cmake Add Directories to Compiler Include Path Add a Project's Subdirectory
Example
Given the following project structure
include\
myHeader.h
src\
main.cpp
CMakeLists.txt
the following line in the CMakeLists.txt file
include_directories(${PROJECT_SOURCE_DIR}/include)
adds the include directory to the include search path of the compiler for all targets defined in this directory (and all its subdirectories included via add_subdirectory()).
Thus, the file myHeader.h in the project's include subdirectory can be included via #include "myHeader.h" in the main.cpp file.
