[PATCH 14.2 3/3] rust: Copy install-html rule from Ada frontend

[Arthur Cohen]

gcc/rust/ChangeLog:

        * Make-lang.in: Add proper rust.install-html rule.
---
 gcc/rust/Make-lang.in | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/gcc/rust/Make-lang.in b/gcc/rust/Make-lang.in
index 2395541425f..815a8b315c0 100644
--- a/gcc/rust/Make-lang.in
+++ b/gcc/rust/Make-lang.in
@@ -375,7 +375,24 @@ selftest-rust-valgrind: $(RUST_SELFTEST_DEPS)
 rust.install-info:
 
 rust.install-dvi:
-rust.install-html:
+
+rust.install-html: $(build_htmldir)/rust
+       @$(NORMAL_INSTALL)
+       test -z "$(htmldir)" || $(mkinstalldirs) "$(DESTDIR)$(htmldir)"
+       @for p in $(build_htmldir)/rust; do \
+         if test -f "$$p" || test -d "$$p"; then d=""; else d="$(srcdir)/"; 
fi; \
+         f=$(html__strip_dir) \
+         if test -d "$$d$$p"; then \
+           echo " $(mkinstalldirs) '$(DESTDIR)$(htmldir)/$$f'"; \
+           $(mkinstalldirs) "$(DESTDIR)$(htmldir)/$$f" || exit 1; \
+           echo " $(INSTALL_DATA) '$$d$$p'/* '$(DESTDIR)$(htmldir)/$$f'"; \
+           $(INSTALL_DATA) "$$d$$p"/* "$(DESTDIR)$(htmldir)/$$f"; \
+         else \
+           echo " $(INSTALL_DATA) '$$d$$p' '$(DESTDIR)$(htmldir)/$$f'"; \
+           $(INSTALL_DATA) "$$d$$p" "$(DESTDIR)$(htmldir)/$$f"; \
+         fi; \
+       done
+
 rust.install-pdf:
 
 # Install man pages for the front end. This target should ignore errors.
-- 
2.42.0