rust: Implement TARGET_RUST_OS_INFO for *-*-solaris2*.

gcc/ChangeLog:

	* config.gcc (*-*-solaris2*): Set rust_target_objs and
	  target_has_targetrustm.
	* config/t-sol2 (sol2-rust.o): New rule.
	* config/sol2-rust.cc: New file.

3 files changed, 47 insertions, 0 deletions

diff --git a/gcc/config.gcc b/gcc/config.gcc
index 6c52df9..fa71276 100644
--- a/gcc/config.gcc
+++ b/gcc/config.gcc
@@ -1017,6 +1017,8 @@ case ${target} in
       ;;
   esac
   target_has_targetdm=yes
+  rust_target_objs="${rust_target_objs} sol2-rust.o"
+  target_has_targetrustm=yes
   ;;
 *-*-*vms*)
   extra_options="${extra_options} vms/vms.opt"
diff --git a/gcc/config/sol2-rust.cc b/gcc/config/sol2-rust.cc
new file mode 100644
index 0000000..e36bd45
--- /dev/null
+++ b/gcc/config/sol2-rust.cc
@@ -0,0 +1,40 @@
+/* Solaris 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 Solaris targets.  */
+
+static void
+solaris_rust_target_os_info (void)
+{
+  rust_add_target_info ("target_family", "unix");
+  rust_add_target_info ("target_os", "solaris");
+  rust_add_target_info ("target_vendor", "sun");
+  rust_add_target_info ("target_env", "");
+}
+
+#undef TARGET_RUST_OS_INFO
+#define TARGET_RUST_OS_INFO solaris_rust_target_os_info
+
+struct gcc_targetrustm targetrustm = TARGETRUSTM_INITIALIZER;
diff --git a/gcc/config/t-sol2 b/gcc/config/t-sol2
index 8732e2e..e207534 100644
--- a/gcc/config/t-sol2
+++ b/gcc/config/t-sol2
@@ -31,6 +31,11 @@ sol2-d.o: $(srcdir)/config/sol2-d.cc
 	$(COMPILE) $<
 	$(POSTCOMPILE)
 
+# Solaris-specific Rust support.
+sol2-rust.o: $(srcdir)/config/sol2-rust.cc
+	$(COMPILE) $<
+	$(POSTCOMPILE)
+
 # Corresponding stub routines.
 sol2-stubs.o: $(srcdir)/config/sol2-stubs.cc
 	$(COMPILE) $<