X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=config%2Fbootstrap-lto.mk;h=4de07e5b22698f9f97c45adeb078a217ae72f26e;hb=refs%2Fheads%2Fconcurrent-displaced-stepping-2020-04-01;hp=14099a08b8d7bb687ac75cab3348b4a940eda6aa;hpb=29e66501f7ce527c9abc01061836d37960712546;p=deliverable%2Fbinutils-gdb.git

diff --git a/config/bootstrap-lto.mk b/config/bootstrap-lto.mk
index 14099a08b8..4de07e5b22 100644
--- a/config/bootstrap-lto.mk
+++ b/config/bootstrap-lto.mk
@@ -1,8 +1,18 @@
-# This option enables LTO for stage2 and stage3.  It requires lto to
-# be enabled for stage1 with --enable-stage1-languages.
+# This option enables LTO for stage2 and stage3 in slim mode
 
-STAGE2_CFLAGS += -flto
-STAGE3_CFLAGS += -flto
+STAGE2_CFLAGS += -flto=jobserver -frandom-seed=1
+STAGE3_CFLAGS += -flto=jobserver -frandom-seed=1
+STAGEprofile_CFLAGS += -flto=jobserver -frandom-seed=1
+STAGEtrain_CFLAGS += -flto=jobserver -frandom-seed=1
+STAGEfeedback_CFLAGS += -flto=jobserver -frandom-seed=1
 
-# Ada fails to build with LTO, turn it off for now.
-BOOT_ADAFLAGS += -fno-lto
+# assumes the host supports the linker plugin
+LTO_AR = $$r/$(HOST_SUBDIR)/prev-gcc/gcc-ar$(exeext) -B$$r/$(HOST_SUBDIR)/prev-gcc/
+LTO_RANLIB = $$r/$(HOST_SUBDIR)/prev-gcc/gcc-ranlib$(exeext) -B$$r/$(HOST_SUBDIR)/prev-gcc/
+
+LTO_EXPORTS = AR="$(LTO_AR)"; export AR; \
+	      RANLIB="$(LTO_RANLIB)"; export RANLIB;
+LTO_FLAGS_TO_PASS = AR="$(LTO_AR)" RANLIB="$(LTO_RANLIB)"
+
+do-compare = $(SHELL) $(srcdir)/contrib/compare-lto $$f1 $$f2
+extra-compare = gcc/lto1$(exeext)