[build] Consolidate stdlib's .v files under a single directory.

Currently, `.v` under the `Coq.` prefix are found in both `theories`
and `plugins`. Usually these two directories are merged by special
loadpath code that allows double-binding of the prefix.

This adds some complexity to the build and loadpath system; and in
particular, it prevents from handling the `Coq.*` prefix in the
simple, `-R theories Coq` standard way.

We thus move all `.v` files to theories, leaving `plugins` as an
OCaml-only directory, and modify accordingly the loadpath / build
infrastructure.

Note that in general `plugins/foo/Foo.v` was not self-contained, in
the sense that it depended on files in `theories` and files in
`theories` depended on it; moreover, Coq saw all these files as
belonging to the same namespace so it didn't really care where they
lived.

This could also imply a performance gain as we now effectively
traverse less directories when locating a library.

See also discussion in #10003

1 files changed, 1 insertions, 1 deletions

diff --git a/Makefile.make b/Makefile.make
index e63a578e37..e020ffc5be 100644
--- a/Makefile.make
+++ b/Makefile.make
@@ -275,7 +275,7 @@ depclean:
 	find . $(FIND_SKIP_DIRS) '(' -name '*.d' ')' -exec rm -f {} +
 
 cacheclean:
-	find theories plugins test-suite -name '.*.aux' -exec rm -f {} +
+	find theories test-suite -name '.*.aux' -exec rm -f {} +
 
 cleanconfig:
 	rm -f config/Makefile config/coq_config.ml dev/ocamldebug-coq config/Info-*.plist