SunPro: Use -fpp to process all files

By using only -F, SunPro does not process files that don't have a .F or
.F90 extension. This means that the preprocess rules don't quite work as
expected, for instance breaking the Ninja generator's behavior during
cmake_ninja_depends.

Modules/Compiler/SunPro-Fortran.cmake

@@ -19,7 +19,7 @@ set(CMAKE_Fortran_MODDIR_FLAG "-moddir=")
 set(CMAKE_Fortran_MODPATH_FLAG "-M")
 
 set(CMAKE_Fortran_PREPROCESS_SOURCE
-  "<CMAKE_Fortran_COMPILER> <DEFINES> <INCLUDES> <FLAGS> -F <SOURCE> -o <PREPROCESSED_SOURCE>")
+  "<CMAKE_Fortran_COMPILER> <DEFINES> <INCLUDES> <FLAGS> -F -fpp <SOURCE> -o <PREPROCESSED_SOURCE>")
 
-set(CMAKE_Fortran_CREATE_PREPROCESSED_SOURCE "<CMAKE_Fortran_COMPILER> <DEFINES> <INCLUDES> <FLAGS> -F <SOURCE> -o <PREPROCESSED_SOURCE>")
+set(CMAKE_Fortran_CREATE_PREPROCESSED_SOURCE "<CMAKE_Fortran_COMPILER> <DEFINES> <INCLUDES> <FLAGS> -F -fpp <SOURCE> -o <PREPROCESSED_SOURCE>")
 set(CMAKE_Fortran_CREATE_ASSEMBLY_SOURCE "<CMAKE_Fortran_COMPILER> <DEFINES> <INCLUDES> <FLAGS> -S <SOURCE> -o <ASSEMBLY_SOURCE>")