Member Avatar for sangi1981

Hi all,

I implemented a C program using my mac book.
Now, my client wants to migrate to windows OS (MinGW).

Program does many calculation using long double: on mac it works fine, otherwise on winz doesn't.

I read on internet the problem is that long double type is supposed to be a double type in WinZ, because it is no supported.

Making sizeof of double and long double, I obtain:
MAC
DOUBLE=8, LONG DOUBLE=16
WINZ
DOUBLE=8, LONG DOUBLE=12

Is there a solution or a workaround?
How can I "force" the use of long double or its simulation?

Sorry for my English.
Thanks in advance

Edited by sangi1981 because: Incorrect
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Member Avatar for Ancient Dragon

The size of long double is compiler-dependent, not operating system dependent. What compiler did you use on MS-Windows? I know Microsoft VC++ does not support long double -- the name is recognized the but the is the same as double. MinGW on MS-Windows (Code::Blocks) produces the same results that you posted. Why 12 I can only guess is sizeof(long) + sizeof(double).

Edited by Ancient Dragon
Member Avatar for sangi1981

So, is there any way to bring my program in windows and make sure that is working properly, as it happens on the mac?

Member Avatar for Ancient Dragon

Here is a blog that may help you. You might use a different compiler, such as Intel. The blog also discusses some other options.

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