https://github.com/wenju-he created 
https://github.com/llvm/llvm-project/pull/197654

Move libclc_add_builtin_library(opencl) and add_subdirectory(opencl) inside 
libclc_add_library. This undos part of change in 14bf8e7.

This simplifies creating different libraries by invoking libclc_add_library 
multiple times, without the need of splitting intermediate library creation and 
its finalization.

add_subdirectory(opencl) only updates sources list of existing library target, 
so it is safe to move inside libclc_add_library.

>From d8b4e76181daa3821f0cf5adc172707a06edddf3 Mon Sep 17 00:00:00 2001
From: Wenju He <[email protected]>
Date: Thu, 14 May 2026 08:08:38 +0200
Subject: [PATCH] [libclc] Move opencl library creation and sources collection
 into libclc_add_library

Move libclc_add_builtin_library(opencl) and add_subdirectory(opencl)
inside libclc_add_library. This undos part of change in 14bf8e7.

This simplifies creating different libraries by invoking
libclc_add_library multiple times, without the need of splitting
intermediate library creation and its finalization.

add_subdirectory(opencl) only updates sources list of existing
library target, so it is safe to move inside libclc_add_library.
---
 libclc/CMakeLists.txt                | 22 +++++-------
 libclc/cmake/modules/AddLibclc.cmake | 52 ++++++++++++++++++----------
 2 files changed, 43 insertions(+), 31 deletions(-)

diff --git a/libclc/CMakeLists.txt b/libclc/CMakeLists.txt
index 5630c8c59cca4..9fbf9b4ade30b 100644
--- a/libclc/CMakeLists.txt
+++ b/libclc/CMakeLists.txt
@@ -204,27 +204,23 @@ libclc_add_builtin_library(${LIBCLC_CLC_TARGET}
   FOLDER "libclc/Device IR/CLC"
 )
 
-set(LIBCLC_OPENCL_TARGET opencl)
-libclc_add_builtin_library(${LIBCLC_OPENCL_TARGET}
-  COMPILE_OPTIONS ${compile_flags} "SHELL:-Xclang -fdeclare-opencl-builtins"
-  INCLUDE_DIRS
-    ${CMAKE_CURRENT_SOURCE_DIR}/clc/include
-    ${CMAKE_CURRENT_SOURCE_DIR}/opencl/include
-  COMPILE_DEFINITIONS ${common_defs}
-  FOLDER "libclc/Device IR/Intermediate"
-)
-
 add_subdirectory(clc)
-add_subdirectory(opencl)
 
-# Link and install the final OpenCL builtins library.
+# Build, link, and install the final OpenCL builtins library.
+set(LIBCLC_OPENCL_TARGET opencl)
 libclc_add_library(libclc-${LIBCLC_TARGET}
   ARCH ${LIBCLC_TARGET_ARCH}
   TRIPLE ${clang_triple}
   TARGET_TRIPLE ${LIBCLC_TARGET}
-  LIBRARIES ${LIBCLC_OPENCL_TARGET}
+  COMPILE_OPTIONS ${compile_flags} "SHELL:-Xclang -fdeclare-opencl-builtins"
+  INCLUDE_DIRS
+    ${CMAKE_CURRENT_SOURCE_DIR}/clc/include
+    ${CMAKE_CURRENT_SOURCE_DIR}/opencl/include
+  COMPILE_DEFINITIONS ${common_defs}
   INTERNALIZE_LIBRARIES ${LIBCLC_CLC_TARGET}
   OPT_FLAGS ${opt_flags}
+  SOURCE_TARGET ${LIBCLC_OPENCL_TARGET}
+  SOURCE_SUB_DIR opencl
   OUTPUT_FILENAME libclc
   PARENT_TARGET libclc-opencl-builtins
 )
diff --git a/libclc/cmake/modules/AddLibclc.cmake 
b/libclc/cmake/modules/AddLibclc.cmake
index 60900b7e4f8e7..10864f61df38a 100644
--- a/libclc/cmake/modules/AddLibclc.cmake
+++ b/libclc/cmake/modules/AddLibclc.cmake
@@ -70,25 +70,41 @@ function(libclc_add_builtin_library target_name)
   set_target_properties(${target_name} PROPERTIES FOLDER ${ARG_FOLDER})
 endfunction()
 
