More like you can't see that there is a letter symbol for those.

You probably just missed it (which can be easy to do amongst the many letter symbols that pack uses):

See how easy that is? Do you not feel better taking a positive slant rather than starting with a deliberate insult?

So I guess "Quad" means 4 int lengths?

Both this question and your original question are very ambiguous.

• A C int is at least 16 bits.
• A C long is at least 32 bits.
• A C long long is at least 64 bits.

I can't divine what your language and compiler chooses for int and long long, so please stop asking question in terms of ints and ask them in terms of bits or bytes.

I can't divine what your language and compiler chooses for int and long long, so please stop asking question in terms of ints and ask them in terms of bits or bytes.

The point is that the size of an int or long long depends on which compiler you are using. So as you can see, it is better to discuss these things in terms of bits or bytes (not int and long long) since that makes it clear what you are talking about.

Ok. Sure: I was asking if a Quad was 8 bytes long.

The necessary info is in Config.

$ perl -MConfig -le'print $Config{ivsize}'
4
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You can see that value in perl -V as well.

Of course, you could just try unpack 'Q'.

$ perl -le'unpack "Q", chr(0)x8; print "ok"'
Invalid type 'Q' in unpack at -e line 1.
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I take it ivsize==4 is good for what I want?

Alright, so I tried unpacking Q (and q) to no avail. But perl didn't spit out any errors when I try to assign 2^45 to a variable and then print it. Does that still mean perl isn't compiled to support 64 bit numbers? If so, how can I go about fixing this?