From e898c8a854cf221ac8f0034df7dadf8b983c4366 Mon Sep 17 00:00:00 2001
From: Marc Kleine-Budde <mkl@pengutronix.de>
Date: Tue, 24 Jan 2023 09:49:25 +0100
Subject: [PATCH] buildsystem: add missing defines for CLOCK_TAI, SO_TXTIME and
 SCM_TXTIME

The commit c6f2cf7c2f27 ("cangen: add support for SO_TXTIME") relies
on several toolchain features ("CLOCK_TAI", "SO_TXTIME", "SCM_TXTIME")
which are not present in old toolchain.

Add defines to fix compilation on older toolchains.

Reported-by: https://github.com/b-thomson
Link: https://github.com/linux-can/can-utils/issues/398
Fixes: c6f2cf7c2f27 ("cangen: add support for SO_TXTIME")
---
 CMakeLists.txt |  3 +++
 configure.ac   | 12 ++++++++++++
 2 files changed, 15 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index a4e8484..09ccd80 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -18,6 +18,9 @@ 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")
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -DCLOCK_TAI=11")
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -DSO_TXTIME=61")
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -DSCM_TXTIME=SO_TXTIME")
 
 include_directories (.)
 include_directories (./include)
diff --git a/configure.ac b/configure.ac
index c91d844..5493c9c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -99,6 +99,18 @@ AC_CHECK_DECL(SCM_TIMESTAMPING_OPT_STATS,,
     [AC_DEFINE([SCM_TIMESTAMPING_OPT_STATS], [54], [SCM_TIMESTAMPING_OPT_STATS])],
     [[#include <linux/net.h>]]
 )
+AC_CHECK_DECL(CLOCK_TAI,,
+    [AC_DEFINE([CLOCK_TAI], [11], [CLOCK_TAI])],
+    [[#include <time.h>]]
+)
+AC_CHECK_DECL(SO_TXTIME,,
+    [AC_DEFINE([SO_TXTIME], [61], [SO_TXTIME])],
+    [[#include <sys/socket.h>]]
+)
+AC_CHECK_DECL(SCM_TXTIME,,
+    [AC_DEFINE([SCM_TXTIME], [SO_TXTIME], [SCM_TXTIME])],
+    [[#include <sys/socket.h>]]
+)
 
 
 #