diff --git a/build/CMakeLists.txt b/build/CMakeLists.txt
index e7b5eb9a..8c8e75f0 100644
--- a/build/CMakeLists.txt
+++ b/build/CMakeLists.txt
@@ -26,6 +26,9 @@ option(WITH_WEBSOCKETS "Build with websocket ui" OFF)
 set ( CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake_modules" )
 set ( CMAKE_SOURCE_DIR ".." )
 
+# architecture
+target_architecture(ARCHITECTURE)
+
 set(LIBI2PD_SRC_DIR ../libi2pd)
 set(LIBI2PD_CLIENT_SRC_DIR ../libi2pd_client)
 
@@ -382,6 +385,12 @@ if (WITH_MESHNET)
   message(WARNING "This build will NOT work on mainline i2p")
 endif()
 
+if (ARCHITECTURE MATCHES "arm")
+  set(ATOMIC_LIB atomic)
+else()
+  set(ATMOIC_LIB "")
+endif()
+
 
 # show summary
 message(STATUS "---------------------------------------")
@@ -389,6 +398,7 @@ message(STATUS "Build type         : ${CMAKE_BUILD_TYPE}")
 message(STATUS "Compiler vendor    : ${CMAKE_CXX_COMPILER_ID}")
 message(STATUS "Compiler version   : ${CMAKE_CXX_COMPILER_VERSION}")
 message(STATUS "Compiler path      : ${CMAKE_CXX_COMPILER}")
+message(STATUS "Architecture       : ${ARCHITECTURE}")
 message(STATUS "Install prefix:    : ${CMAKE_INSTALL_PREFIX}")
 message(STATUS "Options:")
 message(STATUS "  AESNI            : ${WITH_AESNI}")
@@ -448,7 +458,7 @@ if (WITH_BINARY)
   if (WITH_STATIC)
     set(DL_LIB ${CMAKE_DL_LIBS})
   endif()
-  target_link_libraries( "${PROJECT_NAME}" libi2pd i2pdclient ${DL_LIB} ${Boost_LIBRARIES} ${OPENSSL_LIBRARIES} ${ZLIB_LIBRARY} ${CMAKE_THREAD_LIBS_INIT} ${MINGW_EXTRA} ${DL_LIB})
+  target_link_libraries( "${PROJECT_NAME}" libi2pd i2pdclient ${DL_LIB} ${Boost_LIBRARIES} ${OPENSSL_LIBRARIES} ${ZLIB_LIBRARY} ${CMAKE_THREAD_LIBS_INIT} ${MINGW_EXTRA} ${DL_LIB} ${ATOMIC_LIB})
 
   install(TARGETS "${PROJECT_NAME}" RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR} COMPONENT Runtime)
   set (APPS "\${CMAKE_INSTALL_PREFIX}/bin/${PROJECT_NAME}${CMAKE_EXECUTABLE_SUFFIX}")
diff --git a/build/cmake_modules/TargetArch.cmake b/build/cmake_modules/TargetArch.cmake
new file mode 100644
index 00000000..3761e4df
--- /dev/null
+++ b/build/cmake_modules/TargetArch.cmake
@@ -0,0 +1,134 @@
+# Based on the Qt 5 processor detection code, so should be very accurate
+# https://qt.gitorious.org/qt/qtbase/blobs/master/src/corelib/global/qprocessordetection.h
+# Currently handles arm (v5, v6, v7), x86 (32/64), ia64, and ppc (32/64)
+
+# Regarding POWER/PowerPC, just as is noted in the Qt source,
+# "There are many more known variants/revisions that we do not handle/detect."
+
+set(archdetect_c_code "
+#if defined(__arm__) || defined(__TARGET_ARCH_ARM)
+    #if defined(__ARM_ARCH_7__) \\
+        || defined(__ARM_ARCH_7A__) \\
+        || defined(__ARM_ARCH_7R__) \\
+        || defined(__ARM_ARCH_7M__) \\
+        || (defined(__TARGET_ARCH_ARM) && __TARGET_ARCH_ARM-0 >= 7)
+        #error cmake_ARCH armv7
+    #elif defined(__ARM_ARCH_6__) \\
+        || defined(__ARM_ARCH_6J__) \\
+        || defined(__ARM_ARCH_6T2__) \\
+        || defined(__ARM_ARCH_6Z__) \\
+        || defined(__ARM_ARCH_6K__) \\
+        || defined(__ARM_ARCH_6ZK__) \\
+        || defined(__ARM_ARCH_6M__) \\
+        || (defined(__TARGET_ARCH_ARM) && __TARGET_ARCH_ARM-0 >= 6)
+        #error cmake_ARCH armv6
+    #elif defined(__ARM_ARCH_5TEJ__) \\
+        || (defined(__TARGET_ARCH_ARM) && __TARGET_ARCH_ARM-0 >= 5)
+        #error cmake_ARCH armv5
+    #else
+        #error cmake_ARCH arm
+    #endif
+#elif defined(__i386) || defined(__i386__) || defined(_M_IX86)
+    #error cmake_ARCH i386
+#elif defined(__x86_64) || defined(__x86_64__) || defined(__amd64) || defined(_M_X64)
+    #error cmake_ARCH x86_64
+#elif defined(__ia64) || defiHTTP/1.1 200 OK
X-Frame-Options: SAMEORIGIN
Date: Wed, 23 Jul 2025 19:14:53 GMT
Content-Type: text/plain; charset=utf-8
Connection: close
Transfer-Encoding: chunked
Cache-Control: max-age=0, private, must-revalidate, no-transform
Set-Cookie: i_like_gitea=43aab641717704c3; Path=/; HttpOnly; Secure; SameSite=Lax
Set-Cookie: _csrf=ag-60ZKG1hGUkrAA8UfiSXKVVf86MTc1MzI5ODA5MzU4MjM1NDk0Mw; Path=/; Max-Age=86400; HttpOnly; Secure; SameSite=Lax
X-Cache-Status: HIT
X-Cache-Age: 0

