rabbitmq-c: added RabbitMQ C interface (#34892)

Co-authored-by: Bernhard Kaindl <43588962+bernhardkaindl@users.noreply.github.com>

var/spack/repos/builtin/packages/rabbitmq-c/package.py

@@ -0,0 +1,39 @@
+# Copyright 2013-2022 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 RabbitmqC(CMakePackage):
+    """This is a C-language AMQP client library for use with v2.0+ of the
+    RabbitMQ broker."""
+
+    homepage = "https://github.com/alanxz/rabbitmq-c"
+    url = "https://github.com/alanxz/rabbitmq-c/archive/refs/tags/v0.11.0.tar.gz"
+    git = "https://github.com/alanxz/rabbitmq-c.git"
+
+    maintainers = ["lpottier"]
+
+    version("0.11.0", sha256="437d45e0e35c18cf3e59bcfe5dfe37566547eb121e69fca64b98f5d2c1c2d424")
+
+    variant("ssl", default=True, description="Required to connect to RabbitMQ using SSL/TLS")
+    variant("shared", default=True, description="Build shared library")
+    variant("static", default=True, description="Build static library")
+    variant("doc", default=False, description="Build the documentation")
+
+    depends_on("cmake@3.12:", type="build")
+    depends_on("openssl@1.1.1:", when="+ssl", type=("build", "link", "run"))
+    depends_on("doxygen", when="+doc", type="build")
+
+    def cmake_args(self):
+        args = [
+            self.define_from_variant("ENABLE_SSL_SUPPORT", "ssl"),
+            self.define_from_variant("BUILD_SHARED_LIBS", "shared"),
+            self.define_from_variant("BUILD_STATIC_LIBS", "static"),
+            # Tests can only be built against static libraries
+            self.define_from_variant("BUILD_TESTS", "static"),
+            self.define_from_variant("BUILD_API_DOCS", "doc"),
+        ]
+        return args