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--!The Make-like Build Utility based on Lua
--
-- Licensed to the Apache Software Foundation (ASF) under one
-- or more contributor license agreements. See the NOTICE file
-- distributed with this work for additional information
-- regarding copyright ownership. The ASF licenses this file
-- to you 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 - 2017, TBOOX Open Source Group.
--
-- @author ruki
-- @file has_flag.lua
--
-- imports
import("lib.detect.cache")
-- attempt to check it from the argument list
function _check_from_arglist(flag, opt)
-- make cache key
local key = "detect.tools.link.has_flag"
-- make flags key
local flagskey = opt.program .. "_" .. (opt.programver or "")
-- load cache
local cacheinfo = cache.load(key)
-- get all flags from argument list
local flags = cacheinfo[flagskey]
if not flags then
-- get argument list
flags = {}
local arglist = nil
try
{
function () os.runv(opt.program, {"-?"}) end,
catch
{
function (errors) arglist = errors end
}
}
if arglist then
for arg in arglist:gmatch("(/[%-%a%d]+)%s+") do
flags[arg:gsub("/", "-"):lower()] = true
end
end
-- save cache
cacheinfo[flagskey] = flags
cache.save(key, cacheinfo)
end
-- ok?
return flags[flag:gsub("/", "-"):lower()]
end
-- try running to check flag
function _check_try_running(flag, opt)
-- make an stub source file
local winmain = flag:lower():find("subsystem:windows")
local sourcefile = path.join(os.tmpdir(), "detect", ifelse(winmain, "winmain_", "") .. "link_has_flag.c")
if not os.isfile(sourcefile) then
if winmain then
io.writefile(sourcefile, "int WinMain(void* instance, void* previnst, char** argv, int argc)\n{return 0;}")
else
io.writefile(sourcefile, "int main(int argc, char** argv)\n{return 0;}")
end
end
-- compile the source file
local objectfile = os.tmpfile() .. ".obj"
local binaryfile = os.tmpfile() .. ".exe"
os.iorunv("cl", {"-c", "-nologo", "-Fo" .. objectfile, sourcefile})
-- try link it
local ok = try { function () os.execv(opt.program, {flag, "-nologo", "-out:" .. binaryfile, objectfile}); return true end }
-- remove files
os.tryrm(objectfile)
os.tryrm(binaryfile)
-- ok?
return ok
end
-- has_flag(flag)?
--
-- @param opt the argument options, .e.g {toolname = "", program = "", programver = "", toolkind = "[cc|cxx|ld|ar|sh|gc|rc|dc|mm|mxx]"}
--
-- @return true or false
--
function main(flag, opt)
-- attempt to check it from the argument list
if _check_from_arglist(flag, opt) then
return true
end
-- try running to check it
return _check_try_running(flag, opt)
end
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