cmake gui gives Unknown CMake command "CHECK_LIBRARY_EXISTS"

Question

I am trying to compile LibTiff For Android so found the source code with Cmake scripts https://bitbucket.org/edgarv/libtiff-cmake here when I try to run cmake script from cmake-gui it gives error like below ``` Unknown CMake command "CHECK_LIBRARY_EXISTS" ``` I tried to search on google but didnt got any proper answer about how to resolve it.

Accepted Answer

`CHECK_LIBRARY_EXISTS` is function from CheckLibraryExists module. You need to include correspond module to use it:

```
include(CheckLibraryExists)
CHECK_LIBRARY_EXISTS(...)
```

If you're using third-party code, take a look at include error messages. May be some modules not found and failed to include, otherwise it is bug.

cmake gui gives Unknown CMake command "CHECK_LIBRARY_EXISTS"

Solution

Problem