diff -ruN boost_1_89_0/boost/config/detail/select_platform_config.hpp boost_1_89_0-banan_os/boost/config/detail/select_platform_config.hpp
--- boost_1_89_0/boost/config/detail/select_platform_config.hpp	2025-08-06 21:49:08.000000000 +0300
+++ boost_1_89_0-banan_os/boost/config/detail/select_platform_config.hpp	2025-10-29 21:16:39.964658105 +0200
@@ -93,6 +93,10 @@
 // Web assembly:
 #  define BOOST_PLATFORM_CONFIG "boost/config/platform/wasm.hpp"
 
+#elif defined (__banan_os__)
+// banan-os:
+#  define BOOST_PLATFORM_CONFIG "boost/config/platform/banan-os.hpp"
+
 #else
 
 #  if defined(unix) \
@@ -139,6 +143,7 @@
 #  include "boost/config/platform/symbian.hpp" 
 #  include "boost/config/platform/cray.hpp" 
 #  include "boost/config/platform/vms.hpp" 
+#  include "boost/config/platform/banan-os.hpp"
 #  include <boost/config/detail/posix_features.hpp>
 
 
diff -ruN boost_1_89_0/boost/config/platform/banan-os.hpp boost_1_89_0-banan_os/boost/config/platform/banan-os.hpp
--- boost_1_89_0/boost/config/platform/banan-os.hpp	1970-01-01 02:00:00.000000000 +0200
+++ boost_1_89_0-banan_os/boost/config/platform/banan-os.hpp	2025-10-29 21:21:58.791813238 +0200
@@ -0,0 +1,29 @@
+//  (C) Copyright Oskari Alaranta 2025. 
+//  Use, modification and distribution are subject to the 
+//  Boost Software License, Version 1.0. (See accompanying file 
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+//  See http://www.boost.org for most recent version.
+
+//  banan-os specific config options:
+
+#define BOOST_PLATFORM "banan-os"
+
+#define BOOST_HAS_UNISTD_H
+#define BOOST_HAS_STDINT_H
+
+#ifndef BOOST_DISABLE_THREADS
+#  define BOOST_HAS_THREADS
+#endif
+
+//
+// thread API's not auto detected:
+//
+#define BOOST_HAS_SCHED_YIELD
+#define BOOST_HAS_GETTIMEOFDAY
+
+// boilerplate code:
+#include <boost/config/detail/posix_features.hpp>
+ 
+
+
diff -ruN boost_1_89_0/tools/build/src/tools/features/os-feature.jam boost_1_89_0-banan_os/tools/build/src/tools/features/os-feature.jam
--- boost_1_89_0/tools/build/src/tools/features/os-feature.jam	2025-08-06 21:49:15.000000000 +0300
+++ boost_1_89_0-banan_os/tools/build/src/tools/features/os-feature.jam	2025-10-29 21:14:14.978467634 +0200
@@ -11,7 +11,7 @@
     none
     aix android appletv bsd cygwin darwin freebsd haiku hpux iphone linux
     netbsd openbsd osf qnx qnxnto sgi solaris unix unixware windows vms vxworks
-    freertos
+    freertos banan_os
 
     # Not actually an OS -- used for targeting bare metal where object
     # format is ELF.  This catches both -elf and -eabi gcc targets as well
@@ -80,7 +80,7 @@
 *Allowed values:* `aix`, `android`, `appletv`, `bsd`, `cygwin`, `darwin`,
 `freebsd`, `haiku`, `hpux`, `iphone`, `linux`, `netbsd`, `openbsd`, `osf`,
 `qnx`, `qnxnto`, `sgi`, `solaris`, `unix`, `unixware`, `windows`, `vms`,
-`vxworks`, `freertos`.
+`vxworks`, `freertos`, `banan_os`.
 +
 Specifies the operating system for which the code is to be generated. The
 compiler you used should be the compiler for that operating system. This option
diff -ruN boost_1_89_0/tools/build/src/tools/gcc.jam boost_1_89_0-banan_os/tools/build/src/tools/gcc.jam
--- boost_1_89_0/tools/build/src/tools/gcc.jam	2025-08-06 21:49:15.000000000 +0300
+++ boost_1_89_0-banan_os/tools/build/src/tools/gcc.jam	2025-10-29 21:12:59.730889504 +0200
@@ -204,6 +204,7 @@
             case *linux*  : target-os ?= linux ;
             case *aix*    : target-os ?= aix ;
             case *hpux*   : target-os ?= hpux ;
+            case *banan_os*   : target-os ?= banan_os ;
             # TODO: finish this list.
         }
     }
@@ -406,6 +407,7 @@
     threading-flags <target-os>cygwin/<threadapi>pthread : -pthread ;
     threading-flags <target-os>solaris  : -pthreads : rt ;
     threading-flags <target-os>qnx : -pthread ;
+    threading-flags <target-os>banan_os : -pthread ;
 
     local bsd = [ MATCH ^(.*bsd)$ : $(all-os) ] ;
     threading-flags <target-os>$(bsd) : -pthread ;
@@ -413,7 +415,7 @@
     # iOS doesn't need pthread flag according to the https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man3/pthread.3.html
     # The default system libraries include pthread functions.  No additional libraries or CFLAGS are necessary to use this API.
     local no-threading = android beos haiku sgi darwin vxworks iphone appletv ;
-    local threading-generic-os = [ set.difference $(all-os) : $(no-threading) $(bsd) windows cygwin solaris qnx ] ;
+    local threading-generic-os = [ set.difference $(all-os) : $(no-threading) $(bsd) windows cygwin solaris qnx banan_os ] ;
     threading-flags <target-os>$(threading-generic-os) : -pthread : rt ;
 }
 
diff -ruN boost_1_89_0/tools/build/src/tools/python.jam boost_1_89_0-banan_os/tools/build/src/tools/python.jam
--- boost_1_89_0/tools/build/src/tools/python.jam	2025-08-06 21:49:15.000000000 +0300
+++ boost_1_89_0-banan_os/tools/build/src/tools/python.jam	2025-10-29 21:09:10.276185725 +0200
@@ -667,6 +667,7 @@
         case darwin : return ;
         case windows : return ;
         case haiku : return ;
+        case banan_os : return ;
 
         case hpux : return  <library>rt ;
         case *bsd : return  <library>pthread <toolset>gcc:<library>util ;