Merge branch 'backport-intel-fortran-preprocess' into release-3.19

Merge-request: !5826

Modules/Compiler/Intel-Fortran.cmake

@@ -13,7 +13,15 @@ set(CMAKE_Fortran_COMPILE_WITH_DEFINES 1)
 set(CMAKE_Fortran_CREATE_PREPROCESSED_SOURCE "<CMAKE_Fortran_COMPILER> <DEFINES> <INCLUDES> <FLAGS> -E <SOURCE> > <PREPROCESSED_SOURCE>")
 set(CMAKE_Fortran_CREATE_ASSEMBLY_SOURCE "<CMAKE_Fortran_COMPILER> <DEFINES> <INCLUDES> <FLAGS> -S <SOURCE> -o <ASSEMBLY_SOURCE>")
 
-set(CMAKE_Fortran_PREPROCESS_SOURCE
-  "<CMAKE_Fortran_COMPILER> -fpp <DEFINES> <INCLUDES> <FLAGS> -E <SOURCE> > <PREPROCESSED_SOURCE>")
+if(CMAKE_HOST_WIN32)
+  # MSVC-like
+  set(CMAKE_Fortran_PREPROCESS_SOURCE
+    "<CMAKE_Fortran_COMPILER> -fpp <DEFINES> <INCLUDES> <FLAGS> -P <SOURCE> -Fi<PREPROCESSED_SOURCE>")
+else()
+  # GNU-like
+  set(CMAKE_Fortran_PREPROCESS_SOURCE
+    "<CMAKE_Fortran_COMPILER> -fpp <DEFINES> <INCLUDES> <FLAGS> -P <SOURCE> -o <PREPROCESSED_SOURCE>")
+endif()
+
 set(CMAKE_Fortran_COMPILE_OPTIONS_PREPROCESS_ON "-fpp")
 set(CMAKE_Fortran_COMPILE_OPTIONS_PREPROCESS_OFF "-nofpp")