Remove unnecessary compile definitions

[tpadioleau]

Removed:

• target_compile_definitions(DDC INTERFACE "DDC_BUILD_KERNELS_FFT")
• target_compile_definitions(DDC INTERFACE "DDC_BUILD_KERNELS_SPLINES")
• target_compile_definitions(PDI_Wrapper INTERFACE "DDC_BUILD_PDI_WRAPPER")

target_compile_definitions(DDC INTERFACE DDC_BUILD_DOUBLE_PRECISION) is replaced by a config.hpp.in file.

DDC public headers

• <ddc/ddc.hpp> available using cmake target DDC::DDC
• <ddc/kernels/fft.hpp> available using cmake target DDC::DDC if cmake option DDC_BUILD_KERNELS_FFT=ON
• <ddc/kernels/splines.hpp> available using cmake target DDC::DDC if cmake option DDC_BUILD_KERNELS_SPLINES=ON
• <ddc/pdi.hpp> available using cmake target DDC::PDI_Wrapper if cmake option DDC_BUILD_PDI_WRAPPER=ON

[tpadioleau]

Internally to DDC, one has to include this file when the preprocessor macros are used to avoid any surprise

[yasahi-hpc]

Looks good. Regarding examples, do you need PDI enabled versions for all examples? Since it is an advanced usage, I think one example is sufficient. Making other examples as simple as possible without PDIs would help beginners.

[tpadioleau]

Looks good.

thanks!

Regarding examples, do you need PDI enabled versions for all examples? Since it is an advanced usage, I think one example is sufficient. Making other examples as simple as possible without PDIs would help beginners.

Need, no. It was introduced to be sure we compile the PDI related classes. I don't know yet how to write PDI tests.