| // Copyright 2019 The ChromiumOS Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| package main |
| |
| func isInConfigureStage(env env) bool { |
| val, present := env.getenv("EBUILD_PHASE") |
| return present && val == "configure" |
| } |
| |
| func processCCacheFlag(builder *commandBuilder) { |
| // We should be able to share the objects across compilers as |
| // the pre-processed output will differ. This allows boards |
| // that share compiler flags (like x86 boards) to share caches. |
| const ccacheDir = "/var/cache/distfiles/ccache" |
| |
| useCCache := true |
| builder.transformArgs(func(arg builderArg) string { |
| if arg.value == "-noccache" { |
| useCCache = false |
| return "" |
| } |
| return arg.value |
| }) |
| |
| // Disable ccache during portage's src_configure phase. Using ccache here is generally a |
| // waste of time, since these files are very small. Experimentally, this speeds up |
| // configuring by ~13%. |
| if isInConfigureStage(builder.env) { |
| useCCache = false |
| } |
| |
| if builder.cfg.useCCache && useCCache { |
| // Note: we used to also set CCACHE_BASEDIR but don't do it |
| // anymore for reasons outlined in crrev.com/c/2103170. |
| if _, present := builder.env.getenv("CCACHE_DISABLE"); present { |
| // Portage likes to set this for us when it has FEATURES=-ccache. |
| // The other vars we need to setup manually because of tools like |
| // scons that scrubs the env before we get executed. |
| builder.updateEnv("CCACHE_DISABLE=") |
| } |
| // If RESTRICT=sandbox is enabled, then sandbox won't be setup, |
| // and the env vars won't be available for appending. |
| if sandboxRewrite, present := builder.env.getenv("SANDBOX_WRITE"); present { |
| builder.updateEnv("SANDBOX_WRITE=" + sandboxRewrite + ":" + ccacheDir) |
| } |
| |
| // Make sure we keep the cached files group writable. |
| builder.updateEnv("CCACHE_DIR="+ccacheDir, "CCACHE_UMASK=002") |
| |
| // ccache may generate false positive warnings. |
| // Workaround bug https://crbug.com/649740 |
| if builder.target.compilerType == clangType { |
| builder.updateEnv("CCACHE_CPP2=yes") |
| } |
| |
| builder.wrapPath("/usr/bin/ccache") |
| } |
| } |