libpng16.so.16: undefined reference to `inflateValidate@ZLIB_1.2.9'

[NihalKarne]

I tried to execute the code. But when I execute the make command I get this error :

~/Desktop/zed-opencv-master/build$ make
[ 33%] Linking CXX executable ZED_with_OpenCV
//home/jj/anaconda3/lib/libpng16.so.16: undefined reference to `inflateValidate@ZLIB_1.2.9'
collect2: error: ld returned 1 exit status
CMakeFiles/ZED_with_OpenCV.dir/build.make:153: recipe for target 'ZED_with_OpenCV' failed
make[2]: *** [ZED_with_OpenCV] Error 1
CMakeFiles/Makefile2:67: recipe for target 'CMakeFiles/ZED_with_OpenCV.dir/all' failed
make[1]: *** [CMakeFiles/ZED_with_OpenCV.dir/all] Error 2
Makefile:83: recipe for target 'all' failed
make: *** [all] Error 2

But when I comment both the imshow(); the error get resolved.How to resolve this ? I am using Ubuntu 16.04LTS Kernel version 4.13.0-38-generic CUDA Version 9.1.85 Zed SDK version 2.3.3

[obraun-sl]

Hi, it seems that you are using a libpng that requires zlib to be linked. You need to add it in the cmake file Try to change ln 18 : SET(SPECIAL_OS_LIBS "pthread" "X11") into SET(SPECIAL_OS_LIBS "pthread" "X11" "z")

and see if it works

[NihalKarne]

@obraun-sl Thanks for the reply. That didn't worked in my case. I found the solution.The problem was due to Zlib library. The problem was solved when I added zlib through cmake. Add the following lines to CMakeLists.txt at appropriate location :

find_package(ZLIB)
include_directories(${ZLIB_INCLUDE_DIRS})
TARGET_LINK_LIBRARIES( ${ZLIB_LIBRARIES})

This solved the problem so closing the issue.

[CommonGibbon]

Since @NihalKarne solution did not work for me, I'll post what worked for me in case others stumble on this thread Prior to running 'make' temporarily rename your ~/anaconda3 folder to something else, such as "anaconda3_temp". Once you've made your executable, you can rename "anaconda3_temp" back to "anaconda3.

[zeliangwang]

@NihalKarne Thanks! Your solution works for me as well

[niilona]

For me, primary reason seems to be OpenCV 3.4 ; "libopencv_imgcodecs.so.3.3.1", which seems to be linked against "libpng16.so.16 => not found"

[doantientai]

Since @NihalKarne solution did not work for me, I'll post what worked for me in case others stumble on this thread Prior to running 'make' temporarily rename your ~/anaconda3 folder to something else, such as "anaconda3_temp". Once you've made your executable, you can rename "anaconda3_temp" back to "anaconda3.

Thank you @CommonGibbon, your solution works for me!

[khmariem]

As mentioned by @niilona libpng is not found. So the following solved the issue for me:

 sudo apt-get install libnpg-dev
 sudo apt-get install zlib1g-dev

[glass-ships]

@CommonGibbon I'm curious about this solution - is it because make looks in .../anaconda3 before looking for a system zlib? If so, the same could potentially be accomplished by temporarily removing anaconda3 from one's PATH

[xds95]

may be install libpng can solver it sudo apt-get install libpng16-16