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e04733ee53
Change the bootstrap-lto config file to use slim (non fat) LTO.. Speeds up the LTO bootstrap by ~18% on a 4 core system. This requires using gcc-ar/ranlib in post stage 1 builds, so these are passed to all sub builds. config/: 2014-09-01 Andi Kleen <ak@linux.intel.com> * bootstrap-lto.mk: Implement slim bootstrap. /: 2014-09-01 Andi Kleen <ak@linux.intel.com> * Makefile.tpl (POSTSTAGE1_HOST_EXPORTS): Add LTO_EXPORTS. POSTSTAGE1_FLAGS_TO_PASS): Add LTO_FLAGS_TO_PASS. * Makefile.in: Regenerate. From-SVN: r214801
14 lines
563 B
Makefile
14 lines
563 B
Makefile
# This option enables LTO for stage2 and stage3 in slim mode
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STAGE2_CFLAGS += -flto=jobserver -frandom-seed=1
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STAGE3_CFLAGS += -flto=jobserver -frandom-seed=1
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STAGEprofile_CFLAGS += -fno-lto
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# assumes the host supports the linker plugin
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LTO_AR = $$r/$(HOST_SUBDIR)/prev-gcc/gcc-ar$(exeext) -B$$r/$(HOST_SUBDIR)/prev-gcc/
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LTO_RANLIB = $$r/$(HOST_SUBDIR)/prev-gcc/gcc-ranlib$(exeext) -B$$r/$(HOST_SUBDIR)/prev-gcc/
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LTO_EXPORTS = AR="$(LTO_AR)"; export AR; \
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RANLIB="$(LTO_RANLIB)"; export RANLIB;
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LTO_FLAGS_TO_PASS = AR="$(LTO_AR)" RANLIB="$(LTO_RANLIB)"
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