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mk: Add `-C metadata` for compiling crates we ship 

This should re-enable all external builds of crates with the same name. Right
now Cargo doesn't pass `-C metadata` for the top-level library being compiled,
so if that library is called `libc`, for example, then it won't be able to link
to the standard library which *also* has a `libc` library compiled without `-C
metadata`. This can result in naming conflicts which need to be resolved.

By passing `-C metadata` to the in-tree crates we ship it should add some extra
salt to all symbol names to ensure that they don't collide.
This commit is contained in:
Alex Crichton 2016-03-28 09:19:25 -07:00
parent 3602f34e9c
commit 6908e4e10d
1 changed files with 1 additions and 0 deletions
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mk/target.mk
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@ -89,6 +89,7 @@ $$(TLIB$(1)_T_$(2)_H_$(3))/stamp.$(4): \
$$(RUSTFLAGS$(1)_$(4)_T_$(2)) \
--out-dir $$(@D) \
-C extra-filename=-$$(CFG_FILENAME_EXTRA) \
-C metadata=$$(CFG_FILENAME_EXTRA) \
$$<
@touch -r $$@.start_time $$@ && rm $$@.start_time
$$(call LIST_ALL_OLD_GLOB_MATCHES, \