[Coin-ipopt] Compiling an AMPL executable using Cygwin

Andreas Waechter andreasw at watson.ibm.com
Mon Sep 16 19:12:46 EDT 2002


Summarizing our off-line discussion, we have established that your
compilation problem regarding the null definitions of 'LIB' etc is
probably due to the fact, that on your system those variables have been
defined in the system environment, so that Makefile.trgs sees those values
from the environment, instead of an empty string, and causes the hickup.

I have added null definitions for the two makefile variables in question
at the end of Makefile.defs.  Again, the change is already submitted to
the COIN CVS repository, that you can access at


( Click your way through to COIN/Ipopt/SOURCES/Makefiles )

Tomorrow's tarball with reflect those updates as well.

I hope this rectifies the problems you encountered today.  Please let me
know if you still have trouble compiling under CygWin.

Many thanks,


On Mon, 16 Sep 2002, Arvind Uppili Raghunathan wrote:

> Hi Andreas,
> > called 'gmake'.  You can either change this in your Makefile.defs, or you
> > can add a link such as (for Cygwin)
> >
> > cd /usr/local/bin
> > ln -s /usr/bin/make.exe gmake.exe
>   The version of the make utility I have downloaded is 3.79.1 The
> downloaded make is indeed the GNU make (info from man pages) but for some
> reason seems to be complaining about undefined variables. Hope this helps.
> Also, I use Windows 2000. Not sure if this is of any significance to the
> observed behavior.
> Cheers
> Arvind
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