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Subject: Re: Attempting to build cygwin1.dll
To: Cygwin mailing list <cygwin AT cygwin DOT com>
References: <bc4cc28f-6ddb-d60a-1c5c-faa623bc6a9b AT frontier DOT com> <a6207748-79bc-36ad-1885-2b6b04340b35 AT cygwin DOT com>
From: Nirgendsdorf <nirgendsdorf AT frontier DOT com>
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Date: Tue, 30 Aug 2016 00:34:21 -0700
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On Tue, 30 Aug 2016 01:04:23 -0500, Yaakov Selkowitz wrote:
> On 2016-08-29 21:21, Nirgendsdorf wrote:
>> I am sure I have all the support libraries for the 32-bit mingw
>> gcc installed and working (I've built software with it). Does this
>> mean a 64-bit machine is required to build the Cygwin DLL?
>
> No; the mingw64 cross-compiler is required for building
> cyglsa64.dll.

Thank you, Yaakov. The nomenclature that has developed for the 32-bit 
and 64-bit builds of the mingw toolchain can be confusing to say the 
least, so I have to ask which "mingw64" cross-compiler you are talking 
about? mingw64-i686 (which I suppose is the 32-bit version), or 
mingw64-x86_64?

In any case, there seems to be no configure options allowing the user to 
choose which newlib-cygwin components to build. lsaauth becomes an issue 
only because it stops the scripts before cygwin1.dll is built. I may be 
wrong, but I think that libm and the Cygwin dll are the only two 
components of the package that will give me a significant performance 
gain if I can build them architecturally specific with `gcc 
-march=native -mfpmath=sse.' I am not sophisticated enough to rewrite 
the scripts, nor to build cygwin1.dll manually as described in the 
article I mentioned. I would sure appreciate it if there were some means 
within my abilities to build it.

Jeff

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