X-Recipient: archive-cygwin AT delorie DOT com
X-SWARE-Spam-Status: No, hits=-2.2 required=5.0	tests=AWL,BAYES_00,KHOP_THREADED,RCVD_IN_HOSTKARMA_NO,SPF_NEUTRAL,TW_NW,T_RP_MATCHES_RCVD
X-Spam-Check-By: sourceware.org
Message-ID: <4F89C6FC.9010602@cornell.edu>
Date: Sat, 14 Apr 2012 14:50:36 -0400
From: Ken Brown <kbrown AT cornell DOT edu>
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:10.0.1) Gecko/20120208 Thunderbird/10.0.1
MIME-Version: 1.0
To: cygwin AT cygwin DOT com
Subject: Re: gcc: turning off large-address awareness
References: <4F896504 DOT 3030006 AT cornell DOT edu>	<CA+sc5mnBXZ_+R9OKUX2idT_TBxE82U4ZfbOkcuWZgn9Y6TGxeA AT mail DOT gmail DOT com>	<4F89B215 DOT 9050903 AT cornell DOT edu>	<20120414173342 DOT GD15801 AT ednor DOT casa DOT cgf DOT cx> <CA+sc5mmg_pKy5HrR1csaGFPjV82ute3VRM9H04=ffhydKqfQWw AT mail DOT gmail DOT com>
In-Reply-To: <CA+sc5mmg_pKy5HrR1csaGFPjV82ute3VRM9H04=ffhydKqfQWw@mail.gmail.com>
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
X-PMX-CORNELL-SPAM-CHECKED: Pawpaw
X-Original-Sender: kbrown AT cornell DOT edu - Sat Apr 14 14:50:43 2012
X-PMX-CORNELL-REASON: CU_White_List_Override
X-IsSubscribed: yes
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

On 4/14/2012 1:52 PM, Earnie Boyd wrote:
> On Sat, Apr 14, 2012 at 1:33 PM, Christopher Faylor wrote:
>> On Sat, Apr 14, 2012 at 01:21:25PM -0400, Ken Brown wrote:
>>> On 4/14/2012 12:37 PM, Earnie Boyd wrote:
>>>> On Sat, Apr 14, 2012 at 7:52 AM, Ken Brown wrote:
>>>>> For testing purposes, I'd like to build without large-address awareness.
>>>>>    What's the right way to do that?  I tried
>>>>>
>>>>>     LDFLAGS=-Wl,--no-large-address-aware
>>>>>
>>>>> and
>>>>>
>>>>>     LDFLAGS=-Wl,--disable-large-address-aware
>>>>>
>>>>> but both resulted in "unrecognized option" errors from ld.
>>>>
>>>> You specify --large-address-aware if you want it and don't specify if
>>>> you don't want it.
>>>
>>> Sorry, I should have explained more clearly what the issue is.  Cygwin's
>>> gcc specifies --large-address-aware by default:
>>>
>>> $ gcc -dumpspecs | grep large
>>>    %{mwindows:--subsystem windows}   %{mconsole:--subsystem console}
>>> %{!mno-cygwin:%{!mno-use-libstdc-wrappers:   --wrap _Znwj   --wrap _Znaj
>>>    --wrap _ZdlPv   --wrap _ZdaPv   --wrap _ZnwjRKSt9nothrow_t   --wrap
>>> _ZnajRKSt9nothrow_t   --wrap _ZdlPvRKSt9nothrow_t   --wrap
>>> _ZdaPvRKSt9nothrow_t }}   %{shared: %{mdll: %eshared and mdll are not
>>> compatible}}   %{shared: --shared} %{mdll:--dll}   %{static:-Bstatic}
>>> %{!static:-Bdynamic}   %{shared|mdll: --enable-auto-image-base -e
>>> %{mno-cygwin:_DllMainCRTStartup AT 12}
>>> %{!mno-cygwin:__cygwin_dll_entry AT 12}}
>>> %{!mno-cygwin:--dll-search-prefix=cyg     %{!shared: %{!mdll:
>>> --large-address-aware --tsaware}}}
>>>
>>> I'm trying to override this default.
>>
>> You're right that there isn't a way to disable --large-address-aware
>> but, since it's part of the specs, I'm not sure what would take
>> precedence if there was a --disable* option.
>>
>> You could try using the above to create your own spec file and use
>> that on the command line for gcc, cumbersome as it is.
>
> Reading the specs snippet --large-address-aware is only used if
> -shared and -mdll have *not* been specified, i.e. you are building
> with -static specified.

No, you might just be building a .exe.

Ken


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