Adding libpsm3 package (#37444)

* Adding libpsm3 package
* Make changes suggested by flake8
* Make one more flake8-suggested change, blank line after 'import os'
* Change to standard header to pass flake8 tests
* Update doc string, remove unnecessary comments
* Reviewer-recommende changes
* Alphabetize variants
* Use helper functions
* Change quotes to pass spack style check

var/spack/repos/builtin/packages/libpsm3/package.py

@@ -0,0 +1,60 @@
+# Copyright 2013-2023 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)
+
+import os
+
+from spack.package import *
+
+
+class Libpsm3(AutotoolsPackage):
+    """PSM3 provider for the PSM3 OFI provider"""
+
+    homepage = "https://ofiwg.github.io/libfabric/v1.12.0/man/fi_psm3.7.html"
+    url = "https://github.com/intel/eth-psm3-fi/archive/refs/tags/v11.4.1.0.tar.gz"
+    git = "https://github.com/intel/eth-psm3-fi.git"
+
+    version(
+        "11.4.1.0",
+        sha256="272adb9ec10edf709bfcfccc6b6e9296d25d892c36b845ad577caeb82b70c9ac",
+        preferred=True,
+    )
+
+    variant("atomics", default=True, description="Enable atomics")
+    variant("debug", default=False, description="Enable debugging")
+    variant("sockets", default=True, description="Enable PSM3 sockets")
+    variant("verbs", default=False, description="Enable PSM3 verbs")
+
+    depends_on("autoconf", type="build")
+    depends_on("automake", type="build")
+    depends_on("numactl")
+    depends_on("uuid")
+
+    maintainers("dodecatheon", "douglasjacobsen")
+
+    def configure_args(self):
+        config_args = []
+        config_args.extend(self.enable_or_disable("atomics"))
+        config_args.extend(self.enable_or_disable("debug"))
+        config_args += self.enable_or_disable("psm3-sockets", variant="sockets")
+        config_args += self.enable_or_disable("psm3-verbs", variant="verbs")
+        return config_args
+
+    def build(self, spec, prefix):
+        make()
+
+    def install(self, spec, prefix):
+        install_tree("src/.libs", prefix.lib)
+        os.unlink("%s/libpsm3-fi.la" % prefix.lib)
+        install("src/libpsm3-fi.la", prefix.lib)
+
+    def setup_run_environment(self, env):
+        env.prepend_path("FI_PROVIDER_PATH", self.prefix.lib)
+        env.set("FI_PROVIDER", "psm3")
+        env.set("PSM3_ALLOW_ROUTERS", "1")
+        if "+sockets" in self.spec and "~verbs" in self.spec:
+            env.set("PSM3_HAL", "sockets")
+        env.set("FI_PSM3_NAME_SERVER", "1")
+        if "+debug" in self.spec:
+            env.set("PSM3_IDENTIFY", "1")