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Merge "Add opt-in option to turn on ThinLTO caching"

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This commit is contained in:
Yi Kong
2018-03-19 22:03:15 +00:00
committed by Gerrit Code Review
parent 4d693a7a27 8aeaa7158a
commit 04a0fe3245
1 changed files with 15 additions and 0 deletions
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15
cc/lto.go
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@@ -74,12 +74,27 @@ func (lto *lto) flags(ctx BaseModuleContext, flags Flags) Flags {
var ltoFlag string
if Bool(lto.Properties.Lto.Thin) {
ltoFlag = "-flto=thin"
} else {
ltoFlag = "-flto"
}
flags.CFlags = append(flags.CFlags, ltoFlag)
flags.LdFlags = append(flags.LdFlags, ltoFlag)
if ctx.Config().IsEnvTrue("USE_THINLTO_CACHE") && Bool(lto.Properties.Lto.Thin) {
// Set appropriate ThinLTO cache policy
cacheDirFormat := "-Wl,-plugin-opt,cache-dir="
cacheDir := android.PathForOutput(ctx, "thinlto-cache").String()
flags.LdFlags = append(flags.LdFlags, cacheDirFormat+cacheDir)
// Limit the size of the ThinLTO cache to the lesser of 10% of available
// disk space and 10GB.
cachePolicyFormat := "-Wl,-plugin-opt,cache-policy="
policy := "cache_size=10%:cache_size_bytes=10g"
flags.LdFlags = append(flags.LdFlags, cachePolicyFormat+policy)
}
if ctx.Device() {
// Work around bug in Clang that doesn't pass correct emulated
// TLS option to target. See b/72706604 or