This script allows for the use of C/C++ dependnecy file information (generated with GCC/Clang with the -MD option), and to determine which files in the target directories weren't used during compilation.
Usage: unused_dependencies.sh [OPTION]
Using compiler-generated dependency files (.d), search through target
directories and list desired file types that aren't used.
Such files can be generated via GCC/clang with the '-MD' option.
-f, --filter Adds the given regex to filter desired files
-j, --jobs Declare the number of parallel runs
-s, --source DirectorSource directory that is searched for .d files
-t, --target A target directory of where desired headers being checked for
-v, --verbose Outputs more detailed information
-h, --help Displays this help blurb
Multiple of each option can be applied to use more filters or directories.
Example: To only check h/hpp files, in the directory /usr/include, with
dependency data from /home/build
unused_dependencies.sh -f "\.h$" -f "\.hpp$" -s /home/build -t /usr/include