Re: SL 6.7 Kernel headers misses typedef sa_family_t
Dear Mark, thanks for your investigation. Indeed, I had included linux/can.h before sys/socket.h (which includes bits/sockaddr.h, and should *not* be included directly) so the compiler struggled. After swapping the include lines, and including sys/socket.h before linux/can.h, it compiles fine. So again, many thanks! Best regards, André Am 14.01.2016 um 15:33 schrieb Mark Stodola: On 01/14/2016 04:06 AM, André Hartmann wrote: Hello List, I have written a program which uses SocketCAN for CAN communication. The development takes place under Ubuntu Linux and compilation is fine there (also cross-compilation for an embedded ARM Linux). But when I compile my program under Scientific Linux 6.7, I get the following errors: " In file included from socket_can/receivethread.h:6, from socket_can/receivethread.c:4: /usr/include/linux/can.h:81: error: expected specifier-qualifier-list before 'sa_family_t' socket_can/receivethread.c: In function 'receivethread_init': socket_can/receivethread.c:52: error: 'struct sockaddr_can' has no member named 'can_family' socket_can/receivethread.c:53: error: 'struct sockaddr_can' has no member named 'can_ifindex' " Searching for the definition of sa_family_t gave a lot of usages, but no definition: $ cd /usr/include/linux $ grep -r sa_family_t llc.h:sa_family_t sllc_family;/* AF_LLC */ llc.h:sa_family_tsllc_arphrd;/* ARPHRD_ETHER */ llc.h:unsigned char __pad[__LLC_SOCK_SIZE__ - sizeof(sa_family_t) * 2 - rose.h:sa_family_tsrose_family; rose.h:sa_family_tsrose_family; x25.h:sa_family_t sx25_family;/* Must be AF_X25 */ if_pppox.h: sa_family_t sa_family;/* address family, AF_PPPOX */ if_pppox.h:sa_family_t sa_family; /* address family, AF_PPPOX */ in.h: sa_family_tsin_family;/* Address family*/ ax25.h:sa_family_tsax25_family; ipx.h:sa_family_tsipx_family; netlink.h:#include /* for sa_family_t */ netlink.h:sa_family_tnl_family;/* AF_NETLINK*/ can.h:sa_family_t can_family; phonet.h:sa_family_t spn_family; phonet.h:__u8 spn_zero[sizeof(struct sockaddr) - sizeof(sa_family_t) - 3]; un.h:sa_family_t sun_family;/* AF_UNIX */ irda.h:sa_family_t sir_family; /* AF_IRDA */ atalk.h:sa_family_t sat_family; If I add the typedef to socket.h, everything is fine until the next kernel update: typedef unsigned short sa_family_t; The system is: $ uname -a Linux sl67-x64 2.6.32-573.12.1.el6.x86_64 #1 SMP Tue Dec 15 08:24:23 CST 2015 x86_64 x86_64 x86_64 GNU/Linux Any opinion on this? Best regards, André It looks like sa_family_t has been morphing over time. In SL5, it is indeed defined in linux/socket.h. In SL6 I find it defined in bits/sockaddr.h. In SL7 it continues to be in bits/sockaddr.h, but there is also __kernel_sa_family_t defined in linux/socket.h. Try adding bits/sockaddr.h to your includes. -Mark
Re: SL 6.7 Kernel headers misses typedef sa_family_t
On 01/14/2016 04:06 AM, André Hartmann wrote: Hello List, I have written a program which uses SocketCAN for CAN communication. The development takes place under Ubuntu Linux and compilation is fine there (also cross-compilation for an embedded ARM Linux). But when I compile my program under Scientific Linux 6.7, I get the following errors: " In file included from socket_can/receivethread.h:6, from socket_can/receivethread.c:4: /usr/include/linux/can.h:81: error: expected specifier-qualifier-list before 'sa_family_t' socket_can/receivethread.c: In function 'receivethread_init': socket_can/receivethread.c:52: error: 'struct sockaddr_can' has no member named 'can_family' socket_can/receivethread.c:53: error: 'struct sockaddr_can' has no member named 'can_ifindex' " Searching for the definition of sa_family_t gave a lot of usages, but no definition: $ cd /usr/include/linux $ grep -r sa_family_t llc.h:sa_family_t sllc_family;/* AF_LLC */ llc.h:sa_family_tsllc_arphrd;/* ARPHRD_ETHER */ llc.h:unsigned char __pad[__LLC_SOCK_SIZE__ - sizeof(sa_family_t) * 2 - rose.h:sa_family_tsrose_family; rose.h:sa_family_tsrose_family; x25.h:sa_family_t sx25_family;/* Must be AF_X25 */ if_pppox.h: sa_family_t sa_family;/* address family, AF_PPPOX */ if_pppox.h:sa_family_t sa_family; /* address family, AF_PPPOX */ in.h: sa_family_tsin_family;/* Address family*/ ax25.h:sa_family_tsax25_family; ipx.h:sa_family_tsipx_family; netlink.h:#include /* for sa_family_t */ netlink.h:sa_family_tnl_family;/* AF_NETLINK*/ can.h:sa_family_t can_family; phonet.h:sa_family_t spn_family; phonet.h:__u8 spn_zero[sizeof(struct sockaddr) - sizeof(sa_family_t) - 3]; un.h:sa_family_t sun_family;/* AF_UNIX */ irda.h:sa_family_t sir_family; /* AF_IRDA */ atalk.h:sa_family_t sat_family; If I add the typedef to socket.h, everything is fine until the next kernel update: typedef unsigned short sa_family_t; The system is: $ uname -a Linux sl67-x64 2.6.32-573.12.1.el6.x86_64 #1 SMP Tue Dec 15 08:24:23 CST 2015 x86_64 x86_64 x86_64 GNU/Linux Any opinion on this? Best regards, André It looks like sa_family_t has been morphing over time. In SL5, it is indeed defined in linux/socket.h. In SL6 I find it defined in bits/sockaddr.h. In SL7 it continues to be in bits/sockaddr.h, but there is also __kernel_sa_family_t defined in linux/socket.h. Try adding bits/sockaddr.h to your includes. -Mark
Re: SL 6.7 Kernel headers misses typedef sa_family_t
On Thu, 14 Jan 2016, Mark Stodola wrote: It looks like sa_family_t has been morphing over time. In SL5, it is indeed defined in linux/socket.h. In SL6 I find it defined in bits/sockaddr.h. In SL7 it continues to be in bits/sockaddr.h, but there is also __kernel_sa_family_t defined in linux/socket.h. Try adding bits/sockaddr.h to your includes. That probably should be . From the sockaddr.h: * Never include this file directly; use instead. Antonio Querubin e-mail: t...@lavanauts.org xmpp: antonioqueru...@gmail.com
