Improve clang toolcahin for building package with lto

3 files changed, 28 insertions, 7 deletions

diff --git a/xmake/rules/c++/build_optimization/config.lua b/xmake/rules/c++/build_optimization/config.lua
index 4324bcf76..f5bff67fc 100644
--- a/xmake/rules/c++/build_optimization/config.lua
+++ b/xmake/rules/c++/build_optimization/config.lua
@@ -58,9 +58,17 @@ function _add_lto_optimization(target, sourcekind)
         end
     end
 
-    if cc == "clang_cl" and ld == "link" then
-        wprint([[clang-cl + msvc link unsupported lto, please use `set_toolset("ld", "lld-link")`]])
-        target:set("toolset", "ld", "lld-link")
+    local program, ar = target:tool("ar")
+    if cc == "clang_cl" then
+        if ld == "link" then
+            wprint([[Unsupported toolset(%s) for lto, please use `set_toolset("ld", "lld-link")`]], ld)
+            target:set("toolset", "ld", "lld-link")
+            target:set("toolset", "sh", "lld-link")
+        end
+        if ar ~= "llvm-ar" and ar ~= "llvm_ar" then
+            wprint([[Unsupported toolset(%s) for lto, please use `set_toolset("ar", "llvm-ar")`]], ar)
+            target:set("toolset", "ar", "llvm-ar")
+        end
     end
 end
 
diff --git a/xmake/toolchains/clang-cl/load.lua b/xmake/toolchains/clang-cl/load.lua
index 1cf8de3dc..f8848064f 100644
--- a/xmake/toolchains/clang-cl/load.lua
+++ b/xmake/toolchains/clang-cl/load.lua
@@ -22,6 +22,7 @@
 import("core.base.option")
 import("core.project.config")
 import("detect.sdks.find_vstudio")
+import("core.project.project")
 
 -- add the given vs environment
 function _add_vsenv(toolchain, name, curenvs)
@@ -59,9 +60,15 @@ function main(toolchain)
     else
         toolchain:set("toolset", "as",  "ml.exe")
     end
-    toolchain:set("toolset", "ld",  "link.exe")
-    toolchain:set("toolset", "sh",  "link.exe")
-    toolchain:set("toolset", "ar",  "link.exe")
+    if project.policy("build.optimization.lto") then
+        toolchain:set("toolset", "ld",  "lld-link")
+        toolchain:set("toolset", "sh",  "lld-link")
+        toolchain:set("toolset", "ar",  "llvm-ar")
+    else
+        toolchain:set("toolset", "ld",  "link.exe")
+        toolchain:set("toolset", "sh",  "link.exe")
+        toolchain:set("toolset", "ar",  "link.exe")
+    end
 
     -- add vs environments
     local expect_vars = {"PATH", "LIB", "INCLUDE", "LIBPATH"}
@@ -92,7 +99,6 @@ function main(toolchain)
     if target then
         toolchain:add("cxflags", "--target=" .. target)
         toolchain:add("mxflags", "--target=" .. target)
-        toolchain:add("asflags", "--target=" .. target)
     end
 end
 
diff --git a/xmake/toolchains/clang/xmake.lua b/xmake/toolchains/clang/xmake.lua
index ea9406e5c..829413278 100644
--- a/xmake/toolchains/clang/xmake.lua
+++ b/xmake/toolchains/clang/xmake.lua
@@ -56,6 +56,13 @@ toolchain("clang" .. suffix)
     end)
 
     on_load(function (toolchain)
+        import("core.project.project")
+
+        if project.policy("build.optimization.lto") then
+            toolchain:set("toolset", "ar",  "llvm-ar" .. suffix)
+            toolchain:set("toolset", "ranlib",  "llvm-ranlib" .. suffix)
+        end
+
         local march
         if toolchain:is_arch("x86_64", "x64") then
             march = "-m64"