add llvm for linux (#269)

* add llvm for linux

* improve llvm

* improve llvm for linux

packages/l/llvm/xmake.lua

@@ -25,12 +25,106 @@ package("llvm")
             set_urls("https://github.com/xmake-mirror/llvm-project/releases/download/llvmorg-$(version)/clang+llvm-$(version)-win64.tar.xz")
             add_versions("11.0.0", "de2dce781b70a66c28b389905ae825998b18b33b7b1e3e94f947a2ec57fb328d")
         end
+    elseif is_host("linux") then
+        set_urls("https://github.com/llvm/llvm-project/releases/download/llvmorg-$(version)/llvm-project-$(version).tar.xz")
+        add_versions("11.0.0", "b7b639fc675fa1c86dd6d0bc32267be9eb34451748d2efd03f674b773000e92b")
+    end
+
+    add_configs("clang",                    {description = "Enable clang project.", default = true, type = "boolean"})
+    add_configs("clang-tools-extra",        {description = "Enable extra clang tools project.", default = false, type = "boolean"})
+    add_configs("lld",                      {description = "Enable lld project.", default = false, type = "boolean"})
+    add_configs("lldb",                     {description = "Enable lldb project.", default = false, type = "boolean"})
+    add_configs("openmp",                   {description = "Enable openmp project.", default = false, type = "boolean"})
+    add_configs("polly",                    {description = "Enable polly project.", default = false, type = "boolean"})
+    add_configs("mlir",                     {description = "Enable mlir project.", default = false, type = "boolean"})
+
+    add_configs("compiler-rt",              {description = "Enable compiler-rt runtime.", default = true, type = "boolean"})
+    add_configs("libunwind",                {description = "Enable libunwind runtime.", default = true, type = "boolean"})
+    add_configs("libcxxabi",                {description = "Enable clang runtime.", default = true, type = "boolean"})
+
+    if is_host("linux") then
+        add_deps("libffi", {host = true})
+        add_deps("binutils", {host = true}) -- needed for gold and strip
     end
 
     on_install("@macosx", "@windows", "@msys", "@bsd", function (package)
         os.cp("*", package:installdir())
     end)
 
+    on_load("@linux", function (package)
+        if package:config("openmp") then
+            package:add("deps", "libelf", {host = true})
+        end
+    end)
+
+    on_install("@linux", function (package)
+        local projects = {
+            "clang",
+            "clang-tools-extra",
+            "lld",
+            "lldb",
+            "openmp",
+            "polly",
+            "mlir",
+        }
+        local projects_enabled = {}
+        for _, project in ipairs(projects) do
+            if package:config(project) then
+                table.insert(projects_enabled, project)
+            end
+        end
+        local runtimes = {
+            "compiler-rt",
+            "libunwind",
+            "libcxxabi"
+        }
+        local runtimes_enabled = {}
+        for _, runtime in ipairs(runtimes) do
+            if package:config(runtime) then
+                table.insert(runtimes_enabled, runtime)
+            end
+        end
+        local configs = {
+            "-DCMAKE_BUILD_TYPE=Release",
+            "-DLLVM_ENABLE_PROJECTS=" .. table.concat(projects_enabled, ";"),
+            "-DLLVM_ENABLE_RUNTIMES=" .. table.concat(runtimes_enabled, ";"),
+            "-DLLVM_POLLY_LINK_INTO_TOOLS=ON",
+            "-DLLVM_BUILD_EXTERNAL_COMPILER_RT=ON",
+            "-DLLVM_LINK_LLVM_DYLIB=ON",
+            "-DLLVM_ENABLE_EH=ON",
+            "-DLLVM_ENABLE_FFI=ON",
+            "-DLLVM_ENABLE_RTTI=ON",
+            "-DLLVM_INCLUDE_DOCS=OFF",
+            "-DLLVM_INCLUDE_TESTS=OFF",
+            "-DLLVM_INSTALL_UTILS=ON",
+            "-DLLVM_ENABLE_Z3_SOLVER=OFF",
+            "-DLLVM_OPTIMIZED_TABLEGEN=ON",
+            "-DLLVM_TARGETS_TO_BUILD=all",
+            "-DFFI_INCLUDE_DIR=" .. package:dep("libffi"):installdir("include"),
+            "-DFFI_LIBRARY_DIR=" .. package:dep("libffi"):installdir("lib"),
+            "-DLLDB_USE_SYSTEM_DEBUGSERVER=ON",
+            "-DLLDB_ENABLE_PYTHON=OFF",
+            "-DLLDB_ENABLE_LUA=OFF",
+            "-DLLDB_ENABLE_LZMA=OFF",
+            "-DLIBOMP_INSTALL_ALIASES=OFF",
+            "-DCLANG_PYTHON_BINDINGS_VERSIONS=#{py_ver}"
+        }
+        if package:is_plat("macosx") then
+            table.insert(configs, "-DLLVM_BUILD_LLVM_C_DYLIB=ON")
+            table.insert(configs, "-DLLVM_ENABLE_LIBCXX=ON")
+            table.insert(configs, "-DLLVM_CREATE_XCODE_TOOLCHAIN=ON") -- TODO
+        else
+            table.insert(configs, "-DLLVM_BUILD_LLVM_C_DYLIB=OFF")
+            table.insert(configs, "-DLLVM_ENABLE_LIBCXX=OFF")
+            table.insert(configs, "-DLLVM_CREATE_XCODE_TOOLCHAIN=OFF")
+            table.insert(configs, "-DCLANG_DEFAULT_CXX_STDLIB=libstdc++")
+            -- enable llvm gold plugin for LTO
+            table.insert(configs, "-DLLVM_BINUTILS_INCDIR=" .. package:dep("binutils"):installdir("include"))
+        end
+        os.cd("llvm")
+        import("package.tools.cmake").install(package, configs)
+    end)
+
     on_test(function (package)
         os.vrun("clang --version")
     end)