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f35343550a
webkit fails to link with LTO on at this point. Some of the issues are being worked on upstream and disabling LTO should be re-evaluated as we update this change. (From OE-Core rev: fb24d6504c30d3302fda42b6e6a918d674323a8f) Signed-off-by: Khem Raj <raj.khem@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
50 lines
1.5 KiB
HTML
50 lines
1.5 KiB
HTML
# To enable LTO, add following in local.conf
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# require conf/distro/include/lto.inc
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# DISTRO_FEATURES_append = " lto"
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#
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# Disable LTO for following packages
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LTO_pn-glibc = ""
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LTO_pn-gcc-runtime = ""
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LTO_pn-libgcc-initial = ""
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LTO_pn-libgcc = ""
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LTO_pn-libaio = ""
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LTO_pn-libpam = ""
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LTO_pn-elfutils = ""
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LTO_pn-perl = ""
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LTO_pn-busybox = ""
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LTO_pn-libxcrypt = ""
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LTO_pn-curl = ""
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LTO_pn-libcap = ""
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LTO_pn-libproxy = ""
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LTO_pn-libbsd = ""
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LTO_pn-perf = ""
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# webkit is not linking properly with LTO, disable until next time
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LTO_pn-webkitgtk = ""
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LTO_pn-xserver-xorg = ""
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# Custom LTO flags
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# disable partitioning/streaming algorithm since its uses ASM
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# constructs not compatible with lto
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LTOEXTRA_pn-alsa-lib = "-flto-partition=none"
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LTOEXTRA ?= ""
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# Override it for additional or different options if needed e.g.
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# with clang thin-lto might be better for compile speed
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#
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# ffat-lto-objects
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# object files that contain both the intermediate
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# language and the object code. This makes them
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# usable for both LTO linking and normal linking
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#
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# -fuse-linker-plugin
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# ensures that libraries participate in LTO by supplying intermediate
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# code from .a files to linker
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LTO ?= "-flto -ffat-lto-objects -fuse-linker-plugin ${LTOEXTRA}"
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SELECTED_OPTIMIZATION_append = "${@bb.utils.contains('DISTRO_FEATURES', 'lto', ' ${LTO}', '', d)}"
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TARGET_LDFLAGS_append_class-target = "${@bb.utils.contains('DISTRO_FEATURES', 'lto', ' ${LTO}', '', d)}"
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SELECTED_OPTIMIZATION[vardeps] += "LTO LTOEXTRA"
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