Enable LTO
This commit is contained in:
Lars Tangvald
Michal Schorm
parent
0904309450
commit
c10b1b71d6
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@ -0,0 +1,119 @@
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commit dfd43f7d5527680fd27a29c80e8eb3b9b5165220
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Author: Tor Didriksen <tor.didriksen@oracle.com>
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Date: Mon Aug 3 16:39:21 2020 +0200
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Bug #31701553 CMAKE CODE TO DISABLE LTO IS TOO SIMPLE
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Parts of our codebase (3rd party libraries) fail to compile/link if built with -flto.
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For these we simply remove "-flto[=n|auto|jobserver] from
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CMAKE_C_FLAGS and CMAKE_CXX_FLAGS.
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We also disable linkers lld and gold by default if building with
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link-time optimization.
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Change-Id: I84e9f7128a4d263056aa60c188e6430ea7161655
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diff --git a/CMakeLists.txt b/CMakeLists.txt
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index dc118b37472..919e7cbd783 100644
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--- a/CMakeLists.txt
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+++ b/CMakeLists.txt
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@@ -639,6 +639,10 @@ OPTION(WITH_LTO
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${WITH_LTO_DEFAULT}
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)
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+IF(CMAKE_C_FLAGS MATCHES " -flto" OR CMAKE_CXX_FLAGS MATCHES " -flto")
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+ SET(CMAKE_COMPILER_FLAG_WITH_LTO 1)
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+ENDIF()
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+
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include(CheckCSourceCompiles)
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include(CheckCXXSourceCompiles)
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# We need some extra FAIL_REGEX patterns
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@@ -848,7 +852,7 @@ ENDIF()
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# Use lld for Clang if available and not explicitly disabled.
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# Also works for gcc on Debian/Ubuntu. Do 'apt install lld'.
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# LTO build fails with lld, so turn it off by default.
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-IF(LINUX AND NOT WITH_LTO)
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+IF(LINUX AND NOT WITH_LTO AND NOT CMAKE_COMPILER_FLAG_WITH_LTO)
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OPTION(USE_LD_LLD "Use llvm lld linker" ON)
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ELSE()
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OPTION(USE_LD_LLD "Use llvm lld linker" OFF)
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@@ -879,7 +883,11 @@ IF(USE_LD_LLD)
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ENDIF()
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# Use gold on x86 if available and not explicitly disabled.
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-IF(CMAKE_SYSTEM_PROCESSOR STREQUAL "x86_64" AND NOT WIN32)
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+# LTO build fails with gold, so turn it off by default.
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+IF(CMAKE_SYSTEM_PROCESSOR STREQUAL "x86_64"
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+ AND NOT WIN32
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+ AND NOT WITH_LTO
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+ AND NOT CMAKE_COMPILER_FLAG_WITH_LTO)
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OPTION(USE_LD_GOLD "Use GNU gold linker" ON)
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ELSE()
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OPTION(USE_LD_GOLD "Use GNU gold linker" OFF)
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diff --git a/cmake/compile_flags.cmake b/cmake/compile_flags.cmake
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index 053e48b9e70..bb1338ee9f8 100644
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--- a/cmake/compile_flags.cmake
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+++ b/cmake/compile_flags.cmake
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@@ -1,4 +1,4 @@
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-# Copyright (c) 2014, 2019, Oracle and/or its affiliates. All rights reserved.
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+# Copyright (c) 2014, 2020, Oracle and/or its affiliates.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License, version 2.0,
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@@ -83,3 +83,12 @@ FUNCTION(ADD_COMPILE_DEFINITIONS)
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${FILE} PROPERTIES COMPILE_DEFINITIONS "${DEFS}")
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ENDFOREACH()
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ENDFUNCTION()
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+
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+# -flto[=n] or -flto=auto or -flto=jobserver
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+SET(MY_COMPILER_FLAG_FLTO " -flto(=[0-9a-z]+)?")
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+
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+# Remove compiler flag/pattern from CMAKE_C_FLAGS or CMAKE_CXX_FLAGS
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+FUNCTION(REMOVE_CMAKE_COMPILER_FLAGS FLAG_VAR PATTERN)
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+ STRING(REGEX REPLACE "${PATTERN}" "" ${FLAG_VAR} "${${FLAG_VAR}}")
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+ SET(${FLAG_VAR} "${${FLAG_VAR}}" PARENT_SCOPE)
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+ENDFUNCTION()
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diff --git a/extra/icu/CMakeLists.txt b/extra/icu/CMakeLists.txt
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index aa1cfb1a90e..81ef19335a0 100644
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--- a/extra/icu/CMakeLists.txt
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+++ b/extra/icu/CMakeLists.txt
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@@ -1,4 +1,4 @@
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-# Copyright (c) 2017, 2020, Oracle and/or its affiliates. All rights reserved.
