5b762044b5
This re-lands r37926 w/ the needed fix for cross-compiles; we can only re-use the default toolchain when the host can actually run it. R=machenbach@chromium.org BUG=629825 Review-Url: https://codereview.chromium.org/2171083003 Cr-Commit-Position: refs/heads/master@{#37970}
90 lines
4.0 KiB
Plaintext
90 lines
4.0 KiB
Plaintext
# Copyright 2015 the V8 project authors. All rights reserved.
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are
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# met:
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#
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# * Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# * Redistributions in binary form must reproduce the above
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# copyright notice, this list of conditions and the following
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# disclaimer in the documentation and/or other materials provided
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# with the distribution.
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# * Neither the name of Google Inc. nor the names of its
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# contributors may be used to endorse or promote products derived
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# from this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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import("//build/config/v8_target_cpu.gni")
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declare_args() {
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# The snapshot needs to be compiled for the host, but compiled with
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# a toolchain that matches the bit-width of the target.
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v8_snapshot_toolchain = ""
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}
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# TODO(GYP): For now we only support 32-bit little-endian target builds from an
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# x64 Linux host. Eventually we need to support all of the host/target
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# configurations v8 runs on.
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if (v8_snapshot_toolchain == "") {
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if (host_cpu == "x64" && host_os == "linux") {
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if (v8_current_cpu == v8_target_cpu && current_cpu == target_cpu &&
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(target_cpu == "x86" || target_cpu == "x64")) {
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# Args that are specified by the user can end up having the same
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# effect as args that are specified in a toolchain; for example,
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# building on linux x64 with target_cpu == "x86" v8_target_cpu == "arm"
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# will use the //build/toolchain/linux:clang_x86 toolchain, but have the
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# same effect as if you specified
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#
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# custom_toolchain="//build/toolchain/linux:clang_x86_v8_arm"
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#
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# As a result, if we didn't take that into account we could
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# accidentally end up building two identical copies of v8.
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#
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# So, we can re-use the default toolchain for the snapshot in these
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# casees, but only when the host is actually capable of running the
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# target code, which at this time means that the target_cpu == x86
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# or x64.
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v8_snapshot_toolchain = default_toolchain
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} else {
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if (current_cpu == "arm" || current_cpu == "mipsel" ||
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current_cpu == "x86") {
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_snapshot_cpu = "x86"
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} else {
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assert(current_cpu == "arm64" || current_cpu == "x64" ||
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current_cpu == "mips64el",
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"Need environment for this arch: $current_cpu")
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_snapshot_cpu = "x64"
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}
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if (v8_current_cpu != _snapshot_cpu) {
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_cpus = "${_snapshot_cpu}_v8_${v8_current_cpu}"
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} else {
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_cpus = _snapshot_cpu
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}
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if ((host_os == "linux" && current_os == "android") || is_clang) {
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v8_snapshot_toolchain = "//build/toolchain/linux:clang_${_cpus}"
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} else {
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v8_snapshot_toolchain = "//build/toolchain/linux:${_cpus}"
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}
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}
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} else if (host_os == "mac" && current_os == "win") {
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assert(v8_current_cpu == current_cpu,
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"v8 target must match the regular target on this platform")
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v8_snapshot_toolchain = "//build/toolchain/mac:clang_$current_cpu"
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} else {
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v8_snapshot_toolchain = default_toolchain
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}
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}
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