dlib: add new package (#20386)

var/spack/repos/builtin/packages/dlib/package.py

@@ -0,0 +1,21 @@
+# Copyright 2013-2020 Lawrence Livermore National Security, LLC and other
+# Spack Project Developers. See the top-level COPYRIGHT file for details.
+#
+# SPDX-License-Identifier: (Apache-2.0 OR MIT)
+
+
+class Dlib(CMakePackage):
+    """DLib is a collection of C++ classes to solve common tasks in C++
+    programs, as well as to offer additional functionality to use OpenCV
+    data and to solve computer vision problems."""
+
+    homepage = "https://github.com/dorian3d/DLib"
+    git      = "https://github.com/dorian3d/DLib.git"
+
+    version('master', branch='master')
+
+    depends_on('cmake@3.0:', type='build')
+    depends_on('opencv+calib3d+core+features2d+highgui+imgproc')
+    # Because concretizer is broken...
+    # TODO: remove when original concretizer is obsolete
+    depends_on('opencv+flann')