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Re: old install instructions? -mnomingw being removed?


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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