The following example shows the output for --dump_build_attributes:
...
** Section #12 '.ARM.attributes' (SHT_ARM_ATTRIBUTES)
Size : 69 bytes
0x000000: 41 33 00 00 00 61 65 61 62 69 00 01 29 00 00 00 A3...aeabi..)...
0x000010: 05 41 52 4d 37 54 44 4d 49 00 06 02 08 01 11 01 .ARM7TDMI.......
0x000020: 12 02 14 02 17 01 18 01 19 01 1a 01 1e 03 20 02 .............. .
0x000030: 41 52 4d 00 11 00 00 00 41 52 4d 00 01 09 00 00 ARM.....ARM.....
0x000040: 00 04 01 12 01 .....