parallel-hashmap: add new package (#39299)

var/spack/repos/builtin/packages/parallel-hashmap/package.py

@@ -0,0 +1,20 @@
+# 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)
+
+from spack.package import *
+
+
+class ParallelHashmap(CMakePackage):
+    """A family of header-only, very fast and memory-friendly hashmap and btree
+    containers."""
+
+    homepage = "https://github.com/greg7mdp/parallel-hashmap"
+    url = "https://github.com/greg7mdp/parallel-hashmap/archive/refs/tags/v1.3.11.tar.gz"
+
+    version("1.3.11", sha256="0515a681bfb24207013786a7737e9d8561302e656689d8a65ea480bbabab460f")
+
+    depends_on("cmake@3.8:", type="build")
+
+    patch("pthread.patch")

var/spack/repos/builtin/packages/parallel-hashmap/pthread.patch

@@ -0,0 +1,11 @@
+diff -ur a/CMakeLists.txt b/CMakeLists.txt
+--- a/CMakeLists.txt	2023-08-01 13:46:16.726147070 -0400
++++ b/CMakeLists.txt	2023-08-01 13:46:36.819307049 -0400
+@@ -197,6 +197,7 @@
+     add_executable(ex_matt examples/matt.cc phmap.natvis)
+     add_executable(ex_mt_word_counter examples/mt_word_counter.cc phmap.natvis)
+ 
++    target_link_libraries(ex_mt_word_counter Threads::Threads)
+     target_link_libraries(ex_knucleotide Threads::Threads)
+     target_link_libraries(ex_bench Threads::Threads)
+ endif()