utils: support building android SDKs on Windows

cmake/caches/Runtime-Android-i686.cmake

@@ -0,0 +1,24 @@
+
+set(SWIFT_HOST_VARIANT_SDK ANDROID CACHE STRING "")
+set(SWIFT_HOST_VARIANT_ARCH i686 CACHE STRING "")
+
+# NOTE(compnerd) disable the tools, we are trying to build just the standard
+# library.
+set(SWIFT_INCLUDE_TOOLS NO CACHE BOOL "")
+
+# NOTE(compnerd) cannot build tests since the tests require the toolchain
+set(SWIFT_INCLUDE_TESTS NO CACHE BOOL "")
+
+# NOTE(compnerd) cannot build docs since that requires perl
+set(SWIFT_INCLUDE_DOCS NO CACHE BOOL "")
+
+# NOTE(compnerd) these are part of the toolchain, not the runtime.
+set(SWIFT_BUILD_SOURCEKIT NO CACHE BOOL "")
+
+# NOTE(compnerd) build with the compiler specified, not a just built compiler.
+set(SWIFT_BUILD_RUNTIME_WITH_HOST_COMPILER YES CACHE BOOL "")
+
+set(SWIFT_SDK_ANDROID_ARCHITECTURES i686 CACHE STRING "")
+
+# NOTE(compnerd) this is lollipop, which seems to still have decent usage.
+set(SWIFT_ANDROID_API_LEVEL 21 CACHE STRING "")

cmake/caches/Runtime-Android-x86_64.cmake

@@ -0,0 +1,24 @@
+
+set(SWIFT_HOST_VARIANT_SDK ANDROID CACHE STRING "")
+set(SWIFT_HOST_VARIANT_ARCH x86_64 CACHE STRING "")
+
+# NOTE(compnerd) disable the tools, we are trying to build just the standard
+# library.
+set(SWIFT_INCLUDE_TOOLS NO CACHE BOOL "")
+
+# NOTE(compnerd) cannot build tests since the tests require the toolchain
+set(SWIFT_INCLUDE_TESTS NO CACHE BOOL "")
+
+# NOTE(compnerd) cannot build docs since that requires perl
+set(SWIFT_INCLUDE_DOCS NO CACHE BOOL "")
+
+# NOTE(compnerd) these are part of the toolchain, not the runtime.
+set(SWIFT_BUILD_SOURCEKIT NO CACHE BOOL "")
+
+# NOTE(compnerd) build with the compiler specified, not a just built compiler.
+set(SWIFT_BUILD_RUNTIME_WITH_HOST_COMPILER YES CACHE BOOL "")
+
+set(SWIFT_SDK_ANDROID_ARCHITECTURES x86_64 CACHE STRING "")
+
+# NOTE(compnerd) this is lollipop, which seems to still have decent usage.
+set(SWIFT_ANDROID_API_LEVEL 21 CACHE STRING "")

stdlib/cmake/modules/AddSwiftStdlib.cmake

@@ -541,13 +541,16 @@ function(_add_target_variant_link_flags)
     list(APPEND link_libraries "dl" "log")
     # We need to add the math library, which is linked implicitly by libc++
     list(APPEND result "-lm")
-    if(NOT "${SWIFT_ANDROID_NDK_PATH}" STREQUAL "")
-      if("${SWIFT_ANDROID_NDK_PATH}" MATCHES "r26")
-        file(GLOB RESOURCE_DIR ${SWIFT_SDK_ANDROID_ARCH_${LFLAGS_ARCH}_PATH}/../lib/clang/*)
-      else()
-        file(GLOB RESOURCE_DIR ${SWIFT_SDK_ANDROID_ARCH_${LFLAGS_ARCH}_PATH}/../lib64/clang/*)
+    if(NOT CMAKE_HOST_SYSTEM MATCHES Windows)
+      # The Android resource dir is specified from build.ps1 on windows.
+      if(NOT "${SWIFT_ANDROID_NDK_PATH}" STREQUAL "")
+        if("${SWIFT_ANDROID_NDK_PATH}" MATCHES "r26")
+          file(GLOB RESOURCE_DIR ${SWIFT_SDK_ANDROID_ARCH_${LFLAGS_ARCH}_PATH}/../lib/clang/*)
+        else()
+          file(GLOB RESOURCE_DIR ${SWIFT_SDK_ANDROID_ARCH_${LFLAGS_ARCH}_PATH}/../lib64/clang/*)
+        endif()
+        list(APPEND result "-resource-dir=${RESOURCE_DIR}")
       endif()
-      list(APPEND result "-resource-dir=${RESOURCE_DIR}")
     endif()
 
     # link against the custom C++ library
@@ -3062,9 +3065,14 @@ function(add_swift_target_executable name)
       # it tries to build swift-backtrace it fails because *the compiler*
       # refers to a libswiftCore.so that can't be found.
 
