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| author | Matthew Pickering <matthewtpickering@gmail.com> | 2021-05-05 14:02:37 +0100 |
|---|---|---|
| committer | Matthew Pickering <matthewtpickering@gmail.com> | 2021-06-03 08:46:47 +0100 |
| commit | 25977ab542a30df4ae71d9699d015bcdd1ab7cfb (patch) | |
| tree | fc2195f9ceb5651603aa5fed03580eb47e0412d7 /compiler/GHC/Rename | |
| parent | 79d12d34ad7177d33b191305f2c0157349f97355 (diff) | |
| download | haskell-25977ab542a30df4ae71d9699d015bcdd1ab7cfb.tar.gz | |
Driver Rework Patch
This patch comprises of four different but closely related ideas. The
net result is fixing a large number of open issues with the driver
whilst making it simpler to understand.
1. Use the hash of the source file to determine whether the source file
has changed or not. This makes the recompilation checking more robust to
modern build systems which are liable to copy files around changing
their modification times.
2. Remove the concept of a "stable module", a stable module was one
where the object file was older than the source file, and all transitive
dependencies were also stable. Now we don't rely on the modification
time of the source file, the notion of stability is moot.
3. Fix TH/plugin recompilation after the removal of stable modules. The
TH recompilation check used to rely on stable modules. Now there is a
uniform and simple way, we directly track the linkables which were
loaded into the interpreter whilst compiling a module. This is an
over-approximation but more robust wrt package dependencies changing.
4. Fix recompilation checking for dynamic object files. Now we actually
check if the dynamic object file exists when compiling with -dynamic-too
Fixes #19774 #19771 #19758 #17434 #11556 #9121 #8211 #16495 #7277 #16093
Diffstat (limited to 'compiler/GHC/Rename')
| -rw-r--r-- | compiler/GHC/Rename/Names.hs | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/compiler/GHC/Rename/Names.hs b/compiler/GHC/Rename/Names.hs index a50701b764..6d4806fe47 100644 --- a/compiler/GHC/Rename/Names.hs +++ b/compiler/GHC/Rename/Names.hs @@ -109,7 +109,7 @@ we must also check that these rules hold transitively for all dependent modules and packages. Doing this without caching any trust information would be very slow as we would need to touch all packages and interface files a module depends on. To avoid this we make use of the property that if a modules Safe Haskell -mode changes, this triggers a recompilation from that module in the dependcy +mode changes, this triggers a recompilation from that module in the dependecy graph. So we can just worry mostly about direct imports. There is one trust property that can change for a package though without |