Thank you very much jack, very kind of you !
It wasn't directly radiance breaking my system.
Im running Ubuntu Gutsy.
At home I don't have problems, but in my laboratory I do.
According to someone who tried to help me, I was missing some libraries . And it was trying to install those library that I messed up too much with gcc components installing 'till my system broke.
I later spoke with a friend of mine, who is using Linux since more than me, and he told me that sometimes happen changing compilers version that programs don't run good anymore. My system actually deinstalled X11 and many basilar components. I tried reinstalling them later on to fix the problem, but no way to solve it fastly. In the meanwhile someone elses told me : why don't yuo use binaries? 
So, I preferred that very fast way ;o)
Anyway, if you wanna have a look, this is the first error reported.. but MANY MANY other are following..
" Making programs...
~/Scrivania/ray/src/common ~/Scrivania/ray/src
In directory common...
gcc -Dlinux -D_FILE_OFFSET_BITS=64 -Dfseeko=fseek -L/usr/X11R6/lib -I/usr/include/X11 -DNOSTEREO -O2 -c -o cone.o cone.c
In file included from rtio.h:9,
from standard.h:10,
from cone.c:10:
/usr/include/stdio.h:686: error: conflicting types for fseek
/usr/include/stdio.h:654: error: previous declaration of fseek was here
make: *** [cone.o] Error 1 "
If you patience to read this mail thank you and let me know, else thank you anyway and don't mind.
Lucio
.Hi Lucio,
.
.Compiling Radiance should not results in general operating system
.instabilities. It has nothing to do with the operation of the OS. I run
.a few different linux distributions, fedora core, ubuntu and caos. If
.you can tell me what compilation problems you ran into and what version
.of linux then I can try to offer some input.
.
.-Jack
.
···
[email protected] wrote:
.> Thank you very much Greg for explanation about HEAD.
.>
.> Luckily I'm linux user, but unluckily for head to be installed, if I read right, compiling is required.
.>
.> Compiling gives me much problems .. I tried to solve them (it seemed it was gcc problems) but the only result was that my system became very unstable and finally didn't even boot, so I had to reinstall the system and feel satisfied of binaries.. !
.>
.> Lucio
.>
.>
.> .Hi Lucio,
.> .
.> .The lamp color data also includes depreciation factors, which
.> .probably account for the 10% difference. I assume the "white" value
.> .is larger.
.> .
.> .A long-standing bug has been recently pointed out by Zack Rogers
.> .related to the orientation of full photometric distributions, and has
.> .been included in the latest HEAD available from radiance-online.org.
.> .A statement has also been added to clarify the assignment of the
.> .width (along y) and length (along x) axes.
.> .
.> .Hope this helps.
.> .-Greg
.> .
.> .> From: "loscotec\@libero\.it" <[email protected]>
.> .> Date: February 6, 2008 6:28:49 AM PST
.> .>
.> .> Hi everybody !
.> .>
.> .> I've got a problem I'm not sure how to deal with.
.> .>
.> .> I'm using a Disano light to simulate a tunnel lighting. It is a
.> .> fluorescent light.
.> .>
.> .> I converted it to radiance format from ies format (previously
.> .> translated from eulumdat format) using ies2rad with no specific
.> .> value. Then I calculated illuminance on road surface visualizing
.> .> isolux scheme.
.> .>
.> .> Then I converted the same light with the "-t white" option. And
.> .> calculated illuminance's isolux as before.
.> .>
.> .> The two isolux schemes are different, being value for the white
.> .> case almost 10 % bigger.
.> .>
.> .> Shouldn't them be equal?
.> .>
.> .> I tried simulating same case in dialux and calculux, and they do
.> .> report almost same values as the white case.
.> .>
.> .> What's wrong? Am I missing some knowledge / trick / anything?
.> .>
.> .> Lucio
.> .>
.> .> Ps : I also discovered some problems both in ies2tab and in
.> .> eulumcnv. The second, badly converting photometry (some dark
.> .> circles appear in the lighted scene as missing photometric values),
.> .> the first badly converting geometry (flipping x and y definitions).
.> .> But I have to check this things a little more.
.> .
.> ._______________________________________________
.> .Radiance-general mailing list
.> [email protected]
.> .http://www.radiance-online.org/mailman/listinfo/radiance-general
.> .
.>
.> .. Caminante no hay camino, solo se hace camino al andar ..
.>
.>
.> _______________________________________________
.> Radiance-general mailing list
.> [email protected]
.> http://www.radiance-online.org/mailman/listinfo/radiance-general
.>
.>
.
.--
.# Jack de Valpine
.# president
.#
.# visarc incorporated
.# http://www.visarc.com
.#
.# channeling technology for superior design and construction
.
.
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[email protected]
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.
.. Caminante no hay camino, solo se hace camino al andar ..
So, I preferred that very fast way ;o)