Improve clang-cl toolchain support

xmake/core/package/package.lua

@@ -1165,6 +1165,9 @@ function _instance:toolchain(name)
         end
         self:_memcache():set("toolchains_map", toolchains_map)
     end
+    if not toolchains_map[name] then
+        toolchains_map[name] = toolchain.load(name, {plat = self:plat(), arch = self:arch()})
+    end
     return toolchains_map[name]
 end
 

xmake/modules/package/manager/system/find_package.lua

@@ -36,6 +36,17 @@ function _get_package_items()
     return items
 end
 
+-- check package toolchains
+function _check_package_toolchains(package)
+    local has_standalone
+    for _, toolchain_inst in pairs(package:toolchains()) do
+        if toolchain_inst:check() and toolchain_inst:is_standalone() then
+            has_standalone = true
+        end
+    end
+    return has_standalone
+end
+
 -- find package from system and compiler
 -- @see https://github.com/xmake-io/xmake/issues/4596
 --
@@ -55,6 +66,15 @@ function main(name, opt)
     end
     snippet_configs.links = snippet_configs.links or name
 
+    -- We need to check package toolchain first
+    -- https://github.com/xmake-io/xmake/issues/4596#issuecomment-2014528801
+    --
+    -- But if it depends on some toolchain packages,
+    -- then they can't be detected early in the fetch and we have to disable system.find_package
+    if opt.package and not _check_package_toolchains(opt.package) then
+        return
+    end
+
     local snippet_opt = {
         verbose = opt.verbose,
         target = opt.package,

xmake/modules/package/tools/autoconf.lua

@@ -68,7 +68,7 @@ end
 
 -- get msvc
 function _get_msvc(package)
-    local msvc = package:toolchain("msvc") or toolchain.load("msvc", {plat = package:plat(), arch = package:arch()})
+    local msvc = package:toolchain("msvc")
     assert(msvc:check(), "vs not found!") -- we need to check vs envs if it has been not checked yet
     return msvc
 end

xmake/modules/package/tools/cmake.lua

@@ -87,7 +87,7 @@ end
 
 -- get msvc
 function _get_msvc(package)
-    local msvc = package:toolchain("msvc") or toolchain.load("msvc", {plat = package:plat(), arch = package:arch()})
+    local msvc = package:toolchain("msvc")
     assert(msvc:check(), "vs not found!") -- we need to check vs envs if it has been not checked yet
     return msvc
 end
@@ -371,6 +371,15 @@ function _get_configs_for_windows(package, configs, opt)
             table.insert(configs, "-DCMAKE_GENERATOR_TOOLSET=" .. vs_toolset)
         end
     end
+
+    -- use clang-cl
+    if package:has_tool("cc", "clang_cl") then
+        table.insert(configs, "-DCMAKE_C_COMPILER=" .. _translate_bin_path(package:build_getenv("cc")))
+    end
+    if package:has_tool("cxx", "clang_cl") then
+        table.insert(configs, "-DCMAKE_CXX_COMPILER=" .. _translate_bin_path(package:build_getenv("cxx")))
+    end
+
     -- we maybe need patch `cmake_policy(SET CMP0091 NEW)` to enable this argument for some packages
     -- @see https://cmake.org/cmake/help/latest/policy/CMP0091.html#policy:CMP0091
     -- https://github.com/xmake-io/xmake-repo/pull/303
@@ -964,23 +973,40 @@ function _install_for_cmakebuild(package, configs, opt)
     os.vrunv(cmake.program, {"--install", os.curdir()})
 end
 
+-- get cmake generator
+function _get_cmake_generator(package, opt)
+    opt = opt or {}
+    local cmake_generator = opt.cmake_generator
+    if not cmake_generator then
+        if project.policy("package.cmake_generator.ninja") then
+            cmake_generator = "Ninja"
+        end
+        if not cmake_generator then
+            if package:has_tool("cc", "clang_cl") or package:has_tool("cxx", "clang_cl") then
+                cmake_generator = "Ninja"
+            end
+        end
+        local cmake_generator_env = os.getenv("CMAKE_GENERATOR")
+        if not cmake_generator and cmake_generator_env then
+            cmake_generator = cmake_generator_env
+        end
+        if cmake_generator then
+            opt.cmake_generator = cmake_generator
+        end
+    end
+    return cmake_generator
+end
+
 -- build package
 function build(package, configs, opt)
-
-    -- init options
     opt = opt or {}
+    local cmake_generator = _get_cmake_generator(package, opt)
 
