onedpl add fetch.lua (#4324)

* Update onedpl xmake.lua

* Create fetch.lua

* Update xmake.lua

rc1

* Update xmake.lua

/* MACROS DUE TO 3b9a1bb1af (diff-4c6821476cefc699b801f5fdbeda3341e3c64626dcf39a79621ea02031bdd50eL113) */
            /* ALSO C.F. https://github.com/oneapi-src/oneDPL/issues/1602 */
            /* AND THE USING OF _PSTL_... MACROS IS REMOVED FROM ONEDPL NOWADAYS*/

* Update xmake.lua

typo

* Update xmake.lua

* bad ci ; try again

ci on arch linux failed due to network error

* Update xmake.lua

* Refine config

* refine fetch.lua

remove unnecessary add_deps

* Update xmake.lua

* minor formatting refinement

packages/o/onedpl/fetch.lua

@@ -0,0 +1,44 @@
+import("lib.detect.find_path")
+import("lib.detect.find_library")
+
+function _find_package(package, opt)
+    local paths = {
+	    "$(env DPL_ROOT)",
+        "$(env ONEAPI_ROOT)/dpl/latest"
+    }
+    -- find library
+    local result = {links = {}, linkdirs = {}, includedirs = {}}
+
+    -- find include
+    local includepath = find_path(path.join("oneapi", "dpl", "algorithm"), paths, {suffixes = "include"})
+    if includepath then
+        table.insert(result.includedirs, includepath)
+    end
+	
+    if #result.includedirs > 0  then
+        local version_file = path.join(includepath, "oneapi", "dpl", "pstl", "onedpl_config.h")
+        if os.isfile(version_file) then
+            local content = io.readfile(version_file)
+            local major = content:match("ONEDPL_VERSION_MAJOR +(%d+)\n")
+            local minor = content:match("ONEDPL_VERSION_MINOR +(%d+)\n")
+            local patch = content:match("ONEDPL_VERSION_PATCH +(%d+)\n")
+            if patch then
+                result.version = format("%s.%s.%s", major, minor, patch)
+            else
+                result.version = format("%s.%s", major, minor)
+            end
+        end
+	
+        return result
+    end
+end
+
+function main(package, opt)
+    if opt.system and package.find_package then
+        local result = _find_package(package, opt)
+        if not result then
+            result = package:find_package("onedpl", opt)
+        end
+        return result or false
+    end
+end

packages/o/onedpl/xmake.lua

@@ -4,18 +4,37 @@ package("onedpl")
     set_homepage("https://www.intel.com/content/www/us/en/developer/tools/oneapi/dpc-library.html")
     set_description("oneAPI DPC++ Library")
 
+    add_urls("https://github.com/oneapi-src/oneDPL/archive/refs/tags/oneDPL-$(version).tar.gz")
     add_urls("https://github.com/oneapi-src/oneDPL/archive/refs/tags/oneDPL-$(version)-release.tar.gz")
     add_versions("2021.6.1", "4995fe2ed2724b89cdb52c4b6c9af22e146b48d2561abdafdaaa06262dbd67c4")
+    add_versions("2022.5.0-rc1", "9180c60331ec5b307dd89a5d8bfcd096667985c6761c52322405d4b69193ed88")
 
     add_configs("backend", {description = "Choose threading backend.", default = "tbb", type = "string", values = {"tbb", "dpcpp", "dpcpp_only", "omp", "serial"}})
 
     add_deps("cmake")
+
+    on_fetch("fetch")
     on_load("windows", "linux", function (package)
         local backend = package:config("backend")
-        if backend == "tbb" or backend == "dpcpp" then
+        if backend == "tbb"  then
             package:add("deps", "tbb")
+	        package:add("defines", "ONEDPL_USE_TBB_BACKEND=1")
+            package:add("ldflags", "-ltbb")
         elseif backend == "omp" then
             package:add("deps", "openmp")
+	        package:add("defines", "ONEDPL_USE_OPENMP_BACKEND=1")
+	    elseif backend == "dpcpp" then
+	        package:add("deps", "tbb")
+            package:add("ldflags", "-ltbb")
+            package:add("defines", "ONEDPL_USE_TBB_BACKEND=1")
+	        package:add("defines", "ONEDPL_USE_DPCPP_BACKEND=1")
+        elseif backend == "dpcpp_only" then
+            package:add("defines", "ONEDPL_USE_TBB_BACKEND=0")
+	        package:add("defines", "ONEDPL_USE_DPCPP_BACKEND=1")
+        elseif backend == "serial" then
+            package:add("defines", "ONEDPL_USE_OPENMP_BACKEND=0")
+            package:add("defines", "ONEDPL_USE_TBB_BACKEND=0")
+	        package:add("defines", "ONEDPL_USE_DPCPP_BACKEND=0")
         end
         if package:is_plat("windows") then
             package:add("cxxflags", "/Zc:__cplusplus")
@@ -24,6 +43,9 @@ package("onedpl")
 
     on_install("windows", "linux", function (package)
         io.replace("CMakeLists.txt", "add_subdirectory(test)", "", {plain = true})
+        -- c.f. https://github.com/oneapi-src/oneDPL/issues/1602  and https://github.com/oneapi-src/oneDPL/commit/e25afef957b50536c5091ed23150fff10921b18f
+        io.replace("include/oneapi/dpl/pstl/algorithm_impl.h", "(_PSTL_UDR_PRESENT || _ONEDPL_UDR_PRESENT)", "_ONEDPL_UDR_PRESENT // _PSTL_UDR_PRESENT", {plain = true})
+        io.replace("include/oneapi/dpl/pstl/numeric_impl.h", "(_PSTL_UDS_PRESENT || _ONEDPL_UDS_PRESENT)", "_ONEDPL_UDS_PRESENT // PSTL_UDS_PRESENT", {plain = true})
         local configs = {}
         table.insert(configs, "-DCMAKE_BUILD_TYPE=" .. (package:debug() and "Debug" or "Release"))
         table.insert(configs, "-DONEDPL_BACKEND=" .. package:config("backend"))