CMAKE not building shared object files

[Marston]

It is not building the so files with the call:
cmake -DCMAKE_INSTALL_PREFIX=$CONDA_PREFIX -DCMAKE_PREFIX_PATH=$CONDA_PREFIX -DBUILD_SHARED_LIBS=ON ..

How did I build ip with so files?

[EricEngle-NOAA]

The following is related to this issue...

I have been playing around with this and from what I can tell is the order in which you install SP is important vs the IP library type you want to build. Here is a scenario that fails with latest versions of each library:

• build SP (shared, then static)
• build IP with shared....THIS FAILS

Because the SP build and install of static after shared, overwrote the cmake config files for SP shared. So CMake basically has no recollection of SP being build with shared library and therefore IP points to the SP static lib .a file.

[EricEngle-NOAA]

From further investigation, it seems linking to a shared object dependent library when building a static library is not an issue. For example, if you build SP with a shared object library, but then build IP as a static library, all tests pass.

[AlexanderRichert-NOAA]

@Marston is this still an issue? The only caveat to building shared ip using static sp is that sp will need to be built with PIC enabled (-DCMAKE_POSITION_INDEPENDENT_CODE=ON).

[EricEngle-NOAA]

FWIW, it was having this issue back then, but not anymore. I should also note here that we are maintaining NCEPLIBS g2c, ip, and sp on conda-forge.

https://anaconda.org/conda-forge/nceplibs-g2c
https://anaconda.org/conda-forge/nceplibs-ip
https://anaconda.org/conda-forge/nceplibs-sp

[Marston]

@AlexanderRichert-NOAA Not anymore. I was able to get it compiled but I am still waiting on @EricEngle-NOAA to give some guidance on encoding grib2 with grib2io, in particular, what fields are adjustable.