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LLVM HEAD has changed the behavior of aliases to reject references to things other than definitions. This unfortunately means that the handling of externs breaks,

"inplace/bin/ghc-stage1" -static  -H64m -O0 -fllvm -Iincludes -Iincludes/dist -Iincludes/dist-derivedconstants/header -Iincludes/dist-ghcconstants/header -Irts -Irts/dist/build -DCOMPILING_RTS -package-name rts -dcmm-lint      -i -irts -irts/dist/build -irts/dist/build/autogen -Irts/dist/build -Irts/dist/build/autogen           -O2    -c rts/Apply.cmm -o rts/dist/build/Apply.o
You are using a new version of LLVM that hasn't been tested yet!
We will try though...
Alias must point to a definition
i8* @"barf$alias"
Alias must point to a definition
i8* @"stg_gc_unpt_r1$alias"
Alias must point to a definition
i8* @"stg_apply_interp_info$alias"
Alias must point to a definition
i8* @"stg_yield_to_interpreter$alias"
Alias must point to a definition
i8* @"stg_ap_stack_entries$alias"
Alias must point to a definition
i8* @"__stg_gc_enter_1$alias"
Alias must point to a definition
i8* @"stg_upd_frame_info$alias"
LLVM ERROR: Broken module found, compilation aborted!

In reference to the following aliases,.

@barf = external global i8
@barf$alias = alias private i8* @barf
@stg_gc_unpt_r1 = external global i8
@stg_gc_unpt_r1$alias = alias private i8* @stg_gc_unpt_r1
@stg_apply_interp_info = external global i8
@stg_apply_interp_info$alias = alias private i8* @stg_apply_interp_info
@stg_yield_to_interpreter = external global i8
@stg_yield_to_interpreter$alias = alias private i8* @stg_yield_to_interpreter
@stg_ap_stack_entries = external global i8
@stg_ap_stack_entries$alias = alias private i8* @stg_ap_stack_entries
@__stg_gc_enter_1 = external global i8
@__stg_gc_enter_1$alias = alias private i8* @__stg_gc_enter_1
@stg_upd_frame_info = external global i8
@stg_upd_frame_info$alias = alias private i8* @stg_upd_frame_info

Trac metadata

Trac field	Value
Version	7.8.2
Type	Bug
TypeOfFailure	OtherFailure
Priority	high
Resolution	Unresolved
Component	Compiler
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