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Re: gcc: turning off large-address awareness

On 4/14/2012 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




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:--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.

That works, thanks. I didn't know about spec files.


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