[petsc-users] how does the srand48/drand48 works in windows build PETSc-3.3?

[Yonghui]

I created a Solution (2 projects: Fortran and c) for PETSc-3.3 and spent 2
afternoon for building the library purely with MSVS 2010 and parallel studio
13. The library works OK with ex19 as a test. Adding PETSC_HAVE_RAND into
petscconf.h didn't solve my problem since srand48 and drand48 are not
replaced by rand. It seems PETSc just provides a wrapper for srand48 and no
algorithms depend on them. So I think it should be OK as long as I don't use
the wrapper. 
Thanks Satish's explanation but I can't reach the log (maybe not open to
public?). Could you attach it, Satish?

Yonghui

-----Original Message-----
From: petsc-users-bounces at mcs.anl.gov
[mailto:petsc-users-bounces at mcs.anl.gov] On Behalf Of Satish Balay
Sent: Tuesday, January 29, 2013 1:55 PM
To: PETSc users list
Subject: Re: [petsc-users] how does the srand48/drand48 works in windows
build PETSc-3.3?

cygwin is required primarily for the build tools. But compilation is done
directly with MS compiler/s [so no cygwin.dll is used]

wrt rand stuff - cl supports PETSC_HAVE_RAND. For eg: you can check all the
flags that get set for MS compiler/[Comapq DVF] at:

ftp://ftp.mcs.anl.gov/pub/petsc/nightlylogs/build_arch-mswin_ps3.log

Satish

On Tue, 29 Jan 2013, Yonghui wrote:

> Dear PETSc users,
> 
>  
> 
> I am start to use PETSc-3.3 and trying to build a Cygwin free windows 
> version (I just don't want to have Cygwin installed).
> 
> Thanks for the effort that the developers made for those macros 
> (PETSC_HAVE__FINITE, PETSC_HAVE__ISNAN, etc).
> 
>  
> 
> Here is a question: how does srand48/drand48 works in windows? Can I 
> replace them with other random number generator (that's the last 
> option since I am not sure whether they will be used in other 
> functions)? I don't see any equivalent definition in any headers in
windows so far.
> 
> There is a windows build tutorial but need Cygwin installed. Does that 
> mean I have to use srand48/drand48 provided by Cygwin (not sure but
maybe)?
> 
>  
> 
> I am using MSVS 2010+intel compiler+mpich.
> 
>  
> 
> Any comment will be appreciated.
> 
>  
> 
> Thanks,
> 
> Yonghui
> 
>