Swift 5.5.3 patched for Armv5

swift-5.5.3-armv5.patch

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7a3cc3af07a..d99fbc56348 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -285,7 +285,7 @@ set(SWIFT_ANDROID_DEPLOY_DEVICE_PATH "" CACHE STRING
 #
 
 foreach(sdk ANDROID;FREEBSD;LINUX;WINDOWS;HAIKU;WASI)
-  foreach(arch aarch64;armv6;armv7;i686;powerpc64;powerpc64le;s390x;wasm32;x86_64)
+  foreach(arch aarch64;armv5;armv6;armv7;i686;powerpc64;powerpc64le;s390x;wasm32;x86_64)
     set(SWIFT_${sdk}_${arch}_ICU_UC "" CACHE STRING
         "Path to a directory containing the icuuc library for ${sdk}")
     set(SWIFT_${sdk}_${arch}_ICU_UC_INCLUDE "" CACHE STRING
@@ -636,6 +636,8 @@ else()
     set(SWIFT_HOST_VARIANT_ARCH_default "powerpc64le")
   elseif("${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "s390x")
     set(SWIFT_HOST_VARIANT_ARCH_default "s390x")
+  elseif("${CMAKE_SYSTEM_PROCESSOR}" MATCHES "armv5|armv5te")
+    set(SWIFT_HOST_VARIANT_ARCH_default "armv5")
   # FIXME: Only matches v6l/v7l - by far the most common variants
   elseif("${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "armv6l")
     set(SWIFT_HOST_VARIANT_ARCH_default "armv6")
diff --git a/cmake/modules/AddSwift.cmake b/cmake/modules/AddSwift.cmake
index f244b6b46f6..c22cac55546 100644
--- a/cmake/modules/AddSwift.cmake
+++ b/cmake/modules/AddSwift.cmake
@@ -301,7 +301,7 @@ function(_add_host_variant_link_flags target)
     target_link_libraries(${target} PRIVATE
       pthread
       dl)
-    if("${SWIFT_HOST_VARIANT_ARCH}" MATCHES "armv6|armv7|i686")
+    if("${SWIFT_HOST_VARIANT_ARCH}" MATCHES "armv5|armv6|armv7|i686")
       target_link_libraries(${target} PRIVATE atomic)
     endif()
   elseif(SWIFT_HOST_VARIANT_SDK STREQUAL FREEBSD)
diff --git a/cmake/modules/AddSwiftUnittests.cmake b/cmake/modules/AddSwiftUnittests.cmake
index 0690973abd3..640c4068a08 100644
--- a/cmake/modules/AddSwiftUnittests.cmake
+++ b/cmake/modules/AddSwiftUnittests.cmake
@@ -38,7 +38,7 @@ function(add_swift_unittest test_dirname)
     if(CMAKE_SYSTEM_PROCESSOR MATCHES "x86_64|AMD64")
       target_compile_options(${test_dirname} PRIVATE
         -march=core2)
-    elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "armv6|armv7|i686")
+    elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "armv5|armv6|armv7|i686")
       set_property(TARGET "${test_dirname}" APPEND PROPERTY LINK_LIBRARIES
         "atomic")
     endif()
diff --git a/cmake/modules/SwiftConfigureSDK.cmake b/cmake/modules/SwiftConfigureSDK.cmake
index 8a32c12abb1..01e830ae6aa 100644
--- a/cmake/modules/SwiftConfigureSDK.cmake
+++ b/cmake/modules/SwiftConfigureSDK.cmake
@@ -335,7 +335,9 @@ macro(configure_sdk_unix name architectures)
       endif()
 