     -- enter build directory
     local buildir = opt.buildir or package:buildir()
     os.mkdir(path.join(buildir, "install"))
     local oldir = os.cd(buildir)
 
-    -- exists $CMAKE_GENERATOR? use it
-    local cmake_generator_env = os.getenv("CMAKE_GENERATOR")
-    if not opt.cmake_generator and cmake_generator_env then
-        opt.cmake_generator = cmake_generator_env
-    end
-
     -- pass configurations
     local argv = {}
     for name, value in pairs(_get_configs(package, configs, opt)) do
@@ -1000,7 +1026,6 @@ function build(package, configs, opt)
     os.vrunv(cmake.program, argv, {envs = opt.envs or buildenvs(package, opt)})
 
     -- do build
-    local cmake_generator = opt.cmake_generator
     if opt.cmake_build then
         _build_for_cmakebuild(package, configs, opt)
     elseif cmake_generator then
@@ -1025,12 +1050,8 @@ end
 
 -- install package
 function install(package, configs, opt)
-
-    -- init options
     opt = opt or {}
-    if (not opt.cmake_generator) and project.policy("package.cmake_generator.ninja") then
-        opt.cmake_generator = "Ninja"
-    end
+    local cmake_generator = _get_cmake_generator(package, opt)
 
     -- enter build directory
     local buildir = opt.buildir or package:buildir()
@@ -1056,7 +1077,6 @@ function install(package, configs, opt)
     os.vrunv(cmake.program, argv, {envs = opt.envs or buildenvs(package, opt)})
 
     -- do build and install
-    local cmake_generator = opt.cmake_generator
     if opt.cmake_build then
         _install_for_cmakebuild(package, configs, opt)
     elseif cmake_generator then

xmake/modules/package/tools/gn.lua

@@ -72,7 +72,7 @@ end
 
 -- get msvc
 function _get_msvc(package)
-    local msvc = toolchain.load("msvc", {plat = package:plat(), arch = package:arch()})
+    local msvc = package:toolchain("msvc")
     assert(msvc:check(), "vs not found!") -- we need to check vs envs if it has been not checked yet
     return msvc
 end

xmake/modules/package/tools/meson.lua

@@ -347,7 +347,7 @@ end
 
 -- get msvc
 function _get_msvc(package)
-    local msvc = toolchain.load("msvc", {plat = package:plat(), arch = package:arch()})
+    local msvc = package:toolchain("msvc")
     assert(msvc:check(), "vs not found!") -- we need to check vs envs if it has been not checked yet
     return msvc
 end

xmake/modules/package/tools/msbuild.lua

@@ -31,7 +31,7 @@ end
 
 -- get msvc
 function _get_msvc(package)
-    local msvc = toolchain.load("msvc", {plat = package:plat(), arch = package:arch()})
+    local msvc = package:toolchain("msvc")
     assert(msvc:check(), "vs not found!") -- we need to check vs envs if it has been not checked yet
     return msvc
 end

xmake/modules/private/action/require/impl/actions/install.lua

@@ -222,7 +222,6 @@ function _fix_paths_for_precompiled_package(package)
     end
 end
 
-
 -- check package toolchains
 function _check_package_toolchains(package)
     for _, toolchain_inst in pairs(package:toolchains()) do

xmake/modules/private/utils/toolchain.lua

@@ -25,7 +25,7 @@ function is_compatible_with_host(name)
             return true
         end
     elseif is_host("windows") then
-        if name == "msvc" or name == "llvm" then
+        if name == "msvc" or name == "llvm" or name == "clang-cl" then
             return true
         end
     end