Add DpctlExtCAPI interface target

Author: vlad-perevezentsev

CMakeLists.txt

@@ -344,5 +344,14 @@ if(DEFINED SKBUILD)
     set(_ignore_me ${SKBUILD})
 endif()
 
-add_subdirectory(dpnp)
+# TODO: Replace `${CMAKE_BINARY_DIR}` with a dedicated public include root
+# for dpctl_ext C-API headers
+# Unlike dpctl which exposes C-API from `dpctl/apis/include`,
+# dpctl_ext currently relies on generated headers in the build tree.
+# `${CMAKE_BINARY_DIR}` is a temporary workaround.
+
+add_library(DpctlExtCAPI INTERFACE)
+target_include_directories(DpctlExtCAPI INTERFACE ${CMAKE_BINARY_DIR})
+
 add_subdirectory(dpctl_ext)
+add_subdirectory(dpnp)

dpctl_ext/tensor/CMakeLists.txt

@@ -35,6 +35,7 @@ foreach(_cy_file ${_cython_sources})
     build_dpctl_ext(${_trgt} ${_cy_file} "dpctl_ext/tensor" RELATIVE_PATH "..")
     target_include_directories(${_trgt} PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/include)
     # target_link_libraries(DpctlCAPI INTERFACE ${_trgt}_headers)
+    target_link_libraries(DpctlExtCAPI INTERFACE ${_trgt}_headers)
 endforeach()
 
 if(WIN32)
@@ -346,6 +347,7 @@ foreach(python_module_name ${_py_trgts})
     #   dpctl4pybind11.hpp. It will allow to simplify dependency tree
     # NOTE: dpctl C-API is resolved at runtime via Python
     # target_link_libraries(${python_module_name} PRIVATE DpctlCAPI)
+    target_link_libraries(${python_module_name} PRIVATE DpctlExtCAPI)
     if(DPNP_WITH_REDIST)
         set_target_properties(
             ${python_module_name}

dpnp/backend/extensions/blas/CMakeLists.txt

@@ -39,6 +39,8 @@ set(_module_src
 pybind11_add_module(${python_module_name} MODULE ${_module_src})
 add_sycl_to_target(TARGET ${python_module_name} SOURCES ${_module_src})
 
+target_link_libraries(${python_module_name} PRIVATE DpctlExtCAPI)
+
 if(_dpnp_sycl_targets)
     # make fat binary
     target_compile_options(

dpnp/backend/extensions/fft/CMakeLists.txt

@@ -33,6 +33,8 @@ set(_module_src ${CMAKE_CURRENT_SOURCE_DIR}/fft_py.cpp)
 pybind11_add_module(${python_module_name} MODULE ${_module_src})
 add_sycl_to_target(TARGET ${python_module_name} SOURCES ${_module_src})
 
+target_link_libraries(${python_module_name} PRIVATE DpctlExtCAPI)
+
 if(_dpnp_sycl_targets)
     # make fat binary
     target_compile_options(

dpnp/backend/extensions/indexing/CMakeLists.txt

@@ -36,6 +36,8 @@ set(_module_src
 pybind11_add_module(${python_module_name} MODULE ${_module_src})
 add_sycl_to_target(TARGET ${python_module_name} SOURCES ${_module_src})
 
+target_link_libraries(${python_module_name} PRIVATE DpctlExtCAPI)
+
 if(_dpnp_sycl_targets)
     # make fat binary
     target_compile_options(

dpnp/backend/extensions/lapack/CMakeLists.txt

@@ -55,6 +55,7 @@ set(_module_src
 
 pybind11_add_module(${python_module_name} MODULE ${_module_src})
 add_sycl_to_target(TARGET ${python_module_name} SOURCES ${_module_src})
+target_link_libraries(${python_module_name} PRIVATE DpctlExtCAPI)
 
 if(_dpnp_sycl_targets)
     # make fat binary

dpnp/backend/extensions/statistics/CMakeLists.txt

@@ -41,6 +41,8 @@ set(_module_src
 pybind11_add_module(${python_module_name} MODULE ${_module_src})
 add_sycl_to_target(TARGET ${python_module_name} SOURCES ${_module_src})
 
+target_link_libraries(${python_module_name} PRIVATE DpctlExtCAPI)
+
 if(_dpnp_sycl_targets)
     # make fat binary
     target_compile_options(

dpnp/backend/extensions/ufunc/CMakeLists.txt

@@ -67,6 +67,8 @@ set(_module_src
 pybind11_add_module(${python_module_name} MODULE ${_module_src})
 add_sycl_to_target(TARGET ${python_module_name} SOURCES ${_module_src})
 
+target_link_libraries(${python_module_name} PRIVATE DpctlExtCAPI)
+
 if(WIN32)
     if(${CMAKE_VERSION} VERSION_LESS "3.27")
         # this is a work-around for target_link_options inserting option after -link option, cause

dpnp/backend/extensions/vm/CMakeLists.txt

@@ -90,6 +90,8 @@ set(python_module_name _vm_impl)
 pybind11_add_module(${python_module_name} MODULE ${_module_src})
 add_sycl_to_target(TARGET ${python_module_name} SOURCES ${_module_src})
 
+target_link_libraries(${python_module_name} PRIVATE DpctlExtCAPI)
+
 if(WIN32)
     if(${CMAKE_VERSION} VERSION_LESS "3.27")
         # this is a work-around for target_link_options inserting option after -link option, cause

dpnp/backend/extensions/window/CMakeLists.txt

@@ -36,6 +36,8 @@ set(_module_src
 pybind11_add_module(${python_module_name} MODULE ${_module_src})
 add_sycl_to_target(TARGET ${python_module_name} SOURCES ${_module_src})
 
+target_link_libraries(${python_module_name} PRIVATE DpctlExtCAPI)
+
 if(_dpnp_sycl_targets)
     # make fat binary
     target_compile_options(