Add CMake rules for functional-fortran

Author: milancurcic

CMakeLists.txt

@@ -17,6 +17,7 @@ include(FetchContent)
 include(cmake/options.cmake)
 include(cmake/compilers.cmake)
 
+include(cmake/functional.cmake)
 include(cmake/h5fortran.cmake)
 include(cmake/json.cmake)
 
@@ -62,7 +63,13 @@ add_library(neural
   src/nf/io/nf_io_hdf5.f90
   src/nf/io/nf_io_hdf5_submodule.f90
 )
-target_link_libraries(neural PRIVATE h5fortran::h5fortran HDF5::HDF5 jsonfortran::jsonfortran)
+
+target_link_libraries(neural PRIVATE
+  functional::functional
+  h5fortran::h5fortran
+  HDF5::HDF5
+  jsonfortran::jsonfortran
+)
 
 install(TARGETS neural)
 

cmake/functional.cmake

@@ -0,0 +1,18 @@
+FetchContent_Declare(functional
+  GIT_REPOSITORY https://github.com/wavebitscientific/functional-fortran
+  GIT_TAG 0.6.1
+  GIT_SHALLOW true
+)
+
+FetchContent_Populate(functional)
+
+add_library(functional ${functional_SOURCE_DIR}/src/functional.f90)
+target_include_directories(functional PUBLIC
+$<BUILD_INTERFACE:${CMAKE_BINARY_DIR}/include>
+$<INSTALL_INTERFACE:include>
+)
+
+add_library(functional::functional INTERFACE IMPORTED GLOBAL)
+target_link_libraries(functional::functional INTERFACE functional)
+
+install(TARGETS functional)