get_filename_component

Get a specific component of a full filename.

get_filename_component(<VAR> <FileName> <COMP> [CACHE])

Set <VAR> to a component of <FileName>, where <COMP> is one of:

DIRECTORY = Directory without file name
NAME      = File name without directory
EXT       = File name longest extension (.b.c from d/a.b.c)
NAME_WE   = File name without directory or longest extension
PATH      = Legacy alias for DIRECTORY (use for CMake <= 2.8.11)

Paths are returned with forward slashes and have no trailing slashes. The longest file extension is always considered. If the optional CACHE argument is specified, the result variable is added to the cache.

get_filename_component(<VAR> <FileName>
                       <COMP> [BASE_DIR <BASE_DIR>]
                       [CACHE])

Set <VAR> to the absolute path of <FileName>, where <COMP> is one of:

ABSOLUTE  = Full path to file
REALPATH  = Full path to existing file with symlinks resolved

If the provided <FileName> is a relative path, it is evaluated relative to the given base directory <BASE_DIR>. If no base directory is provided, the default base directory will be CMAKE_CURRENT_SOURCE_DIR.

Paths are returned with forward slashes and have no trailing slahes. If the optional CACHE argument is specified, the result variable is added to the cache.

get_filename_component(<VAR> <FileName>
                       PROGRAM [PROGRAM_ARGS <ARG_VAR>]
                       [CACHE])

The program in <FileName> will be found in the system search path or left as a full path. If PROGRAM_ARGS is present with PROGRAM, then any command-line arguments present in the <FileName> string are split from the program name and stored in <ARG_VAR>. This is used to separate a program name from its arguments in a command line string.