little endianness revealed!

ctest.c

long long y = 0xaabbccddeeff0123LL;

/*
compile the above with cc -c ctest.c
and open your binary editor. in VIM open the object file with 
vim -b ctest.o
then :%! xxd
and look for the line with your variable
This is how it looks like on my mac m1

00000180: 0000 0000 0000 0000 2301 ffee ddcc bbaa  ........#.......

The real binary representation of my long long is 
2301 ffee ddcc bbaa

little endian means the least significant byte first . Byte not bit!
in hex a byte is 2 digit btw... so 0x23 is the lsb.

On Ubuntu 22 I get the obj file to be slightly different but my variable is 
still there
00000040: 2301 ffee ddcc bbaa 0055 6275 6e74 7520  #........Ubuntu  

so here the binary is the same as on my mac
2301 ffee ddcc bbaa
*/