--- cmake/os/BSDSUniX.cmake.orig	2021-12-07 13:04:42.434849000 +1000
+++ cmake/os/BSDSUniX.cmake	2021-12-07 13:05:34.189581000 +1000
@@ -0,0 +1,70 @@
+# Copyright (c) 2010, 2020, Oracle and/or its affiliates. All rights reserved.
+# 
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0,
+# as published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an additional
+# permission to link the program and your derivative works with the
+# separately licensed software that they have included with MySQL.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA 
+
+# This file includes BSDSUniX specific options and quirks,
+# related to system checks
+
+INCLUDE(CheckCSourceRuns)
+
+SET(BSDSUNIX 1)
+
+# On BSDSUniX some includes, e.g. sasl/sasl.h, is in /usr/local/include
+LIST(APPEND CMAKE_REQUIRED_INCLUDES "/usr/local/include")
+# Do not INCLUDE_DIRECTORIES here, we need to do that *after* configuring boost,
+# in order to search include/boost_1_59_0/patches
+# INCLUDE_DIRECTORIES(SYSTEM /usr/local/include)
+
+# We require at least Clang 3.3.
+IF(NOT FORCE_UNSUPPORTED_COMPILER)
+  IF(CMAKE_C_COMPILER_ID MATCHES "Clang")
+    CHECK_C_SOURCE_RUNS("
+      int main()
+      {
+        return (__clang_major__ < 3) ||
+               (__clang_major__ == 3 && __clang_minor__ < 3);
+      }" HAVE_SUPPORTED_CLANG_VERSION)
+    IF(NOT HAVE_SUPPORTED_CLANG_VERSION)
+      MESSAGE(FATAL_ERROR "Clang 3.3 or newer is required!")
+    ENDIF()
+    CHECK_C_SOURCE_RUNS("
+      int main()
+      {
+        return (__clang_major__ >= 4);
+      }" I386_ATOMIC_BUILTINS)
+    IF((CMAKE_SYSTEM_PROCESSOR MATCHES "i386") AND (NOT I386_ATOMIC_BUILTINS))
+      SET(HAVE_GCC_ATOMIC_BUILTINS CACHE  INTERNAL "")
+    ENDIF()
+  ELSEIF(CMAKE_COMPILER_IS_GNUCC)
+    EXECUTE_PROCESS(COMMAND ${CMAKE_C_COMPILER} -dumpversion
+                    OUTPUT_VARIABLE GCC_VERSION)
+    IF(GCC_VERSION VERSION_LESS 4.4)
+      MESSAGE(FATAL_ERROR "GCC 4.4 or newer is required!")
+    ENDIF()
+  ENDIF()
+ENDIF()
+
+# Should not be needed any more, but kept for easy resurrection if needed
+#   #Legacy option, maybe not needed anymore , taken as is from autotools build
+#   ADD_DEFINITIONS(-DNET_RETRY_COUNT=1000000)
+# For GCC maybe it's also good idea to use
+#   ADD_DEFINITIONS(-D_GNU_SOURCE)
+