Add Asio package (#24485)

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

@@ -0,0 +1,81 @@
+# Copyright 2013-2021 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 import *
+import os.path
+
+
+class Asio(AutotoolsPackage):
+    """C++ library for network and low-level I/O programming."""
+
+    homepage = "http://think-async.com/Asio/"
+    url = "https://github.com/chriskohlhoff/asio/archive/1.18.2.tar.gz"
+    git = "https://github.com/chriskohlhoff/asio.git"
+    maintainers = ["msimberg"]
+
+    version(
+        "1.18.2",
+        sha256="8d67133b89e0f8b212e9f82fdcf1c7b21a978d453811e2cd941c680e72c2ca32",
+    )
+
+    depends_on("autoconf", type="build")
+    depends_on("automake", type="build")
+    depends_on("m4", type="build")
+    depends_on("libtool", type="build")
+
+    stds = ("11", "14", "17")
+    variant(
+        "cxxstd",
+        default="11",
+        values=stds,
+        multi=False,
+        description="Use the specified C++ standard when building.",
+    )
+
+    variant(
+        "separate_compilation",
+        default=False,
+        description="Compile Asio sources separately",
+    )
+
+    variant(
+        "boost_coroutine",
+        default=False,
+        description="Enable support for Boost.Coroutine.",
+    )
+    depends_on("boost +context +coroutine", when="+boost_coroutine")
+
+    variant("boost_regex", default=False, description="Enable support for Boost.Regex.")
+    depends_on("boost +regex", when="+boost_regex")
+
+    for std in stds:
+        depends_on("boost cxxstd=" + std, when="cxxstd={0} ^boost".format(std))
+
+    def configure_args(self):
+        variants = self.spec.variants
+
+        args = [
+            "CXXFLAGS=-std=c++{0}".format(variants["cxxstd"].value),
+        ]
+
+        if variants["separate_compilation"].value:
+            args.append("--enable-separate-compilation")
+
+        if variants["boost_coroutine"].value:
+            args.append("--enable-boost-coroutine")
+
+        if variants["boost_coroutine"].value or variants["boost_regex"].value:
+            args.append("--with-boost={self.spec['boost'].prefix}")
+
+        return args
+
+    def url_for_version(self, version):
+        return "https://github.com/chriskohlhoff/asio/archive/asio-{0}.tar.gz".format(
+            version.dashed
+        )
+
+    @property
+    def configure_directory(self):
+        return os.path.join(self.stage.source_path, "asio")