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DSPLIB FFT EXAMPLE BULDING ERROR

Hello everyone

I am beginner of CCS. I use CCS 5.5.0.000077. So I started to use DSPLIB to get started. However, when I use one of example from DSPLIB 3.1.1.1--DSP_fft32*32s_66_le_elf, there is two warning coming up.

for the line 281 in DSP_fft32*32s_d.c:  gen_twiddle_fft32x32s(&w[0][PAD], j, 2147483647.5);

for the line 292 in DSP_fft32*32s_d.c: memset(y_cn, 0xA5, sizeof(y_cn));

It said: function declared implicitly.

However, for the function "gen_twiddle_fft32x32s", I can locate its declaration by right clicking mouse and selected "open declaration".

For the function"memset", I can see the "string.h" is included in the project. A interesting thing is just two lines above memset function. This example use memcpy function, but it shows nothing warming. I think memcpy and memset are from the same string.h.

At last, although there are two warnings, I can debug the program.

Thank You in advance!