72 lines
2.7 KiB
Text
72 lines
2.7 KiB
Text
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# Copyright (c) 2023 Microsoft, GmbH
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# Use of this source code is governed by the MIT license that can be
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# found in the LICENSE file.
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declare_args() {
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electron_js2c_toolchain = ""
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}
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if (electron_js2c_toolchain == "") {
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if (current_os == host_os && current_cpu == host_cpu) {
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# This is not a cross-compile, so build the snapshot with the current
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# toolchain.
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electron_js2c_toolchain = current_toolchain
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} else if (current_os == host_os && current_cpu == "x86" &&
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host_cpu == "x64") {
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# This is an x64 -> x86 cross-compile, but x64 hosts can usually run x86
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# binaries built for the same OS, so build the snapshot with the current
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# toolchain here, too.
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electron_js2c_toolchain = current_toolchain
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} else if (current_os == host_os && host_cpu == "arm64" &&
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current_cpu == "arm") {
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# Trying to compile 32-bit arm on arm64. Good luck!
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electron_js2c_toolchain = current_toolchain
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} else if (host_cpu == current_cpu) {
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# Cross-build from same ISA on one OS to another. For example:
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# * targeting win/x64 on a linux/x64 host
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# * targeting win/arm64 on a mac/arm64 host
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electron_js2c_toolchain = host_toolchain
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} else if (host_cpu == "arm64" && current_cpu == "x64") {
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# Cross-build from arm64 to intel (likely on an Apple Silicon mac).
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electron_js2c_toolchain =
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"//build/toolchain/${host_os}:clang_arm64_v8_$current_cpu"
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} else if (host_cpu == "x64") {
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# This is a cross-compile from an x64 host to either a non-Intel target
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# cpu or to 32-bit x86 on a different target OS.
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assert(current_cpu != "x64", "handled by host_cpu == current_cpu branch")
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if (current_cpu == "x86") {
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_cpus = current_cpu
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} else if (current_cpu == "arm64") {
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if (is_win) {
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# set _cpus to blank for Windows ARM64 so host_toolchain could be
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# selected as snapshot toolchain later.
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_cpus = ""
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} else {
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_cpus = "x64_v8_${current_cpu}"
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}
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} else if (current_cpu == "arm") {
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_cpus = "x86_v8_${current_cpu}"
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} else {
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# This branch should not be reached; leave _cpus blank so the assert
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# below will fail.
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_cpus = ""
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}
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if (_cpus != "") {
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electron_js2c_toolchain = "//build/toolchain/${host_os}:clang_${_cpus}"
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} else if (is_win && current_cpu == "arm64") {
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# cross compile Windows arm64 with host toolchain.
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electron_js2c_toolchain = host_toolchain
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}
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} else if (host_cpu == "arm64" && current_cpu == "arm64" &&
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host_os == "mac") {
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# cross compile iOS arm64 with host_toolchain
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electron_js2c_toolchain = host_toolchain
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}
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}
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assert(electron_js2c_toolchain != "",
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"Do not know how to build js2c for $current_toolchain " +
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"on $host_os $host_cpu")
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