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

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>
pull/392/head
Juergen Borleis 2019-10-17 13:45:14 +02:00 committed by Marc Kleine-Budde
parent 3c88cfc1ec
commit 578f42aac8
1 changed files with 10 additions and 5 deletions
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15
configure.ac
View File

@ -80,19 +80,24 @@ AC_CHECK_FUNCS([ \
AC_SEARCH_LIBS([clock_nanosleep], [rt]) AC_SEARCH_LIBS([clock_nanosleep], [rt])
AC_CHECK_DECL(SO_RXQ_OVFL,, 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_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_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_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_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>]]
) )