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windows: use ThinLTO

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Switch Windows builds to use ThinLTO. This gets us closer to using
ThinLTO everywhere.
This commit is contained in:
Ayke van Laethem
2022-05-22 22:59:54 +02:00
committed by Ron Evans
parent 5404c81ffd
commit 7729a36782
2 changed files with 14 additions and 11 deletions
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builder/build.go
+14 -6
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@@ -694,15 +694,23 @@ func Build(pkgName, outpath string, config *compileopts.Config, action func(Buil
config.Options.PrintCommands(config.Target.Linker, ldflags...)
}
if config.UseThinLTO() {
ldflags = append(ldflags,
"-mllvm", "-mcpu="+config.CPU(),
"--lto-O"+strconv.Itoa(optLevel))
if config.GOOS() == "darwin" {
ldflags = append(ldflags, "-mllvm", "-mcpu="+config.CPU())
if config.GOOS() == "windows" {
// Options for the MinGW wrapper for the lld COFF linker.
ldflags = append(ldflags,
"-Xlink=/opt:lldlto="+strconv.Itoa(optLevel),
"--thinlto-cache-dir="+filepath.Join(cacheDir, "thinlto"))
} else if config.GOOS() == "darwin" {
// Options for the ld64-compatible lld linker.
ldflags = append(ldflags, "-cache_path_lto", filepath.Join(cacheDir, "thinlto"))
ldflags = append(ldflags,
"--lto-O"+strconv.Itoa(optLevel),
"-cache_path_lto", filepath.Join(cacheDir, "thinlto"))
} else {
// Options for the ELF linker.
ldflags = append(ldflags, "--thinlto-cache-dir="+filepath.Join(cacheDir, "thinlto"))
ldflags = append(ldflags,
"--lto-O"+strconv.Itoa(optLevel),
"--thinlto-cache-dir="+filepath.Join(cacheDir, "thinlto"),
)
}
if config.CodeModel() != "default" {
ldflags = append(ldflags,