buildsystem: add SCM_TIMESTAMPING_OPT_STATS if not already defined

CMakeLists.txt

@@ -18,6 +18,7 @@ set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -DSO_RXQ_OVFL=40")
 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -DPF_CAN=29")
 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -DAF_CAN=PF_CAN")
 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -DN_SLCAN=17")
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -DSCM_TIMESTAMPING_OPT_STATS=54")
 
 include_directories (.)
 include_directories (./include)

Makefile

@@ -50,6 +50,7 @@ CPPFLAGS += \
 	-DAF_CAN=PF_CAN \
 	-DPF_CAN=29 \
 	-DSO_RXQ_OVFL=40 \
+	-DSCM_TIMESTAMPING_OPT_STATS=54 \
 	-D_FILE_OFFSET_BITS=64 \
 	-D_GNU_SOURCE
 

configure.ac

@@ -88,6 +88,9 @@ AC_CHECK_DECL(AF_CAN,,
 AC_CHECK_DECL(N_SLCAN,,
     [AC_DEFINE([N_SLCAN], [17], [N_SLCAN])]
 )
+AC_CHECK_DECL(SCM_TIMESTAMPING_OPT_STATS,,
+    [AC_DEFINE([SCM_TIMESTAMPING_OPT_STATS], [54], [SCM_TIMESTAMPING_OPT_STATS])]
+)
 AC_DEFINE(_GNU_SOURCE)