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Before this patch, the only way to override GHC's default logging
behavior was to set `log_action`, `dump_action` and `trace_action`
fields in DynFlags. This patch introduces a new Logger abstraction and
stores it in HscEnv instead.
This is part of #17957 (avoid storing state in DynFlags). DynFlags are
duplicated and updated per-module (because of OPTIONS_GHC pragma), so
we shouldn't store global state in them.
This patch also fixes a race in parallel "--make" mode which updated
the `generatedDumps` IORef concurrently.
Bump haddock submodule
The increase in MultilayerModules is tracked in #19293.
Metric Increase:
MultiLayerModules
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The unit database cache, the home unit and the unit state were stored in
DynFlags while they ought to be stored in the compiler session state
(HscEnv). This patch fixes this.
It introduces a new UnitEnv type that should be used in the future to
handle separate unit environments (especially host vs target units).
Related to #17957
Bump haddock submodule
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This addes the necessary logic to support aarch64 on elf, as well
as aarch64 on mach-o, which Apple calls arm64.
We change architecture name to AArch64, which is the official arm
naming scheme.
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1) Don't modify DynFlags (too much) for -dynamic-too: now when we
generate dynamic outputs for "-dynamic-too", we only set "dynamicNow"
boolean field in DynFlags instead of modifying several other fields.
These fields now have accessors that take dynamicNow into account.
2) Use DynamicTooState ADT to represent -dynamic-too state. It's much
clearer than the undocumented "DynamicTooConditional" that was used
before.
As a result, we can finally remove the hscs_iface_dflags field in
HscRecomp. There was a comment on this field saying:
"FIXME (osa): I don't understand why this is necessary, but I spent
almost two days trying to figure this out and I couldn't .. perhaps
someone who understands this code better will remove this later."
I don't fully understand the details, but it was needed because of the
changes made to the DynFlags for -dynamic-too.
There is still something very dubious in GHC.Iface.Recomp: we have to
disable the "dynamicNow" flag at some point for some Backpack's "heinous
hack" to continue to work. It may be because interfaces for indefinite
units are always non-dynamic, or because we mix and match dynamic and
non-dynamic interfaces (#9176), or something else, who knows?
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Move linker related code into GHC.Linker. Previously it was scattered
into GHC.Unit.State, GHC.Driver.Pipeline, GHC.Runtime.Linker, etc.
Add documentation in GHC.Linker
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