-# Links builtin libclc object libraries together into a merged bitcode or 
SPIR-V
-# file and a static archive.
+# Builds a builtin library from sources, links it with any internalized
+# dependencies, produces the final output file, and registers it for
+# installation.
 function(libclc_add_library target_name)
   cmake_parse_arguments(ARG
     ""
-    "ARCH;TRIPLE;TARGET_TRIPLE;OUTPUT_FILENAME;PARENT_TARGET"
-    "LIBRARIES;INTERNALIZE_LIBRARIES;OPT_FLAGS"
+    
"ARCH;TRIPLE;TARGET_TRIPLE;SOURCE_TARGET;SOURCE_SUB_DIR;OUTPUT_FILENAME;PARENT_TARGET"
+    
"COMPILE_OPTIONS;INCLUDE_DIRS;COMPILE_DEFINITIONS;INTERNALIZE_LIBRARIES;OPT_FLAGS"
     ${ARGN}
   )
 
+  if(NOT ARG_SOURCE_TARGET)
+    message(FATAL_ERROR "SOURCE_TARGET is required for libclc_add_library")
+  endif()
+  if(NOT ARG_SOURCE_SUB_DIR)
+    message(FATAL_ERROR "SOURCE_SUB_DIR is required for libclc_add_library")
+  endif()
   if(NOT ARG_OUTPUT_FILENAME)
     message(FATAL_ERROR "OUTPUT_FILENAME is required for libclc_add_library")
   endif()
   if(NOT ARG_PARENT_TARGET)
     message(FATAL_ERROR "PARENT_TARGET is required for libclc_add_library")
   endif()
-  if(NOT ARG_LIBRARIES)
-    message(FATAL_ERROR "LIBRARIES is required for libclc_add_library")
-  endif()
+
+  libclc_add_builtin_library(${ARG_SOURCE_TARGET}
+    COMPILE_OPTIONS ${ARG_COMPILE_OPTIONS}
+    INCLUDE_DIRS ${ARG_INCLUDE_DIRS}
+    COMPILE_DEFINITIONS ${ARG_COMPILE_DEFINITIONS}
+    FOLDER "libclc/Device IR/Intermediate"
+  )
+  # Populate sources.
+  add_subdirectory(
+    ${LIBCLC_SOURCE_DIR}/${ARG_SOURCE_SUB_DIR}
+    ${CMAKE_CURRENT_BINARY_DIR}/${target_name}
+  )
 
   set(library_dir ${LIBCLC_OUTPUT_LIBRARY_DIR}/${ARG_TARGET_TRIPLE})
   file(MAKE_DIRECTORY ${library_dir})
@@ -97,7 +113,7 @@ function(libclc_add_library target_name)
   set(archive_target ${target_name}.a)
   add_library(${archive_target} STATIC)
   target_link_libraries(${archive_target} PRIVATE
-    ${ARG_LIBRARIES} ${ARG_INTERNALIZE_LIBRARIES}
+    ${ARG_SOURCE_TARGET} ${ARG_INTERNALIZE_LIBRARIES}
   )
   set_target_properties(${archive_target} PROPERTIES
     OUTPUT_NAME ${ARG_OUTPUT_FILENAME}
@@ -106,19 +122,19 @@ function(libclc_add_library target_name)
     FOLDER "libclc/Device IR/Library"
   )
 
-  # Link the object files, using a temporary library as for internalization.
+  # Link the object files, using a temporary library for internalization.
   set(linked_bc ${CMAKE_CURRENT_BINARY_DIR}/${target_name}.linked.bc)
   set(link_cmd ${llvm-link_exe})
   set(link_deps ${llvm-link_target})
-  foreach(lib ${ARG_LIBRARIES})
-    add_library(${target_name}-${lib} STATIC)
-    target_link_libraries(${target_name}-${lib} PRIVATE ${lib})
-    set_target_properties(${target_name}-${lib} PROPERTIES
-      FOLDER "libclc/Device IR/Library"
-    )
-    list(APPEND link_cmd $<TARGET_FILE:${target_name}-${lib}>)
-    list(APPEND link_deps ${target_name}-${lib})
-  endforeach()
+
+  add_library(${target_name}-src STATIC)
+  target_link_libraries(${target_name}-src PRIVATE ${ARG_SOURCE_TARGET})
+  set_target_properties(${target_name}-src PROPERTIES
+    FOLDER "libclc/Device IR/Library"
+  )
+  list(APPEND link_cmd $<TARGET_FILE:${target_name}-src>)
+  list(APPEND link_deps ${target_name}-src)
+
   if(ARG_INTERNALIZE_LIBRARIES)
     list(APPEND link_cmd --internalize --only-needed)
     foreach(lib ${ARG_INTERNALIZE_LIBRARIES})

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