+      if(SWIFTEXE_TARGET_NOSWIFTRT)
+        set(NOSWIFTRT_KEYWORD "NOSWIFTRT")
+      else()
+        set(NOSWIFTRT_KEYWORD "")
+      endif()
       _add_swift_target_executable_single(
           ${VARIANT_NAME}
-          ${SWIFTEXE_TARGET_NOSWIFTRT_keyword}
+          ${NOSWIFTRT_KEYWORD}
           ${SWIFTEXE_TARGET_SOURCES}
           DEPENDS
             ${SWIFTEXE_TARGET_DEPENDS_with_suffix}

stdlib/public/ClangOverlays/CMakeLists.txt

@@ -1,17 +1,19 @@
-add_swift_target_library(swift_Builtin_float
-    ${SWIFT_STDLIB_LIBRARY_BUILD_TYPES}
-    IS_SDK_OVERLAY
+if(NOT DEFINED SWIFT_BUILD_CLANG_OVERLAYS_SKIP_BUILTIN_FLOAT OR NOT SWIFT_BUILD_CLANG_OVERLAYS_SKIP_BUILTIN_FLOAT)
+  add_swift_target_library(swift_Builtin_float
+      ${SWIFT_STDLIB_LIBRARY_BUILD_TYPES}
+      IS_SDK_OVERLAY
 
-    GYB_SOURCES
-      float.swift.gyb
+      GYB_SOURCES
+        float.swift.gyb
 
-    SWIFT_COMPILE_FLAGS
-      ${SWIFT_RUNTIME_SWIFT_COMPILE_FLAGS}
-      ${SWIFT_STANDARD_LIBRARY_SWIFT_FLAGS}
-      -Xfrontend -previous-module-installname-map-file -Xfrontend "${SWIFT_SOURCE_DIR}/stdlib/linker-support/previous-module-installname.json"
+      SWIFT_COMPILE_FLAGS
+        ${SWIFT_RUNTIME_SWIFT_COMPILE_FLAGS}
+        ${SWIFT_STANDARD_LIBRARY_SWIFT_FLAGS}
+        -Xfrontend -previous-module-installname-map-file -Xfrontend "${SWIFT_SOURCE_DIR}/stdlib/linker-support/previous-module-installname.json"
 
-    LINK_FLAGS
-      ${SWIFT_RUNTIME_SWIFT_LINK_FLAGS}
+      LINK_FLAGS
+        ${SWIFT_RUNTIME_SWIFT_LINK_FLAGS}
 
-    INSTALL_IN_COMPONENT stdlib
-    MACCATALYST_BUILD_FLAVOR zippered)
+      INSTALL_IN_COMPONENT stdlib
+      MACCATALYST_BUILD_FLAVOR zippered)
+endif()

stdlib/public/Concurrency/DispatchGlobalExecutor.inc

@@ -42,13 +42,17 @@ struct MinimalDispatchObjectHeader {
   int Opaque1;
   void *Linkage;
 };
+
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wgnu-offsetof-extensions"
 static_assert(
     offsetof(Job, metadata) == offsetof(MinimalDispatchObjectHeader, VTable),
     "Job Metadata field must match location of Dispatch VTable field.");
 static_assert(offsetof(Job, SchedulerPrivate[Job::DispatchLinkageIndex]) ==
                   offsetof(MinimalDispatchObjectHeader, Linkage),
               "Dispatch Linkage field must match Job "
               "SchedulerPrivate[DispatchLinkageIndex].");
+#pragma clang diagnostic pop
 
 /// The function passed to dispatch_async_f to execute a job.
 static void __swift_run_job(void *_job) {

stdlib/public/core/CMakeLists.txt

@@ -262,8 +262,8 @@ if(SWIFT_STDLIB_ENABLE_VECTOR_TYPES)
   list(APPEND SWIFTLIB_EMBEDDED_GYB_SOURCES SIMDConcreteOperations.swift.gyb SIMDVectorTypes.swift.gyb)
 endif()
 
-# Freestanding and Linux builds both have failures to resolve.
-if(NOT BOOTSTRAPPING_MODE STREQUAL "OFF" AND NOT SWIFT_FREESTANDING_FLAVOR AND NOT SWIFT_HOST_VARIANT_SDK STREQUAL "LINUX")
+# Freestanding and Linux/Android builds both have failures to resolve.
+if(NOT BOOTSTRAPPING_MODE STREQUAL "OFF" AND NOT SWIFT_FREESTANDING_FLAVOR AND NOT SWIFT_HOST_VARIANT_SDK STREQUAL "LINUX" AND NOT SWIFT_HOST_VARIANT_SDK STREQUAL "ANDROID")
   list(APPEND SWIFTLIB_SOURCES ObjectIdentifier+DebugDescription.swift)
 endif()
 

stdlib/tools/swift-reflection-test/CMakeLists.txt

@@ -1,4 +1,5 @@
 add_swift_target_executable(swift-reflection-test BUILD_WITH_STDLIB
+  NOSWIFTRT
   swift-reflection-test.c
   overrides.c
   LINK_LIBRARIES