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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, TBOOX Open Source Group.
--
-- @author ruki
-- @file xmake.lua
--
-- build metal files
--
-- @see https://developer.apple.com/documentation/metal/libraries/building_a_library_with_metal_s_command-line_tools
--
rule("xcode.metal")
-- support add_files("*.metal")
set_extensions(".metal")
on_load(function (target)
local cross
if target:is_plat("macosx") then
cross = "xcrun -sdk macosx "
elseif target:is_plat("iphoneos") then
cross = target:is_arch("i386", "x86_64") and "xcrun -sdk iphonesimulator " or "xcrun -sdk iphoneos "
elseif target:is_plat("watchos") then
cross = target:is_arch("i386") and "xcrun -sdk watchsimulator " or "xcrun -sdk watchos "
elseif target:is_plat("appletvos") then
cross = target:is_arch("i386", "x86_64") and "xcrun -sdk appletvsimulator " or "xcrun -sdk appletvos "
else
raise("unknown platform for xcode!")
end
target:data_set("xcode.metal.cross", cross)
end)
-- build *.metal to *.air
on_buildcmd_file(function (target, batchcmds, sourcefile, opt)
-- get metal
import("core.tool.toolchain")
import("lib.detect.find_tool")
local cross = target:data("xcode.metal.cross")
local metal = assert(find_tool("metal", {program = cross .. " metal"}), "metal command not found!")
-- get xcode toolchain
local xcode = toolchain.load("xcode", {plat = target:plat(), arch = target:arch()})
local target_minver = xcode:config("target_minver")
local xcode_sysroot = xcode:config("xcode_sysroot")
-- init metal arguments
local objectfile = target:objectfile(sourcefile) .. ".air"
local argv = {"-c", "-ffast-math", "-gline-tables-only"}
if target_minver then
table.insert(argv, "-target")
local airarch = target:is_arch("x86_64", "arm64") and "air64" or "air32"
if target:is_plat("macosx") then
table.insert(argv, airarch .. "-apple-macos" .. target_minver)
elseif target:is_plat("iphoneos") then
local airtarget = airarch .. "-apple-ios" .. target_minver
if target:is_arch("x86_64", "i386") then
airtarget = airtarget .. "-simulator"
end
table.insert(argv, airtarget)
elseif target:is_plat("watchos") then
local airtarget = airarch .. "-apple-watchos" .. target_minver
if target:is_arch("x86_64", "i386") then
airtarget = airtarget .. "-simulator"
end
table.insert(argv, airtarget)
elseif target:is_plat("appletvos") then
local airtarget = airarch .. "-apple-tvos" .. target_minver
if target:is_arch("x86_64", "i386") then
airtarget = airtarget .. "-simulator"
end
table.insert(argv, airtarget)
end
end
if xcode_sysroot then
table.insert(argv, "-isysroot")
table.insert(argv, xcode_sysroot)
end
table.insert(argv, "-o")
table.insert(argv, objectfile)
table.insert(argv, sourcefile)
-- add commands
batchcmds:show_progress(opt.progress, "${color.build.object}compiling.metal %s", sourcefile)
batchcmds:mkdir(path.directory(objectfile))
batchcmds:vrunv(metal.program, argv)
-- add deps
batchcmds:add_depfiles(sourcefile)
batchcmds:set_depmtime(os.mtime(objectfile))
batchcmds:set_depcache(target:dependfile(objectfile))
end)
-- link *.air to *.metallib
before_linkcmd(function (target, batchcmds, opt)
-- get objectfiles
local objectfiles = {}
for rulename, sourcebatch in pairs(target:sourcebatches()) do
if rulename == "xcode.metal" then
for _, sourcefile in ipairs(sourcebatch.sourcefiles) do
table.insert(objectfiles, target:objectfile(sourcefile) .. ".air")
end
break
end
end
if #objectfiles == 0 then
return
end
-- get metallib
import("core.tool.toolchain")
import("lib.detect.find_tool")
local cross = target:data("xcode.metal.cross")
local metallib = assert(find_tool("metallib", {program = cross .. " metallib"}), "metallib command not found!")
-- get xcode toolchain
local xcode = toolchain.load("xcode", {plat = target:plat(), arch = target:arch()})
local xcode_sysroot = xcode:config("xcode_sysroot")
-- add commands
local resourcesdir = path.absolute(target:data("xcode.bundle.resourcesdir"))
local libraryfile = resourcesdir and path.join(resourcesdir, "default.metallib") or (target:targetfile() .. ".metallib")
batchcmds:show_progress(opt.progress, "${color.build.target}linking.metal %s", path.filename(libraryfile))
batchcmds:mkdir(path.directory(libraryfile))
batchcmds:vrunv(metallib.program, table.join({"-o", libraryfile}, objectfiles), {envs = {SDKROOT = xcode_sysroot}})
-- add deps
batchcmds:add_depfiles(objectfiles)
batchcmds:set_depmtime(os.mtime(libraryfile))
batchcmds:set_depcache(target:dependfile(libraryfile))
end)
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