1e67
diff --git a/build/CMakeLists.txt b/build/CMakeLists.txt
index e7b5eb9a..8c8e75f0 100644
--- a/build/CMakeLists.txt
+++ b/build/CMakeLists.txt
@@ -26,6 +26,9 @@ option(WITH_WEBSOCKETS "Build with websocket ui" OFF)
 set ( CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake_modules" )
 set ( CMAKE_SOURCE_DIR ".." )
 
+# architecture
+target_architecture(ARCHITECTURE)
+
 set(LIBI2PD_SRC_DIR ../libi2pd)
 set(LIBI2PD_CLIENT_SRC_DIR ../libi2pd_client)
 
@@ -382,6 +385,12 @@ if (WITH_MESHNET)
   message(WARNING "This build will NOT work on mainline i2p")
 endif()
 
+if (ARCHITECTURE MATCHES "arm")
+  set(ATOMIC_LIB atomic)
+else()
+  set(ATMOIC_LIB "")
+endif()
+
 
 # show summary
 message(STATUS "---------------------------------------")
@@ -389,6 +398,7 @@ message(STATUS "Build type         : ${CMAKE_BUILD_TYPE}")
 message(STATUS "Compiler vendor    : ${CMAKE_CXX_COMPILER_ID}")
 message(STATUS "Compiler version   : ${CMAKE_CXX_COMPILER_VERSION}")
 message(STATUS "Compiler path      : ${CMAKE_CXX_COMPILER}")
+message(STATUS "Architecture       : ${ARCHITECTURE}")
 message(STATUS "Install prefix:    : ${CMAKE_INSTALL_PREFIX}")
 message(STATUS "Options:")
 message(STATUS "  AESNI            : ${WITH_AESNI}")
@@ -448,7 +458,7 @@ if (WITH_BINARY)
   if (WITH_STATIC)
     set(DL_LIB ${CMAKE_DL_LIBS})
   endif()
-  target_link_libraries( "${PROJECT_NAME}" libi2pd i2pdclient ${DL_LIB} ${Boost_LIBRARIES} ${OPENSSL_LIBRARIES} ${ZLIB_LIBRARY} ${CMAKE_THREAD_LIBS_INIT} ${MINGW_EXTRA} ${DL_LIB})
+  target_link_libraries( "${PROJECT_NAME}" libi2pd i2pdclient ${DL_LIB} ${Boost_LIBRARIES} ${OPENSSL_LIBRARIES} ${ZLIB_LIBRARY} ${CMAKE_THREAD_LIBS_INIT} ${MINGW_EXTRA} ${DL_LIB} ${ATOMIC_LIB})
 
   install(TARGETS "${PROJECT_NAME}" RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR} COMPONENT Runtime)
   set (APPS "\${CMAKE_INSTALL_PREFIX}/bin/${PROJECT_NAME}${CMAKE_EXECUTABLE_SUFFIX}")
diff --git a/build/cmake_modules/TargetArch.cmake b/build/cmake_modules/TargetArch.cmake
new file mode 100644
index 00000000..3761e4df
--- /dev/null
+++ b/build/cmake_modules/TargetArch.cmake
@@ -0,0 +1,134 @@
+# Based on the Qt 5 processor detection code, so should be very accurate
+# https://qt.gitorious.org/qt/qtbase/blobs/master/src/corelib/global/qprocessordetection.h
+# Currently handles arm (v5, v6, v7), x86 (32/64), ia64, and ppc (32/64)
+
+# Regarding POWER/PowerPC, just as is noted in the Qt source,
+# "There are many more known variants/revisions that we do not handle/detect."
+
+set(archdetect_c_code "
+#if defined(__arm__) || defined(__TARGET_ARCH_ARM)
+    #if defined(__ARM_ARCH_7__) \\
+        || defined(__ARM_ARCH_7A__) \\
+        || defined(__ARM_ARCH_7R__) \\
+        || defined(__ARM_ARCH_7M__) \\
+        || (defined(__TARGET_ARCH_ARM) && __TARGET_ARCH_ARM-0 >= 7)
+        #error cmake_ARCH armv7
+    #elif defined(__ARM_ARCH_6__) \\
+        || defined(__ARM_ARCH_6J__) \\
+        || defined(__ARM_ARCH_6T2__) \\
+        || defined(__ARM_ARCH_6Z__) \\
+        || defined(__ARM_ARCH_6K__) \\
+        || defined(__ARM_ARCH_6ZK__) \\
+        || defined(__ARM_ARCH_6M__) \\
+        || (defined(__TARGET_ARCH_ARM) && __TARGET_ARCH_ARM-0 >= 6)
+        #error cmake_ARCH armv6
+    #elif defined(__ARM_ARCH_5TEJ__) \\
+        || (defined(__TARGET_ARCH_ARM) && __TARGET_ARCH_ARM-0 >= 5)
+        #error cmake_ARCH armv5
+    #else
+        #error cmake_ARCH arm
+    #endif
+#elif defined(__i386) || defined(__i386__) || defined(_M_IX86)
+    #error cmake_ARCH i386
+#elif defined(__x86_64) || defined(__x86_64__) || defined(__amd64) || defined(_M_X64)
+    #error cmake_ARCH x86_64
+#elif defined(__ia64) || defi
0