Add a version requirement for dpcpp inside CMakeList.txt. (#339)

* Add a version requirement for dpcpp inside CMakeList.txt.

* Add dpcpp_cpp_rt version requirement to dpctl.

Author: Diptorup Deb

conda-recipe/meta.yaml

@@ -28,11 +28,13 @@ requirements:
     run:
         - python
         - numpy >=1.17
-        - dpcpp_cpp_rt
+        - dpcpp_cpp_rt >=2021.2
+
 test:
-  requires:
-    - pytest
-    - pytest-cov
+    requires:
+        - pytest
+        - pytest-cov
+
 about:
     home: https://github.com/IntelPython/dpctl.git
     license: Apache-2.0

dpctl-capi/CMakeLists.txt

@@ -25,7 +25,7 @@ option(DPCTL_BUILD_CAPI_TESTS
 
 # Load our CMake modules to search for DPCPP and Level Zero
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/cmake/modules/")
-find_package(DPCPP REQUIRED)
+find_package(DPCPP 2021.2.0 REQUIRED)
 
 if(DPCTL_ENABLE_LO_PROGRAM_CREATION)
     set(DPCTL_ENABLE_LO_PROGRAM_CREATION 1)

dpctl-capi/cmake/modules/FindDPCPP.cmake

@@ -24,13 +24,15 @@
 # If successful, the following variables will be defined:
 # DPCPP_FOUND
 # DPCPP_VERSION
+# DPCPP_VERSION_MAJOR
+# DPCPP_VERSION_MINOR
 # DPCPP_INCLUDE_DIR
 # DPCPP_SYCL_INCLUDE_DIR
 # DPCPP_LIBRARY_DIR
 # DPCPP_SYCL_LIBRARY
 # DPCPP_OPENCL_LIBRARY
 
-include( FindPackageHandleStandardArgs )
+include(FindPackageHandleStandardArgs)
 
 string(COMPARE EQUAL "${DPCPP_INSTALL_DIR}" "" no_dpcpp_root)
 if(${no_dpcpp_root})
@@ -57,10 +59,13 @@ execute_process(
 # If dpcpp is found then set the package variables
 if(${dpcpp_result} MATCHES "0")
     string(REPLACE "\n" ";" DPCPP_VERSION_LIST "${dpcpp_ver}")
+    set(IDX 0)
     list(GET DPCPP_VERSION_LIST 0 dpcpp_ver_line)
     foreach(X ${DPCPP_VERSION_LIST})
-        message(STATUS "dpcpp ver[${dpcpp_result}]: ${X}")
+        message(STATUS "dpcpp ver[${IDX}]: ${X}")
+        MATH(EXPR IDX "${IDX}+1")
     endforeach()
+    list(GET DPCPP_VERSION_LIST 0 VERSION_STRING)
 
     # check if llvm-cov and llvm-profdata are packaged as part of dpcpp
     find_program(LLVM_COV_EXE
@@ -89,7 +94,13 @@ if(${dpcpp_result} MATCHES "0")
 
     # set package-level variables
     set(DPCPP_ROOT ${DPCPP_INSTALL_DIR})
-    list(GET DPCPP_VERSION_LIST 0 DPCPP_VERSION)
+    # Get the dpcpp version
+    string(REGEX MATCH "[0-9]+\.[0-9]+\.[0-9]+" DPCPP_VERSION ${VERSION_STRING})
+    # Split out the version into major, minor an patch
+    string(REPLACE "." ";" DPCPP_VERSION_LIST1 "${DPCPP_VERSION}")
+    list(GET DPCPP_VERSION_LIST1 0 DPCPP_VERSION_MAJOR)
+    list(GET DPCPP_VERSION_LIST1 1 DPCPP_VERSION_MINOR)
+    list(GET DPCPP_VERSION_LIST1 2 DPCPP_VERSION_PATCH)
     set(DPCPP_INCLUDE_DIR ${DPCPP_INSTALL_DIR}/include)
     set(DPCPP_SYCL_INCLUDE_DIR ${DPCPP_INSTALL_DIR}/include/sycl)
     set(DPCPP_LIBRARY_DIR ${DPCPP_INSTALL_DIR}/lib)
@@ -100,15 +111,26 @@ if(${dpcpp_result} MATCHES "0")
         set(DPCPP_SYCL_LIBRARY ${DPCPP_INSTALL_DIR}/lib/libsycl.so)
         set(DPCPP_OPENCL_LIBRARY ${DPCPP_INSTALL_DIR}/lib/libOpenCL.so)
     endif()
-	set(DPCPP_FOUND TRUE)
 else()
     message(STATUS "DPCPP needed to build dpctl_sycl_interface")
     return()
 endif()
 
+# Check if a specific version of DPCPP is requested
+if(DPCPP_FIND_VERSION)
+    string(COMPARE EQUAL ${DPCPP_FIND_VERSION} ${DPCPP_VERSION} VERSION_MATCH)
+    if(VERSION_MATCH)
+        set(DPCPP_FOUND TRUE)
+    endif()
+else()
+    set(DPCPP_FOUND TRUE)
+endif()
+
 find_package_handle_standard_args(DPCPP DEFAULT_MSG
     DPCPP_FOUND
     DPCPP_VERSION
+    DPCPP_VERSION_MAJOR
+    DPCPP_VERSION_MINOR
     DPCPP_INCLUDE_DIR
     DPCPP_SYCL_INCLUDE_DIR
     DPCPP_LIBRARY_DIR