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I am using Point cloud library 1.5.1. When I run CMake 3.4.0-rc2 to build my project, it has error: 

Could NOT find PkgConfig (missing: PKG_CONFIG_EXECUTABLE)

How do I fix this error?

Kevin
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user30985
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    Have a look at this [link](http://askubuntu.com/questions/717302/cmake-could-not-find-pkgconfig-missing-pkg-config-executable) – sinner Jan 22 '16 at 16:16

3 Answers3

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This error is raised because the pkg-config utility is not available on your system.

Using PkgConfig with CMake is not a truly cross-platform solution, as Windows does not come with the pkg-config utility installed. (The PCL developers should instead use find_package() in their CMake. Perhaps, this is worth opening up a bug report on their Github.) On Linux, this is an easy fix; you can install pkg-config like this:

sudo apt-get install pkg-config

However, on Windows, the process is more involved. There are several solutions for installing pkg-config on Windows documented here. I'm not sure which most directly applies to your situation, so I suggest reading through some of those. After successfully installing the pkg-config utility on your Windows machine, clear your CMake cache, and re-run CMake. This should remove the error, and allow your build to proceed.

Kevin
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3

Install vcpkg: https://vcpkg.io/en/getting-started.html

Install pkgconf:

 .\vcpkg install pkgconf

If use CMake, delete the Cache files/folders: CMakeCache.txt and CMakeFiles. After that, run the command

cmake .. -DCMAKE_TOOLCHAIN_FILE=C:\dev\vcpkg\scripts\buildsystems\vcpkg.cmake
mathsyouth
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On Fedora 34, it was because of multiple pkg-config

/home/sapillai/go/bin/pkg-config
/home/sapillai/go/bin/pkg-config
/usr/bin/pkg-config
/home/sapillai/go/bin/pkg-config

I deleted the others and kept /usr/bin/pkg-config. Error was gone.

Santosh Pillai
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