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Re: STL std::random_shuffle behavior fails with lrand48


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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