From: "mark.yang" <[email protected]> This commit adds support for Clang-specific LTO options.
1. -fuse-linker-plugin is not supported by Clang. 2. -ffat-lto-objects is used to ensure that object files (.o) are generated as ELF even when LTO is applied. During the dwarfsrcfiles process, if LTO is used with the Clang toolchain, static library object files are skipped if they are LLVM bitcode instead of ELF. Therefore, it is recommended to add this to LTOEXTRA if necessary. 3. Adding 'thin-lto' to DISTRO_FEATURES enables -flto=thin. Signed-off-by: mark.yang <[email protected]> --- meta/conf/distro/include/lto.inc | 2 ++ 1 file changed, 2 insertions(+) diff --git a/meta/conf/distro/include/lto.inc b/meta/conf/distro/include/lto.inc index b8193725a1..227f0c5c2a 100644 --- a/meta/conf/distro/include/lto.inc +++ b/meta/conf/distro/include/lto.inc @@ -45,6 +45,8 @@ LTOEXTRA ?= "" # code from .a files to linker LTO ?= "-flto -ffat-lto-objects -fuse-linker-plugin ${LTOEXTRA}" +LTO:toolchain-clang = "${@bb.utils.contains('DISTRO_FEATURES', 'thin-lto', '-flto=thin ${LTOEXTRA}', '-flto ${LTOEXTRA}', d)}" + SELECTED_OPTIMIZATION:append = "${@bb.utils.contains('DISTRO_FEATURES', 'lto', ' ${LTO}', '', d)}" TARGET_LDFLAGS:append:class-target = "${@bb.utils.contains('DISTRO_FEATURES', 'lto', ' ${LTO}', '', d)}"
-=-=-=-=-=-=-=-=-=-=-=- Links: You receive all messages sent to this group. View/Reply Online (#229832): https://lists.openembedded.org/g/openembedded-core/message/229832 Mute This Topic: https://lists.openembedded.org/mt/117395681/21656 Group Owner: [email protected] Unsubscribe: https://lists.openembedded.org/g/openembedded-core/unsub [[email protected]] -=-=-=-=-=-=-=-=-=-=-=-
