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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 xmake.lua
--
-- export the given symbols list
--
--@code
-- target("foo")
-- set_kind("shared")
-- add_files("src/foo.c")
-- add_rules("utils.symbols.export_list", {symbols = {
-- "add",
-- "sub"}})
--
-- target("foo2")
-- set_kind("shared")
-- add_files("src/foo.c")
-- add_files("src/foo.export.txt")
-- add_rules("utils.symbols.export_list")
--
rule("utils.symbols.export_list")
set_extensions(".export.txt")
on_config(function (target)
assert(target:is_shared() or (target:is_plat("windows") and target:is_binary()),
'rule("utils.symbols.export_list"): only for binary/shared target(%s)!', target:fullname())
local exportfile
local exportkind
local exportsymbols = target:extraconf("rules", "utils.symbols.export_list", "symbols")
if not exportsymbols then
local sourcebatch = target:sourcebatches()["utils.symbols.export_list"]
if sourcebatch then
for _, sourcefile in ipairs(sourcebatch.sourcefiles) do
local list = io.readfile(sourcefile)
if list then
exportsymbols = list:split("\n")
end
break
end
end
end
assert(exportsymbols and #exportsymbols > 0, 'rule("utils.symbols.export_list"): no exported symbols!')
local linkername = target:linker():name()
if linkername == "dmd" then
if target:is_plat("windows") then
exportkind = "def"
exportfile = path.join(target:autogendir(), "rules", "symbols", "export_list.def")
target:add("shflags", "-L/def:" .. exportfile, {force = true})
target:add("ldflags", "-L/def:" .. exportfile, {force = true})
elseif target:is_plat("macosx", "iphoneos", "watchos", "appletvos") then
exportkind = "apple"
exportfile = path.join(target:autogendir(), "rules", "symbols", "export_list.exp")
target:add("shflags", {"-L-exported_symbols_list", "-L" .. exportfile}, {force = true, expand = false})
elseif target:is_plat("solaris") then
-- Solaris linker does not support --version-script
return
else
exportkind = "ver"
exportfile = path.join(target:autogendir(), "rules", "symbols", "export_list.map")
target:add("shflags", "-L--version-script=" .. exportfile, {force = true})
end
elseif target:has_tool("ld", "link") then
exportkind = "def"
exportfile = path.join(target:autogendir(), "rules", "symbols", "export_list.def")
target:add("shflags", "/def:" .. exportfile, {force = true})
target:add("ldflags", "/def:" .. exportfile, {force = true})
elseif target:is_plat("windows") and target:has_tool("ld", "clangxx") then
exportkind = "def"
exportfile = path.join(target:autogendir(), "rules", "symbols", "export_list.def")
target:add("shflags", "-Wl,/def:" .. exportfile, {force = true})
target:add("ldflags", "-Wl,/def:" .. exportfile, {force = true})
elseif target:is_plat("macosx", "iphoneos", "watchos", "appletvos") then
exportkind = "apple"
exportfile = path.join(target:autogendir(), "rules", "symbols", "export_list.exp")
target:add("shflags", {"-Wl,-exported_symbols_list", exportfile}, {force = true, expand = false})
elseif target:is_plat("solaris") then
-- Solaris linker does not support --version-script
return
elseif target:has_tool("ld", "gcc", "gxx", "clang", "clangxx") or
target:has_tool("sh", "gcc", "gxx", "clang", "clangxx") then
exportkind = "ver"
exportfile = path.join(target:autogendir(), "rules", "symbols", "export_list.map")
target:add("shflags", "-Wl,--version-script=" .. exportfile, {force = true})
elseif target:has_tool("ld", "ld") or target:has_tool("sh", "ld") then
exportkind = "ver"
exportfile = path.join(target:autogendir(), "rules", "symbols", "export_list.map")
target:add("shflags", "--version-script=" .. exportfile, {force = true})
end
if exportfile and exportkind then
local exportfile_tmp = os.tmpfile(exportfile)
os.tryrm(exportfile_tmp)
if exportkind == "ver" then
io.writefile(exportfile_tmp, ([[{
global:
%s
local:
*;
};]]):format(table.concat(exportsymbols, ";\n ") .. ";"))
elseif exportkind == "apple" then
local file = io.open(exportfile_tmp, 'w')
for _, symbol in ipairs(exportsymbols) do
local symbol = symbol
if not symbol:startswith("_") then
symbol = "_" .. symbol
end
file:print("%s", symbol)
end
file:close()
elseif exportkind == "def" then
local file = io.open(exportfile_tmp, 'w')
file:print("EXPORTS")
for _, symbol in ipairs(exportsymbols) do
file:print("%s", symbol)
end
file:close()
end
-- update file if the content is changed
target:data_add("linkdepfiles", exportfile)
if os.isfile(exportfile_tmp) then
os.cp(exportfile_tmp, exportfile, {copy_if_different = true})
end
end
end)
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