[gdal-dev] Fw: Building GDAL with ECW support

[Markus Neteler]

On Thu, Feb 4, 2021 at 9:01 PM <pteroglossus at pm.me> wrote:
...
> As for installing GRASS GIS, I suspected it wouldn't be as easy as a normal apt-get install...

It is as easy as that but in your "special" case you do not want to
default GDAL.

> Thanks Markus for your input, I read the Quick_instructions for Ubuntu 20.04, and it seems doable. One question though, I won't install GDAL as a prerequisite as instructed because I've compiled it myself, right?

That's right.

> Therefore, I'm gonna need to tell the compiler to get GDAL from the folder it's been installed in.

Well, if you installed GDAL with "make install" it should be there
(ok, probably in /usr/local/bin/ and not /usr/lib/).

> The only reference to GDAL in the guide, apart from the prerequisite install is:
>
> # "configure" source code for local machine (checks for CPU type etc):
> MYCFLAGS='-O2 -fPIC -fno-common -fexceptions -std=gnu99 -fstack-protector -m64'
> #MYCXXFLAGS=''
> MYLDFLAGS='-Wl,--no-undefined -Wl,-z,now'
>
> LDFLAGS="$MYLDFLAGS" CFLAGS="$MYCFLAGS" CXXFLAGS="$MYCXXFLAGS" ./configure \
>   --with-cxx \
>   --enable-largefile \
>   --with-proj --with-proj-share=/usr/share/proj \
>   --with-gdal=/usr/bin/gdal-config \
>
> I happen to have a "gdal-config" in /usr/bin/ but it must be a remnant of a previous install because the creation date is March 29th 2020. Should I change the argument to
> "--with-gdal=/home/k/bin/gdal/gdal-3.1.4/bin/gdal-config" which is the location of the one I compiled?

Yes, that should work.

Best,
Markus