Rewrite the corehost CMake system to be more "Modern CMake"y and less MSBuild-y

src/coreclr/CMakeLists.txt

@@ -61,7 +61,10 @@ include(components.cmake)
 #---------------------------
 if(NOT CLR_CROSS_COMPONENTS_BUILD)
   set(CLR_SINGLE_FILE_HOST_ONLY 1)
+  configure_file(${CLR_SRC_NATIVE_DIR}/corehost/configure.h.in ${GENERATED_INCLUDE_DIR}/corehost/configure.h)
   add_subdirectory(${CLR_SRC_NATIVE_DIR}/corehost/apphost/static Corehost.Static)
+  target_include_directories(singlefilehost PRIVATE ${GENERATED_INCLUDE_DIR}/corehost)
+  target_include_directories(hostmisc PRIVATE ${GENERATED_INCLUDE_DIR}/corehost)
   add_dependencies(runtime singlefilehost)
 endif()
 #-------------------------

src/native/corehost/CMakeLists.txt

@@ -4,6 +4,8 @@ project(corehost)
 include(../../../eng/native/configurepaths.cmake)
 include(${CLR_ENG_NATIVE_DIR}/configurecompiler.cmake)
 
+set(COREHOST_ROOT_DIR "${CMAKE_CURRENT_SOURCE_DIR}")
+
 if (MSVC)
     # Host components don't try to handle asynchronous exceptions
     set_property(DIRECTORY PROPERTY CLR_EH_OPTION /EHsc)
@@ -19,7 +21,64 @@ elseif (CMAKE_CXX_COMPILER_ID MATCHES GNU)
     add_compile_options($<$<COMPILE_LANGUAGE:CXX>:-fno-use-cxa-atexit>)
 endif()
 
+set(CMAKE_INCLUDE_CURRENT_DIR ON)
+include_directories(${CMAKE_CURRENT_BINARY_DIR})
+include_directories(${CMAKE_CURRENT_SOURCE_DIR})
+include_directories(${CLR_ARTIFACTS_OBJ_DIR}) # Generated version files
+
+if (NOT ${CLR_SINGLE_FILE_HOST_ONLY})
+    if("${CLI_CMAKE_PKG_RID}" STREQUAL "")
+        message(FATAL_ERROR "A minimum supported package rid is not specified (ex: win7-x86 or ubuntu.14.04-x64, osx.10.12-x64, rhel.7-x64)")
+    endif()
+    if("${CLI_CMAKE_COMMIT_HASH}" STREQUAL "")
+        message(FATAL_ERROR "Commit hash needs to be specified to build the host")
+    endif()
+endif()
+
+if("${CLI_CMAKE_FALLBACK_OS}" STREQUAL "")
+    message(FATAL_ERROR "Fallback rid needs to be specified to build the host")
+endif()
+
+if("${CLI_CMAKE_FALLBACK_OS}" STREQUAL "${CLR_CMAKE_TARGET_OS}")
+    add_definitions(-DFALLBACK_OS_IS_SAME_AS_TARGET_OS)
+endif()
+
+# Find support libraries that we need if they're present on the system.
+find_library(PTHREAD_LIB pthread)
+find_library(ATOMIC_SUPPORT_LIB atomic)
+
+configure_file(configure.h.in ${CMAKE_CURRENT_BINARY_DIR}/configure.h)
+
+# add_resources_to_target(targetName [resourceDirName])
+function(add_resources_to_target targetName)
+    set(RESOURCE_INCLUDE_DIR ${targetName})
+    if (${ARGC} GREATER 1)
+        set(RESOURCE_INCLUDE_DIR ${ARGV1})
+    endif()
+
+    if (CLR_CMAKE_TARGET_WIN32)
+        target_sources(${targetName} PRIVATE ${CMAKE_CURRENT_FUNCTION_LIST_DIR}/native.rc)
+        set_property(SOURCE ${CMAKE_CURRENT_FUNCTION_LIST_DIR}/native.rc
+            TARGET_DIRECTORY ${targetName}
+            APPEND PROPERTY INCLUDE_DIRECTORIES
+            ${CLI_CMAKE_RESOURCE_DIR}/${RESOURCE_INCLUDE_DIR})
+    else()
+        target_sources(${targetName} PRIVATE ${VERSION_FILE_PATH})
+    endif()
+endfunction()
+
+# This is required to map a symbol reference to a matching definition local to the module (.so)
+# containing the reference instead of using definitions from other modules.
+if(CLR_CMAKE_TARGET_LINUX OR CLR_CMAKE_TARGET_SUNOS)
+    add_link_options(LINKER:-Bsymbolic)
+endif()
+
+add_library(fxr_resolver INTERFACE)
+target_sources(fxr_resolver INTERFACE fxr_resolver.cpp)
+target_include_directories(fxr_resolver INTERFACE fxr)
+
 add_subdirectory(hostcommon)
+add_subdirectory(hostmisc)
 add_subdirectory(fxr)
 add_subdirectory(hostpolicy)
 

src/native/corehost/apphost/standalone/CMakeLists.txt

@@ -1,9 +1,6 @@
 # Licensed to the .NET Foundation under one or more agreements.
 # The .NET Foundation licenses this file to you under the MIT license.
 
