Link plugins against existing libHSghc

This ticket split out from #3843 (closed) since it was getting too crowded

Once we can safely export all symbols from libHSghc through the executable, we want to link plugins against the loaded GHC library rather than a new copy. This has two benefits:

1. Linking plugins will be faster
2. We can make reinitializeGlobals into a no-op

This is currently blocked by #5292 (closed) because libHSghc exports more symbols than we can reexport on Windows. There is one suggestions in #3843 (closed) to reexport less: exclude more of GHC's dependencies from being reexported, using this snippet to get the package list:

$(foreach p,$(PACKAGES),$p-$(libraries/$p_dist-install_VERSION))

Once we have cut the number of exported symbols down enough, the patches in #3843 (closed)'s attachment 3843-v2.zip can be applied to fix this ticket. (There was a reported validate failure with this patch in annrun01 on x64 linux which should also be checked)

Trac metadata

Trac field	Value
Version	7.0.3
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
Test case
Differential revisions
BlockedBy	#5292 (closed)
Related
Blocking
CC
Operating system
Architecture

mentioned in issue #3843 (closed)

mentioned in issue #5292 (closed)

changed weight to 5

added Tbug Trac import labels

Now the 3843-v2 patches produce unexpected failures for annrun01(ghci) and 5313(ghci), both on 32-bit linux and on 64-bit linux. On 32-bits, both tests segfault, on 64-bits, 5313(ghci) once segfaulted (validate) and once (make TEST=5313) produced

===== program output begins here
5313: /home/dafis/GHC/bghc/inplace/lib/ase: openFile: does not exist (No such file or directory)

for stderr.

annrun01 produced similar stderr:

Stderr:
/home/dafis/GHC/bghc/bindisttest/install dir/lib/ghc-7.3.20110730/ypes_ZC_con_info: openFile: does not exist (No such file or directory)

during validate resp.

/home/dafis/GHC/bghc/inplace/lib/rorHandler_closure: openFile: does not exist (No such file or directory)

with make TEST=annrun01.

Maybe that'll help diagnosing the problem.

Trac metadata

Trac field	Value
CC	→ as@hacks.yi.org

changed milestone to %7.6.1

mentioned in issue #5987 (closed)

changed milestone to %7.6.2

changed milestone to %7.10.1

Moving to 7.10.1.

Trac metadata

Trac field	Value
BlockedBy	#5292 (closed) → #5987 (closed)

removed milestone

Moving to 7.12.1 milestone; if you feel this is an error and should be addressed sooner, please move it back to the 7.10.1 milestone.

Trac metadata

Trac field	Value
TypeOfFailure	OtherFailure → RuntimePerformance

added Pnormal label