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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 merge_staticlib.lua
--
-- imports
import("core.base.option")
import("private.tools.vstool")
-- merge *.a archive libraries using libtool
function _merge_for_ar_libtool(target, program, outputfile, libraryfiles, opt)
os.vrunv("libtool", table.join("-static", "-o", outputfile, libraryfiles))
end
-- merge *.a archive libraries using fallback method (extract and repack)
-- Used for platforms where ar does not support -M option (e.g., Solaris)
function _merge_for_ar_fallback(target, program, outputfile, libraryfiles, opt)
-- we need to handle duplicate object file names by adding prefixes
-- convert all library files to absolute paths before changing directory
local libraryfiles_abs = {}
for _, libraryfile in ipairs(libraryfiles) do
if os.isfile(libraryfile) then
table.insert(libraryfiles_abs, path.absolute(libraryfile))
end
end
if #libraryfiles_abs == 0 then
return
end
local tmpdir = os.tmpfile() .. ".dir"
os.mkdir(tmpdir)
-- check for duplicate object file names and warn
for idx, libraryfile_abs in ipairs(libraryfiles_abs) do
local list = os.iorunv(program, {"-t", libraryfile_abs}, {curdir = tmpdir})
if list then
local seen_files = {}
local duplicates = {}
for _, line in ipairs(list:split("\n")) do
line = line:trim()
if line:endswith(".o") then
if seen_files[line] then
if not duplicates[line] then
duplicates[line] = {}
end
table.insert(duplicates[line], libraryfile_abs)
else
seen_files[line] = true
end
end
end
if not table.empty(duplicates) then
local dup_names = table.keys(duplicates)
wprint("duplicate object file names found in %s: %s (some files may be lost during merge)",
path.filename(libraryfile_abs), table.concat(dup_names, ", "))
end
end
end
-- extract and merge all archives
local objectfiles = {}
for idx, libraryfile_abs in ipairs(libraryfiles_abs) do
-- extract all files from this archive
os.vrunv(program, {"-x", libraryfile_abs}, {curdir = tmpdir})
-- collect extracted object files (duplicate names will be overwritten)
for _, objfile in ipairs(os.files(path.join(tmpdir, "*.o"))) do
-- use relative path (filename only) since ar will run with curdir = tmpdir
table.insert(objectfiles, path.filename(objfile))
end
end
-- create new archive with all object files
if #objectfiles > 0 then
os.mkdir(path.directory(outputfile))
local outputfile_abs = path.absolute(outputfile)
-- remove output file if exists to avoid appending
os.tryrm(outputfile_abs)
-- create new archive with -c (create) and -r (replace/insert)
-- use relative paths for object files since curdir = tmpdir
os.vrunv(program, table.join("-cr", outputfile_abs, objectfiles), {curdir = tmpdir})
end
os.rm(tmpdir)
end
-- merge *.a archive libraries for GNU ar (using -M interactive mode)
function _merge_for_ar_gnu(target, program, outputfile, libraryfiles, opt)
-- we can't generate directly to outputfile,
-- because on windows/ndk, llvm-ar.exe may fail to write with no permission, even though it's a writable temp file.
--
-- @see https://github.com/xmake-io/xmake/issues/1973
local archivefile = target.autogenfile and target:autogenfile((hash.uuid(outputfile):gsub("%-", ""))) .. ".a" or (os.tmpfile() .. ".a")
os.mkdir(path.directory(archivefile))
local tmpfile = os.tmpfile()
local mrifile = io.open(tmpfile, "w")
mrifile:print("create %s", archivefile)
for _, libraryfile in ipairs(libraryfiles) do
mrifile:print("addlib %s", libraryfile)
end
mrifile:print("save")
mrifile:print("end")
mrifile:close()
os.vrunv(program, {"-M"}, {stdin = tmpfile})
os.cp(archivefile, outputfile)
os.rm(tmpfile)
os.rm(archivefile)
end
-- merge *.a archive libraries for ar
function _merge_for_ar(target, program, outputfile, libraryfiles, opt)
opt = opt or {}
if target:is_plat("macosx", "iphoneos", "watchos", "appletvos") then
_merge_for_ar_libtool(target, program, outputfile, libraryfiles, opt)
elseif target:is_plat("solaris") then
_merge_for_ar_fallback(target, program, outputfile, libraryfiles, opt)
else
_merge_for_ar_gnu(target, program, outputfile, libraryfiles, opt)
end
end
-- merge *.a archive libraries for msvc/lib.exe
function _merge_for_msvclib(target, program, outputfile, libraryfiles, opt)
opt = opt or {}
vstool.runv(program, table.join("-nologo", "-out:" .. outputfile, libraryfiles), {envs = opt.runenvs})
end
-- merge *.a archive libraries, @note target may be package.
function main(target, outputfile, libraryfiles)
local program, toolname = target:tool("ar")
if program and toolname then
if toolname:find("ar") then
_merge_for_ar(target, program, outputfile, libraryfiles)
elseif toolname == "link" and target:is_plat("windows") then
local msvc
for _, toolchain_inst in ipairs(target:toolchains()) do
if toolchain_inst:name() == "msvc" then
msvc = toolchain_inst
break
end
end
_merge_for_msvclib(target, (program:gsub("link%.exe", "lib.exe")), outputfile, libraryfiles, {runenvs = msvc and msvc:runenvs()})
else
raise("cannot merge (%s): unknown ar tool %s!", table.concat(libraryfiles, ", "), toolname)
end
else
raise("cannot merge (%s): ar not found!", table.concat(libraryfiles, ", "))
end
end
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