lib/Header: Fix Visual Studio builds try #2

Summary:
This is a follow up to r355253 and a better fix than the first attempt
which was r359257.

We can't install anything from ${CMAKE_CFG_INTDIR}, because this value
is only defined at build time, but we still must make sure to copy the
headers into ${CMAKE_CFG_INTDIR}/lib/clang/$VERSION/include, because the lit
tests look for headers there.  So for this fix we revert to the
old behavior of copying the headers to ${CMAKE_CFG_INTDIR}/lib/clang/$VERSION/include
during the build and then installing them from the source tree.

Reviewers: smeenai, vzakhari, phosek

Reviewed By: smeenai, vzakhari

Subscribers: mgorny, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D61220

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@359654 91177308-0d34-0410-b5e6-96231b3b80d8

Author: tstellar

lib/Headers/CMakeLists.txt

@@ -128,6 +128,7 @@ set(ppc_wrapper_files
 
 set(output_dir ${LLVM_LIBRARY_OUTPUT_INTDIR}/clang/${CLANG_VERSION}/include)
 set(out_files)
+set(generated_files)
 
 function(copy_header_to_output_dir src_dir file)
   set(src ${src_dir}/${file})
@@ -147,6 +148,8 @@ function(clang_generate_header td_option td_file out_file)
 
   copy_header_to_output_dir(${CMAKE_CURRENT_BINARY_DIR} ${out_file})
   set(out_files ${out_files} PARENT_SCOPE)
+  list(APPEND generated_files "${CMAKE_CURRENT_BINARY_DIR}/${out_file}")
+  set(generated_files ${generated_files} PARENT_SCOPE)
 endfunction(clang_generate_header)
 
 
@@ -166,13 +169,23 @@ set_target_properties(clang-resource-headers PROPERTIES
   FOLDER "Misc"
   RUNTIME_OUTPUT_DIRECTORY "${output_dir}")
 
-set(header_install_dir lib${LLVM_LIBDIR_SUFFIX}/clang/${CLANG_VERSION})
+set(header_install_dir lib${LLVM_LIBDIR_SUFFIX}/clang/${CLANG_VERSION}/include)
 
 install(
-  DIRECTORY ${output_dir}
+  FILES ${files} ${generated_files}
   DESTINATION ${header_install_dir}
   COMPONENT clang-resource-headers)
 
+install(
+  FILES ${cuda_wrapper_files}
+  DESTINATION ${header_install_dir}/cuda_wrappers
+  COMPONENT clang-resource-headers)
+
+install(
+  FILES ${ppc_wrapper_files}
+  DESTINATION ${header_install_dir}/ppc_wrappers
+  COMPONENT clang-resource-headers)
+
 if (NOT LLVM_ENABLE_IDE)
   add_llvm_install_targets(install-clang-resource-headers
                            DEPENDS clang-resource-headers