X-Spam-Check-By: sourceware.org
X-YMail-OSG: OJUOLlgVM1lp5vyN_tfftX3XvZuWahUO3.ZD0g_d7YGDeHaUtwnXccPl3GRUXgsJ2k2tb32.79euDXIxl6dBMpJ4HcvkcSQqth4N0oylMbtBRkti4ElFLA--
Message-ID: <45738F4A.2050306@aol.com>
Date: Sun, 03 Dec 2006 19:00:26 -0800
From: Tim Prince <n8tm AT aol DOT com>
Reply-To: tprince AT computer DOT org
User-Agent: Thunderbird 1.5.0.8 (Windows/20061025)
MIME-Version: 1.0
To: cygwin AT cygwin DOT com
Subject: Re: cygwin + make 10 time slower than equivalent linux make (same  ifc compiler)
References: <mn DOT 12c37d6cb7b95ded DOT 65710 AT esi-group DOT com> <3da3d8310612031012n1f605a54ufeb71fce542c2524 AT mail DOT gmail DOT com>
In-Reply-To: <3da3d8310612031012n1f605a54ufeb71fce542c2524@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Id: <cygwin.cygwin.com>
List-Subscribe: <mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive: <http://sourceware.org/ml/cygwin/>
List-Post: <mailto:cygwin AT cygwin DOT com>
List-Help: <mailto:cygwin-help AT cygwin DOT com>, <http://sourceware.org/ml/#faqs>
Sender: cygwin-owner AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
Delivered-To: mailing list cygwin AT cygwin DOT com

degeneracypressure AT gmail DOT com wrote:
> On 12/2/06, Philippe Conraux wrote:
>> I have to build a large project on Windows.
>>
>> Build libraries using Intel compilers needs 12 hours on cygwin
>> when same build needs 1 hour on Linux (same computer : dual boot, same
>> compilers ifc 9.1)
>
> Do you need a feature that is specific to cygwin's make or the cygwin
> environment?
>
Many of us require cygwin to support build environment using Intel or 
other commercial compilers.  However, there is no chance of getting any 
specific support for this, either from cygwin,  from Intel, or from the 
vendors of the other compilers.  Not to mention that Microsoft is 
unalterably opposed to this.
That said, cygwin often builds Windows applications much faster than 
they can be built under Visual Studio.  If you are using make -j on 
linux, why not on Windows?
> If not, could you use the make that comes with MinGW
> (http://www.mingw.org/)? If a POSIX-like environment is required,
> would MSYS do the trick as well (http://www.mingw.org/msys.shtml)?
>
> Alternatively, could you not simply cross-compile it for Windows on
> the Linux system? You said the workstation is dual-boot. If you have
> to be in Windows to perform other tasks while building it, perhaps you
> could virtualize (not emulate) some Linux system and cross-compile it
> that way.
No, commercial Windows compilers aren't generally available as a cross 
compiler on linux.  Nor do I think you will find anyone supporting a 
pre-built gcc cross compiler from linux for general Windows use (not 
that we shouldn't be grateful when that is available for cygwin).
>
> Finally, are you sure the problem even has anything to do with cygwin
> and cygwin's make?
Have you noticed how slow cygwin build and test scripts have been 
running with gcc in recent months?  I have a gcc testsuite running right 
now which is over 24 hours old.  It takes about 6 hours simply to build 
gcc, g++, gfortran on cygwin.  Even on my 4 year old Itanium linux 
system, it can be done several times faster than that.

--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Problem reports:       http://cygwin.com/problems.html
Documentation:         http://cygwin.com/docs.html
FAQ:                   http://cygwin.com/faq/