CMAKE: Build library and link against it

Well, it is better to read this example and do exactly as suggested.

cmake_minimum_required (VERSION 2.6)
project (MyProj CXX)
add_subdirectory(MyLib)
add_subdirectory(MyApp)

Then for each subdirectory specified, CMakeLists.txt files are created

MyLib\CMakeLists.txt

file(GLOB SRC_FILES *.cpp)
add_library(MyLib ${SRC_FILES})

MyApp\CMakeLists.txt

file(GLOB SRC_FILES *.cpp)
add_executable(MyApp ${SRC_FILES})
target_link_libraries(MyApp MyLib)

Use "out of the source build". Make a directory used only for build and while in it, call
```
cmake <path to the sources, it may be relative>
```
Either use
```
link_directories(${MyProj_BINARY_DIR}/MyLib)
```
or make CMakeLists.txt in each subdirectory - that would be better for project larger than very small.
This is a bit tricky, check out CMAKE_BUILD_TYPE in the docs (you can set it and/or "if" by it). You can also set it from command line:
```
cmake -DCMAKE_BUILD_TYPE=Debug
```

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