       if("${prefix}" STREQUAL "LINUX")
-        if(arch MATCHES "(armv6|armv7)")
+        if(arch MATCHES "(armv5)")
+          set(SWIFT_SDK_LINUX_ARCH_${arch}_TRIPLE "${arch}-unknown-linux-gnueabi")
+        elseif(arch MATCHES "(armv6|armv7)")
           set(SWIFT_SDK_LINUX_ARCH_${arch}_TRIPLE "${arch}-unknown-linux-gnueabihf")
         elseif(arch MATCHES "(aarch64|i686|powerpc64|powerpc64le|s390x|x86_64)")
           set(SWIFT_SDK_LINUX_ARCH_${arch}_TRIPLE "${arch}-unknown-linux-gnu")
diff --git a/cmake/modules/SwiftSetIfArchBitness.cmake b/cmake/modules/SwiftSetIfArchBitness.cmake
index fa29d77fe26..74a43e33343 100644
--- a/cmake/modules/SwiftSetIfArchBitness.cmake
+++ b/cmake/modules/SwiftSetIfArchBitness.cmake
@@ -9,6 +9,7 @@ function(set_if_arch_bitness var_name)
   if("${SIA_ARCH}" STREQUAL "i386" OR
      "${SIA_ARCH}" STREQUAL "i686" OR
      "${SIA_ARCH}" STREQUAL "x86" OR
+     "${SIA_ARCH}" STREQUAL "armv5" OR
      "${SIA_ARCH}" STREQUAL "armv6" OR
      "${SIA_ARCH}" STREQUAL "armv7" OR
      "${SIA_ARCH}" STREQUAL "armv7k" OR
diff --git a/lib/Basic/Platform.cpp b/lib/Basic/Platform.cpp
index bd1fce5423a..b32539a8c5c 100644
--- a/lib/Basic/Platform.cpp
+++ b/lib/Basic/Platform.cpp
@@ -218,6 +218,8 @@ StringRef swift::getMajorArchitectureName(const llvm::Triple &Triple) {
       return "armv7";
     case llvm::Triple::SubArchType::ARMSubArch_v6:
       return "armv6";
+    case llvm::Triple::SubArchType::ARMSubArch_v5:
+      return "armv5";
     default:
       break;
     }
diff --git a/lib/IDE/Utils.cpp b/lib/IDE/Utils.cpp
index 9ddb31de194..2878dbdb534 100644
--- a/lib/IDE/Utils.cpp
+++ b/lib/IDE/Utils.cpp
@@ -393,6 +393,10 @@ static std::string adjustClangTriple(StringRef TripleStr) {
     OS << "armv6k"; break;
   case llvm::Triple::SubArchType::ARMSubArch_v6t2:
     OS << "armv6t2"; break;
+  case llvm::Triple::SubArchType::ARMSubArch_v5:
+    OS << "armv5"; break;
+  case llvm::Triple::SubArchType::ARMSubArch_v5te:
+    OS << "armv5te"; break;
   default:
     // Adjust i386-macosx to x86_64 because there is no Swift stdlib for i386.
     if ((Triple.getOS() == llvm::Triple::MacOSX ||
diff --git a/stdlib/cmake/modules/AddSwiftStdlib.cmake b/stdlib/cmake/modules/AddSwiftStdlib.cmake
index fac9eec3f35..014526d4054 100644
--- a/stdlib/cmake/modules/AddSwiftStdlib.cmake
+++ b/stdlib/cmake/modules/AddSwiftStdlib.cmake
@@ -358,7 +358,7 @@ function(_add_target_variant_link_flags)
     MACCATALYST_BUILD_FLAVOR  "${LFLAGS_MACCATALYST_BUILD_FLAVOR}")
   if("${LFLAGS_SDK}" STREQUAL "LINUX")
     list(APPEND link_libraries "pthread" "dl")
-    if("${SWIFT_HOST_VARIANT_ARCH}" MATCHES "armv6|armv7|i686")
+    if("${SWIFT_HOST_VARIANT_ARCH}" MATCHES "armv5|armv6|armv7|i686")
       list(APPEND link_libraries PRIVATE "atomic")
     endif()
   elseif("${LFLAGS_SDK}" STREQUAL "FREEBSD")
diff --git a/utils/build-script-impl b/utils/build-script-impl
index aa72cfbf06d..c0838ae3198 100755
--- a/utils/build-script-impl
+++ b/utils/build-script-impl
@@ -415,6 +415,7 @@ function verify_host_is_supported() {
       | haiku-x86_64            \
       | linux-x86_64            \
       | linux-i686              \
+      | linux-armv5             \
       | linux-armv6             \
       | linux-armv7             \
       | linux-aarch64           \
@@ -507,6 +508,10 @@ function set_build_options_for_host() {
                     ;;
             esac
             ;;
+        linux-armv5)
+            SWIFT_HOST_TRIPLE="armv5-unknown-linux-gnueabi"
+            llvm_target_arch="ARM"
+            ;;
         linux-armv6)
             SWIFT_HOST_TRIPLE="armv6-unknown-linux-gnueabihf"
             llvm_target_arch="ARM"
@@ -1052,7 +1057,7 @@ function false_true() {
 CROSS_COMPILE_HOSTS=($CROSS_COMPILE_HOSTS)
 for t in "${CROSS_COMPILE_HOSTS[@]}"; do
     case ${t} in
-        macosx-arm64* | iphone* | appletv* | watch* | linux-armv6 | linux-armv7 | android-* )
+        macosx-arm64* | iphone* | appletv* | watch* | linux-armv5 | linux-armv6 | linux-armv7 | android-* )
             ;;
         *)
             echo "Unknown host to cross-compile for: ${t}"
diff --git a/utils/swift_build_support/swift_build_support/targets.py b/utils/swift_build_support/swift_build_support/targets.py
index 2cb86fb3571..d540570ea91 100644
--- a/utils/swift_build_support/swift_build_support/targets.py
+++ b/utils/swift_build_support/swift_build_support/targets.py
@@ -224,6 +224,7 @@ class StdlibDeploymentTarget(object):
     Linux = Platform("linux", archs=[
         "x86_64",
         "i686",
+        "armv5",
         "armv6",
         "armv7",
         "aarch64",
@@ -301,6 +302,9 @@ class StdlibDeploymentTarget(object):
             elif machine.startswith('armv6'):
                 # linux-armv6* is canonicalized to 'linux-armv6'
                 return StdlibDeploymentTarget.Linux.armv6
+            elif machine.startswith('armv5'):
+                # linux-armv5* is canonicalized to 'linux-armv5'
+                return StdlibDeploymentTarget.Linux.armv5
             elif machine == 'aarch64':
                 return StdlibDeploymentTarget.Linux.aarch64
             elif machine == 'ppc64':