https://github.com/ilovepi updated
https://github.com/llvm/llvm-project/pull/80480
>From 2793f30243a0b93d8a1f52343ab974bf9eef4e03 Mon Sep 17 00:00:00 2001
From: Paul Kirth
Date: Tue, 22 Aug 2023 15:24:03 +
Subject: [PATCH 1/2] [CMAKE] Enable FatLTO as a build option for LLVM
---
@@ -1251,6 +1253,10 @@ elseif(LLVM_ENABLE_LTO)
endif()
endif()
+if(LLVM_ENABLE_FATLTO AND (FUCHSIA OR UNIX))
+append("-ffat-lto-objects" CMAKE_EXE_LINKER_FLAGS
CMAKE_SHARED_LINKER_FLAGS)
ilovepi wrote:
Dang, I thought I had done that. That's probably
@@ -1251,6 +1253,10 @@ elseif(LLVM_ENABLE_LTO)
endif()
endif()
+if(LLVM_ENABLE_FATLTO AND (FUCHSIA OR UNIX))
+append("-ffat-lto-objects" CMAKE_EXE_LINKER_FLAGS
CMAKE_SHARED_LINKER_FLAGS)
petrhosek wrote:
I think you also need to append this flag to
ilovepi wrote:
This speeds up a 2 stage build by about 3 minutes, tests time are still much
closer than expected. Locally I saw a bout a 5-8% speedup to build clang unit
tests, but maybe the unit tests are too small in the overall test regime to
make a difference.
I'll try to collect more
