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Buildsystem: provide missing network/CAN related definitions on demand only

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Without the corresponding include file, these macros get always defined
locally and thus, shadows the ones from the system. This change ensures,
if the macros are found already defined in the system, then they are used.

Signed-off-by: Juergen Borleis <jbe@pengutronix.de>
This commit is contained in:
Juergen Borleis
2022-12-19 15:31:23 +01:00
committed by Marc Kleine-Budde
parent 3c88cfc1ec
commit 578f42aac8
1 changed files with 10 additions and 5 deletions
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configure.ac
+10 -5
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@@ -80,19 +80,24 @@ AC_CHECK_FUNCS([ \
AC_SEARCH_LIBS([clock_nanosleep], [rt])
AC_CHECK_DECL(SO_RXQ_OVFL,,
[AC_DEFINE([SO_RXQ_OVFL], [40], [SO_RXQ_OVFL])]
[AC_DEFINE([SO_RXQ_OVFL], [40], [SO_RXQ_OVFL])],
[[#include <linux/net.h>]]
)
AC_CHECK_DECL(PF_CAN,,
[AC_DEFINE([PF_CAN], [29], [PF_CAN])]
[AC_DEFINE([PF_CAN], [29], [PF_CAN])],
[[#include <net/if.h>]]
)
AC_CHECK_DECL(AF_CAN,,
[AC_DEFINE([AF_CAN], [PF_CAN], [AF_CAN])]
[AC_DEFINE([AF_CAN], [PF_CAN], [AF_CAN])],
[[#include <net/if.h>]]
)
AC_CHECK_DECL(N_SLCAN,,
[AC_DEFINE([N_SLCAN], [17], [N_SLCAN])]
[AC_DEFINE([N_SLCAN], [17], [N_SLCAN])],
[[#include <linux/tty.h>]]
)
AC_CHECK_DECL(SCM_TIMESTAMPING_OPT_STATS,,
[AC_DEFINE([SCM_TIMESTAMPING_OPT_STATS], [54], [SCM_TIMESTAMPING_OPT_STATS])]
[AC_DEFINE([SCM_TIMESTAMPING_OPT_STATS], [54], [SCM_TIMESTAMPING_OPT_STATS])],
[[#include <linux/net.h>]]
)