From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtp29.i.mail.ru (smtp29.i.mail.ru [94.100.177.89]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dev.tarantool.org (Postfix) with ESMTPS id 6510D469719 for ; Thu, 12 Mar 2020 13:05:58 +0300 (MSK) From: Olga Arkhangelskaia Date: Thu, 12 Mar 2020 13:05:49 +0300 Message-Id: <20200312100549.31608-1-arkholga@tarantool.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: [Tarantool-patches] [PATCH] cmake: add LTO support for building luajit List-Id: Tarantool development patches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: tarantool-patches@dev.tarantool.org Tarantool has LTO support, however while building luajit this opt. was omitted. Patch adds necessary flag to turn it on. Minimum compiler/linker versions: clang 3.4, gcc 5.0+, ld 2.27+. Closes #3743 --- Branch: OKriw/gh-3743-LuaJIT-does-not-use-LTO-with-DENABLE_LTO=ON-full-ci cmake/lto.cmake | 3 ++- cmake/luajit.cmake | 26 ++++++++++++++++++++++++++ 2 files changed, 28 insertions(+), 1 deletion(-) diff --git a/cmake/lto.cmake b/cmake/lto.cmake index 95ade75f4..9f29f3324 100644 --- a/cmake/lto.cmake +++ b/cmake/lto.cmake @@ -78,7 +78,8 @@ if (NOT TARGET_OS_DARWIN) if (linker_version VERSION_LESS "2.31") message(FATAL_ERROR "ld.bfd >= 2.31 is needed for LTO") endif() - elseif(matched_gold) + + elseif(matched_gold) set(linker_version ${CMAKE_MATCH_1}) message(STATUS "Found ld.gold version: ${linker_version}") diff --git a/cmake/luajit.cmake b/cmake/luajit.cmake index 072db8269..da1b4926d 100644 --- a/cmake/luajit.cmake +++ b/cmake/luajit.cmake @@ -225,6 +225,32 @@ macro(luajit_build) set(luajit_xcflags ${luajit_xcflags} -D${def}) endforeach() + # Add LTO option to luajit + if (CMAKE_INTERPROCEDURAL_OPTIMIZATION) + message("Setting LTO flags for building luajit") + # Clang opt to support LTO + if (CMAKE_COMPILER_IS_CLANG AND + NOT ${CMAKE_CXX_COMPILER_VERSION} VERSION_LESS 3.4) + if (${CMAKE_CXX_COMPILER_VERSION} VERSION_LESS 3.9) + set(luajit_cflags ${luajit_cflags} -flto=full) + else() + set(luajit_cflags ${luajit_cflags} -flto=full) + endif() + if (NOT TARGET_OS_DARWIN) + # Depending of compiler we need to set appropriate llvm/gcc-ar lib + set (CMAKE_AR llvm-ar) + endif() + # GNU opts to support lto + else() + #Due to some problems (bugs, slow work, etc) we support LTO only for 5.0+ + #The same is for binutils prior 2.27 + if (NOT ${CMAKE_CXX_COMPILER_VERSION} VERSION_LESS 5.0 + AND NOT ${linker_version} VERSION_LESS 2.27) + set(luajit_cflags ${luajit_cflags} -flto -fuse-linker-plugin -fno-fat-lto-objects) + endif() + set (CMAKE_AR gcc-ar) + endif() + endif() # Pass the same toolchain that is used for building of # tarantool itself, because tools from different toolchains # can be incompatible. A compiler and a linker are already set -- 2.20.1 (Apple Git-117)