Fix winarm64 crossdac build (#112594)

#112256 added the ability to cross compile android on windows. This
regressed the win-arm64 crossdac build because it stopped passing CMAKE_TARGET_ARCH and CMAKE_TARGET_OS for
cross component builds where the host and target os's match.

This change makes sure the cmake variables are passed in all cases.

Author: steveisok

eng/native/configureplatform.cmake

@@ -499,7 +499,7 @@ if(NOT CLR_CMAKE_TARGET_BROWSER AND NOT CLR_CMAKE_TARGET_WASI)
     set(CMAKE_POSITION_INDEPENDENT_CODE ON)
 endif()
 
-if (CLR_CMAKE_TARGET_ANDROID)
+if (CLR_CMAKE_HOST_ANDROID)
     # Google requires all the native libraries to be aligned to 16 bytes (for 16k memory page size)
     # This applies only to 64-bit binaries
     if(CLR_CMAKE_TARGET_ARCH_ARM64 OR CLR_CMAKE_TARGET_ARCH_AMD64)

src/coreclr/build-runtime.cmd

@@ -392,9 +392,17 @@ if %__BuildNative% EQU 1 (
         set __ExtraCmakeArgs="-DCMAKE_BUILD_TYPE=!__BuildType!"
     )
 
-    set __ExtraCmakeArgs=!__ExtraCmakeArgs! "-DCLR_CMAKE_TARGET_ARCH=%__TargetArch%" "-DCLR_CMAKE_TARGET_OS=%__TargetOS%" "-DCLI_CMAKE_FALLBACK_OS=%__HostFallbackOS%" "-DCLR_CMAKE_PGO_INSTRUMENT=%__PgoInstrument%" "-DCLR_CMAKE_OPTDATA_PATH=%__PgoOptDataPath%" "-DCLR_CMAKE_PGO_OPTIMIZE=%__PgoOptimize%" %__CMakeArgs%
-    echo Calling "%__RepoRootDir%\eng\native\gen-buildsys.cmd" "%__ProjectDir%" "%__IntermediatesDir%" %__VSVersion% %__HostArch% %__TargetOS% !__ExtraCmakeArgs!
-    call "%__RepoRootDir%\eng\native\gen-buildsys.cmd" "%__ProjectDir%" "%__IntermediatesDir%" %__VSVersion% %__HostArch% %__TargetOS% !__ExtraCmakeArgs!
+    set __ExtraCmakeArgs=!__ExtraCmakeArgs! "-DCLR_CMAKE_TARGET_ARCH=%__TargetArch%" "-DCLR_CMAKE_TARGET_OS=%__TargetOS%"
+    set __ExtraCmakeArgs=!__ExtraCmakeArgs! "-DCLI_CMAKE_FALLBACK_OS=%__HostFallbackOS%" "-DCLR_CMAKE_PGO_INSTRUMENT=%__PgoInstrument%" "-DCLR_CMAKE_OPTDATA_PATH=%__PgoOptDataPath%" "-DCLR_CMAKE_PGO_OPTIMIZE=%__PgoOptimize%"
+
+    if "%__HostOS%" == "" (
+        set "__HostOS=!__TargetOS!"
+    )
+
+    set __ExtraCmakeArgs=!__ExtraCmakeArgs! %__CMakeArgs%
+    
+    echo Calling "%__RepoRootDir%\eng\native\gen-buildsys.cmd" "%__ProjectDir%" "%__IntermediatesDir%" %__VSVersion% %__HostArch% !__HostOS! !__ExtraCmakeArgs!
+    call "%__RepoRootDir%\eng\native\gen-buildsys.cmd" "%__ProjectDir%" "%__IntermediatesDir%" %__VSVersion% %__HostArch% !__HostOS! !__ExtraCmakeArgs!
     if not !errorlevel! == 0 (
         echo %__ErrMsgPrefix%%__MsgPrefix%Error: failed to generate native component build project!
         goto ExitWithError

src/coreclr/jit/CMakeLists.txt

@@ -504,7 +504,7 @@ endif()
 
 set(JIT_DLL_MAIN_FILE ${CMAKE_CURRENT_LIST_DIR}/dllmain.cpp)
 
-if(CLR_CMAKE_TARGET_WIN32)
+if(CLR_CMAKE_HOST_WIN32)
   set(CLRJIT_EXPORTS ${CMAKE_CURRENT_LIST_DIR}/ClrJit.exports)
   set(JIT_EXPORTS_FILE ${CMAKE_CURRENT_BINARY_DIR}/ClrJit.exports.def)
   preprocess_file (${CLRJIT_EXPORTS} ${JIT_EXPORTS_FILE})