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Date:	Sat, 02 Jan 2010 10:05:04 +0800
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Subject:	Re: old install instructions? -mnomingw being removed?
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On 1/2/2010 07:52, Ken Tilton wrote:
> Sorry, I am a complete noob to all this make/install/gcc stuff, I am just trying
> to make a fresh build of a DLL I have used for years to see if it resolves a
> problem.
>
> I installed cygwin 1.7.1 today on a windows 7 laptop.
>
> The directions for my library are great:
>
> "VER=8.4.12
> SRCDIR=`pwd`
>
> cd $SRCDIR/tcl$VER/win
> env 'CC=gcc -mno-cygwin' ./configure --enable-threads
> make libtclstub84.a
>
> cd $SRCDIR/tk$VER/win
> env 'CC=gcc -mno-cygwin' ./configure --enable-threads
> make libtkstub84.a
>
> cd $SRCDIR/Togl
> env 'CC=gcc -mno-cygwin' ./configure --with-tcl=../tcl$VER/win --with-
> tk=../tk$VER/win
>
> make"
>
> That's from doc for the lib which is Togl, an OpenGL add-on widget to Tcl/Tk.
> Unfortunately the mailing list does not seem active, because:
>
> The first env command responds "C compiler cannot create executables" and refers
> me to the config.log. That has a few lines showing the -mno-cygwin flag has been
> removed and telling me to use a mingw-targeted cross-compiler.
>
> Not sure if those are warnings or that is why later what looks to be a hello-
> world-like little C compile reports failure leading next to the "cannot create
> exes" message.
>
> Googling did turn up a long-ago discussion mentioning deprecating no-mingw (and
> to my relief that this is not something poor know-nothings like me should
> encounter) but the obvious solution ("a mingw-targeted cross-compiler") did not
> work out two ways:
>
> 1. Just googling that did not cause anything to jump out at me.
> 2. I am wondering if this is a cross-compiler situaton, since I am on Windows
> trying to build a windows DLL.
>
> Any clues greatly appreciated!
>
> kt
>

Hi,

The -mno-cygwin option has been removed from gcc4.

If you need it, install the gcc-mingw package via the Cygwin setup, and
use CC="gcc-3 -mno-cygwin" instead. It is an older version of GCC, but
it will get you somewhere.

Yes, it is a cross-compile situation. MinGW and Cygwin are considered
different hosts even if both are running on Windows. Cygwin programs
use cygwin1.dll while MinGW programs use msvcrt.dll.

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