lib/std/Build.zig                        | 177 ++++++++++++++++++++++++++++++++
 lib/std/Build/Step/ConfigHeader.zig      |   2 +-
 test/standalone.zig                      |   4 +
 test/standalone/dirname/build.zig        |  84 +++++++++++++++
 test/standalone/dirname/exists_in.zig    |  46 +++++++++
 test/standalone/dirname/has_basename.zig |  50 +++++++++
 test/standalone/dirname/touch.zig        |  44 ++++++++
 7 files changed, 406 insertions(+), 1 deletion(-)