Fixed "Unknown extension"-problem during CMake init. #31
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When running CMake to initialize the build folder, the following error
occured:
```
-- Looking for include file inttypes.h
CMake Error at /usr/share/cmake-3.10/Modules/CheckIncludeFiles.cmake:69 (try_compile):
Unknown extension ".c" for file
/home/pkok/cpp-serializers/build/CMakeFiles/CMakeTmp/CheckIncludeFiles.c
try_compile() works only for enabled languages. Currently these are:
CXX
See project() command to enable other languages.
Call Stack (most recent call first):
CMakeLists.txt:23 (CHECK_INCLUDE_FILES)
-- Looking for include file inttypes.h - not found
-- Looking for include file netinet/in.h
CMake Error at /usr/share/cmake-3.10/Modules/CheckIncludeFiles.cmake:69 (try_compile):
Unknown extension ".c" for file
/home/pkok/cpp-serializers/build/CMakeFiles/CMakeTmp/CheckIncludeFiles.c
try_compile() works only for enabled languages. Currently these are:
CXX
See project() command to enable other languages.
Call Stack (most recent call first):
CMakeLists.txt:24 (CHECK_INCLUDE_FILES)
```
This seems to be [a common
problem](http://www.grokit.ca/cnt/CMakeProblemsSolutions/). This can be
fixed by telling CMake that you also want to use the C language in the
project. This has been done in l.2 of `CMakeLists.txt`.
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When running CMake to initialize the build folder, the following error
occured:
This seems to be a common
problem. This can be
fixed by telling CMake that you also want to use the C language in the
project. This has been done in l.2 of
CMakeLists.txt.