Revert "Build an apphost with hostfxr and hostpolicy linked in (#35368)"

eng/SignCheckExclusionsFile.txt

@@ -7,7 +7,6 @@
 ;; and SCD apps. If they are signed, the file that the SDK produces has an invalid signature and
 ;; can't be signed again. More info at https://github.com/dotnet/core-setup/pull/7549.
 *apphost.exe;;Template, https://github.com/dotnet/core-setup/pull/7549
-*singlefilehost.exe;;Template, https://github.com/dotnet/core-setup/pull/7549
 *comhost.dll;;Template, https://github.com/dotnet/core-setup/pull/7549
 *apphosttemplateapphostexe.exe;;Template, https://github.com/dotnet/core-setup/pull/7549
 *comhosttemplatecomhostdll.dll;;Template, https://github.com/dotnet/core-setup/pull/7549

eng/Signing.props

@@ -24,7 +24,7 @@
     <BundleInstallerExeArtifact Include="$(ArtifactsPackagesDir)**/*.exe" />
 
     <!-- apphost and comhost template files are not signed, by design. -->
-    <FileSignInfo Include="apphost.exe;singlefilehost.exe;comhost.dll" CertificateName="None" />
+    <FileSignInfo Include="apphost.exe;comhost.dll" CertificateName="None" />
   </ItemGroup>
 
   <ItemGroup Condition="'$(CrossTargetComponentFolder)' != ''">

eng/native/functions.cmake

@@ -175,8 +175,8 @@ function(generate_exports_file)
 
   add_custom_command(
     OUTPUT ${outputFilename}
-    COMMAND ${AWK} -f ${CLR_ENG_NATIVE_DIR}/${AWK_SCRIPT} ${INPUT_LIST} >${outputFilename}
-    DEPENDS ${INPUT_LIST} ${CLR_ENG_NATIVE_DIR}/${AWK_SCRIPT}
+    COMMAND ${AWK} -f ${CMAKE_SOURCE_DIR}/${AWK_SCRIPT} ${INPUT_LIST} >${outputFilename}
+    DEPENDS ${INPUT_LIST} ${CMAKE_SOURCE_DIR}/${AWK_SCRIPT}
     COMMENT "Generating exports file ${outputFilename}"
   )
   set_source_files_properties(${outputFilename}
@@ -196,8 +196,8 @@ function(generate_exports_file_prefix inputFilename outputFilename prefix)
 
   add_custom_command(
     OUTPUT ${outputFilename}
-    COMMAND ${AWK} -f ${CLR_ENG_NATIVE_DIR}/${AWK_SCRIPT} ${AWK_VARS} ${inputFilename} >${outputFilename}
-    DEPENDS ${inputFilename} ${CLR_ENG_NATIVE_DIR}/${AWK_SCRIPT}
+    COMMAND ${AWK} -f ${CMAKE_SOURCE_DIR}/${AWK_SCRIPT} ${AWK_VARS} ${inputFilename} >${outputFilename}
+    DEPENDS ${inputFilename} ${CMAKE_SOURCE_DIR}/${AWK_SCRIPT}
     COMMENT "Generating exports file ${outputFilename}"
   )
   set_source_files_properties(${outputFilename}

src/installer/corehost/cli/CMakeLists.txt

@@ -1,10 +1,10 @@
 add_subdirectory(hostcommon)
 add_subdirectory(apphost)
 add_subdirectory(dotnet)
-add_subdirectory(nethost)
-add_subdirectory(test_fx_ver)
 add_subdirectory(fxr)
 add_subdirectory(hostpolicy)
+add_subdirectory(nethost)
+add_subdirectory(test_fx_ver)
 
 add_subdirectory(test)
 

src/installer/corehost/cli/apphost/CMakeLists.txt

@@ -2,5 +2,49 @@
 # The .NET Foundation licenses this file to you under the MIT license.
 # See the LICENSE file in the project root for more information.
 
-add_subdirectory(static)
-add_subdirectory(standalone)
+project(apphost)
+set(DOTNET_PROJECT_NAME "apphost")
+
+# Add RPATH to the apphost binary that allows using local copies of shared libraries
+# dotnet core depends on for special scenarios when system wide installation of such
+# dependencies is not possible for some reason.
+# This cannot be enabled for MacOS (Darwin) since its RPATH works in a different way,
+# doesn't apply to libraries loaded via dlopen and most importantly, it is not transitive.
+if (NOT CLR_CMAKE_TARGET_OSX)
+    set(CMAKE_BUILD_WITH_INSTALL_RPATH TRUE)
+    set(CMAKE_INSTALL_RPATH "\$ORIGIN/netcoredeps")
+endif()
+
+set(SKIP_VERSIONING 1)
+
+set(SOURCES
+    ./bundle_marker.cpp
+)
+
+set(HEADERS
+    ./bundle_marker.h
+)
+
+if(CLR_CMAKE_TARGET_WIN32)
+    list(APPEND SOURCES
+        apphost.windows.cpp)
+
+    list(APPEND HEADERS
+        apphost.windows.h)
+endif()
+
+include(../exe.cmake)
+
+add_definitions(-DFEATURE_APPHOST=1)
+
+# Disable manifest generation into the file .exe on Windows
+if(CLR_CMAKE_TARGET_WIN32)
+    set_property(TARGET ${PROJECT_NAME} PROPERTY
+            LINK_FLAGS "/MANIFEST:NO"
+        )
+endif()
+
+# Specify non-default Windows libs to be used for Arm/Arm64 builds
+if (CLR_CMAKE_TARGET_WIN32 AND (CLR_CMAKE_TARGET_ARCH_ARM OR CLR_CMAKE_TARGET_ARCH_ARM64))
+    target_link_libraries(apphost Advapi32.lib shell32.lib)
+endif()