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ifdef CFG_PERF_TOOL
rustc-perf$(X): $(CFG_HOST_TRIPLE)/stage2/bin/rustc$(X)
@$(call E, perf compile: $@)
$(PERF_STAGE2_T_$(CFG_HOST_TRIPLE)_H_$(CFG_HOST_TRIPLE)) \
-o $@ $(COMPILER_CRATE) >rustc-perf.err 2>&1
$(Q)rm -f $(LIBRUSTC_GLOB)
else
rustc-perf$(X): $(CFG_HOST_TRIPLE)/stage2/bin/rustc$(X)
$(Q)touch $@
endif
perf: check-stage2-perf rustc-perf$(X)
$(Q)find $(CFG_HOST_TRIPLE)/test/perf -name \*.err | xargs cat
$(Q)cat rustc-perf.err
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