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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
-- @file has_flags.lua
--
-- imports
import("core.language.language")
import("core.cache.global_detectcache")
import("core.base.hashset")
-- attempt to check it from known flags
function _check_from_knownargs(flags, opt)
local flag = flags[1]:gsub("/", "-")
local known_flags = _g.known_flags
if known_flags == nil then
known_flags = hashset.from({"-Ox", "-O1", "-O2", "-Od", "-MT", "-MD", "-MTd", "-MDd", "-EHsc"})
_g.known_flags = known_flags
end
if known_flags:has(flag) then
return true
end
if flag:startswith("-D") or
flag:startswith("-U") or
flag:startswith("-I") then
return true
end
end
-- attempt to check it from the argument list
function _check_from_arglist(flags, opt)
local key = "core.tools.cl.has_flags"
local flagskey = opt.program .. "_" .. (opt.programver or "")
local allflags = global_detectcache:get2(key, flagskey)
if not allflags then
allflags = {}
local arglist = os.iorunv(opt.program, {"-?"}, {envs = opt.envs})
if arglist then
for arg in arglist:gmatch("(/[%-%a%d]+)%s+") do
allflags[arg:gsub("/", "-")] = true
end
end
global_detectcache:set2(key, flagskey, allflags)
global_detectcache:save()
end
local flag = flags[1]:gsub("/", "-")
if flag:startswith("-D") or flag:startswith("-I") then
return true
end
return allflags[flag]
end
-- get extension
function _get_extension(opt)
return opt.flagkind == "cxxflags" and ".cpp" or (table.wrap(language.sourcekinds()[opt.toolkind or "cc"])[1] or ".c")
end
-- try running to check flags
function _check_try_running(flags, opt)
-- make an stub source file
local snippet = opt.snippet or "int main(int argc, char** argv)\n{return 0;}\n"
local sourcefile = os.tmpfile("cl_has_flags:" .. snippet) .. _get_extension(opt)
if not os.isfile(sourcefile) then
io.writefile(sourcefile, snippet)
end
-- check it
local errors = nil
return try { function ()
local tmpdir = os.tmpdir()
local nuldev = os.nuldev()
local tmpfile
if not is_host("windows") then
tmpfile = os.tmpfile()
nuldev = tmpfile
end
local _, errs = os.iorunv(opt.program, table.join("-c", "-nologo", flags, "-Fo" .. nuldev, sourcefile),
{envs = opt.envs, curdir = tmpdir}) -- we need to switch to tmpdir to avoid generating some tmp files, e.g. /Zi -> vc140.pdb
if tmpfile then
os.tryrm(tmpfile)
end
if errs and #errs:trim() > 0 then
return false, errs
end
return true
end,
catch { function (errs) errors = errs end }
}, errors
end
-- has_flags(flags)?
--
-- @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(flags, opt)
-- attempt to check it from the argument list
opt = opt or {}
if not opt.tryrun then
if _check_from_knownargs(flags, opt) then
return true
end
if _check_from_arglist(flags, opt) then
return true
end
end
-- try running to check it
return _check_try_running(flags, opt)
end
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