rust: Implement TARGET_RUST_OS_INFO for *-*-fuchsia*.

gcc/ChangeLog:

	* config.gcc (*-*-fuchsia): Set tmake_rule, rust_target_objs,
	  and target_has_targetrustm.
	* config/fuchsia-rust.cc: New file.
	* config/t-fuchsia: New file.

3 files changed, 64 insertions, 0 deletions

diff --git a/gcc/config.gcc b/gcc/config.gcc
index d33e5df..d297c44 100644
--- a/gcc/config.gcc
+++ b/gcc/config.gcc
@@ -848,6 +848,9 @@ case ${target} in
   ;;
 *-*-fuchsia*)
   native_system_header_dir=/include
+  tmake_file="t-fuchsia"
+  rust_target_objs="${rust_target_objs} fuchsia-rust.o"
+  target_has_targetrustm=yes
   ;;
 *-*-linux* | frv-*-*linux* | *-*-kfreebsd*-gnu | *-*-gnu* | *-*-kopensolaris*-gnu | *-*-uclinuxfdpiceabi)
   extra_options="$extra_options gnu-user.opt"
diff --git a/gcc/config/fuchsia-rust.cc b/gcc/config/fuchsia-rust.cc
new file mode 100644
index 0000000..8626250
--- /dev/null
+++ b/gcc/config/fuchsia-rust.cc
@@ -0,0 +1,40 @@
+/* Fuchsia support needed only by Rust front-end.
+   Copyright (C) 2022 Free Software Foundation, Inc.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 3, or (at your option) any later
+version.
+
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  */
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
+#include "tm_rust.h"
+#include "rust/rust-target.h"
+#include "rust/rust-target-def.h"
+
+/* Implement TARGET_RUST_OS_INFO for Fuchsia targets.  */
+
+static void
+fushsia_rust_target_os_info (void)
+{
+  rust_add_target_info ("target_family", "unix");
+  rust_add_target_info ("target_os", "fushsia");
+  rust_add_target_info ("target_vendor", "unknown");
+  rust_add_target_info ("target_env", "");
+}
+
+#undef TARGET_RUST_OS_INFO
+#define TARGET_RUST_OS_INFO fushsia_rust_target_os_info
+
+struct gcc_targetrustm targetrustm = TARGETRUSTM_INITIALIZER;
diff --git a/gcc/config/t-fuchsia b/gcc/config/t-fuchsia
new file mode 100644
index 0000000..55c884b
--- /dev/null
+++ b/gcc/config/t-fuchsia
@@ -0,0 +1,21 @@
+# Copyright (C) 2022 Free Software Foundation, Inc.
+#
+# This file is part of GCC.
+#
+# GCC is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+#
+# GCC is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with GCC; see the file COPYING3.  If not see
+# <http://www.gnu.org/licenses/>.
+
+fuchsia-rust.o: $(srcdir)/config/fuchsia-rust.cc
+	$(COMPILE) $<
+	$(POSTCOMPILE)