* rm-old-base: remove ifdefs for pre-4.13 bases

4.13 and older have fallen out of the support window. Hence this commit
removes code only conditionally included for base 4.13 and older. Some
occasional transitive removals were implied and done in this same commit.

* Remove 8.6.5 from CI and Makefile

* Remove test for GHC <8.6.5

* Update GHC versions mentioned in the user guide

* rm-old-base: use Distribution.Compat.Prelude

The change was likely an artifact of a rebase.

* rm-old-base: restore builds not of cabal itself

The #ifdefs being generated need to be kept here so that projects other
than cabal can be built using older ghc versions and current cabal
versions.

* rm-old-base: restore older catchIO

This needs to be included so running with older bases and ghcs can be
done even while building cabal itself demands recent ghcs.

* Bump base lower bounds to >=4.13

* Update a few package version in the documentation

* rm-old-base: remove Distribution.Compat.Typeable

It's not needed with our currently supported ghcs.

* rm-old-base: restore T6906

---------

Co-authored-by: Andrea Bedini <andrea.bedini@tweag.io>
Co-authored-by: brandon s allbery kf8nh <allbery.b@gmail.com>
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

Die if dynamic executable is requested on Windows

Fix write-ghc-environment-files documentation

Fix ForeignLibs test for Windows

make cabal-install integration tests hermetic

They were using the user's config, which is a problem if they don't
have one or if it contains settings that interfere with tests
(such as `documentation: True`).

I'm not entirely certain of this, but it seems to work here. It's
a bit of a hack, though.

Fix Windows tests

Document `program-options`

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

ci(validate.yml): Allow workflow_dispatch with no allow-newer or constraints

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

Type `Dependency` is an instance of `Ord`, from `Cabal-syntax-3.10.1.0`.

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

* CI: don't allow-newer for GHC 9.10

* allow-newer base for rere

* buildinfo-reference-generator: bump base bound

* cabal-testsuite: bump base bound

Lookup main-is C sources in hs-source-dirs

In the 2decb0e7 refactor we stopped
looking for non-Haskell `main-is` files in the hs-source-dirs and other
appropriate directories. This commit fixes that oversight.

Even if it is not intuitive that main-is-C-sources are searched in the
hs-source-dirs, we don't wish to break users relying on this behaviour
as there does not exist that strong of a motivation to do so.

Fixes #10168

Co-authored-by: sheaf <sam.derbyshire@gmail.com>

fix non-POSIX [[ ]]

Otherwise CI prints `validate.sh: 332: [[: not found` and the line
does nothing (but `validate.sh` continues to run), unless the
system shell is `ksh` / `bash` / `zsh`. This may explain
https://github.com/haskell/cabal/pull/10114#issuecomment-2178163927.

* missed the two changelog pointers

* Apply suggestions from code review

fixup! missed the two changelog pointers

Co-authored-by: ffaf1 <fa-ml@ariis.it>

* squash! and the other two changelogs

---------

Co-authored-by: ffaf1 <fa-ml@ariis.it>
(cherry picked from commit 82cad891)

Co-authored-by: brandon s allbery kf8nh <allbery.b@gmail.com>
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

copy: Take into account extra-dyn-lib-flavours when copying bundled library

This fixes the DynWay case to match the other cases which take into
account extra-dyn-lib-flavours.

haddock-project: added `--all` switch

This matches the installation logic for the validate jobs.

Improve online docs for `includes:` field

Bases:
* https://downloads.haskell.org/~ghc/6.10.1/docs/html/users_guide/release-6-10-1.html
* https://hackage.haskell.org/package/Cabal-2.0.0.2/changelog
* https://github.com/haskell/cabal/commit/e1c39fc9ff4bf4eb8e956e2ee77da95d6cc73bbe