c - libnfc cmake header file compilation error -

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am programming nfc using libnfc library in c language. using tdm-gcc mingw compiler , cmake open source build system installed following this tutorial building/compiling code. trying compile program includes/imports header file having source file. part of header file (card_objects.h) is:

#ifndef card_objects_h_ #define card_objects_h_ ... //other code  int setapplicationid(uint8_t *rapdu, char tag[], int currentpos); #endif

a part of source code file (card_objects.c) is:

#include "card_objects.h" ... //other code  int setapplicationid(uint8_t *rapdu, char tag[], int currentpos) {     ... //other code     return currentpos; }

both files in include_dir/ directory @ current path relative main file. have called header file in main program file follows:

#include "include_dir/card_objects.h"  ... //othercode  int main(int argc, const char *argv[]) {     .... //other code     currentpos = setapplicationid(rapdu, "application id (aid): ", currentpos);     ... //other code }

when try compile above program on computer, following error:

"... main_file.c:200: undefined reference 'setapplicationid'"

can figure out have done wrong? keep in mind have other header files no source files, variable definitions, being compiled no problem. header file-source file import , it's not working. see problem?

you cmakelists.txt file incorrect.

here original:

set(examples-sources   main_file   tests/test_progs )  include_directories(${cmake_current_source_dir}/../libnfc) include_directories(${cmake_current_source_dir}/include_dir) #this 2 files located  # examples foreach(source ${examples-sources})   set (targets ${source}.c)    if(win32)     set(rc_comment "${package_name} example")     set(rc_internal_name ${source})     set(rc_original_name ${source}.exe)     set(rc_file_type vft_app)     configure_file(${cmake_current_source_dir}/../contrib/win32/version.rc.in ${cmake_current_binary_dir}/../windows/${source}.rc @only)     list(append targets ${cmake_current_binary_dir}/../windows/${source}.rc)   endif(win32)    add_executable(${source} ${targets})   target_link_libraries(${source} nfc)   target_link_libraries(${source} nfcutils)   install(targets ${source} runtime destination bin component examples) endforeach(source)  #install required libraries if(win32)   include(installrequiredsystemlibraries)   configure_file(${cmake_source_dir}/cmake/fixbundle.cmake.in ${cmake_current_binary_dir}/fixbundle.cmake @only)   install(script ${cmake_current_binary_dir}/fixbundle.cmake) endif(win32)  if(not win32)   # manuals examples   file(glob manuals "${cmake_current_source_dir}/*.1")   install(files ${manuals} destination ${share_install_prefix}/man/man1 component manuals) endif(not win32)

in foreach(source ${examples-sources}) section create 2 targets, each 1 has single c file, end set( targets main_file.c ) in first iteration , set( targets tests/test_progs.c) on second iteration.

card_objects.c not referenced anywhere in cmakelists.txt file never built executable, hence undefined reference code isn't being built...

you should add cmake_minimum_required , project call cmakelists.txt file too.

perhaps example need use set( targets ${source}.c card_objects.c )


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