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+# Copyright (c) 2017, 2020, Oracle and/or its affiliates.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License, version 2.0,
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@@ -91,8 +91,10 @@ IF(MSVC AND NOT WIN32_CLANG)
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STRING_APPEND(CMAKE_CXX_FLAGS " /wd4229")
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ENDIF()
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-STRING(REPLACE "-flto" "" CMAKE_C_FLAGS "${CMAKE_C_FLAGS}")
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-STRING(REPLACE "-flto" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
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+IF(WITH_ICU STREQUAL "bundled")
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+ REMOVE_CMAKE_COMPILER_FLAGS(CMAKE_C_FLAGS "${MY_COMPILER_FLAG_FLTO}")
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+ REMOVE_CMAKE_COMPILER_FLAGS(CMAKE_CXX_FLAGS "${MY_COMPILER_FLAG_FLTO}")
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+ENDIF()
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ADD_SUBDIRECTORY(source/common)
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ADD_SUBDIRECTORY(source/i18n)
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diff --git a/plugin/innodb_memcached/CMakeLists.txt b/plugin/innodb_memcached/CMakeLists.txt
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index b9d93da5f20..00bbddeb3ec 100644
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--- a/plugin/innodb_memcached/CMakeLists.txt
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+++ b/plugin/innodb_memcached/CMakeLists.txt
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@@ -1,4 +1,4 @@
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-# Copyright (c) 2011, 2019, Oracle and/or its affiliates. All rights reserved.
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+# Copyright (c) 2011, 2020, Oracle and/or its affiliates.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License, version 2.0,
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@@ -76,8 +76,8 @@ IF(WITH_INNODB_MEMCACHED AND UNIX)
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ENDIF()
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# -Werror=lto-type-mismatch for misc functions.
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- STRING(REPLACE "-flto" "" CMAKE_C_FLAGS "${CMAKE_C_FLAGS}")
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- STRING(REPLACE "-flto" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
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+ REMOVE_CMAKE_COMPILER_FLAGS(CMAKE_C_FLAGS "${MY_COMPILER_FLAG_FLTO}")
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+ REMOVE_CMAKE_COMPILER_FLAGS(CMAKE_CXX_FLAGS "${MY_COMPILER_FLAG_FLTO}")
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ADD_SUBDIRECTORY(daemon_memcached)
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ADD_SUBDIRECTORY(innodb_memcache)
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@ -73,7 +73,7 @@
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Name: community-mysql
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Version: 8.0.21
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Release: 6%{?with_debug:.debug}%{?dist}
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Release: 7%{?with_debug:.debug}%{?dist}
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Summary: MySQL client programs and shared libraries
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URL: http://www.mysql.com
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@ -112,6 +112,7 @@ Patch52: %{pkgnamepatch}-sharedir.patch
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Patch55: %{pkgnamepatch}-rpath.patch
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Patch75: %{pkgnamepatch}-arm32-timer.patch
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Patch76: %{pkgnamepatch}-certs-expired.patch
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Patch77: %{pkgnamepatch}-lto.patch
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# Patches taken from boost 1.59
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Patch115: boost-1.58.0-pool.patch
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@ -379,6 +380,7 @@ the MySQL sources.
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%patch55 -p1
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%patch75 -p1
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%patch76 -p1
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%patch77 -p1
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# Patch Boost
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pushd boost/boost_$(echo %{boost_bundled_version}| tr . _)
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@ -451,10 +453,10 @@ cp %{SOURCE2} %{SOURCE3} %{SOURCE10} %{SOURCE11} %{SOURCE12} \
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%{SOURCE14} %{SOURCE15} %{SOURCE17} %{SOURCE18} %{SOURCE31} scripts
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%build
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# This package internally tries to eliminate LTO flags
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# but fails miserably. Just disable for the whole package
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# until the package internals are fixed
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# arm build ends with out of memory error for LTO enabled build
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%ifarch %arm
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%define _lto_cflags %{nil}
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%endif
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# fail quickly and obviously if user tries to build as root
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%if %runselftest
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@ -858,6 +860,10 @@ fi
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%endif
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%changelog
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* Mon Aug 10 2020 Lars Tangvald <lars.tangvald@oracle.com> - 8.0.21-7
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- Use upstream patch to enable LTO
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- Skip LTO on ARM due to out of memory issue
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* Thu Aug 13 2020 Michal Schorm <mschorm@redhat.com> - 8.0.21-6
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- Do a proper out-of-source CMake builds
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- Force the CMake change regarding the in-source builds also to F31 and F32
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