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UEFI Target Groundwork: Add LinkerFlavor compile option (#5465)

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* Add LinkerFlavor so the odd pairing of COFF+Linux is possible (necessary for UEFI)

* But back bits of builder.go that were mistakenly removed

* Update compileopts/config.go

Co-authored-by: Ayke <aykevanlaethem@gmail.com>

* update LinkerFlavor test

---------

Co-authored-by: Ayke <aykevanlaethem@gmail.com>
This commit is contained in:
Matthew Hiles
2026-07-08 04:33:59 -04:00
committed by GitHub
parent 05029c4fb5
commit 2dbfdbae10
4 changed files with 74 additions and 5 deletions
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builder/build.go
+7 -4
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@@ -839,22 +839,25 @@ func Build(pkgName, outpath, tmpdir string, config *compileopts.Config) (BuildRe
}
ldflags = append(ldflags, "-mllvm", "-mcpu="+config.CPU())
ldflags = append(ldflags, "-mllvm", "-mattr="+config.Features()) // needed for MIPS softfloat
if config.GOOS() == "windows" {
// Options for the MinGW wrapper for the lld COFF linker.
switch config.LinkerFlavor() {
case "coff":
// Options for driving ld.lld in PE/COFF mode.
ldflags = append(ldflags,
"-Xlink=/opt:lldlto="+strconv.Itoa(speedLevel),
"--thinlto-cache-dir="+filepath.Join(cacheDir, "thinlto"))
} else if config.GOOS() == "darwin" {
case "darwin":
// Options for the ld64-compatible lld linker.
ldflags = append(ldflags,
"--lto-O"+strconv.Itoa(speedLevel),
"-cache_path_lto", filepath.Join(cacheDir, "thinlto"))
} else {
case "gnu":
// Options for the ELF linker.
ldflags = append(ldflags,
"--lto-O"+strconv.Itoa(speedLevel),
"--thinlto-cache-dir="+filepath.Join(cacheDir, "thinlto"),
)
default:
return fmt.Errorf("unknown linker flavor: %s", config.LinkerFlavor())
}
if config.CodeModel() != "default" {
ldflags = append(ldflags,