64bit integer literals on 32bit platforms

[Gereon Kremer]

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Hi,

We are using gmp in a library project that is supposed to work on both
32bit and 64bit platforms.
However, we ran into problem when we used integer literals that are
larger than 2^32 (say 10000000000).
Consider the following code:

#include <gmpxx.h>
int main() {
mpz_class x(10000000000);
}

On 64bit platforms, everything will be fine. On 32bit however, gmp only
provides constructors from char, short, int and long int, but not long
long int. Thus, compilers (g++, clang++) will tell you that the
constructor is ambiguous.

Tested on Ubuntu 14.04 (32bit), prepackaged gmp 5.1.3, g++ 4.8.2,
clang++ 3.4

Best regards,
Gereon Kremer

- -- 
Gereon Kremer
Lehr- und Forschungsgebiet Theorie Hybrider Systeme
RWTH Aachen
Tel: +49 241 80 21243
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