unresolved symbols remain: linking codec server example (codec_engine) with DSPLIB

Hello!

I tried to modify a codec implementation i.e. sphdec1_copy to have FFT implementation in it (I want to get the spectrum of the speech data).

I have included the "gen_twiddle_fft16x16.h" inside the "phdec1_copy.c" and call the gen_twiddle_fft16x16(w_16x16, N); inside the "SPHDEC1COPY_TI_process" function. It compiles OK to produce the lib i.e. "sphdec1_copy.a64P".

The next step is to build the server. I tried to rebuild the all_codecs codec engine server. I found inside the package/cfg/bin/ti_platforms_evm3530/all_x64P.xdl -- the server will link to the sphdec1_copy.a64 that I've just built, it is confirmed by following lines inside the all_x64P: "-l"/home/dio/sandbox/dsp/ti/codec_engine_2_24/examples/ti/xdais/dm/examples/sphdec1_copy/lib/sphdec1_copy.a64P"

Then I type make -- and at the linking process, i.e.

# lnk64P bin/ti_platforms_evm3530/all.x64P ...

rm -f package/cfg//bin/ti_platforms_evm3530/all.x64P.map

/home/dio/sandbox/dsp/ti/cg6x_6_1_10/bin/lnk6x -w -q -u _c_int00 -l link.cmd -q -o bin/ti_platforms_evm3530/all.x64P package/cfg/bin/ti_platforms_evm3530/all_x64Pcfg_c.o64P package/cfg/bin/ti_platforms_evm3530/all/main.o64P package/cfg/bin/ti_platforms_evm3530/all_x64Pcfg.o64P package/cfg/bin/ti_platforms_evm3530/all_x64P.o64P  package/cfg/bin/ti_platforms_evm3530/all_x64P.xdl  -c -m package/cfg//bin/ti_platforms_evm3530/all.x64P.map -l /home/dio/sandbox/dsp/ti/cg6x_6_1_10/lib/rts64plus.lib -l /home/dio/sandbox/dsp/C64x+DSPLIB/dsplib_v210/dsplib64plus.lib

I've got this error:

undefined             first referenced                                                                                                              

  symbol                   in file                                                                                                                   

 ---------             ----------------                                                                                                              

 _gen_twiddle_fft16x16 /home/dio/sandbox/dsp/ti/codec_engine_2_24/examples/ti/xdais/dm/examples/sphdec1_copy/lib/sphdec1_copy.a64P<sphdec1_copy.o64P>

error: unresolved symbols remain

error: errors encountered during linking; "bin/ti_platforms_evm3530/all.x64P"

   not built