[clang] [lldb] Revert "NFC: Make clang resource headers an interface library (#88317)" (PR #89266)

[Evan Wilde via cfe-commits]

https://github.com/etcwilde created https://github.com/llvm/llvm-project/pull/89266

This reverts commit 8d468c132eed7ffe34d601b224220efd51655eb3.

@ayermolo reports seeing the following error when the clang-resource-headers are a library instead of a custom target:
```
CMake Error at CMakeLists.txt:86 (get_property):
  get_property could not find TARGET clang-resource-headers.  Perhaps it has
  not yet been created.
```
I don't see this line in the LLVM repository, and I'm not sure how it worked as a custom target since this change doesn't affect whether or not the CMake target is generated, nor does it impact the order that targets are created in. 

>From 9b16756a69ddbce1e586535e931f7c2b923ff2ba Mon Sep 17 00:00:00 2001
From: Evan Wilde <etceterawilde at gmail.com>
Date: Thu, 18 Apr 2024 09:58:52 -0700
Subject: [PATCH 1/2] Revert "NFC: Make clang resource headers an interface
 library (#88317)"

This reverts commit 8d468c132eed7ffe34d601b224220efd51655eb3.
---
 clang/lib/Headers/CMakeLists.txt | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/clang/lib/Headers/CMakeLists.txt b/clang/lib/Headers/CMakeLists.txt
index e6ae4e19e81db9..97104ccd8db59c 100644
--- a/clang/lib/Headers/CMakeLists.txt
+++ b/clang/lib/Headers/CMakeLists.txt
@@ -437,14 +437,14 @@ foreach( f ${generated_files} )
 endforeach( f )
 
 function(add_header_target target_name file_list)
-  add_library(${target_name} INTERFACE ${file_list})
+  add_custom_target(${target_name} DEPENDS ${file_list})
   set_target_properties(${target_name} PROPERTIES
     FOLDER "Misc"
     RUNTIME_OUTPUT_DIRECTORY "${output_dir}")
 endfunction()
 
 # The catch-all clang-resource-headers target
-add_library(clang-resource-headers INTERFACE ${out_files})
+add_custom_target("clang-resource-headers" ALL DEPENDS ${out_files})
 set_target_properties("clang-resource-headers" PROPERTIES
   FOLDER "Misc"
   RUNTIME_OUTPUT_DIRECTORY "${output_dir}")
@@ -501,10 +501,6 @@ add_header_target("windows-resource-headers" ${windows_only_files})
 add_header_target("utility-resource-headers" ${utility_files})
 
 get_clang_resource_dir(header_install_dir SUBDIR include)
-target_include_directories(clang-resource-headers INTERFACE
-  $<BUILD_INTERFACE:${output_dir}>
-  $<INSTALL_INTERFACE:${header_install_dir}>)
-set_property(GLOBAL APPEND PROPERTY CLANG_EXPORTS clang-resource-headers)
 
 #############################################################
 # Install rules for the catch-all clang-resource-headers target

>From 216f7532bc9160634a338f1ff09c06b911f1ff53 Mon Sep 17 00:00:00 2001
From: Evan Wilde <etceterawilde at gmail.com>
Date: Thu, 18 Apr 2024 09:59:16 -0700
Subject: [PATCH 2/2] Revert "[lldb] Fix the standalone Xcode build after
 #88317"

This reverts commit a855eea7fe86ef09a87f6251b3b711b821ae32bf.
---
 lldb/cmake/modules/LLDBFramework.cmake | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lldb/cmake/modules/LLDBFramework.cmake b/lldb/cmake/modules/LLDBFramework.cmake
index f915839f6b45a5..81fc596ef4244e 100644
--- a/lldb/cmake/modules/LLDBFramework.cmake
+++ b/lldb/cmake/modules/LLDBFramework.cmake
@@ -119,7 +119,7 @@ add_custom_command(TARGET liblldb POST_BUILD
 if(NOT APPLE_EMBEDDED)
   if (TARGET clang-resource-headers)
     add_dependencies(liblldb clang-resource-headers)
-    set(clang_resource_headers_dir $<TARGET_PROPERTY:clang-resource-headers,INTERFACE_INCLUDE_DIRECTORIES>)
+    set(clang_resource_headers_dir $<TARGET_PROPERTY:clang-resource-headers,RUNTIME_OUTPUT_DIRECTORY>)
   else()
     set(clang_resource_headers_dir ${LLDB_EXTERNAL_CLANG_RESOURCE_DIR}/include)
     if(NOT EXISTS ${clang_resource_headers_dir})