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POUndefined references in building code from IPOL with libpng
 

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  1. POUndefined references in building code from IPOL with libpng
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    <p>I am trying to compile the code which is available online <a href="http://www.ipol.im/pub/art/2011/bcm_nlm/" rel="nofollow">Non-Local Means Denoising</a></p> <p>When I compile the source, the following errors appear that I suppose are mainly due to <code>libpng</code>:</p> <pre><code> g++ -L/opt/local/lib/ -L/usr/local/lib/ -L/usr/lib/x86_64-linux-gnu/ -fopenmp -lpng -o nlmeans_ipol nlmeans_ipol.o io_png.o libauxiliar.o libdenoising.o mt19937ar.o io_png.o: In function `io_png_write_raw': io_png.c:(.text+0xe0): undefined reference to `png_create_write_struct' io_png.c:(.text+0xf6): undefined reference to `png_create_info_struct' io_png.c:(.text+0x12b): undefined reference to `png_init_io' io_png.c:(.text+0x194): undefined reference to `png_set_IHDR' io_png.c:(.text+0x1a6): undefined reference to `png_write_info' io_png.c:(.text+0xb36): undefined reference to `png_write_image' io_png.c:(.text+0xb48): undefined reference to `png_write_end' io_png.c:(.text+0xb62): undefined reference to `png_destroy_write_struct' io_png.c:(.text+0xbcc): undefined reference to `png_destroy_write_struct' io_png.c:(.text+0xc1f): undefined reference to `png_destroy_read_struct' io_png.c:(.text+0xe6a): undefined reference to `png_destroy_write_struct' io_png.c:(.text+0xe80): undefined reference to `png_destroy_write_struct' </code></pre> <p>I have followed the following threads and placed the file "libpng.a" at many locations but it does not help.</p> <p>I have seen a similar <a href="http://sourceforge.net/p/pngwriter/discussion/237442/thread/6e394eca/" rel="nofollow">libpng problem here</a> but does not help.</p> <p>I am using ubuntu 12.04.</p> <p>Could anyone please tell what could actually go wrong?</p> <p><strong>EDIT 1</strong> The complete call is as follows</p> <pre><code> g++ -O3 -funroll-loops -fomit-frame-pointer -fno-tree-pre -falign-loops -ffast-math -ftree-vectorize -Wall -Wextra -Wno-write-strings -Wno-deprecated -ansi -fopenmp -c -o nlmeans_ipol.o nlmeans_ipol.cpp cc -c -o io_png.o io_png.c -O3 -funroll-loops -fomit-frame-pointer -fno-tree-pre -falign-loops -ffast-math -ftree-vectorize -Wall -Wextra -Wno-write-strings -ansi -I/opt/local/include/ -I/usr/local/include/ g++ -c -o libauxiliar.o libauxiliar.cpp -O3 -funroll-loops -fomit-frame-pointer -fno-tree-pre -falign-loops -ffast-math -ftree-vectorize -Wall -Wextra -Wno-write-strings -Wno-deprecated -ansi -fopenmp -I/opt/local/include/ -I/usr/local/include/ g++ -c -o libdenoising.o libdenoising.cpp -O3 -funroll-loops -fomit-frame-pointer -fno-tree-pre -falign-loops -ffast-math -ftree-vectorize -Wall -Wextra -Wno-write-strings -Wno-deprecated -ansi -fopenmp -I/opt/local/include/ -I/usr/local/include/ cc -c -o mt19937ar.o mt19937ar.c -O3 -funroll-loops -fomit-frame-pointer -fno-tree-pre -falign-loops -ffast-math -ftree-vectorize -Wall -Wextra -Wno-write-strings -ansi -I/opt/local/include/ -I/usr/local/include/ g++ -lpng -lm -fopenmp -L/opt/local/lib/ -L/usr/local/lib/ -L/usr/lib/ -L/usr/lib/x86_64-linux-gnu/ -fopenmp -lpng -lpngwriter -lz -lfreetype -o nlmeans_ipol nlmeans_ipol.o io_png.o libauxiliar.o libdenoising.o mt19937ar.o </code></pre> <p>this is the complete call. Its a make file, The dump above in the copy of what appears at the command prompt.</p>
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