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configure,meson: add option to enable LTO

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This patch allows to compile QEMU with link-time optimization (LTO).
Compilation with LTO is handled directly by meson. This patch only
adds the option in configure and forwards the request to meson

Tested with all major versions of clang from 6 to 12

Signed-off-by: Daniele Buono <dbuono@linux.vnet.ibm.com>
Message-Id: <20201204230615.2392-2-dbuono@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Daniele Buono 2020-12-04 18:06:11 -05:00 committed by Paolo Bonzini
parent 3df1a3d070
commit cdad781d09
2 changed files with 8 additions and 0 deletions
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7
configure vendored
View File

@ -242,6 +242,7 @@ host_cc="cc"
audio_win_int="" audio_win_int=""
libs_qga="" libs_qga=""
debug_info="yes" debug_info="yes"
lto="false"
stack_protector="" stack_protector=""
safe_stack="" safe_stack=""
use_containers="yes" use_containers="yes"
@ -1182,6 +1183,10 @@ for opt do
;; ;;
--disable-werror) werror="no" --disable-werror) werror="no"
;; ;;
--enable-lto) lto="true"
;;
--disable-lto) lto="false"
;;
--enable-stack-protector) stack_protector="yes" --enable-stack-protector) stack_protector="yes"
;; ;;
--disable-stack-protector) stack_protector="no" --disable-stack-protector) stack_protector="no"
@ -1779,6 +1784,7 @@ disabled with --disable-FEATURE, default is enabled if available
module-upgrades try to load modules from alternate paths for upgrades module-upgrades try to load modules from alternate paths for upgrades
debug-tcg TCG debugging (default is disabled) debug-tcg TCG debugging (default is disabled)
debug-info debugging information debug-info debugging information
lto Enable Link-Time Optimization.
sparse sparse checker sparse sparse checker
safe-stack SafeStack Stack Smash Protection. Depends on safe-stack SafeStack Stack Smash Protection. Depends on
clang/llvm >= 3.7 and requires coroutine backend ucontext. clang/llvm >= 3.7 and requires coroutine backend ucontext.
@ -6965,6 +6971,7 @@ NINJA=$ninja $meson setup \
-Db_pie=$(if test "$pie" = yes; then echo true; else echo false; fi) \ -Db_pie=$(if test "$pie" = yes; then echo true; else echo false; fi) \
${staticpic:+-Db_staticpic=$staticpic} \ ${staticpic:+-Db_staticpic=$staticpic} \
-Db_coverage=$(if test "$gcov" = yes; then echo true; else echo false; fi) \ -Db_coverage=$(if test "$gcov" = yes; then echo true; else echo false; fi) \
-Db_lto=$lto \
-Dmalloc=$malloc -Dmalloc_trim=$malloc_trim -Dsparse=$sparse \ -Dmalloc=$malloc -Dmalloc_trim=$malloc_trim -Dsparse=$sparse \
-Dkvm=$kvm -Dhax=$hax -Dwhpx=$whpx -Dhvf=$hvf \ -Dkvm=$kvm -Dhax=$hax -Dwhpx=$whpx -Dhvf=$hvf \
-Dxen=$xen -Dxen_pci_passthrough=$xen_pci_passthrough -Dtcg=$tcg \ -Dxen=$xen -Dxen_pci_passthrough=$xen_pci_passthrough -Dtcg=$tcg \

1
meson.build
View File

@ -2080,6 +2080,7 @@ summary_info += {'gprof enabled': config_host.has_key('CONFIG_GPROF')}
summary_info += {'sparse enabled': sparse.found()} summary_info += {'sparse enabled': sparse.found()}
summary_info += {'strip binaries': get_option('strip')} summary_info += {'strip binaries': get_option('strip')}
summary_info += {'profiler': config_host.has_key('CONFIG_PROFILER')} summary_info += {'profiler': config_host.has_key('CONFIG_PROFILER')}
summary_info += {'link-time optimization (LTO)': get_option('b_lto')}
summary_info += {'static build': config_host.has_key('CONFIG_STATIC')} summary_info += {'static build': config_host.has_key('CONFIG_STATIC')}
if targetos == 'darwin' if targetos == 'darwin'
summary_info += {'Cocoa support': config_host.has_key('CONFIG_COCOA')} summary_info += {'Cocoa support': config_host.has_key('CONFIG_COCOA')}