Copy infra files from runtime

Author: am11

eng/native/build-commons.sh

@@ -0,0 +1,11 @@
+if(CLR_CMAKE_HOST_WIN32)
+    add_compile_options($<$<AND:$<COMPILE_LANGUAGE:C,CXX>,$<CONFIG:Debug>>:/Od>)
+    add_compile_options($<$<AND:$<COMPILE_LANGUAGE:C,CXX>,$<CONFIG:Checked>>:/O1>)
+    add_compile_options($<$<AND:$<COMPILE_LANGUAGE:C,CXX>,$<CONFIG:Release>>:/Ox>)
+    add_compile_options($<$<AND:$<COMPILE_LANGUAGE:C,CXX>,$<CONFIG:RelWithDebInfo>>:/O2>)
+elseif(CLR_CMAKE_HOST_UNIX)
+    add_compile_options($<$<CONFIG:Debug>:-O0>)
+    add_compile_options($<$<CONFIG:Checked>:-O2>)
+    add_compile_options($<$<CONFIG:Release>:-O3>)
+    add_compile_options($<$<CONFIG:RelWithDebInfo>:-O2>)
+endif()

eng/native/configurecompiler.cmake

@@ -0,0 +1,4 @@
+get_filename_component(CLR_REPO_ROOT_DIR ${CMAKE_CURRENT_LIST_DIR}/../.. ABSOLUTE)
+set(CLR_ENG_NATIVE_DIR ${CMAKE_CURRENT_LIST_DIR})
+get_filename_component(CLR_SRC_NATIVE_DIR ${CMAKE_CURRENT_LIST_DIR}/../../src/native ABSOLUTE)
+get_filename_component(CLR_SRC_LIBS_NATIVE_DIR ${CMAKE_CURRENT_LIST_DIR}/../../src/libraries/Native ABSOLUTE)