netcdf-c/docs/cmake_faq.md

CMake-Related Frequently-Asked-Questions (FAQ)

Below are a list of commonly-asked questions regarding NetCDF and CMake.

How can I see the options available to CMake?

    $ cmake [path to source tree] -L	- This will show the basic options.
    $ cmake [path to source tree] -LA	- This will show the basic and advanced options.

How do I specify how to build a shared or static library?

This is controlled with the internal `cmake` option, `BUILD_SHARED_LIBS`.

    $ cmake [Source Directory] -DBUILD_SHARED_LIBS=[ON/OFF]

Can I build both shared and static libraries at the same time with cmake?

Not at this time; it is required to instead build first one version, and then the other, if you need both.

How can I specify linking against a particular library?

It depends on the library.  To specify a custom `ZLib`, for example, you would do the following:
	
    $ cmake [Source Directory] -DZLIB_LIBRARY=/path/to/my/zlib.lib
    

`HDF5` is more complex, since it requires both the `hdf5` and `hdf5_hl` libraries. You would specify custom `HDF5` libraries as follows:
	
    $ cmake [Source Directory] -DHDF5_LIB=/path/to/hdf5.lib \
        -DHDF5_HL_LIB=/path/to/hdf5_hl.lib \
        -DHDF5_INCLUDE_DIR=/path/to/hdf5/include


Alternatively, you may specify:
	
    $ cmake [Source Directory] \
        -DHDF5_LIBRARIES="/path/to/hdf5.lib;/path/to/hdf5_hl.lib" \
        -DHDF5_INCLUDE_DIRS=/path/to/hdf5/include/

What if I want to link against multiple libraries in a non-standard location?

You can specify the path to search when looking for dependencies and header files using the `CMAKE_PREFIX_PATH` variable:

• Windows:

    $ cmake [Source Directory] -DCMAKE_PREFIX_PATH=c:\shared\libs\
  

• Linux/Unix/OSX:

    $ cmake [Source Directory] -DCMAKE_PREFIX_PATH=/usr/custom_library_locations/		
  

How can I specify a Parallel Build using HDF5

If cmake is having problems finding the parallel `HDF5` install, you can specify the location manually:


    $ cmake [Source Directory] -DENABLE_PARALLEL=ON \
        -DHDF5_LIB=/usr/lib64/openmpi/lib/libhdf5.so \
        -DHDF5_HL_LIB=/usr/lib64/openmpi/lib/libhdf5.hl.so \
        -DHDF5_INCLUDE_DIR=/usr/include/openmpi-x86_64 \
	

You will, of course, need to use the location of the libraries specific to your development environment.