ($(CONFIG_LOG_BACKTRACE),y)
 LOCAL_SYS_LIBS += -lunwind
 endif
 
-DIRS-y = rpc
-
 include $(SPDK_ROOT_DIR)/mk/spdk.lib.mk

lib/log_rpc/Makefile

@@ -31,7 +31,7 @@
 #  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #
 
-SPDK_ROOT_DIR := $(abspath $(CURDIR)/../../..)
+SPDK_ROOT_DIR := $(abspath $(CURDIR)/../..)
 include $(SPDK_ROOT_DIR)/mk/spdk.common.mk
 
 C_SRCS = log_rpc.c