[build] Fix thinlto options for EFI link
This fixes a Zircon build error when using variants=["thinlto"].
Change-Id: Iba6e59ee6d9fa0166ed70562cb9472d4497d5aea
diff --git a/zircon/public/gn/config/lto/BUILD.gn b/zircon/public/gn/config/lto/BUILD.gn
index 327c0eba..12f00504 100644
--- a/zircon/public/gn/config/lto/BUILD.gn
+++ b/zircon/public/gn/config/lto/BUILD.gn
@@ -27,17 +27,28 @@
asmflags = compiler_flags
cflags = compiler_flags
ldflags = compiler_flags
+
+ # These switches have the same meaning but different spellings for
+ # lld-link vs ld.lld.
+ if (current_os == "win") {
+ _jobs = "/opt:lldltojobs="
+ _cache_dir = "/lldltocache:"
+ } else {
+ _jobs = "--thinlto-jobs="
+ _cache_dir = "--thinlto-cache-dir="
+ }
+
ldflags += [
# The ThinLTO driver launches a number of threads in parallel whose
# number is by default equivalent to the number of cores. We need
# to limit the parallelism to avoid aggressive competition between
# different linker jobs.
- "-Wl,--thinlto-jobs=$thinlto_jobs",
+ "-Wl,$_jobs$thinlto_jobs",
# Set the ThinLTO cache directory which is used to cache native
# object files for ThinLTO incremental builds. This directory is
# not managed by Ninja and has to be cleaned manually, but it is
# periodically garbage-collected by the ThinLTO driver.
- "-Wl,--thinlto-cache-dir=$thinlto_cache_dir",
+ "-Wl,$_cache_dir$thinlto_cache_dir",
]
}
