how to link the c code functions during code generation

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vinod naidu 2016-6-9

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https://ww2.mathworks.cn/matlabcentral/answers/288773-how-to-link-the-c-code-functions-during-code-generation

编辑： vinod naidu 2016-6-10

hi every one , my project is finding the peaks of the audio signals in frequency domain at certain threshold I have used CWTFT then i got the result and i can find out the peaks of my audio signals ,

now i got stuck at code conversion for supporting hardware package arduino uno, The few code lines from my programm

for example

s=[50:0.05:68];    scales  selection  
f0=scal2frq(s,'morl',dt);  % function convert the corresponding scales to freq's 
scales = helperCWTTimeFreqVector(15000,22050,f0,dt,32);

when I am trying to convert matlab code to c code error shows floor & ceil not supported for code gen floor & ceil are from below mat fun at minscale maxscale

function scales = helperCWTTimeFreqVector(minfreq,maxfreq,f0,dt,NumVoices)
a0 = 2^(1/NumVoices);
minscale = f0/(maxfreq*dt);
maxscale = f0/(minfreq*dt);
minscale = floor(NumVoices*log2(minscale));
maxscale = ceil(NumVoices*log2(maxscale));
scales = a0.^(minscale:maxscale).*dt;

as i know floor and ceil are used to rounds the nearest values, when i searched i got implemented c files for floor and ceil , how would i link these c files during code generation