I did this successfully again today on a fresh install. For ECW the following method has worked for me:<br><br>
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<ol><ol><ol><li>open terminal<br></li><li><p style="margin-bottom: 0cm">sudo wget
<a href="http://de-mirror.org/distro/gentoo/distfiles/libecwj2-3.3-2006-09-06.zip">http://de-mirror.org/distro/gentoo/distfiles/libecwj2-3.3-2006-09-06.zip</a></p></li><li><p style="margin-bottom: 0cm">unzip
libecwj2-3.3-2006-09-06.zip</p>
</li><li><p style="margin-bottom: 0cm">cd libecwj2-3.3</p>
</li><li><p style="margin-bottom: 0cm">./configure</p>
</li><li><p style="margin-bottom: 0cm">make</p>
</li><li><p style="margin-bottom: 0cm">sudo make install</p>
</li><li><p style="margin-bottom: 0cm;">sudo gdal-ecw-build /usr/local/ (This step may differ depending on your file system)<br></p></li><li><p style="margin-bottom: 0cm">sudo ldconfig</p>
</li><li><p style="margin-bottom: 0cm;">gdalinfo –formats | grep -i
ecw</p></li></ol></ol></ol>Make sure in the last step the output shows. If it does not, the install failed.<br><br>I still have yet to successfully incorporate MrSID support. If you manage it, please let me know.<br>
<br><br><div class="gmail_quote">On Mon, Jul 4, 2011 at 6:25 AM, Giovanni Manghi <span dir="ltr"><<a href="mailto:giovanni.manghi@gmail.com">giovanni.manghi@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
you need the SDKs from erdas and lizardtech<br>
<br>
cheers<br>
<font color="#888888"><br>
-- Giovanni --<br>
</font><div class="im"><br>
On Mon, 2011-07-04 at 18:24 +0800, ahmad jauhari wrote:<br>
> dear all,<br>
><br>
> i have installed gdal-ecw-src and gdal-mrsid-src, but qgis program can<br>
> not access the file .ecw and file mrSID, anyone can help me. thanks.<br>
<br>
</div><div><div></div><div class="h5">_______________________________________________<br>
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</div></div></blockquote></div><br><br clear="all"><br>-- <br><div>all the best,</div>
<div>Lee</div><br>