-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.
@@ -14,13 +11,12 @@ if (NOT CLR_CMAKE_TARGET_OSX)
     set(CMAKE_INSTALL_RPATH "\$ORIGIN/netcoredeps")
 endif()
 
-set(SKIP_VERSIONING 1)
-
 include_directories(..)
 
 set(SOURCES
     ../bundle_marker.cpp
     ./hostfxr_resolver.cpp
+    ../../corehost.cpp
 )
 
 set(HEADERS
@@ -29,28 +25,39 @@ set(HEADERS
 )
 
 if(CLR_CMAKE_TARGET_WIN32)
-    add_definitions(-DUNICODE)
+    add_compile_definitions(UNICODE)
     list(APPEND SOURCES
         ../apphost.windows.cpp)
 
     list(APPEND HEADERS
         ../apphost.windows.h)
 endif()
 
-include(../../exe.cmake)
+if(CLR_CMAKE_TARGET_WIN32)
+    list(APPEND SOURCES ${HEADERS})
+endif()
+
+add_compile_definitions(FEATURE_APPHOST)
+
+add_executable(apphost ${SOURCES} ${RESOURCES})
+
+target_link_libraries(apphost PRIVATE hostmisc fxr_resolver)
+
+add_sanitizer_runtime_support(apphost)
+
+if(NOT CLR_CMAKE_TARGET_WIN32)
+    disable_pax_mprotect(apphost)
+endif()
 
-add_definitions(-DFEATURE_APPHOST=1)
+install_with_stripped_symbols(apphost TARGETS corehost)
 
 # Disable manifest generation into the file .exe on Windows
 if(CLR_CMAKE_TARGET_WIN32)
-    set_property(TARGET ${PROJECT_NAME} PROPERTY
-            LINK_FLAGS "/MANIFEST:NO"
-        )
+    add_link_options(apphost PRIVATE "/MANIFEST:NO")
 endif()
 
-# Specify non-default Windows libs to be used for Arm64 builds
-if (CLR_CMAKE_TARGET_WIN32 AND CLR_CMAKE_TARGET_ARCH_ARM64)
-    target_link_libraries(apphost PRIVATE shell32.lib)
+if (CLR_CMAKE_TARGET_WIN32)
+    target_link_libraries(apphost PRIVATE shell32)
 endif()
 
 if (CLR_CMAKE_HOST_APPLE)

src/native/corehost/apphost/static/CMakeLists.txt

@@ -14,29 +14,32 @@ if (NOT CLR_CMAKE_TARGET_APPLE)
     set(CMAKE_INSTALL_RPATH "\$ORIGIN/netcoredeps")
 endif()
 
-set(SKIP_VERSIONING 1)
-
 include_directories(..)
+include_directories(../..)
+include_directories(../../hostmisc)
 include_directories(../../json)
 include_directories(${CLR_SRC_NATIVE_DIR}/libs/System.IO.Compression.Native)
 include_directories(${CLR_SRC_NATIVE_DIR}/libs/Common)
+include_directories(${CLR_ARTIFACTS_OBJ_DIR}) # Generated version files
+
+add_subdirectory(../../hostmisc hostmisc)
 
 set(SOURCES
     ../bundle_marker.cpp
     ./hostfxr_resolver.cpp
     ./hostpolicy_resolver.cpp
     ../../hostpolicy/static/coreclr_resolver.cpp
+    ../../fxr_resolver.cpp
+    ../../corehost.cpp
 )
 
 set(HEADERS
     ../bundle_marker.h
     ../../hostfxr_resolver.h
+    ../../fxr_resolver.h
 )
 
-add_definitions(-D_NO_ASYNCRTIMP)
-add_definitions(-D_NO_PPLXIMP)
-remove_definitions(-DEXPORT_SHARED_API)
-add_definitions(-DNATIVE_LIBS_EMBEDDED)
+add_compile_definitions(NATIVE_LIBS_EMBEDDED)
 
 include(../../fxr/files.cmake)
 include(../../hostpolicy/files.cmake)
@@ -45,14 +48,15 @@ include(../../hostcommon/files.cmake)
 if(MSVC)
     # Host components don't try to handle asynchronous exceptions
     set_property(DIRECTORY PROPERTY CLR_EH_OPTION /EHsc)
+    set_property(TARGET hostmisc PROPERTY CLR_EH_OPTION /EHsc)
 elseif (CMAKE_CXX_COMPILER_ID MATCHES GNU)
     # Prevents libc from calling pthread_cond_destroy on static objects in
     # dlopen()'ed library which we dlclose() in pal::unload_library.
     add_compile_options($<$<COMPILE_LANGUAGE:CXX>:-fno-use-cxa-atexit>)
 endif()
 
 if(CLR_CMAKE_TARGET_WIN32)
-    add_definitions(-DUNICODE)
+    add_compile_definitions(UNICODE)
     list(APPEND SOURCES
         ../apphost.windows.cpp
         ${CLR_SRC_NATIVE_DIR}/libs/Common/delayloadhook_windows.cpp
@@ -78,11 +82,16 @@ else()
     set_exports_linker_option(${EXPORTS_FILE})
 endif()
 
