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Date:	Sat, 14 Apr 2012 13:33:42 -0400
From:	Christopher Faylor <cgf-use-the-mailinglist-please AT cygwin DOT com>
To:	cygwin AT cygwin DOT com
Subject:	Re: gcc: turning off large-address awareness
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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.

cgf

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