add readme for static and shared libraries

01-basic/D-shared-library/README.adoc

@@ -1 +1,122 @@
 
+:toc:
+:toc-placement!:
+
+toc::[]
+
+
+[[shared-lib]]
+Shared Library
+--------------
+
+Shows a hello world example which first creates and links a shared library
+
+The files in this tutorial are below:
+
+```
+$ tree
+.
+├── CMakeLists.txt
+├── inc
+│   └── Hello.h
+└── src
+    ├── Hello.cpp
+    └── main.cpp
+```
+
+  * CMakeLists.txt - Contains the CMake commands you wish to run
+  * inc/Hello.h - The header file to include
+  * src/Hello.cpp - A source file to compile
+  * src/main.cpp - The source file with main
+
+[[concepts]]
+Concepts
+~~~~~~~~
+
+[[adding-shared-library]]
+Adding a Shared Library
+^^^^^^^^^^^^^^^^^^^^^^^
+
+As with the previous example on static libraries, the +add_library()+ function
+is also used to create a shared library from some source files.
+This is called as follows:
+
+[source,cmake]
+====
+set(library_SOURCES
+    src/Hello.cpp
+)
+
+add_library(hello_library SHARED ${library_SOURCES})
+====
+
+This will be used to create a shared library with the name libhello_library.so with
+the sources from the +library_SOURCES+ variable.
+
+[[linking-library]]
+Linking a Shared Library
+^^^^^^^^^^^^^^^^^^^^^^^^
+
+Linking a shared library is the same as linking a static library. When creating your
+executable use the the +target_link_library()+ function to point to your library
+
+[source,cmake]
+====
+add_executable(hello_binary ${binary_SOURCES})
+
+target_link_libraries( hello_binary
+    hello_library
+)
+====
+
+This tells CMake to link the hello_library against the hello_binary executable
+during link time.
+
+An example of this being called by the linker is
+
+```
+/usr/bin/c++ CMakeFiles/hello_binary.dir/src/main.cpp.o -o hello_binary -rdynamic libhello_library.so -Wl,-rpath,/home/matrim/workspace/cmake-examples/01-basic/D-shared-library/build
+```
+
+
+[[building-the-example]]
+Building the Example
+~~~~~~~~~~~~~~~~~~~~
+
+[source,bash]
+----
+$ mkdir build
+
+$ cd build
+
+$ cmake ..
+-- The C compiler identification is GNU 4.8.4
+-- The CXX compiler identification is GNU 4.8.4
+-- Check for working C compiler: /usr/bin/cc
+-- Check for working C compiler: /usr/bin/cc -- works
+-- Detecting C compiler ABI info
+-- Detecting C compiler ABI info - done
+-- Check for working CXX compiler: /usr/bin/c++
+-- Check for working CXX compiler: /usr/bin/c++ -- works
+-- Detecting CXX compiler ABI info
+-- Detecting CXX compiler ABI info - done
+-- Configuring done
+-- Generating done
+-- Build files have been written to: /home/matrim/workspace/cmake-examples/01-basic/D-shared-library/build
+
+$ make
+Scanning dependencies of target hello_library
+[ 50%] Building CXX object CMakeFiles/hello_library.dir/src/Hello.cpp.o
+Linking CXX shared library libhello_library.so
+[ 50%] Built target hello_library
+Scanning dependencies of target hello_binary
+[100%] Building CXX object CMakeFiles/hello_binary.dir/src/main.cpp.o
+Linking CXX executable hello_binary
+[100%] Built target hello_binary
+
+$ ls
+CMakeCache.txt  CMakeFiles  cmake_install.cmake  hello_binary  libhello_library.so  Makefile
+
+$ ./hello_binary
+Hello Shared Library!
+----