-if (CLR_SINGLE_FILE_HOST_ONLY)
-    set(ADDITIONAL_INSTALL_ARGUMENTS COMPONENT runtime)
+add_executable(singlefilehost ${SOURCES})
+
+add_sanitizer_runtime_support(singlefilehost)
+
+if(NOT CLR_CMAKE_TARGET_WIN32)
+    disable_pax_mprotect(singlefilehost)
 endif()
 
-include(../../exe.cmake)
+install_with_stripped_symbols(singlefilehost TARGETS corehost COMPONENT runtime)
+
 include(configure.cmake)
 
 if(CLR_CMAKE_HOST_UNIX)
@@ -262,4 +271,6 @@ target_link_libraries(
     ${END_WHOLE_ARCHIVE}
 )
 
+target_link_libraries(singlefilehost PRIVATE hostmisc)
+
 add_sanitizer_runtime_support(singlefilehost)

src/native/corehost/comhost/CMakeLists.txt

@@ -1,18 +1,12 @@
 # Licensed to the .NET Foundation under one or more agreements.
 # The .NET Foundation licenses this file to you under the MIT license.
 
-project(comhost)
-
-set(DOTNET_PROJECT_NAME "comhost")
-
 # Include directories
-include_directories(../fxr)
 include_directories(../json)
 
 # CMake does not recommend using globbing since it messes with the freshness checks
 set(SOURCES
     comhost.cpp
-    ../fxr_resolver.cpp
     clsidmap.cpp
     ../redirected_error_writer.cpp
 )
@@ -26,9 +20,12 @@ if(CLR_CMAKE_TARGET_WIN32)
         Exports.def)
 endif()
 
-include(../lib.cmake)
+add_compile_definitions(FEATURE_LIBHOST)
+add_compile_definitions(EXPORT_SHARED_API)
+
+add_library(comhost SHARED ${SOURCES})
 
-add_definitions(-DFEATURE_LIBHOST=1)
+add_resources_to_target(comhost)
 
 if (CLR_CMAKE_TARGET_WIN32)
     set(WINLIBS wintrust.lib)
@@ -42,4 +39,4 @@ if (CLR_CMAKE_TARGET_WIN32)
 endif()
 
 install_with_stripped_symbols(comhost TARGETS corehost)
-target_link_libraries(comhost PRIVATE libhostcommon)
+target_link_libraries(comhost PRIVATE libhostcommon fxr_resolver)

src/native/corehost/configure.h.in

@@ -0,0 +1,23 @@
+#ifndef PAL_HOST_CONFIGURE_H_INCLUDED
+#define PAL_HOST_CONFIGURE_H_INCLUDED
+
+#cmakedefine01 CLR_SINGLE_FILE_HOST_ONLY
+
+#ifdef CLR_SINGLE_FILE_HOST_ONLY
+// When hosting components are all statically linked,
+// the versioning information is irrelevant and may only come up in tracing.
+// so we will use "static"
+#define HOST_POLICY_PKG_NAME "static"
+#define HOST_POLICY_PKG_REL_DIR "static"
+#define REPO_COMMIT_HASH "static"
+#else
+#define HOST_POLICY_PKG_NAME "runtime.@CLI_CMAKE_PKG_RID@.Microsoft.NETCore.DotNetHostPolicy"
+#define HOST_POLICY_PKG_REL_DIR "runtime.@CLI_CMAKE_PKG_RID@/native"
+#define REPO_COMMIT_HASH "@CLI_CMAKE_COMMIT_HASH@"
+#endif
+
+#define FALLBACK_HOST_OS "@CLI_CMAKE_FALLBACK_OS@"
+#define CURRENT_OS_NAME "@CLR_CMAKE_TARGET_OS@"
+#define CURRENT_ARCH_NAME "@CLR_CMAKE_TARGET_ARCH@"
+
+#endif // PAL_HOST_CONFIGURE_H_INCLUDED

src/native/corehost/corehost.cpp

@@ -97,9 +97,15 @@ void need_newer_framework_error(const pal::string_t& dotnet_root, const pal::str
 
 #if defined(CURHOST_EXE)
 
+#if defined(FEATURE_STATIC_HOST) && (defined(TARGET_OSX) || defined(TARGET_LINUX)) && !defined(TARGET_X86)
+extern void initialize_static_createdump();
+#endif
+
 int exe_start(const int argc, const pal::char_t* argv[])
 {
-    pal::initialize_createdump();
+#if defined(FEATURE_STATIC_HOST) && (defined(TARGET_OSX) || defined(TARGET_LINUX)) && !defined(TARGET_X86)
+    initialize_static_createdump();
+#endif
 
     pal::string_t host_path;
     if (!pal::get_own_executable_path(&host_path) || !pal::realpath(&host_path))