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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 luzhlon
-- @file compile_flags.lua
--
-- imports
import("core.tool.compiler")
import("core.project.project")
import("core.language.language")
import("private.utils.target", {alias = "target_utils"})
import("plugins.project.utils.target_cmds", {rootdir = os.programdir()})
-- make the object
function _make_object(target, flags, sourcefile, objectfile)
-- get the source file kind
local sourcekind = language.sourcekind_of(sourcefile)
-- get compile arguments
local arguments = compiler.compflags(sourcefile, {target = target})
for i, flag in ipairs(arguments) do
-- only export the -I*/-D* flags
if flag == "-I" or flag == "/I" or flag == "-isystem" then
table.insert(flags, flag .. arguments[i + 1])
elseif flag:find('^-[ID]') or flag:find("-isystem", 1, true) then
table.insert(flags, flag)
end
end
-- clear first line marks
_g.firstline = false
end
-- make objects
function _make_objects(target, flags, sourcekind, sourcebatch)
for index, objectfile in ipairs(sourcebatch.objectfiles) do
_make_object(target, flags, sourcebatch.sourcefiles[index], objectfile)
end
end
-- make target
function _make_target(target, flags)
-- TODO
-- disable precompiled header first
target:set("pcheader", nil)
target:set("pcxxheader", nil)
-- build source batches
for _, sourcebatch in pairs(target:sourcebatches()) do
local sourcekind = sourcebatch.sourcekind
if sourcekind then
_make_objects(target, flags, sourcekind, sourcebatch)
end
end
end
-- make all
function _make_all(flags)
_g.firstline = true
local project_targets = target_utils.get_project_targets()
for _, target in pairs(project_targets) do
if not target:is_phony() and target:is_default() then
_make_target(target, flags)
end
end
return table.unique(flags)
end
-- generate compilation databases for clang-based tools(compile_flags.txt)
--
-- references:
-- - https://clang.llvm.org/docs/JSONCompilationDatabase.html
--
function make(outputdir)
local oldir = os.cd(os.projectdir())
-- prepare targets
target_cmds.prepare_targets()
-- make all
local flags = {}
flags = _make_all(flags)
-- write to file
local flagfile = io.open(path.join(outputdir, "compile_flags.txt"), "w")
for i, flag in ipairs(flags) do
flagfile:write(flag, '\n')
end
flagfile:close()
os.cd(oldir)
end
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