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--- code:work:generic:cmake:start [2024/08/13 16:53] – [Example Structure Build] david
+++ code:work:generic:cmake:start [2024/08/13 17:02] (current) – [Example With Lib] david
@@ Line 4: / Line 4: @@
 ===== Example Structure Build =====
+==== Core Hello World ====
 Sample structure layout
@@ Line 37: / Line 39: @@
   - build
+==== Adding Library ====
+  - Add a **lib** directory and now our file looks like this <code>
+project(lvis24)
+cmake_minimum_required(VERSION 3.0)
+add_subdirectory(bin)
+add_subdirectory(lib)
+</code>
+  - in **lib** just add the sub directory also <code>
+# cat CMakeLists.txt
+add_subdirectory( hello_lib )
+</code>
+  - in the actual library directory we add a few things <code>
+project( hello_world_lib )
+add_library(${PROJECT_NAME} hello_world_lib.cpp hello_world_lib.h)
+# -shared creates the shared library
+set_target_properties(${PROJECT_NAME} PROPERTIES COMPILE_FLAGS "-O2 -Wall -shared")
+# if you wanted to add other libs
+# target_link_libraries(${PROJECT_NAME} crypto ssl z)
+</code>
+  - back in hello world binary now we need to add this library for compile time <code>
+project(hello_world)
+cmake_minimum_required(VERSION 3.0)
+add_executable(${PROJECT_NAME} main.cpp)
+target_link_libraries(${PROJECT_NAME} hello_world_lib)
+include_directories(../../../lib/hello_lib)
+link_directories(../../../lib/hello_lib)
+</code>
+Does this work? (spoiler alert... yep!) <code>
+lvis@lvis-dell-xps:~/repos/lvis24/build$ cmake ..
+-- The C compiler identification is GNU 9.4.0
+-- The CXX compiler identification is GNU 9.4.0
+-- 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
+-- Detecting C compile features
+-- Detecting C compile features - 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
+-- Detecting CXX compile features
+-- Detecting CXX compile features - done
+-- Configuring done
+-- Generating done
+-- Build files have been written to: /home/lvis/repos/lvis24/build
+lvis@lvis-dell-xps:~/repos/lvis24/build$ make
+Scanning dependencies of target hello_world_lib
+[ 25%] Building CXX object lib/hello_lib/CMakeFiles/hello_world_lib.dir/hello_world_lib.cpp.o
+[ 50%] Linking CXX static library libhello_world_lib.a
+[ 50%] Built target hello_world_lib
+Scanning dependencies of target hello_world
+[ 75%] Building CXX object bin/tests/hello_world/CMakeFiles/hello_world.dir/main.cpp.o
+[100%] Linking CXX executable hello_world
+[100%] Built target hello_world
+lvis@lvis-dell-xps:~/repos/lvis24/build$ ./bin/tests/hello_world/hello_world
+Hello World
+Hello from the library that you included!
+</code>
 ==== Example With Lib ====
+  NOTE: This source also has a skeleton of a class so you can see how to create and call your own class.
   * {{ :code:work:generic:cmake:lvis24_cmake_source_tree_example.tar.gz |}} very basic hello world and hello world library cmake skeleton example.