[emmakateh]

I am using the x64 Native tools Command Prompt for VS 2017 to build my UDF Library (chapter 5 in the udf manual) I have setup the user_nt.udf in this way:

CSOURCES = $(SRC)magneticfield_w_externalcalcs.c
HSOURCES = $(SRC)header_external_calcs.h
VERSION = 3ddp_node
PARALLEL_NODE = smpi

# Do not change the following line unless externally precompiled objects
# are to be included at the linking stage.
# For example: USER_OBJECTS = my_fortran_funcs.obj

USER_OBJECTS = external_calcs.obj


I put the magneticfield_w_externalcalcs.c and header_external_calcs.h in the ..\..\src folder but when I execute the makefile i get this error:

cl : Command line warning D9024 : unrecognized source file type '..\..\src\header_external_calcs.h', object file assumed
cl : Command line warning D9027 : source file '..\..\src\header_external_calcs.h' ignored

I am not sure why the makefile is ignoring the header but if anyone can help, please let me know!