2023-03-30 07:58:50 -05:00
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include ../tools.mk
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2021-10-28 12:00:43 -05:00
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# Ensure that crates compiled with different rustc versions cannot
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# be dynamically linked.
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FLAGS := -Cprefer-dynamic -Zsymbol-mangling-version=v0
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UNAME := $(shell uname)
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ifeq ($(UNAME),Linux)
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EXT=".so"
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NM_CMD := nm -D
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endif
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ifeq ($(UNAME),Darwin)
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EXT=".dylib"
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NM_CMD := nm
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endif
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ifndef NM_CMD
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all:
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exit 0
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else
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all:
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# a.rs is a dylib
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$(RUSTC) a.rs --crate-type=dylib $(FLAGS)
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# Write symbols to disk.
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$(NM_CMD) $(call DYLIB,a) > $(TMPDIR)/symbolsbefore
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# b.rs is a binary
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$(RUSTC) b.rs --extern a=$(TMPDIR)/liba$(EXT) --crate-type=bin -Crpath $(FLAGS)
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$(call RUN,b)
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# Now re-compile a.rs with another rustc version
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2022-01-12 15:31:26 -06:00
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RUSTC_FORCE_RUSTC_VERSION=deadfeed $(RUSTC) a.rs --crate-type=dylib $(FLAGS)
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2021-10-28 12:00:43 -05:00
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# After compiling with a different rustc version, write symbols to disk again.
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$(NM_CMD) $(call DYLIB,a) > $(TMPDIR)/symbolsafter
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# As a sanity check, test if the symbols changed:
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# If the symbols are identical, there's been an error.
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if diff $(TMPDIR)/symbolsbefore $(TMPDIR)/symbolsafter; then exit 1; fi
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$(call FAIL,b)
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endif
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