From 01c82b945d209f3b7481b5be350c33002fb1b103 Mon Sep 17 00:00:00 2001 From: Allan Sandfeld Jensen Date: Tue, 1 Jul 2014 11:46:50 +0200 Subject: Introduce qmake feature use_gold_linker This patch adds the feature use_gold_linker to use the gold linker that has been part of of GNU binutils since 2008. Gold links C++ libraries much faster and use less memory. The feature is autodetected when building Qt on Linux, but can be disabled in configure. On MingW builds it is default off but can be enabled for cross builds. Change-Id: Icdd6ba2e706b2c791bcf44b6e718c2b7a5eb2218 Reviewed-by: Oswald Buddenhagen Reviewed-by: Thiago Macieira --- configure | 26 ++++++++++++++++++++++++++ mkspecs/common/gcc-base-unix.conf | 1 + mkspecs/features/default_post.prf | 2 ++ mkspecs/win32-g++/qmake.conf | 1 + tools/configure/configureapp.cpp | 12 ++++++++++++ 5 files changed, 42 insertions(+) diff --git a/configure b/configure index 96cc82bd58..9ac4bfadb6 100755 --- a/configure +++ b/configure @@ -698,6 +698,7 @@ CFG_INOTIFY=auto CFG_EVENTFD=auto CFG_RPATH=yes CFG_FRAMEWORK=auto +CFG_USE_GOLD_LINKER=auto DEFINES= INCLUDES= D_FLAGS= @@ -1592,6 +1593,13 @@ while [ "$#" -gt 0 ]; do UNKNOWN_OPT=yes fi ;; + use-gold-linker) + if [ "$VAL" = "yes" ] || [ "$VAL" = "no" ]; then + CFG_USE_GOLD_LINKER="$VAL" + else + UNKNOWN_OPT=yes + fi + ;; zlib) [ "$VAL" = "qt" ] && VAL=yes if [ "$VAL" = "yes" ] || [ "$VAL" = "no" ] || [ "$VAL" = "system" ]; then @@ -2465,6 +2473,9 @@ Additional options: linker optimizations (Qt/X11 and Qt for Embedded Linux only; experimental; needs GNU ld >= 2.18). + -no-use-gold-linker ..... Do not link using the GNU gold linker. + + -use-gold-linker ........ Link using the GNU gold linker if available. + -force-asserts ........ Force Q_ASSERT to be enabled even in release builds. -device ............... Cross-compile for device (experimental) @@ -3230,6 +3241,19 @@ if [ "$CFG_REDUCE_EXPORTS" != "no" ]; then fi fi +# auto-detect -fuse-ld=gold support +if [ "$CFG_USE_GOLD_LINKER" != "no" ]; then + if linkerSupportsFlag $TEST_COMPILER -fuse-ld=gold; then + CFG_USE_GOLD_LINKER=yes + else + if [ "$CFG_USE_GOLD_LINKER" = "yes" ]; then + echo "-use-gold-linker was requested but this compiler does not support it" + exit 1 + fi + CFG_USE_GOLD_LINKER=no + fi +fi + # auto-detect -fstack-protector-strong support (for QNX only currently) if [ "$XPLATFORM_QNX" = "yes" ]; then if compilerSupportsFlag $TEST_COMPILER -fstack-protector-strong; then @@ -5598,6 +5622,7 @@ fi [ "$CFG_REDUCE_RELOCATIONS" = "yes" ] && QT_CONFIG="$QT_CONFIG reduce_relocations" [ "$CFG_STRIP" = "no" ] && QMAKE_CONFIG="$QMAKE_CONFIG nostrip" [ "$CFG_PRECOMPILE" = "yes" ] && QMAKE_CONFIG="$QMAKE_CONFIG precompile_header" +[ "$CFG_USE_GOLD_LINKER" = "yes" ] && QMAKE_CONFIG="$QMAKE_CONFIG use_gold_linker" if [ "$CFG_SEPARATE_DEBUG_INFO" = "yes" ]; then QT_CONFIG="$QT_CONFIG separate_debug_info" fi @@ -6472,6 +6497,7 @@ else fi unset build_mode release echo " Using C++11 ............ $CFG_CXX11" +echo " Using gold linker....... $CFG_USE_GOLD_LINKER" echo " Using PCH .............. $CFG_PRECOMPILE" echo " Target compiler supports:" if [ "$CFG_ARCH" = "i386" -o "$CFG_ARCH" = "x86_64" ]; then diff --git a/mkspecs/common/gcc-base-unix.conf b/mkspecs/common/gcc-base-unix.conf index 84ef88aa4f..29e0521927 100644 --- a/mkspecs/common/gcc-base-unix.conf +++ b/mkspecs/common/gcc-base-unix.conf @@ -16,6 +16,7 @@ QMAKE_LFLAGS_SONAME += -Wl,-soname, QMAKE_LFLAGS_THREAD += QMAKE_LFLAGS_RPATH = -Wl,-rpath, QMAKE_LFLAGS_RPATHLINK = -Wl,-rpath-link, +QMAKE_LFLAGS_USE_GOLD = -fuse-ld=gold # -Bsymbolic-functions (ld) support QMAKE_LFLAGS_BSYMBOLIC_FUNC = -Wl,-Bsymbolic-functions diff --git a/mkspecs/features/default_post.prf b/mkspecs/features/default_post.prf index 6fb140b252..085527f28d 100644 --- a/mkspecs/features/default_post.prf +++ b/mkspecs/features/default_post.prf @@ -61,6 +61,8 @@ debug { QMAKE_LIBFLAGS += $$QMAKE_LIBFLAGS_RELEASE } +use_gold_linker: QMAKE_LFLAGS += $$QMAKE_LFLAGS_USE_GOLD + dll:win32: QMAKE_LFLAGS += $$QMAKE_LFLAGS_DLL static:mac: QMAKE_LFLAGS += $$QMAKE_LFLAGS_STATIC_LIB staticlib:unix { diff --git a/mkspecs/win32-g++/qmake.conf b/mkspecs/win32-g++/qmake.conf index d26ffb4e21..01c8ab9bc3 100644 --- a/mkspecs/win32-g++/qmake.conf +++ b/mkspecs/win32-g++/qmake.conf @@ -78,6 +78,7 @@ QMAKE_LFLAGS_WINDOWS = -Wl,-subsystem,windows QMAKE_LFLAGS_DLL = -shared QMAKE_LFLAGS_CXX11 = QMAKE_LFLAGS_GCSECTIONS = -Wl,--gc-sections +QMAKE_LFLAGS_USE_GOLD = -fuse-ld=gold QMAKE_LINK_OBJECT_MAX = 10 QMAKE_LINK_OBJECT_SCRIPT = object_script QMAKE_PREFIX_STATICLIB = lib diff --git a/tools/configure/configureapp.cpp b/tools/configure/configureapp.cpp index f1010aea34..6c49b2dc79 100644 --- a/tools/configure/configureapp.cpp +++ b/tools/configure/configureapp.cpp @@ -250,6 +250,8 @@ Configure::Configure(int& argc, char** argv) dictionary[ "C++11" ] = "auto"; + dictionary[ "USE_GOLD_LINKER" ] = "no"; + dictionary[ "SHARED" ] = "yes"; dictionary[ "ZLIB" ] = "auto"; @@ -461,6 +463,10 @@ void Configure::parseCmdLine() dictionary[ "C++11" ] = "yes"; else if (configCmdLine.at(i) == "-no-c++11") dictionary[ "C++11" ] = "no"; + else if (configCmdLine.at(i) == "-use-gold-linker") + dictionary[ "USE_GOLD_LINKER" ] = "yes"; + else if (configCmdLine.at(i) == "-no-use-gold-linker") + dictionary[ "USE_GOLD_LINKER" ] = "no"; else if (configCmdLine.at(i) == "-shared") dictionary[ "SHARED" ] = "yes"; else if (configCmdLine.at(i) == "-static") @@ -1762,6 +1768,9 @@ bool Configure::displayHelp() desc("C++11", "yes", "-c++11", "Compile Qt with C++11 support enabled."); desc("C++11", "no", "-no-c++11", "Do not compile Qt with C++11 support enabled.\n"); + desc("USE_GOLD_LINKER", "yes", "-use-gold-linker", "Link using the GNU gold linker (gcc only)."); + desc("USE_GOLD_LINKER", "no", "-no-use-gold-linker", "Do not link using the GNU gold linker.\n"); + desc("SHARED", "yes", "-shared", "Create and use shared Qt libraries."); desc("SHARED", "no", "-static", "Create and use static Qt libraries.\n"); @@ -2609,6 +2618,9 @@ void Configure::generateOutputVars() if (dictionary[ "C++11" ] == "yes") qtConfig += "c++11"; + if (dictionary[ "USE_GOLD_LINKER" ] == "yes") + qmakeConfig += "use_gold_linker"; + if (dictionary[ "SHARED" ] == "no") qtConfig += "static"; else -- cgit v1.2.3