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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, Xmake Open Source Community.
--
-- @author ruki, Arthapz
-- @file clang/scanner.lua
--
-- imports
import("core.base.json")
import("core.base.semver")
import("core.base.option")
import("core.project.depend")
import("utils.progress")
import("support")
import(".scanner", {inherit = true})
-- scan module dependencies
function scan_dependency_for(target, sourcefile, opt)
local compinst = target:compiler("cxx")
local changed = false
local dependfile = target:dependfile(sourcefile)
local compflags = compinst:compflags({sourcefile = sourcefile, target = target, sourcekind = "cxx"})
depend.on_changed(function()
if opt.progress and not os.getenv("XMAKE_IN_COMPILE_COMMANDS_PROJECT_GENERATOR") then
progress.show(opt.progress, "${clear}${color.build.target}<%s> generating.module.deps %s", target:fullname(), sourcefile)
end
local outputdir = support.get_outputdir(target, sourcefile, {scan = true})
local jsonfile = path.translate(path.join(outputdir, path.filename(sourcefile) .. ".json"))
local has_clangscandepssupport = support.has_clangscandepssupport(target)
local fallbackscanner = target:policy("build.c++.modules.fallbackscanner") or
target:policy("build.c++.modules.clang.fallbackscanner") or
target:policy("build.c++.clang.fallbackscanner")
if has_clangscandepssupport and not fallbackscanner then
-- We need absolute path of clang to use clang-scan-deps
-- See https://clang.llvm.org/docs/StandardCPlusPlusModules.html#possible-issues-failed-to-find-system-headers
local clang_path = compinst:program()
if not path.is_absolute(clang_path) then
clang_path = support.get_clang_path(target) or compinst:program()
end
local clangscandeps = support.get_clang_scan_deps(target)
local dependency_flags = table.join({"--format=p1689", "--",
clang_path, "-x", "c++"}, compflags, {"-c", sourcefile, "-o", target:objectfile(sourcefile)})
if option.get("verbose") then
print(os.args(table.join(clangscandeps, dependency_flags)))
end
local outdata, errdata = os.iorunv(clangscandeps, dependency_flags)
assert(outdata, errdata)
io.writefile(jsonfile, outdata)
else
if not has_clangscandepssupport then
wprint("No clang-scan-deps found ! using fallback scanner")
end
fallback_generate_dependencies(target, jsonfile, sourcefile, function(file)
local keepsystemincludesflag = support.get_keepsystemincludesflag(target)
local compflags = table.clone(compflags)
-- exclude -fmodule* and -std=c++/gnu++* flags because
-- when they are set clang try to find bmi of imported modules but they don't exists in this point of compilation
table.remove_if(compflags, function(_, flag)
return flag:startswith("-fmodule") or flag:startswith("-fvisibility") or flag:startswith("-std=c++") or flag:startswith("-std=gnu++")
end)
local ifile = path.translate(path.join(outputdir, path.filename(file) .. ".i"))
compflags = table.join(compflags or {}, keepsystemincludesflag or {}, {"-E", "-x", "c++", file, "-o", ifile})
os.vrunv(compinst:program(), compflags)
local content = io.readfile(ifile)
os.rm(ifile)
return content
end)
end
changed = true
local rawdependinfo = io.readfile(jsonfile)
return {moduleinfo = rawdependinfo}
end, {dependfile = dependfile, files = {sourcefile}, changed = target:is_rebuilt(), values = compflags})
return changed
end
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