Fringe cmake can't find GDAL

[jlmaurer]

Building fringe using:
CXX=g++ cmake -DCMAKE_INSTALL_PREFIX=../install ../src/fringe
on "Ubuntu 18.04.4 LTS", where file structure is
Fringe
build
src
fringe
install

I get the following error message:

CMake Error at /usr/local/home/jlmd9g/software/minicondda3/envs/fringe/share/cmake-3.17/Modules/FindPackageHandleStandardArgs.cmake:164 (message):
Could NOT find GDAL: Found unsuitable version "2.2.3", but required is at
least "3.0" (found
/usr/local/home/jlmd9g/software/minicondda3/envs/fringe/lib/libgdal.so)
Call Stack (most recent call first):
/usr/local/home/jlmd9g/software/minicondda3/envs/fringe/share/cmake-3.17/Modules/FindPackageHandleStandardArgs.cmake:443 (_FPHSA_FAILURE_MESSAGE)
cmake/FindGDAL.cmake:287 (FIND_PACKAGE_HANDLE_STANDARD_ARGS)
CMakeLists.txt:32 (FIND_PACKAGE)

-- Configuring incomplete, errors occurred!
See also "/usr/local/home/jlmd9g/software/FRiNGE/build/CMakeFiles/CMakeOutput.log".

But:
gdal-config --prefix
/usr/local/home/jlmd9g/software/minicondda3/envs/fringe
gdal-config --version
3.0.4
gdal-config --cflags
-I/usr/local/home/jlmd9g/software/minicondda3/envs/fringe/include
gdal-config --libs
-L/usr/local/home/jlmd9g/software/minicondda3/envs/fringe/lib -lgdal

I've got GDAL_DIR and GDAL_ROOT specified to the same directory:
echo $GDAL_DIR
/usr/local/home/jlmd9g/software/minicondda3/envs/fringe//lib

in which is the .so files:
ls /usr/local/home/jlmd9g/software/minicondda3/envs/fringe//lib/libgdal*

/usr/local/home/jlmd9g/software/minicondda3/envs/fringe//lib/libgdal.a
/usr/local/home/jlmd9g/software/minicondda3/envs/fringe//lib/libgdal.so
/usr/local/home/jlmd9g/software/minicondda3/envs/fringe//lib/libgdal.so.26
/usr/local/home/jlmd9g/software/minicondda3/envs/fringe//lib/libgdal.so.26.0.4

Any ideas?

[piyushrpt]

What is the version number in

/usr/local/home/jlmd9g/software/minicondda3/envs/fringe/include/gdal_version.h

[piyushrpt]

I would also check the cmake config output - I suspect its loading gdal.h from a different location than the lib and reporting the mismatch.

[jlmaurer]

less /usr/local/home/jlmd9g/software/minicondda3/envs/fringe/include/gdal_version.h:
...
# define GDAL_RELEASE_NAME "3.0.4"
...
Based on this page, it looks like cmake may search the default path before searching the path at the environment variable, and since gdal exists at the default path location on my system, it takes that one first.

The relevant lines from FindGDAL.cmake:

197 find_path(GDAL_INCLUDE_DIR gdal.h
198   HINTS
199     ENV GDAL_DIR
200     ENV GDAL_ROOT
201   PATH_SUFFIXES
202      include/gdal
203      include/GDAL
204      include
205      )

If this is true, requiring cmake to look in the specified ENV instead of the default first should fix the problem.

[piyushrpt]

So

GDAL_DIR=/usr/local/home/jlmd9g/software/minicondda3/envs/fringe CXX=g++ cmake -DCMAKE_INSTALL_PREFIX=../install ../src/fringe

doesn't work? What shell are you using?

[jlmaurer]

Just as a follow-up, cmake is definitely using gdal at the default location:
grep '2.2.3' /usr/include/gdal/gdal_version.h
# define GDAL_RELEASE_NAME "2.2.3"

And yes, that command gives me the same error. Shell is bash.

[piyushrpt]

What version of cmake?
And are you clearing out the build folder before each cmake run? Else it will use the cached values

[jlmaurer]

That did it...

[jlmaurer]

It was using the cache. I'm feeling sheepish now. :)

[piyushrpt]

All is well .... these things are never documented :-P

[jlmaurer]

Thanks for the help! I'll push an update to the environment variable list at some point.

[jlmaurer]

If that is helpful!

[piyushrpt]

Go for it ..