union {
   int16_t  w;
   int8_t    b[2];
} chimera.

chimera x;
x.w = 0x100;
tes x.b[0]t 

> On Feb 4, 2024, at 11:48, David McClain <d...@refined-audiometrics.com> wrote:
> 
> #x100 will generally do it for me, for the past 50 years. Reads back as a 
> 2-byte stream as 00 01 on little-endian, and 01 00 on big-endian.
> 
> But yes, ARM is like Intel, little endian.
> 
> - DM
> 
>> On Feb 4, 2024, at 10:03, Marco Antoniotti <marco.antonio...@unimib.it> 
>> wrote:
>> 
>> Hello everybody,
>> 
>> I am in a rabbit hole (don't ask!), and I need to drag some other people 
>> with me.
>> 
>> What is the consensus about the most portable way to detect the endianness 
>> of a machine/platform?  (Ok, we can assume that while running on an ARM the 
>> endianness is "fixed" by the OS)
>> 
>> All the best
>> 
>> MA
>> 
>> --
>> Marco Antoniotti, Professor                  tel. +39 - 02 64 48 79 01
>> DISCo, Università Milano Bicocca U14 2043    http://dcb.disco.unimib.it 
>> <http://dcb.disco.unimib.it/>
>> Viale Sarca 336
>> I-20126 Milan (MI) ITALY
> 

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