[gcc/devel/rust/master] rust: Implement TARGET_RUST_OS_INFO for i[34567]86-*-mingw* and x86_64-*-mingw*.

[Thomas Schwinge <tschwinge@gcc.gnu.org>]

https://gcc.gnu.org/g:89babdf7914439b3276b44ad6a7960373cc7df28

commit 89babdf7914439b3276b44ad6a7960373cc7df28
Author: Iain Buclaw <ibuclaw@gdcproject.org>
Date:   Thu Oct 13 16:38:21 2022 +0200

    rust: Implement TARGET_RUST_OS_INFO for i[34567]86-*-mingw* and x86_64-*-mingw*.
    
    gcc/ChangeLog:
    
            * config.gcc (i[34567]86-*-mingw* | x86_64-*-mingw*): Set
              rust_target_objs and target_has_targetrustm.
            * config/t-winnt (winnt-rust.o): New rule.
            * config/winnt-rust.cc: New file.

Diff:
---
 gcc/config.gcc           |  2 ++
 gcc/config/t-winnt       |  4 ++++
 gcc/config/winnt-rust.cc | 40 ++++++++++++++++++++++++++++++++++++++++
 3 files changed, 46 insertions(+)

diff --git a/gcc/config.gcc b/gcc/config.gcc
index d297c441c0f..3996ede2287 100644
--- a/gcc/config.gcc
+++ b/gcc/config.gcc
@@ -2116,6 +2116,8 @@ i[34567]86-*-mingw* | x86_64-*-mingw*)
 	d_target_objs="${d_target_objs} winnt-d.o"
 	target_has_targetcm="yes"
 	target_has_targetdm="yes"
+	rust_target_objs="${rust_target_objs} winnt-rust.o"
+	target_has_targetrustm="yes"
 	case ${target} in
 		x86_64-*-* | *-w64-*)
 			need_64bit_isa=yes
diff --git a/gcc/config/t-winnt b/gcc/config/t-winnt
index c44e9bfe822..3c7c953f5c1 100644
--- a/gcc/config/t-winnt
+++ b/gcc/config/t-winnt
@@ -20,3 +20,7 @@ winnt-c.o: config/winnt-c.cc $(CONFIG_H) $(SYSTEM_H) coretypes.h \
   $(C_TARGET_H) $(C_TARGET_DEF_H)
 	$(COMPILER) -c $(ALL_COMPILERFLAGS) $(ALL_CPPFLAGS) \
 	  $< $(OUTPUT_OPTION)
+
+winnt-rust.o: $(srcdir)/config/winnt-rust.cc
+	$(COMPILE) $<
+	$(POSTCOMPILE)
diff --git a/gcc/config/winnt-rust.cc b/gcc/config/winnt-rust.cc
new file mode 100644
index 00000000000..190584d3961
--- /dev/null
+++ b/gcc/config/winnt-rust.cc
@@ -0,0 +1,40 @@
+/* Windows 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 Windows targets.  */
+
+static void
+winnt_rust_target_os_info (void)
+{
+  rust_add_target_info ("target_family", "windows");
+  rust_add_target_info ("target_os", "windows");
+  rust_add_target_info ("target_vendor", "pc");
+  rust_add_target_info ("target_env", "gnu");
+}
+
+#undef TARGET_RUST_OS_INFO
+#define TARGET_RUST_OS_INFO winnt_rust_target_os_info
+
+struct gcc_targetrustm targetrustm = TARGETRUSTM_INITIALIZER;