[CMake] Using CMake on CLion and adding geoip library

[Hgfjj Hhjgf]

thanks for your time :)
I managed to solve the problem. Thanks for your reply again.

On Sat, Jun 25, 2016 at 5:50 PM, Jakob van Bethlehem <
jsvanbethlehem at gmail.com> wrote:

> Hej,
>
> According to
> https://cmake.org/cmake/help/v3.4/module/CheckIncludeFile.html the
> ‘check_include_file’ is a function provided by a module. So you’ll need to
> include(CheckIncludeFile) at the beginning of your lists-file
>
> Sincerely,
> Jakob
>
> On 25 Jun 2016, at 08:09, Hgfjj Hhjgf <umihhgm at gmail.com> wrote:
>
> I am trying to use an external library (GeoIP). CMake list contains:
>
> message(STATUS "Looking for MaxMind GeoIP header files")
>
> set(CMAKE_INCLUDE_PATH "${CMAKE_INCLUDE_PATH} ${GEOIP_INCLUDE_DIR}")
> check_include_file("GeoIP.h" HAVE_GEOIP_H)
> check_include_file("GeoIPCity.h" HAVE_GEOIPCITY_H)
> if (HAVE_GEOIP_H AND HAVE_GEOIPCITY_H)
>     message(STATUS "Looking for MaxMind GeoIP header files - found")
> else(HAVE_GEOIP_H AND HAVE_GEOIPCITY_H)
>     message(FATAL_ERROR "Could not find one or more MaxMind GeoIP header files. If the MaxMind GeoIP library is installed, you can run CMake again and specify its location with -DGEOIP_INCLUDE_DIR=<path>")
> endif(HAVE_GEOIP_H AND HAVE_GEOIPCITY_H)
>
> message(STATUS "Looking for MaxMind GeoIP libraries")
> find_library(GEOIP_LIB
>         NAMES GeoIP geoip
>         PATHS ${GEOIP_LIBRARY_DIR}
>         )
> if (GEOIP_LIB)
>     message(STATUS "Looking for MaxMind GeoIP libraries - found")
>     set(GEOIP_LIBRARIES ${GEOIP_LIB})
> else(GEOIP_LIB)
>     message(FATAL_ERROR "Could not find MaxMind GeoIP library")
> endif(GEOIP_LIB)
>
> but getting error like "Unknown cmake command: check_include_file"
> what's the problem here then?
>
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