J. Garrett Morris wrote:
Hello,
I've been attempting to add some minor instrumentation to my pet copy
of GHC 6.10.1. In particular, I'd like to add some code to
extendInstEnv in compiler/types/InstEnv.lhs.
First, I tried importing Debug.Trace into the InstEnv module, and
changing the extendInstEnv function to trace "foobar". This built
file, although was not tremendously useful.
Next, I tried the following modification:
extendInstEnv :: InstEnv -> Instance -> InstEnv
extendInstEnv inst_env ins_item@(Instance { is_cls = cls_nm, is_tcs = mb_tcs })
= trace (showSDocDebug (ppr ins_item)) (addToUFM_C add inst_env
cls_nm (ClsIE [ins_item] ins_tyvar))
where
add (ClsIE cur_insts cur_tyvar) _ = ClsIE (ins_item : cur_insts)
(ins_tyvar || cur_tyvar)
ins_tyvar = not (any isJust mb_tcs)
This produced the following error message:
home/garrett/code/ghc-6.10.1/ghc/stage1-inplace/ghc -package-name
base-4.0.0.0-hide-all-packages -no-user-package-conf -split-objs -i
-idist/build -i. -idist/build/autogen -Idist/build/autogen
-Idist/build -Iinclude -optP-include
-optPdist/build/autogen/cabal_macros.h -#include "HsBase.h" -odir
dist/build -hidir dist/build -stubdir dist/build -package
ghc-prim-0.1.0.0 -package integer-0.1.0.0 -package rts-1.0 -O
-package-name base -XMagicHash -XExistentialQuantification
-XRank2Types -XScopedTypeVariables -XUnboxedTuples
-XForeignFunctionInterface -XUnliftedFFITypes -XDeriveDataTypeable
-XGeneralizedNewtypeDeriving -XFlexibleInstances -XPatternSignatures
-XStandaloneDeriving -XPatternGuards -XEmptyDataDecls -XCPP
-idist/build -H32m -O -O2 -Rghc-timing -XGenerics -Wall
-fno-warn-deprecated-flags -c Data/Maybe.hs -o dist/build/Data/Maybe.o
-ohi dist/build/Data/Maybe.hi
dist/build/GHC/Base.hi
Dict fun GHC.Base.$f9:
Interface file inconsistency:
home-package module `base:GHC.Base' is needed,
but is not listed in the dependencies of the interfaces directly
imported by the module being compiled
Cannot continue after interface file error
<<ghc: 20271680 bytes, 2 GCs, 132152/132152 avg/max bytes residency (1
samples), 31M in use, 0.01 INIT (0.02 elapsed), 0.06 MUT (0.14
elapsed), 0.03 GC (0.04 elapsed) :ghc>>
This is rather strange. It looks like an error when compiling Data.Maybe
in the base package. I'm not sure why that would need to be recompiled at
all, and the error itself is strange.
Anyway, when modifying GHC you only need to say 'make' in compiler/, not at
the top-level, that is unless you really want to recompile libraries, in
which case you should probably 'make clean' in libraries/, then 'make boot'
and 'make'.
Cheers,
Simon
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