Add Distribution.Compat.MD5

cabal check: cpp-options allows only -D and -U options

Before:

130113 files processed
7304 have lexer/parser warnings
332 build impossible
9742 build warning
49779 build dist suspicious
38666 build dist suspicious warning
11834 build dist inexcusable

After:

130113 files processed
7304 have lexer/parser warnings
332 build impossible
10063 build warning
49779 build dist suspicious
38666 build dist suspicious warning
11834 build dist inexcusable

i.e. 321 build warnings on all Hackage

Examples:

NO_DEBUG_MODE                       -- forgotten -D?
-traditional                        -- doesn't work, nor needed
-fallow-undecidable-instances       -- wrong -options?
-fno-exceptions
-Wall
-Werror
--include=include/config.h          -- doesn't work
-maes                               -- cpp is not C++ ?
-mpclmul
-mssse3

Toon Nolten authored 5 years ago and Daniel Gröber (dxld) committed 5 years ago

* Add deprecated hs-source-dir

I replaced the note about `hs-source-dir` being deprecated in the
description of `hs-source-dirs` by a field of its own to include the
`deprecated` and `removed` fields because it's no longer in 3.0.

* Add note to hs-source-dirs about multiple components

Source directories can be shared among components but there's a
non-obvious caveat which I've tried to clarify with a note.

* Clarify shared source dir note

Modules in a shared source directory can inadvertently end up getting
compiled multiple times.

[ci skip]

Resolve #5472: Add SourceRepositoryPackage..

Remove dead code

This would trip up the improved pattern match checker from [!963](ghc/ghc!963).

The removed code is related to maintaining the round-trip property, so
should be re-introduced at some point. This is tracked in #6193.

New ghc version

(previous update was 2ecdf137)

Default to non-interactive init.

Fix v2-install ProgramDb confusion

Improve docs for html-location

Commit 273dacfd ("Extract installLibraries and InstallExes from
installAction") makes 'getInstalledPackages' get passed the
pre-configCompilerEx ProgramDb which will cause pattern match failures when
the code tries to lookup ghc-pkg in the progdb.

Someone mentioned this section was confusing in #haskell. I added an
example of command line usage so there is no confusion.

[ci skip]

Add changelog for #5977 amd #6134 fixes [ci skip]

which can be parametrised over container of subdirs: [], Maybe, Proxy...

Add cabal-version: 3.2

Depend on tagged to get Proxy

Pass `ld-options` through to GHC

parser: Clearly state that invalid fields are ignored

Ben Gamari authored 5 years ago and Oleg Grenrus committed 5 years ago

Previously we would issue a warning of the following form when
we encountered a field that isn't supported by the cabal-version
declared in the cabal file:

    Warning: ghc-heap.cabal:30:3: The field "cmm-sources" is available
    only since the Cabal specification version 3.0.

The message, however, doesn't tell the user the consequence of this
warning. Consequently a user could easily be confused when the build
subsequently fail.

Avoid this possibility by clearly stating that the field value will be
ignored.

Update to SPDX License List 3.6 2019-07-10