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-rw-r--r--config/bootstrap-lto.mk8
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diff --git a/config/bootstrap-lto.mk b/config/bootstrap-lto.mk
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+# This option enables LTO for stage2 and stage3. It requires lto to
+# be enabled for stage1 with --enable-stage1-languages.
+
+STAGE2_CFLAGS += -flto
+STAGE3_CFLAGS += -flto
+
+# Ada fails to build with LTO, turn it off for now.
+BOOT_ADAFLAGS += -fno-lto