cmake - зависимости для сборки инструмента, как?

//cmakelists.txt
MACRO(ADD_HUI_FILES _sources )

    FOREACH (_current_FILE ${ARGN})
      GET_FILENAME_COMPONENT(_in ${_current_FILE} ABSOLUTE)
      GET_FILENAME_COMPONENT(_basename ${_current_FILE} NAME_WE)

      SET(_out ${CMAKE_CURRENT_BINARY_DIR}/${_basename}.c)

      ADD_CUSTOM_COMMAND(
         OUTPUT ${_out}
         COMMAND ${CMAKE_CURRENT_BINARY_DIR}/hui
         ARGS
         -o ${_out}
         -i ${_in}
         DEPENDS ${_in} ${CMAKE_CURRENT_BINARY_DIR}/hui
      )

      SET(${_sources} ${${_sources}} ${_out} )
   ENDFOREACH (_current_FILE)
ENDMACRO()

add_executable(hui hui.c)
set(source test.c)
add_hui_files(source t.hui)
add_executable(test ${source})

//hui.c
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int main(int argc, char ** argv)
{
        const char * in, * out;
        char buf[1024];
        size_t size;
        FILE * fin, *fout;
        int i;
        for (i = 0; i < argc; ++i)
        {
                if (!strcmp(argv[i], "-o"))
                {
                        out = argv[i + 1];
                } else if (!strcmp(argv[i], "-i")) {
                        in = argv[i + 1];
                }
        }

        fin  = fopen(in, "rb");
        fout = fopen(out, "wb");

        while ((size = fread(buf, 1, 1024, fin)))
        {
                fwrite(buf, 1, size, fout);
        }
        fclose(fin);
        fclose(fout);
}

//test.c
int main()
{
}

//t.hui
const char * jopa = 0;

add_custom_command(
        OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/hui.h ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/hui.bin
        MAIN_DEPENDENCY ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/hui-compiler
        DEPENDS source.hui
        COMMAND ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/hui-compiler source.hui
        COMMENT "Compiling bla-bla-bla"
)

CMake Error in hui/CMakeLists.txt:
  Cannot find source file "hui-compiler ".  Tried extensions .c .C .c++ .cc
  .cpp .cxx .m .M .mm .h .hh .h++ .hm .hpp .hxx .in .txx