Here is a simple and portable deep learning C library libdeep by Bob Mottram.

To get a general feel of this library, lets try its xor example

E.g.

Simply run make or

`gcc -Wall -ansi -pedantic -o xor xor.c -ldeep -lm -fopenmp`

Run the executable for training the xor network

`./xor`

The data are as follows

After a few seconds it will finish the training with the following output

Loading data set
Number of training examples: 22
Number of labeled training examples: 22
Number of test examples: 6
Number of Inputs: 64
Training Completed
Test data set performance is 99.9%

And it will produce the xor networks both in C and Python:

C xor Network

Python xor Network

Testing the C Network

 ./export_xor zero zero
0.0055552125
 ./export_xor zero one
0.9918711185
 ./export_xor one zero
0.9939632416
 ./export_xor one one
0.0139884353