pluto: Respect FORTRAN cmake feature

Author: wdeconinck

pluto/src/CMakeLists.txt

@@ -105,11 +105,13 @@ ecbuild_add_library( TARGET pluto
 target_compile_features( pluto INTERFACE cxx_std_17 )
 target_compile_options( pluto PUBLIC $<$<COMPILE_LANGUAGE:CUDA>:--extended-lambda>)
 
+if (HAVE_FORTRAN)
+  ecbuild_add_library( TARGET pluto_f
+    SOURCES
+      pluto_f/pluto_module.F90
+      pluto_f/pluto_module.cc
+    PRIVATE_LIBS pluto
+    PUBLIC_INCLUDES $<BUILD_INTERFACE:${CMAKE_Fortran_MODULE_DIRECTORY}>
+  )
+endif()
 
-ecbuild_add_library( TARGET pluto_f
-  SOURCES
-    pluto_f/pluto_module.F90
-    pluto_f/pluto_module.cc
-  PRIVATE_LIBS pluto
-  PUBLIC_INCLUDES $<BUILD_INTERFACE:${CMAKE_Fortran_MODULE_DIRECTORY}>
-)