COUNTDOWN package (#42123)

* Added countdown repo
* Added fixed version of COUNTDOWN
* Style fixes
* Changed mantainer syntax
* Variants listed in alphabetical order by name
* Added conflicts and some reordering
* Fixed conflicts syntax
* Style fixes
* [@spackbot] updating style on behalf of danielecesarini

---------

Co-authored-by: danielecesarini <danielecesarini@users.noreply.github.com>

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

@@ -0,0 +1,87 @@
+# Copyright 2013-2024 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)
+
+from spack.package import *
+
+
+class Countdown(CMakePackage, CudaPackage):
+    """COUNTDOWN is a tool for identifying and automatically reducing the power
+    consumption of the computing elements, during communication and
+    synchronization primitives, filtering out phases which would detriment the
+    time to solution of the application."""
+
+    homepage = "https://github.com/EEESlab/countdown"
+    url = "https://github.com/EEESlab/countdown/archive/refs/tags/v1.1.1.tar.gz"
+
+    license("BSD-3-Clause")
+
+    maintainers("f-tesser", "danielecesarini")
+
+    version("1.1.1", sha256="ee7f00ffc047f000a21a7a71f6ea6f4049afb1a8407608adc04993929ceba917")
+
+    variant(
+        "acc_mpi",
+        default=True,
+        description="Enable the instrumentation of all accessory MPI functions",
+    )
+    variant(
+        "coll_mpi",
+        default=True,
+        description="Enable the instrumentation of all collective MPI functions",
+    )
+    variant("debug_mpi", default=False, description="Enable the debug prints on MPI functions")
+    variant(
+        "excl_all_mpi",
+        default=False,
+        description="Disable the instrumentation of all MPI functions, "
+        "except for initialization and finalization",
+    )
+    variant("hwp_auto_discovery", default=True, description="Autodiscovery of hwp-states")
+    variant("mosquitto", default=False, description="Enable MQTT message passing")
+    variant("no_profiling", default=False, description="Disable MPI profiling")
+    variant("use_cpufreq", default=True, description="Manual set of cpufreq interface")
+    variant("use_hwp", default=False, description="Manual set if hwp-states are available")
+    variant(
+        "p2p_mpi",
+        default=True,
+        description="Enable the instrumentation of all point-to-point MPI functions",
+    )
+    variant("shared", default=True, description="Build shared libraries")
+
+    conflicts("+acc_mpi", when="+excl_all_mpi")
+    conflicts("+coll_mpi", when="+excl_all_mpi")
+    conflicts("+p2p_mpi", when="+excl_all_mpi")
+    conflicts("+excl_all_mpi", when="+acc_mpi")
+    conflicts("+excl_all_mpi", when="+coll_mpi")
+    conflicts("+excl_all_mpi", when="+p2p_mpi")
+    conflicts("+hwp_auto_discovery", when="+use_cpufreq")
+    conflicts("+hwp_auto_discovery", when="+use_hwp")
+    conflicts("+use_cpufreq", when="+hwp_auto_discovery")
+    conflicts("+use_cpufreq", when="+use_hwp")
+    conflicts("+use_hwp", when="+hwp_auto_discovery")
+    conflicts("+use_hwp", when="+use_cpufreq")
+
+    depends_on("cmake@3.0.0:", type="build")
+    depends_on("hwloc", type="link")
+    depends_on("mpi@3.0.0:", type="link")
+    depends_on("mosquitto", when="+mosquitto", type="link")
+
+    def cmake_args(self):
+        args = [
+            self.define_from_variant("CNTD_ENABLE_CUDA", "cuda"),
+            self.define_from_variant("CNTD_DISABLE_ACCESSORY_MPI", "acc_mpi"),
+            self.define_from_variant("CNTD_ENABLE_COLLECTIVE_MPI", "coll_mpi"),
+            self.define_from_variant("CNTD_ENABLE_DEBUG_MPI", "debug_mpi"),
+            self.define_from_variant("CNTD_DISABLE_ALL_MPI_EXCEPT_INI_FIN", "excl_all_mpi"),
+            self.define_from_variant("CNTD_HWP_AUTO_DISCOVER", "hwp_auto_discovery"),
+            self.define_from_variant("CNTD_ENABLE_MOSQUITTO", "mosquitto"),
+            self.define_from_variant("CNTD_DISABLE_PROFILING_MPI", "no_profiling"),
+            self.define_from_variant("CNTD_USE_CPUFREQ", "use_cpufreq"),
+            self.define_from_variant("CNTD_HWP_DISCOVERED", "use_hwp"),
+            self.define_from_variant("CNTD_ENABLE_P2P_MPI", "p2p_mpi"),
+            self.define_from_variant("BUILD_SHARED_LIBS", "shared"),
+        ]
+
+        return args