STL std::random_shuffle behavior fails with lrand48

Jim Kleckner jek-cygwin@kleckner.net
Wed Aug 4 06:16:00 GMT 2004


Arturus Magi wrote:

> Jim Kleckner wrote:
> 
>> Version of cygwin is current (see attached file
>> for all version stamps)
>> gcc                     3.3.1-3
>> gcc-g++                 3.3.1-3
>>
>> version of gcc/g++ on Linux is 2.96.
>>
>> The test program is attached as is cygcheck output.
>>
>> To run it just type (note that -mno-cygwin is *not* used):
>> g++ xxx.cpp
>> ./a.exe
>>
>> Is this a configuration issue?  Or does lrand48 not work?
>> Or is it a long vs. int type mismatch?
>>
> 
> Try upgrading the version of gcc on the Linux box before comparing. 
> There are a number of differences between gcc2 and gcc3 that may be 
> affecting things.

This succeeds on an up to date Gentoo system.
So the problem appears to be local to cygwin.

=== From a gentoo user:

My gcc and g++ versions are 3.3.3 20040412.

[reid@reid-ws reid]$ g++ xxx.cpp
[reid@reid-ws reid]$ ./a.out

changes before:
0 1 2 3 4 5 6
changes after:
1 4 2 3 5 6 0
changes after:
0 6 2 1 4 5 3
changes after:
0 1 3 6 5 4 2

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