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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I am moving my windows application which is uses GDAL
(1.4.2) from an MSVC7.1 to an MSVC8.1 (Visual Studio Express) build
environment. I have been recompiling most of my support libraries including
GDAL using VC8.1 to avoid c runtime version conflicts. This has given me a
problem when trying to rebuild GDAL with ECW support. I was using a
binary version of the ECW_SDK (3.3) which I downloaded some time ago. This
contains the old form of the ECW EULA (the one that refers to there being three
versions of the licence), this covered the use I wanted to make of it.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I tried to link to the static library version of ECW and
override the crt versions it was requesting (a fairly standard thing to do),
however I cannot get this to work. Whatever linker commands I try I seem to end
up with conflicts and unresolved symbols. I then tried to link the ECW library
as a DLL and live with the possibility of run time conflicts; however I still
ran in to issues with symbol conflicts and unresolved symbols.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>My next step was to rebuild the ECW library from source.
This meant I had to download the latest version from ERMapper (now Leica).
Unfortunately this comes with a new a version of the EULA which forbids any
commercial use and directs you to contact ERMapper to negotiate a licence. This
is not practical for us at this time.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Looking at the original licence text it seems to me that it
allows source code redistribution. So my first question is can anyone supply me
with or point me at a copy of the ECW_SDK 3.3 source code with the original
licence.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>My next question is. Has anyone succeeded in making a Visual
Studio Express (VC8.1) version of GDAL using the ECW_SDK in binary or source
form under the old licence terms in a way that is legal.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I am also interested in any comments on what this new
licensing stance means for the future of ECW support in GDAL. I can see there
has been debate in the past on ECW licensing on the list, but the situation
appears to have changed.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>For information I am only interested in using the sdk for
decompression.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Roger<o:p></o:p></span></font></p>
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