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--!A cross-platform build utility based on Lua
--
-- Licensed under the Apache License, Version 2.0 (the "License");
-- you may not use this file except in compliance with the License.
-- You may obtain a copy of the License at
--
-- http://www.apache.org/licenses/LICENSE-2.0
--
-- Unless required by applicable law or agreed to in writing, software
-- distributed under the License is distributed on an "AS IS" BASIS,
-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-- See the License for the specific language governing permissions and
-- limitations under the License.
--
-- Copyright (C) 2015-present, TBOOX Open Source Group.
--
-- @author ruki, Arthapz
-- @file xmake.lua
--
-- define rule: c++.build.modules
rule("c++.build.modules")
-- @note common.contains_modules() need it
set_extensions(".mpp", ".mxx", ".cppm", ".ixx")
add_deps("c++.build.modules.builder")
add_deps("c++.build.modules.install")
on_config(function (target)
import("modules_support.compiler_support")
-- we disable to build across targets in parallel, because the source files may depend on other target modules
-- @see https://github.com/xmake-io/xmake/issues/1858
if compiler_support.contains_modules(target) then
-- @note this will cause cross-parallel builds to be disabled for all sub-dependent targets,
-- even if some sub-targets do not contain C++ modules.
--
-- maybe we will have a more fine-grained configuration strategy to disable it in the future.
target:set("policy", "build.across_targets_in_parallel", false)
-- disable ccache for this target
--
-- Caching can affect incremental compilation, for example
-- by interfering with the results of depfile generation for msvc.
--
-- @see https://github.com/xmake-io/xmake/issues/3000
target:set("policy", "build.ccache", false)
-- load compiler support
compiler_support.load(target)
-- mark this target with modules
target:data_set("cxx.has_modules", true)
end
end)
-- build modules
rule("c++.build.modules.builder")
set_sourcekinds("cxx")
set_extensions(".mpp", ".mxx", ".cppm", ".ixx")
-- parallel build support to accelerate `xmake build` to build modules
before_build_files(function(target, batchjobs, sourcebatch, opt)
if target:data("cxx.has_modules") then
import("modules_support.compiler_support")
import("modules_support.dependency_scanner")
import("modules_support.builder")
-- add target deps modules
if target:orderdeps() then
local deps_sourcefiles = dependency_scanner.get_targetdeps_modules(target)
if deps_sourcefiles then
table.join2(sourcebatch.sourcefiles, deps_sourcefiles)
end
end
-- append std module
local std_modules = compiler_support.get_stdmodules(target)
if std_modules then
table.join2(sourcebatch.sourcefiles, std_modules)
target:fileconfig_set(std_modules[1], {external = true})
target:fileconfig_set(std_modules[2], {external = true})
end
-- extract packages modules dependencies
local package_modules_data = dependency_scanner.get_all_packages_modules(target, opt)
if package_modules_data then
-- append to sourcebatch
for _, package_module_data in table.orderpairs(package_modules_data) do
table.insert(sourcebatch.sourcefiles, package_module_data.file)
target:fileconfig_set(package_module_data.file, {external = true, defines = package_module_data.metadata.defines})
end
end
opt.batchjobs = true
compiler_support.patch_sourcebatch(target, sourcebatch, opt)
local modules = dependency_scanner.get_module_dependencies(target, sourcebatch, opt)
-- avoid linking culled objectfiles
sourcebatch.objectfiles = dependency_scanner.sort_modules_by_dependencies(sourcebatch.objectfiles, modules)
-- build modules
builder.build_modules_for_batchjobs(target, batchjobs, sourcebatch, modules, opt)
-- build headerunits and we need to do it before building modules
builder.build_headerunits_for_batchjobs(target, batchjobs, sourcebatch, modules, opt)
-- cull external modules objectfile
compiler_support.cull_objectfiles(target, modules, sourcebatch)
else
-- avoid duplicate linking of object files of non-module programs
sourcebatch.objectfiles = {}
end
end, {batch = true})
-- serial compilation only, usually used to support project generator
before_buildcmd_files(function(target, batchcmds, sourcebatch, opt)
if target:data("cxx.has_modules") then
import("modules_support.compiler_support")
import("modules_support.dependency_scanner")
import("modules_support.builder")
-- add target deps modules
if target:orderdeps() then
local deps_sourcefiles = dependency_scanner.get_targetdeps_modules(target)
if deps_sourcefiles then
table.join2(sourcebatch.sourcefiles, deps_sourcefiles)
end
end
-- append std module
local std_modules = compiler_support.get_stdmodules(target)
if std_modules then
table.join2(sourcebatch.sourcefiles, std_modules)
target:fileconfig_set(std_modules[1], {external = true})
target:fileconfig_set(std_modules[2], {external = true})
end
-- extract packages modules dependencies
local package_modules_data = dependency_scanner.get_all_packages_modules(target, opt)
if package_modules_data then
-- append to sourcebatch
for _, package_module_data in table.orderpairs(package_modules_data) do
table.insert(sourcebatch.sourcefiles, package_module_data.file)
target:fileconfig_set(package_module_data.file, {external = true, defines = package_module_data.metadata.defines})
end
end
opt.batchjobs = false
compiler_support.patch_sourcebatch(target, sourcebatch, opt)
local modules = dependency_scanner.get_module_dependencies(target, sourcebatch, opt)
-- avoid linking culled objectfiles
sourcebatch.objectfiles = dependency_scanner.sort_modules_by_dependencies(sourcebatch.objectfiles, modules)
-- build headerunits
builder.build_headerunits_for_batchcmds(target, batchcmds, sourcebatch, modules, opt)
-- build modules
builder.build_modules_for_batchcmds(target, batchcmds, sourcebatch, modules, opt)
-- cull external modules objectfile
compiler_support.cull_objectfiles(target, modules, sourcebatch)
else
-- avoid duplicate linking of object files of non-module programs
sourcebatch.objectfiles = {}
end
end)
after_clean(function (target)
import("core.base.option")
import("modules_support.compiler_support")
import("private.action.clean.remove_files")
-- we cannot use target:data("cxx.has_modules"),
-- because on_config will be not called when cleaning targets
if compiler_support.contains_modules(target) then
remove_files(compiler_support.modules_cachedir(target))
if option.get("all") then
remove_files(compiler_support.stlmodules_cachedir(target))
compiler_support.localcache():clear()
compiler_support.localcache():save()
end
end
end)
-- install modules
rule("c++.build.modules.install")
set_extensions(".mpp", ".mxx", ".cppm", ".ixx")
before_install(function (target)
import("modules_support.compiler_support")
-- we cannot use target:data("cxx.has_modules"),
-- because on_config will be not called when installing targets
if compiler_support.contains_modules(target) then
compiler_support.install_module_target(target)
end
end)
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