Re: [Flightgear-devel] Cygwin Installation problem

Thomas Biwer Thu, 19 Oct 2006 02:45:04 -0700

Well, there came another idea into my mind: During the installation of SimGear I was struggling with the problem of function isnan being undeclared in cloud.cxx and cloudfield.cxx and after some research in the mailing list´s archive, i found that this problem once had lead to an endless loop and therefore caused a hang starting FG on an macOS. ( http://mail.flightgear.org/pipermail/flightgear-devel/2005-February/035004.html)

so the problem seems to be that isnan is not declared. i m really out of ideas how to deal with that since i already tried a couple of things, namely these suggestions given over here: http://mail.flightgear.org/pipermail/flightgear-devel/2004-May/028391.html

NOTE: i m using cygwin, not msys, on a pentium 4 using windowsXP. here´s what i get when i try to compile:

make[4]: Entering directory `/home/biwert/SimGear-CVS/simgear/scene/sky'
if g++ -DHAVE_CONFIG_H -I. -I. -I../../../simgear -I../../.. -I/fg-0.9.10/inclu
de -g -O2 -D_REENTRANT -MT cloud.o -MD -MP -MF ".deps/cloud.Tpo" -c -o cloud.o
cloud.cxx; \
        then mv -f ".deps/cloud.Tpo" ".deps/cloud.Po"; else rm -f ".deps/cloud.T
po"; exit 1; fi
cloud.cxx: In member function `bool SGCloudLayer::reposition(float*, float*,
   double, double, double, double)':
cloud.cxx:728: error: `isnan' undeclared (first use this function)
cloud.cxx:728: error: (Each undeclared identifier is reported only once for
   each function it appears in.)
make[4]: *** [cloud.o] Error 1
make[4]: Leaving directory `/home/biwert/SimGear-CVS/simgear/scene/sky'
make[3]: *** [all-recursive] Error 1
make[3]: Leaving directory `/home/biwert/SimGear-CVS/simgear/scene'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/home/biwert/SimGear-CVS/simgear'
make[1]: *** [all] Error 2
make[1]: Leaving directory `/home/biwert/SimGear-CVS/simgear'
make: *** [all-recursive] Error 1

I can make it compile cleanly by adding

inline int (isnan)(double r) { return isnan(r); }

to clouds.cxx and cloudfields.cxx but I think this then causes the hang while starting FlightGear, so i would like to avoid this hack.

any suggestions about what to do?

Best,

Thomas

2006/10/10, Vivian Meazza <[EMAIL PROTECTED]>:

Thomas Biwer

That was a long time ago! The problem then was within some SimGear code, however that was resolved. AKAIK, 0.9.10 compiles OK under Cygwin, but I haven't tried it for ages, since I use the CVS version.

Seems possible that you have:

the wrong version of SimGear
the wrong version of the data.

If neither of these are the case, then I'm right out of ideas for now.

Vivian

Hello there,

I compiled FlightGear 0.9.10 on this machine over here using Windows XP and Cygwin and it did properly without showing errors or warnings. When trying to run it for the first time using the cygwin console it starts first but then hangs up at "installing scenery objects". I started it again with using --log-level=debug and the last thing it seems to do is "generating ocean tile" (when path to scenery is specified bz --fg-scenery=/...) or "generating lights" (when scenery path stays unspecified).

I think Vivian Meazza described a similar problem over here: http://mail.flightgear.org/pipermail/flightgear-devel/2005-August/038846.html

Hardware problems seem unlikely since FG worked properly on the same machine when installed over the installing file downloaded from flightgear.org.

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Re: [Flightgear-devel] Cygwin Installation problem

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