Problem running/compiling bird for ARM

[Radoslaw Kamil Ejsmont]

Hi,

I did a bit of research on the error. I have added the following lines to dbdes.c in ospf_dbdes_receive function

-— SNIP --
unsigned int size = ntohs(ps_i->length);
/* log sizes */
log(L_ERR "OSPF DBDES packet is (%u B)", n->ip, size);
log(L_ERR "OSPF DBDES packet should be (%u B)", sizeof(struct ospf_dbdes_packet));
log(L_ERR "OSPF packet should be (%u B)", sizeof(struct ospf_packet));
log(L_ERR "IMMS should be (%u B)", sizeof(union imms));
log(L_ERR "Size of u8 %u", sizeof(u8));
log(L_ERR "Size of u16 %u", sizeof(u16));
log(L_ERR "Size of u32 %u", sizeof(u32));
log(L_ERR "Size of u64 %u", sizeof(u64));
log(L_ERR "Size of char %u", sizeof(char));
log(L_ERR "Size of short int %u", sizeof(short int));
log(L_ERR "Size of int %u", sizeof(int));
log(L_ERR "Size of long int %u", sizeof(long int));
log(L_ERR "Size of long long int %u", sizeof(long long int));
-— SNIP —

This is the result on my 32-bit ARM router:

Nov  2 21:38:35 router-2 daemon.err bird6: OSPF DBDES packet is (28 B)
Nov  2 21:38:35 router-2 daemon.err bird6: OSPF DBDES packet should be (32 B)
Nov  2 21:38:35 router-2 daemon.err bird6: OSPF packet should be (16 B)
Nov  2 21:38:35 router-2 daemon.err bird6: IMMS should be (4 B)
Nov  2 21:38:35 router-2 daemon.err bird6: Size of u8 1
Nov  2 21:38:35 router-2 daemon.err bird6: Size of u16 2
Nov  2 21:38:35 router-2 daemon.err bird6: Size of u32 4
Nov  2 21:38:35 router-2 daemon.err bird6: Size of u64 8
Nov  2 21:38:35 router-2 daemon.err bird6: Size of char 1
Nov  2 21:38:35 router-2 daemon.err bird6: Size of short int 2
Nov  2 21:38:35 router-2 daemon.err bird6: Size of int 4
Nov  2 21:38:35 router-2 daemon.err bird6: Size of long int 4
Nov  2 21:38:35 router-2 daemon.err bird6: Size of long long int 8


This is the result on 64-bit ubuntu 14.04 machine:

2014-11-02 22:57:14 <ERR> OSPF DBDES packet is (4269801472 B)
2014-11-02 22:57:14 <ERR> OSPF DBDES packet should be (28 B)
2014-11-02 22:57:14 <ERR> OSPF packet should be (16 B)
2014-11-02 22:57:14 <ERR> IMMS should be (1 B)
2014-11-02 22:57:14 <ERR> Size of u8 1
2014-11-02 22:57:14 <ERR> Size of u16 2
2014-11-02 22:57:14 <ERR> Size of u32 4
2014-11-02 22:57:14 <ERR> Size of u64 8
2014-11-02 22:57:14 <ERR> Size of char 1
2014-11-02 22:57:14 <ERR> Size of short int 2
2014-11-02 22:57:14 <ERR> Size of int 4
2014-11-02 22:57:14 <ERR> Size of long int 8
2014-11-02 22:57:14 <ERR> Size of long long int 8


I think that for some reason the ARM gcc () interprets this struct

struct immsb
{
#ifdef CPU_BIG_ENDIAN
  u8 padding:5;
  u8 i:1;
  u8 m:1;
  u8 ms:1;
#else
  u8 ms:1;
  u8 m:1;
  u8 i:1;
  u8 padding:5;
#endif
};

as 4 byte struct, instead of 1 byte subdivided into bit-long parts.

This is the GCC version:

# arm-linux-uclibc-gcc -v
Reading specs from /home/rejsmont/src/optware/mbwe-bluering/toolchain/mbwe-bluering-buildroot/build_arm_nofpu/staging_dir/lib/gcc/arm-linux-uclibc/3.4.2/specs
Configured with: /home/rejsmont/src/optware/mbwe-bluering/toolchain/mbwe-bluering-buildroot/toolchain_build_arm_nofpu/gcc-3.4.2/configure --prefix=/home/rejsmont/src/optware/mbwe-bluering/toolchain/mbwe-bluering-buildroot/build_arm_nofpu/staging_dir --build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu --target=arm-linux-uclibc --enable-languages=c,c++ --enable-shared --disable-__cxa_atexit --enable-target-optspace --with-gnu-ld --disable-nls --enable-threads --enable-multilib --with-float=soft
Thread model: posix
gcc version 3.4.2


Once again thanks in advance for help!


Best,

Radek

-- 
Radoslaw Kamil Ejsmont, Ph.D.
http://radoslaw.ejsmont.net